From bb1cd6348502c592dfb77aa5ac86cfe62cc0ba32 Mon Sep 17 00:00:00 2001
From: Zegveld <41897697+Zegveld@users.noreply.github.com>
Date: Sun, 11 Feb 2024 13:29:34 +0100
Subject: [PATCH] #2788 Improve unmapped source properties message for forged
 methods

---
 .../ap/internal/model/BeanMappingMethod.java  | 117 +++----
 .../mapstruct/ap/internal/util/Message.java   |   2 +
 .../nestedbeans/DottedErrorMessageTest.java   | 285 ++++++++++++++----
 ...SourceCollectionElementPropertyMapper.java |  17 ++
 .../UnmappableSourceDeepListMapper.java       |  17 ++
 .../UnmappableSourceDeepMapKeyMapper.java     |  17 ++
 .../UnmappableSourceDeepMapValueMapper.java   |  17 ++
 .../UnmappableSourceDeepNestingMapper.java    |  17 ++
 ...r.java => UnmappableSourceEnumMapper.java} |   2 +-
 .../UnmappableSourceValuePropertyMapper.java  |  17 ++
 ...argetCollectionElementPropertyMapper.java} |   4 +-
 ...va => UnmappableTargetDeepListMapper.java} |   4 +-
 ... => UnmappableTargetDeepMapKeyMapper.java} |   4 +-
 ...> UnmappableTargetDeepMapValueMapper.java} |   4 +-
 ...=> UnmappableTargetDeepNestingMapper.java} |   4 +-
 ... UnmappableTargetValuePropertyMapper.java} |   4 +-
 ...eWarnCollectionElementPropertyMapper.java} |   7 +-
 ...> UnmappableSourceWarnDeepListMapper.java} |   7 +-
 ...UnmappableSourceWarnDeepMapKeyMapper.java} |   7 +-
 ...mappableSourceWarnDeepMapValueMapper.java} |   7 +-
 ...nmappableSourceWarnDeepNestingMapper.java} |   7 +-
 ...appableSourceWarnValuePropertyMapper.java} |   7 +-
 ...etWarnCollectionElementPropertyMapper.java |  17 ++
 .../UnmappableTargetWarnDeepListMapper.java   |  17 ++
 .../UnmappableTargetWarnDeepMapKeyMapper.java |  17 ++
 ...nmappableTargetWarnDeepMapValueMapper.java |  17 ++
 ...UnmappableTargetWarnDeepNestingMapper.java |  17 ++
 ...mappableTargetWarnValuePropertyMapper.java |  17 ++
 28 files changed, 547 insertions(+), 129 deletions(-)
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceCollectionElementPropertyMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepListMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapKeyMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapValueMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepNestingMapper.java
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableEnumMapper.java => UnmappableSourceEnumMapper.java} (96%)
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceValuePropertyMapper.java
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableCollectionElementPropertyMapper.java => UnmappableTargetCollectionElementPropertyMapper.java} (68%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableDeepListMapper.java => UnmappableTargetDeepListMapper.java} (71%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableDeepMapKeyMapper.java => UnmappableTargetDeepMapKeyMapper.java} (71%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableDeepMapValueMapper.java => UnmappableTargetDeepMapValueMapper.java} (70%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableDeepNestingMapper.java => UnmappableTargetDeepNestingMapper.java} (71%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/{UnmappableValuePropertyMapper.java => UnmappableTargetValuePropertyMapper.java} (70%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/{UnmappableWarnCollectionElementPropertyMapper.java => UnmappableSourceWarnCollectionElementPropertyMapper.java} (55%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/{UnmappableWarnDeepListMapper.java => UnmappableSourceWarnDeepListMapper.java} (56%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/{UnmappableWarnDeepMapKeyMapper.java => UnmappableSourceWarnDeepMapKeyMapper.java} (56%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/{UnmappableWarnDeepMapValueMapper.java => UnmappableSourceWarnDeepMapValueMapper.java} (56%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/{UnmappableWarnDeepNestingMapper.java => UnmappableSourceWarnDeepNestingMapper.java} (56%)
 rename processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/{UnmappableWarnValuePropertyMapper.java => UnmappableSourceWarnValuePropertyMapper.java} (56%)
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnCollectionElementPropertyMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepListMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapKeyMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapValueMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepNestingMapper.java
 create mode 100644 processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnValuePropertyMapper.java

diff --git a/processor/src/main/java/org/mapstruct/ap/internal/model/BeanMappingMethod.java b/processor/src/main/java/org/mapstruct/ap/internal/model/BeanMappingMethod.java
index 8979901f8..9abed3ec4 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/model/BeanMappingMethod.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/model/BeanMappingMethod.java
@@ -1718,53 +1718,21 @@ public class BeanMappingMethod extends NormalTypeMappingMethod {
             }
             else if ( !unprocessedTargetProperties.isEmpty() && unmappedTargetPolicy.requiresReport() ) {
 
