#383 introduction of @InheritConfiguration to align update with create methods (single source)

core-common/src/main/java/org/mapstruct/InheritConfiguration.java

@@ -0,0 +1,49 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Advises the code generator to apply all the {@link Mapping}s from a mapping method to the annotated method
+ * as well. The method should have the same source type and target type.
+ * <p>
+ * A typical use case is annotating an update method (a method with the {@link MappingTarget} in which an existing
+ * target is updated) in order to copy all defined mappings.
+ * <p>
+ * If more than one matching method exists, the name of the method to inherit the configuration from must be
+ * specified via {@link #name()}
+ *
+ * @author Sjaak Derksen
+ */
+@Target( ElementType.METHOD )
+@Retention( RetentionPolicy.SOURCE )
+public @interface InheritConfiguration {
+
+    /**
+     * The name of the mapping method to inherit the mappings from. Needs only to be specified in case more than
+     * one method with matching source and target type exists.
+     *
+     * @return The name of the mapping method to inherit the mappings from.
+     */
+    String name() default "";
+}

processor/src/main/java/org/mapstruct/ap/model/source/SourceMethod.java

@@ -279,6 +279,14 @@ public class SourceMethod implements Method {
             && equals( getResultType(), method.getSourceParameters().iterator().next().getType() );
     }
 
+
+    public boolean isSame(SourceMethod method) {
+        return getSourceParameters().size() == 1 && method.getSourceParameters().size() == 1
+            && equals( getSourceParameters().iterator().next().getType(),
+                    method.getSourceParameters().iterator().next().getType())
+            && equals( getResultType(), method.getResultType() );
+    }
+
     /**
      * {@inheritDoc} {@link Method}
      */
@@ -405,13 +413,15 @@ public class SourceMethod implements Method {
     /**
      * Merges in all the mappings configured via the given inverse mapping method, giving the locally defined mappings
      * precedence.
+     * @param inverseMethod
+     * @param templateMethod
      */
-    public void mergeWithInverseMappings(SourceMethod inverseMethod) {
+    public void mergeWithInverseMappings(SourceMethod inverseMethod, SourceMethod templateMethod) {
         Map<String, List<Mapping>> newMappings = new HashMap<String, List<Mapping>>();
 
         if ( inverseMethod != null && !inverseMethod.getMappings().isEmpty() ) {
-            for ( List<Mapping> mappings : inverseMethod.getMappings().values() ) {
-                for ( Mapping inverseMapping : mappings ) {
+            for ( List<Mapping> lmappings : inverseMethod.getMappings().values() ) {
+                for ( Mapping inverseMapping : lmappings ) {
                     Mapping reversed = inverseMapping.reverse( this, messager, typeFactory );
                     if ( reversed != null ) {
                         List<Mapping> mappingsOfProperty = newMappings.get( reversed.getTargetName() );
@@ -425,6 +435,21 @@ public class SourceMethod implements Method {
             }
         }
 
+        if ( templateMethod != null && !templateMethod.getMappings().isEmpty() ) {
+            for ( List<Mapping> lmappings : templateMethod.getMappings().values() ) {
+                for ( Mapping templateMapping : lmappings ) {
+                    if ( templateMapping != null ) {
+                        List<Mapping> mappingsOfProperty = newMappings.get( templateMapping.getTargetName() );
+                        if ( mappingsOfProperty == null ) {
+                            mappingsOfProperty = new ArrayList<Mapping>();
+                            newMappings.put( templateMapping.getTargetName(), mappingsOfProperty );
+                        }
+                        mappingsOfProperty.add( templateMapping );
+                    }
+                }
+            }
+        }
+
         if ( getMappings().isEmpty() ) {
             // the mapping method is configuredByReverseMappingMethod, see SourceMethod#setMappings()
             setMappings( newMappings );

processor/src/main/java/org/mapstruct/ap/prism/PrismGenerator.java

@@ -23,6 +23,7 @@ import javax.xml.bind.annotation.XmlElementDecl;
 import net.java.dev.hickory.prism.GeneratePrism;
 import net.java.dev.hickory.prism.GeneratePrisms;
 import org.mapstruct.DecoratedWith;
+import org.mapstruct.InheritConfiguration;
 import org.mapstruct.InheritInverseConfiguration;
 import org.mapstruct.IterableMapping;
 import org.mapstruct.MapMapping;
@@ -50,6 +51,7 @@ import org.mapstruct.TargetType;
     @GeneratePrism(value = MappingTarget.class, publicAccess = true),
     @GeneratePrism(value = DecoratedWith.class, publicAccess = true),
     @GeneratePrism(value = MapperConfig.class, publicAccess = true),
+    @GeneratePrism(value = InheritConfiguration.class, publicAccess = true),
     @GeneratePrism(value = InheritInverseConfiguration.class, publicAccess = true),
     @GeneratePrism(value = Qualifier.class, publicAccess = true),
     @GeneratePrism(value = NullValueMapping.class, publicAccess = true),