-                if ( !( method instanceof ForgedMethod ) ) {
-                    Message msg = unmappedTargetPolicy.getDiagnosticKind() == Diagnostic.Kind.ERROR ?
-                        Message.BEANMAPPING_UNMAPPED_TARGETS_ERROR : Message.BEANMAPPING_UNMAPPED_TARGETS_WARNING;
-                    Object[] args = new Object[] {
-                        MessageFormat.format(
-                            "{0,choice,1#property|1<properties}: \"{1}\"",
-                            unprocessedTargetProperties.size(),
-                            Strings.join( unprocessedTargetProperties.keySet(), ", " )
-                        )
-                    };
+                Message unmappedPropertiesMsg;
+                Message unmappedForgedPropertiesMsg;
+                if ( unmappedTargetPolicy.getDiagnosticKind() == Diagnostic.Kind.ERROR ) {
+                    unmappedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_TARGETS_ERROR;
+                    unmappedForgedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_FORGED_TARGETS_ERROR;
+                }
+                else {
+                    unmappedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_TARGETS_WARNING;
+                    unmappedForgedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_FORGED_TARGETS_WARNING;
+                }
 
-                    ctx.getMessager().printMessage(
-                        method.getExecutable(),
-                        msg,
-                        args
-                    );
-                }
-                else if ( !ctx.isErroneous() ) {
-                    Message msg = unmappedTargetPolicy.getDiagnosticKind() == Diagnostic.Kind.ERROR ?
-                        Message.BEANMAPPING_UNMAPPED_FORGED_TARGETS_ERROR :
-                        Message.BEANMAPPING_UNMAPPED_FORGED_TARGETS_WARNING;
-                    String sourceErrorMessage = method.getParameters().get( 0 ).getType().describe();
-                    String targetErrorMessage = method.getReturnType().describe();
-                    if ( ( (ForgedMethod) method ).getHistory() != null ) {
-                        ForgedMethodHistory history = ( (ForgedMethod) method ).getHistory();
-                        sourceErrorMessage = history.createSourcePropertyErrorMessage();
-                        targetErrorMessage = MessageFormat.format(
-                            "\"{0} {1}\"",
-                            history.getTargetType().describe(),
-                            history.createTargetPropertyName()
-                        );
-                    }
-                    Object[] args = new Object[] {
-                        MessageFormat.format(
-                            "{0,choice,1#property|1<properties}: \"{1}\"",
-                            unprocessedTargetProperties.size(),
-                            Strings.join( unprocessedTargetProperties.keySet(), ", " )
-                        ),
-                        sourceErrorMessage,
-                        targetErrorMessage
-                    };
-                    ctx.getMessager().printMessage(
-                        method.getExecutable(),
-                        msg,
-                        args
-                    );
-                }
+                reportErrorForUnmappedProperties(
+                    unprocessedTargetProperties,
+                    unmappedPropertiesMsg,
+                    unmappedForgedPropertiesMsg );
 
             }
         }
@@ -1782,22 +1750,67 @@ public class BeanMappingMethod extends NormalTypeMappingMethod {
 
         private void reportErrorForUnmappedSourcePropertiesIfRequired() {
             ReportingPolicyGem unmappedSourcePolicy = getUnmappedSourcePolicy();
-
             if ( !unprocessedSourceProperties.isEmpty() && unmappedSourcePolicy.requiresReport() ) {
+                Message unmappedPropertiesMsg;
+                Message unmappedForgedPropertiesMsg;
+                if ( unmappedSourcePolicy.getDiagnosticKind() == Diagnostic.Kind.ERROR ) {
+                    unmappedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_SOURCES_ERROR;
+                    unmappedForgedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_FORGED_SOURCES_ERROR;
+                }
+                else {
+                    unmappedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_SOURCES_WARNING;
+                    unmappedForgedPropertiesMsg = Message.BEANMAPPING_UNMAPPED_FORGED_SOURCES_WARNING;
+                }
 
-                Message msg = unmappedSourcePolicy.getDiagnosticKind() == Diagnostic.Kind.ERROR ?
-                    Message.BEANMAPPING_UNMAPPED_SOURCES_ERROR : Message.BEANMAPPING_UNMAPPED_SOURCES_WARNING;
+                reportErrorForUnmappedProperties(
+                    unprocessedSourceProperties,
+                    unmappedPropertiesMsg,
+                    unmappedForgedPropertiesMsg );
+            }
+        }
+
+        private void reportErrorForUnmappedProperties(Map<String, Accessor> unmappedProperties,
+                                                                Message unmappedPropertiesMsg,
+                                                                Message unmappedForgedPropertiesMsg) {
+            if ( !( method instanceof ForgedMethod ) ) {
                 Object[] args = new Object[] {
                     MessageFormat.format(
                         "{0,choice,1#property|1<properties}: \"{1}\"",
-                        unprocessedSourceProperties.size(),
-                        Strings.join( unprocessedSourceProperties.keySet(), ", " )
+                        unmappedProperties.size(),
+                        Strings.join( unmappedProperties.keySet(), ", " )
                     )
                 };
 
                 ctx.getMessager().printMessage(
                     method.getExecutable(),
-                    msg,
+                    unmappedPropertiesMsg,
+                    args
+                );
+            }
+            else if ( !ctx.isErroneous() ) {
+                String sourceErrorMessage = method.getParameters().get( 0 ).getType().describe();
+                String targetErrorMessage = method.getReturnType().describe();
+                if ( ( (ForgedMethod) method ).getHistory() != null ) {
+                    ForgedMethodHistory history = ( (ForgedMethod) method ).getHistory();
+                    sourceErrorMessage = history.createSourcePropertyErrorMessage();
+                    targetErrorMessage = MessageFormat.format(
+                        "\"{0} {1}\"",
+                        history.getTargetType().describe(),
+                        history.createTargetPropertyName()
+                    );
+                }
+                Object[] args = new Object[] {
+                    MessageFormat.format(
+                        "{0,choice,1#property|1<properties}: \"{1}\"",
+                        unmappedProperties.size(),
+                        Strings.join( unmappedProperties.keySet(), ", " )
+                    ),
+                    sourceErrorMessage,
+                    targetErrorMessage
+                };
+                ctx.getMessager().printMessage(
+                    method.getExecutable(),
+                    unmappedForgedPropertiesMsg,
                     args
                 );
             }
diff --git a/processor/src/main/java/org/mapstruct/ap/internal/util/Message.java b/processor/src/main/java/org/mapstruct/ap/internal/util/Message.java
index d8f27791e..ab8fa0101 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/util/Message.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/util/Message.java
@@ -39,6 +39,8 @@ public enum Message {
     BEANMAPPING_UNMAPPED_FORGED_TARGETS_ERROR( "Unmapped target %s. Mapping from %s to %s." ),
     BEANMAPPING_UNMAPPED_SOURCES_WARNING( "Unmapped source %s.", Diagnostic.Kind.WARNING ),
     BEANMAPPING_UNMAPPED_SOURCES_ERROR( "Unmapped source %s." ),
+    BEANMAPPING_UNMAPPED_FORGED_SOURCES_WARNING( "Unmapped source %s. Mapping from %s to %s.", Diagnostic.Kind.WARNING ),
+    BEANMAPPING_UNMAPPED_FORGED_SOURCES_ERROR( "Unmapped source %s. Mapping from %s to %s." ),
     BEANMAPPING_MISSING_IGNORED_SOURCES_ERROR( "Ignored unknown source %s." ),
     BEANMAPPING_CYCLE_BETWEEN_PROPERTIES( "Cycle(s) between properties given via dependsOn(): %s." ),
     BEANMAPPING_UNKNOWN_PROPERTY_IN_DEPENDS_ON( "\"%s\" is no property of the method return type." ),
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/DottedErrorMessageTest.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/DottedErrorMessageTest.java
index f98da19a7..571f3fead 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/DottedErrorMessageTest.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/DottedErrorMessageTest.java
@@ -38,25 +38,38 @@ import org.mapstruct.ap.test.nestedbeans.unmappable.Wheel;
 import org.mapstruct.ap.test.nestedbeans.unmappable.WheelDto;
 import org.mapstruct.ap.test.nestedbeans.unmappable.Word;
 import org.mapstruct.ap.test.nestedbeans.unmappable.WordDto;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableCollectionElementPropertyMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableDeepListMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableDeepMapKeyMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableDeepMapValueMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableDeepNestingMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableEnumMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableValuePropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceCollectionElementPropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceDeepListMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceDeepMapKeyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceDeepMapValueMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceDeepNestingMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceEnumMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableSourceValuePropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableTargetCollectionElementPropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableTargetDeepListMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableTargetDeepMapKeyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableTargetDeepMapValueMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableTargetDeepNestingMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.erroneous.UnmappableTargetValuePropertyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.ignore.UnmappableIgnoreCollectionElementPropertyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.ignore.UnmappableIgnoreDeepListMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.ignore.UnmappableIgnoreDeepMapKeyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.ignore.UnmappableIgnoreDeepMapValueMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.ignore.UnmappableIgnoreDeepNestingMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.ignore.UnmappableIgnoreValuePropertyMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableWarnCollectionElementPropertyMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableWarnDeepListMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableWarnDeepMapKeyMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableWarnDeepMapValueMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableWarnDeepNestingMapper;
-import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableWarnValuePropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableSourceWarnCollectionElementPropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableSourceWarnDeepListMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableSourceWarnDeepMapKeyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableSourceWarnDeepMapValueMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableSourceWarnDeepNestingMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableSourceWarnValuePropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableTargetWarnCollectionElementPropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableTargetWarnDeepListMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableTargetWarnDeepMapKeyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableTargetWarnDeepMapValueMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableTargetWarnDeepNestingMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.warn.UnmappableTargetWarnValuePropertyMapper;
+import org.mapstruct.ap.testutil.IssueKey;
 import org.mapstruct.ap.testutil.ProcessorTest;
 import org.mapstruct.ap.testutil.WithClasses;
 import org.mapstruct.ap.testutil.compilation.annotation.CompilationResult;
@@ -88,12 +101,12 @@ public class DottedErrorMessageTest {
 
     @ProcessorTest
     @WithClasses({
-        UnmappableDeepNestingMapper.class
+        UnmappableTargetDeepNestingMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableDeepNestingMapper.class,
+            @Diagnostic(type = UnmappableTargetDeepNestingMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 14,
                 message = "Unmapped target property: \"rgb\". Mapping from " + PROPERTY +
@@ -101,17 +114,17 @@ public class DottedErrorMessageTest {
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepNestingMapper'.")
         }
     )
-    public void testDeepNestedBeans() {
+    public void testTargetDeepNestedBeans() {
     }
 
     @ProcessorTest
     @WithClasses({
-        UnmappableDeepListMapper.class
+        UnmappableTargetDeepListMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableDeepListMapper.class,
+            @Diagnostic(type = UnmappableTargetDeepListMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 14,
                 message = "Unmapped target property: \"left\". Mapping from " + COLLECTION_ELEMENT +
@@ -119,17 +132,17 @@ public class DottedErrorMessageTest {
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepListMapper'.")
         }
     )
-    public void testIterables() {
+    public void testTargetIterables() {
     }
 
     @ProcessorTest
     @WithClasses({
-        UnmappableDeepMapKeyMapper.class
+        UnmappableTargetDeepMapKeyMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableDeepMapKeyMapper.class,
+            @Diagnostic(type = UnmappableTargetDeepMapKeyMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 14,
                 message = "Unmapped target property: \"pronunciation\". Mapping from " + MAP_KEY +
@@ -137,17 +150,17 @@ public class DottedErrorMessageTest {
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapKeyMapper'.")
         }
     )
-    public void testMapKeys() {
+    public void testTargetMapKeys() {
     }
 
     @ProcessorTest
     @WithClasses({
-        UnmappableDeepMapValueMapper.class
+        UnmappableTargetDeepMapValueMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableDeepMapValueMapper.class,
+            @Diagnostic(type = UnmappableTargetDeepMapValueMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 14,
                 message = "Unmapped target property: \"pronunciation\". Mapping from " + MAP_VALUE +
@@ -155,17 +168,17 @@ public class DottedErrorMessageTest {
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapValueMapper'.")
         }
     )
-    public void testMapValues() {
+    public void testTargetMapValues() {
     }
 
     @ProcessorTest
     @WithClasses({
-        UnmappableCollectionElementPropertyMapper.class
+        UnmappableTargetCollectionElementPropertyMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableCollectionElementPropertyMapper.class,
+            @Diagnostic(type = UnmappableTargetCollectionElementPropertyMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 14,
                 message = "Unmapped target property: \"color\". Mapping from " + PROPERTY +
@@ -173,17 +186,17 @@ public class DottedErrorMessageTest {
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseCollectionElementPropertyMapper'.")
         }
     )
-    public void testCollectionElementProperty() {
+    public void testTargetCollectionElementProperty() {
     }
 
     @ProcessorTest
     @WithClasses({
-        UnmappableValuePropertyMapper.class
+        UnmappableTargetValuePropertyMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableValuePropertyMapper.class,
+            @Diagnostic(type = UnmappableTargetValuePropertyMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 14,
                 message = "Unmapped target property: \"color\". Mapping from " + PROPERTY +
@@ -191,17 +204,131 @@ public class DottedErrorMessageTest {
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseValuePropertyMapper'.")
         }
     )
-    public void testMapValueProperty() {
+    public void testTargetMapValueProperty() {
     }
 
+    @IssueKey( "2788" )
     @ProcessorTest
     @WithClasses({
-        UnmappableEnumMapper.class
+        UnmappableSourceDeepNestingMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = UnmappableEnumMapper.class,
+            @Diagnostic(type = UnmappableSourceDeepNestingMapper.class,
+                kind = javax.tools.Diagnostic.Kind.ERROR,
+                line = 16,
+                message = "Unmapped source property: \"cmyk\". Mapping from " + PROPERTY +
+                    " \"Color house.roof.color\" to \"ColorDto house.roof.color\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepNestingMapper'.")
+        }
+    )
+    public void testSourceDeepNestedBeans() {
+    }
+
+    @IssueKey( "2788" )
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceDeepListMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceDeepListMapper.class,
+                kind = javax.tools.Diagnostic.Kind.ERROR,
+                line = 16,
+                message = "Unmapped source property: \"right\". Mapping from " + COLLECTION_ELEMENT +
+                    " \"Wheel car.wheels\" to \"WheelDto car.wheels\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepListMapper'.")
+        }
+    )
+    public void testSourceIterables() {
+    }
+
+    @IssueKey( "2788" )
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceDeepMapKeyMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceDeepMapKeyMapper.class,
+                kind = javax.tools.Diagnostic.Kind.ERROR,
+                line = 16,
+                message = "Unmapped source property: \"meaning\". Mapping from " + MAP_KEY +
+                    " \"Word dictionary.wordMap{:key}\" to \"WordDto dictionary.wordMap{:key}\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapKeyMapper'.")
+        }
+    )
+    public void testSourceMapKeys() {
+    }
+
+    @IssueKey( "2788" )
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceDeepMapValueMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceDeepMapValueMapper.class,
+                kind = javax.tools.Diagnostic.Kind.ERROR,
+                line = 16,
+                message = "Unmapped source property: \"meaning\". Mapping from " + MAP_VALUE +
+                    " \"ForeignWord dictionary.wordMap{:value}\" to \"ForeignWordDto dictionary.wordMap{:value}\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapValueMapper'.")
+        }
+    )
+    public void testSourceMapValues() {
+    }
+
+    @IssueKey( "2788" )
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceCollectionElementPropertyMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceCollectionElementPropertyMapper.class,
+                kind = javax.tools.Diagnostic.Kind.ERROR,
+                line = 16,
+                message = "Unmapped source property: \"size\". Mapping from " + PROPERTY +
+                    " \"Info computers[].info\" to \"InfoDto computers[].info\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseCollectionElementPropertyMapper'.")
+        }
+    )
+    public void testSourceCollectionElementProperty() {
+    }
+
+    @IssueKey( "2788" )
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceValuePropertyMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceValuePropertyMapper.class,
+                kind = javax.tools.Diagnostic.Kind.ERROR,
+                line = 16,
+                message = "Unmapped source property: \"size\". Mapping from " + PROPERTY +
+                    " \"Info catNameMap{:value}.info\" to \"InfoDto catNameMap{:value}.info\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseValuePropertyMapper'.")
+        }
+    )
+    public void testSourceMapValueProperty() {
+    }
+
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceEnumMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceEnumMapper.class,
                 kind = javax.tools.Diagnostic.Kind.ERROR,
                 line = 25,
                 message =
@@ -211,54 +338,54 @@ public class DottedErrorMessageTest {
             )
         }
     )
-    public void testMapEnumProperty() {
+    public void testSourceMapEnumProperty() {
     }
 
     @ProcessorTest
     @WithClasses({
-        UnmappableWarnDeepNestingMapper.class,
-        UnmappableWarnDeepListMapper.class,
-        UnmappableWarnDeepMapKeyMapper.class,
-        UnmappableWarnDeepMapValueMapper.class,
-        UnmappableWarnCollectionElementPropertyMapper.class,
-        UnmappableWarnValuePropertyMapper.class
+        UnmappableTargetWarnDeepNestingMapper.class,
+        UnmappableTargetWarnDeepListMapper.class,
+        UnmappableTargetWarnDeepMapKeyMapper.class,
+        UnmappableTargetWarnDeepMapValueMapper.class,
+        UnmappableTargetWarnCollectionElementPropertyMapper.class,
+        UnmappableTargetWarnValuePropertyMapper.class
     })
     @ExpectedCompilationOutcome(
         value = CompilationResult.SUCCEEDED,
         diagnostics = {
-            @Diagnostic(type = UnmappableWarnDeepNestingMapper.class,
+            @Diagnostic(type = UnmappableTargetWarnDeepNestingMapper.class,
                 kind = javax.tools.Diagnostic.Kind.WARNING,
-                line = 13,
+                line = 16,
                 message = "Unmapped target property: \"rgb\". Mapping from " + PROPERTY +
                     " \"Color house.roof.color\" to \"ColorDto house.roof.color\"." +
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepNestingMapper'."),
-            @Diagnostic(type = UnmappableWarnDeepListMapper.class,
+            @Diagnostic(type = UnmappableTargetWarnDeepListMapper.class,
                 kind = javax.tools.Diagnostic.Kind.WARNING,
-                line = 13,
+                line = 16,
                 message = "Unmapped target property: \"left\". Mapping from " + COLLECTION_ELEMENT +
                     " \"Wheel car.wheels\" to \"WheelDto car.wheels\"." +
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepListMapper'."),
-            @Diagnostic(type = UnmappableWarnDeepMapKeyMapper.class,
+            @Diagnostic(type = UnmappableTargetWarnDeepMapKeyMapper.class,
                 kind = javax.tools.Diagnostic.Kind.WARNING,
-                line = 13,
+                line = 16,
                 message = "Unmapped target property: \"pronunciation\". Mapping from " + MAP_KEY +
                     " \"Word dictionary.wordMap{:key}\" to \"WordDto dictionary.wordMap{:key}\"." +
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapKeyMapper'."),
-            @Diagnostic(type = UnmappableWarnDeepMapValueMapper.class,
+            @Diagnostic(type = UnmappableTargetWarnDeepMapValueMapper.class,
                 kind = javax.tools.Diagnostic.Kind.WARNING,
-                line = 13,
+                line = 16,
                 message = "Unmapped target property: \"pronunciation\". Mapping from " + MAP_VALUE +
                     " \"ForeignWord dictionary.wordMap{:value}\" to \"ForeignWordDto dictionary.wordMap{:value}\"." +
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapValueMapper'."),
-            @Diagnostic(type = UnmappableWarnCollectionElementPropertyMapper.class,
+            @Diagnostic(type = UnmappableTargetWarnCollectionElementPropertyMapper.class,
                 kind = javax.tools.Diagnostic.Kind.WARNING,
-                line = 13,
+                line = 16,
                 message = "Unmapped target property: \"color\". Mapping from " + PROPERTY +
                     " \"Info computers[].info\" to \"InfoDto computers[].info\"." +
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseCollectionElementPropertyMapper'."),
-            @Diagnostic(type = UnmappableWarnValuePropertyMapper.class,
+            @Diagnostic(type = UnmappableTargetWarnValuePropertyMapper.class,
                 kind = javax.tools.Diagnostic.Kind.WARNING,
-                line = 13,
+                line = 16,
                 message = "Unmapped target property: \"color\". Mapping from " + PROPERTY +
                     " \"Info catNameMap{:value}.info\" to \"InfoDto catNameMap{:value}.info\"." +
                     " Occured at 'UserDto userToUserDto(User user)' in 'BaseValuePropertyMapper'.")
@@ -267,6 +394,60 @@ public class DottedErrorMessageTest {
     public void testWarnUnmappedTargetProperties() {
     }
 
+    @IssueKey( "2788" )
+    @ProcessorTest
+    @WithClasses({
+        UnmappableSourceWarnDeepNestingMapper.class,
+        UnmappableSourceWarnDeepListMapper.class,
+        UnmappableSourceWarnDeepMapKeyMapper.class,
+        UnmappableSourceWarnDeepMapValueMapper.class,
+        UnmappableSourceWarnCollectionElementPropertyMapper.class,
+        UnmappableSourceWarnValuePropertyMapper.class
+    })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.SUCCEEDED,
+        diagnostics = {
+            @Diagnostic(type = UnmappableSourceWarnDeepNestingMapper.class,
+                kind = javax.tools.Diagnostic.Kind.WARNING,
+                line = 16,
+                message = "Unmapped source property: \"cmyk\". Mapping from " + PROPERTY +
+                    " \"Color house.roof.color\" to \"ColorDto house.roof.color\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepNestingMapper'."),
+            @Diagnostic(type = UnmappableSourceWarnDeepListMapper.class,
+                kind = javax.tools.Diagnostic.Kind.WARNING,
+                line = 16,
+                message = "Unmapped source property: \"right\". Mapping from " + COLLECTION_ELEMENT +
+                    " \"Wheel car.wheels\" to \"WheelDto car.wheels\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepListMapper'."),
+            @Diagnostic(type = UnmappableSourceWarnDeepMapKeyMapper.class,
+                kind = javax.tools.Diagnostic.Kind.WARNING,
+                line = 16,
+                message = "Unmapped source property: \"meaning\". Mapping from " + MAP_KEY +
+                    " \"Word dictionary.wordMap{:key}\" to \"WordDto dictionary.wordMap{:key}\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapKeyMapper'."),
+            @Diagnostic(type = UnmappableSourceWarnDeepMapValueMapper.class,
+                kind = javax.tools.Diagnostic.Kind.WARNING,
+                line = 16,
+                message = "Unmapped source property: \"meaning\". Mapping from " + MAP_VALUE +
+                    " \"ForeignWord dictionary.wordMap{:value}\" to \"ForeignWordDto dictionary.wordMap{:value}\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseDeepMapValueMapper'."),
+            @Diagnostic(type = UnmappableSourceWarnCollectionElementPropertyMapper.class,
+                kind = javax.tools.Diagnostic.Kind.WARNING,
+                line = 16,
+                message = "Unmapped source property: \"size\". Mapping from " + PROPERTY +
+                    " \"Info computers[].info\" to \"InfoDto computers[].info\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseCollectionElementPropertyMapper'."),
+            @Diagnostic(type = UnmappableSourceWarnValuePropertyMapper.class,
+                kind = javax.tools.Diagnostic.Kind.WARNING,
+                line = 16,
+                message = "Unmapped source property: \"size\". Mapping from " + PROPERTY +
+                    " \"Info catNameMap{:value}.info\" to \"InfoDto catNameMap{:value}.info\"." +
+                    " Occured at 'UserDto userToUserDto(User user)' in 'BaseValuePropertyMapper'.")
+        }
+    )
+    public void testWarnUnmappedSourceProperties() {
+    }
+
     @ProcessorTest
     @WithClasses({
         UnmappableIgnoreDeepNestingMapper.class,
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceCollectionElementPropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceCollectionElementPropertyMapper.java
new file mode 100644
index 000000000..4696dbca7
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceCollectionElementPropertyMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.erroneous;
+
+import static org.mapstruct.ReportingPolicy.ERROR;
+import static org.mapstruct.ReportingPolicy.IGNORE;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseCollectionElementPropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = ERROR )
+public abstract class UnmappableSourceCollectionElementPropertyMapper extends BaseCollectionElementPropertyMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepListMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepListMapper.java
new file mode 100644
index 000000000..95485fada
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepListMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.erroneous;
+
+import static org.mapstruct.ReportingPolicy.ERROR;
+import static org.mapstruct.ReportingPolicy.IGNORE;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepListMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = ERROR )
+public abstract class UnmappableSourceDeepListMapper extends BaseDeepListMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapKeyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapKeyMapper.java
new file mode 100644
index 000000000..2cb9c30dc
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapKeyMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.erroneous;
+
+import static org.mapstruct.ReportingPolicy.ERROR;
+import static org.mapstruct.ReportingPolicy.IGNORE;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapKeyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = ERROR )
+public abstract class UnmappableSourceDeepMapKeyMapper extends BaseDeepMapKeyMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapValueMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapValueMapper.java
new file mode 100644
index 000000000..1cc2df3d4
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepMapValueMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.erroneous;
+
+import static org.mapstruct.ReportingPolicy.ERROR;
+import static org.mapstruct.ReportingPolicy.IGNORE;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapValueMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = ERROR )
+public abstract class UnmappableSourceDeepMapValueMapper extends BaseDeepMapValueMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepNestingMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepNestingMapper.java
new file mode 100644
index 000000000..d16661044
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceDeepNestingMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.erroneous;
+
+import static org.mapstruct.ReportingPolicy.ERROR;
+import static org.mapstruct.ReportingPolicy.IGNORE;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepNestingMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = ERROR )
+public abstract class UnmappableSourceDeepNestingMapper extends BaseDeepNestingMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableEnumMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceEnumMapper.java
similarity index 96%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableEnumMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceEnumMapper.java
index 1733c9af0..8fcb737ee 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableEnumMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceEnumMapper.java
@@ -20,7 +20,7 @@ import org.mapstruct.ap.test.nestedbeans.unmappable.User;
 import org.mapstruct.ap.test.nestedbeans.unmappable.UserDto;
 
 @Mapper
-public abstract class UnmappableEnumMapper {
+public abstract class UnmappableSourceEnumMapper {
 
     abstract UserDto userToUserDto(User user);
 
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceValuePropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceValuePropertyMapper.java
new file mode 100644
index 000000000..25be36625
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableSourceValuePropertyMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.erroneous;
+
+import static org.mapstruct.ReportingPolicy.ERROR;
+import static org.mapstruct.ReportingPolicy.IGNORE;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseValuePropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = ERROR )
+public abstract class UnmappableSourceValuePropertyMapper extends BaseValuePropertyMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableCollectionElementPropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetCollectionElementPropertyMapper.java
similarity index 68%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableCollectionElementPropertyMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetCollectionElementPropertyMapper.java
index 493442cae..5198324cb 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableCollectionElementPropertyMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetCollectionElementPropertyMapper.java
@@ -10,6 +10,6 @@ import org.mapstruct.ReportingPolicy;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseCollectionElementPropertyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR)
-public abstract class UnmappableCollectionElementPropertyMapper extends BaseCollectionElementPropertyMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR )
+public abstract class UnmappableTargetCollectionElementPropertyMapper extends BaseCollectionElementPropertyMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepListMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepListMapper.java
similarity index 71%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepListMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepListMapper.java
index 275d043cf..993e30ec6 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepListMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepListMapper.java
@@ -10,6 +10,6 @@ import org.mapstruct.ReportingPolicy;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepListMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR)
-public abstract class UnmappableDeepListMapper extends BaseDeepListMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR )
+public abstract class UnmappableTargetDeepListMapper extends BaseDeepListMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepMapKeyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepMapKeyMapper.java
similarity index 71%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepMapKeyMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepMapKeyMapper.java
index c26fbb7df..e30533d00 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepMapKeyMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepMapKeyMapper.java
@@ -10,6 +10,6 @@ import org.mapstruct.ReportingPolicy;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapKeyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR)
-public abstract class UnmappableDeepMapKeyMapper extends BaseDeepMapKeyMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR )
+public abstract class UnmappableTargetDeepMapKeyMapper extends BaseDeepMapKeyMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepMapValueMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepMapValueMapper.java
similarity index 70%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepMapValueMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepMapValueMapper.java
index 4c9c8d9f9..f46651dbc 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepMapValueMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepMapValueMapper.java
@@ -10,6 +10,6 @@ import org.mapstruct.ReportingPolicy;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapValueMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR)
-public abstract class UnmappableDeepMapValueMapper extends BaseDeepMapValueMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR )
+public abstract class UnmappableTargetDeepMapValueMapper extends BaseDeepMapValueMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepNestingMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepNestingMapper.java
similarity index 71%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepNestingMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepNestingMapper.java
index 00b0401ee..736aef3d8 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableDeepNestingMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetDeepNestingMapper.java
@@ -10,6 +10,6 @@ import org.mapstruct.ReportingPolicy;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepNestingMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR)
-public abstract class UnmappableDeepNestingMapper extends BaseDeepNestingMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR )
+public abstract class UnmappableTargetDeepNestingMapper extends BaseDeepNestingMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableValuePropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetValuePropertyMapper.java
similarity index 70%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableValuePropertyMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetValuePropertyMapper.java
index dd657c856..e43f7d2e1 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableValuePropertyMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/erroneous/UnmappableTargetValuePropertyMapper.java
@@ -10,6 +10,6 @@ import org.mapstruct.ReportingPolicy;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseValuePropertyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR)
-public abstract class UnmappableValuePropertyMapper extends BaseValuePropertyMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = ReportingPolicy.ERROR )
+public abstract class UnmappableTargetValuePropertyMapper extends BaseValuePropertyMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnCollectionElementPropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnCollectionElementPropertyMapper.java
similarity index 55%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnCollectionElementPropertyMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnCollectionElementPropertyMapper.java
index 64610a61f..23d12b18d 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnCollectionElementPropertyMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnCollectionElementPropertyMapper.java
@@ -5,10 +5,13 @@
  */
 package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
 
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
 import org.mapstruct.Mapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseCollectionElementPropertyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class)
-public abstract class UnmappableWarnCollectionElementPropertyMapper extends BaseCollectionElementPropertyMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = WARN )
+public abstract class UnmappableSourceWarnCollectionElementPropertyMapper extends BaseCollectionElementPropertyMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepListMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepListMapper.java
similarity index 56%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepListMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepListMapper.java
index 6ca1ce71d..1c72e38ff 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepListMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepListMapper.java
@@ -5,10 +5,13 @@
  */
 package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
 
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
 import org.mapstruct.Mapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepListMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class)
-public abstract class UnmappableWarnDeepListMapper extends BaseDeepListMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = WARN )
+public abstract class UnmappableSourceWarnDeepListMapper extends BaseDeepListMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepMapKeyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepMapKeyMapper.java
similarity index 56%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepMapKeyMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepMapKeyMapper.java
index a010ac05e..bc4f5daa4 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepMapKeyMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepMapKeyMapper.java
@@ -5,10 +5,13 @@
  */
 package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
 
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
 import org.mapstruct.Mapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapKeyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class)
-public abstract class UnmappableWarnDeepMapKeyMapper extends BaseDeepMapKeyMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = WARN )
+public abstract class UnmappableSourceWarnDeepMapKeyMapper extends BaseDeepMapKeyMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepMapValueMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepMapValueMapper.java
similarity index 56%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepMapValueMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepMapValueMapper.java
index 53e60c668..08dc43ede 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepMapValueMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepMapValueMapper.java
@@ -5,10 +5,13 @@
  */
 package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
 
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
 import org.mapstruct.Mapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapValueMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class)
-public abstract class UnmappableWarnDeepMapValueMapper extends BaseDeepMapValueMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = WARN )
+public abstract class UnmappableSourceWarnDeepMapValueMapper extends BaseDeepMapValueMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepNestingMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepNestingMapper.java
similarity index 56%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepNestingMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepNestingMapper.java
index 50d0b366b..61cbc3900 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnDeepNestingMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnDeepNestingMapper.java
@@ -5,10 +5,13 @@
  */
 package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
 
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
 import org.mapstruct.Mapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepNestingMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class)
-public abstract class UnmappableWarnDeepNestingMapper extends BaseDeepNestingMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = WARN )
+public abstract class UnmappableSourceWarnDeepNestingMapper extends BaseDeepNestingMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnValuePropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnValuePropertyMapper.java
similarity index 56%
rename from processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnValuePropertyMapper.java
rename to processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnValuePropertyMapper.java
index f2877b215..fd4f81c97 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableWarnValuePropertyMapper.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableSourceWarnValuePropertyMapper.java
@@ -5,10 +5,13 @@
  */
 package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
 
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
 import org.mapstruct.Mapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.BaseValuePropertyMapper;
 import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
 
-@Mapper(uses = RoofTypeMapper.class)
-public abstract class UnmappableWarnValuePropertyMapper extends BaseValuePropertyMapper {
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = IGNORE, unmappedSourcePolicy = WARN )
+public abstract class UnmappableSourceWarnValuePropertyMapper extends BaseValuePropertyMapper {
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnCollectionElementPropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnCollectionElementPropertyMapper.java
new file mode 100644
index 000000000..e656dac37
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnCollectionElementPropertyMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
+
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseCollectionElementPropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = WARN, unmappedSourcePolicy = IGNORE )
+public abstract class UnmappableTargetWarnCollectionElementPropertyMapper extends BaseCollectionElementPropertyMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepListMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepListMapper.java
new file mode 100644
index 000000000..abf4d4ac7
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepListMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
+
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepListMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = WARN, unmappedSourcePolicy = IGNORE )
+public abstract class UnmappableTargetWarnDeepListMapper extends BaseDeepListMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapKeyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapKeyMapper.java
new file mode 100644
index 000000000..bb5370dd7
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapKeyMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
+
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapKeyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = WARN, unmappedSourcePolicy = IGNORE )
+public abstract class UnmappableTargetWarnDeepMapKeyMapper extends BaseDeepMapKeyMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapValueMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapValueMapper.java
new file mode 100644
index 000000000..b202adcde
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepMapValueMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
+
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepMapValueMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = WARN, unmappedSourcePolicy = IGNORE )
+public abstract class UnmappableTargetWarnDeepMapValueMapper extends BaseDeepMapValueMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepNestingMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepNestingMapper.java
new file mode 100644
index 000000000..99ff003c1
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnDeepNestingMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
+
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseDeepNestingMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = WARN, unmappedSourcePolicy = IGNORE )
+public abstract class UnmappableTargetWarnDeepNestingMapper extends BaseDeepNestingMapper {
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnValuePropertyMapper.java b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnValuePropertyMapper.java
new file mode 100644
index 000000000..a33976849
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/nestedbeans/unmappable/warn/UnmappableTargetWarnValuePropertyMapper.java
@@ -0,0 +1,17 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.ap.test.nestedbeans.unmappable.warn;
+
+import static org.mapstruct.ReportingPolicy.IGNORE;
+import static org.mapstruct.ReportingPolicy.WARN;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.BaseValuePropertyMapper;
+import org.mapstruct.ap.test.nestedbeans.unmappable.RoofTypeMapper;
+
+@Mapper( uses = RoofTypeMapper.class, unmappedTargetPolicy = WARN, unmappedSourcePolicy = IGNORE )
+public abstract class UnmappableTargetWarnValuePropertyMapper extends BaseValuePropertyMapper {
+}