processor/src/main/java/org/mapstruct/ap/processor/MapperCreationProcessor.java

@@ -50,6 +50,7 @@ import org.mapstruct.ap.model.common.TypeFactory;
 import org.mapstruct.ap.model.source.SourceMethod;
 import org.mapstruct.ap.option.Options;
 import org.mapstruct.ap.prism.DecoratedWithPrism;
+import org.mapstruct.ap.prism.InheritConfigurationPrism;
 import org.mapstruct.ap.prism.InheritInverseConfigurationPrism;
 import org.mapstruct.ap.prism.MapperPrism;
 import org.mapstruct.ap.processor.creation.MappingResolverImpl;
@@ -247,15 +248,20 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
             }
 
             SourceMethod inverseMappingMethod = getInverseMappingMethod( methods, method );
+            SourceMethod templateMappingMethod = getTemplateMappingMethod( methods, method );
 
             boolean hasFactoryMethod = false;
             if ( method.isIterableMapping() ) {
 
                 IterableMappingMethod.Builder builder = new IterableMappingMethod.Builder();
-                if ( method.getIterableMapping() == null && inverseMappingMethod != null &&
-                    inverseMappingMethod.getIterableMapping() != null ) {
+                if ( method.getIterableMapping() == null ) {
+                    if ( inverseMappingMethod != null && inverseMappingMethod.getIterableMapping() != null ) {
                         method.setIterableMapping( inverseMappingMethod.getIterableMapping() );
                     }
+                    else if ( templateMappingMethod != null && templateMappingMethod.getIterableMapping() != null ) {
+                        method.setIterableMapping( templateMappingMethod.getIterableMapping() );
+                    }
+                }
 
                 String dateFormat = null;
                 List<TypeMirror> qualifiers = null;
@@ -278,10 +284,14 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
 
                 MapMappingMethod.Builder builder = new MapMappingMethod.Builder();
 
-                if ( method.getMapMapping() == null && inverseMappingMethod != null &&
-                    inverseMappingMethod.getMapMapping() != null ) {
+                if ( method.getMapMapping() == null ) {
+                    if ( inverseMappingMethod != null && inverseMappingMethod.getMapMapping() != null ) {
                         method.setMapMapping( inverseMappingMethod.getMapMapping() );
                     }
+                    else if ( templateMappingMethod != null && templateMappingMethod.getMapMapping() != null ) {
+                        method.setMapMapping( templateMappingMethod.getMapMapping() );
+                    }
+                }
                 String keyDateFormat = null;
                 String valueDateFormat = null;
                 List<TypeMirror> keyQualifiers = null;
@@ -308,7 +318,7 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
             else if ( method.isEnumMapping() ) {
 
                 EnumMappingMethod.Builder builder = new EnumMappingMethod.Builder();
-                method.mergeWithInverseMappings( inverseMappingMethod );
+                method.mergeWithInverseMappings( inverseMappingMethod, templateMappingMethod );
                 MappingMethod enumMappingMethod = builder
                     .mappingContext( mappingContext )
                     .souceMethod( method )
@@ -321,7 +331,7 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
             else {
 
                 BeanMappingMethod.Builder builder = new BeanMappingMethod.Builder();
-                method.mergeWithInverseMappings( inverseMappingMethod );
+                method.mergeWithInverseMappings( inverseMappingMethod, templateMappingMethod );
                 BeanMappingMethod beanMappingMethod = builder
                     .mappingContext( mappingContext )
                     .souceMethod( method )
@@ -422,6 +432,90 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
         return result;
     }
 
+   /**
+     * Returns the configuring forward method in case the given method is annotated with
+     * {@code @InheritConfiguration} and exactly one such configuring method can unambiguously be selected (as
+     * per the source/target type and optionally the name given via {@code @InheritConfiguration}).
+     *
+     * The method cannot be marked forward mapping itself (hence 'ohter'). And neither can it contain an
+     * {@code @InheritReverseConfiguration}
+     */
+    private SourceMethod getTemplateMappingMethod(List<SourceMethod> rawMethods, SourceMethod method) {
+        SourceMethod result = null;
+        InheritConfigurationPrism forwardPrism = InheritConfigurationPrism.getInstanceOn(
+            method.getExecutable()
+        );
+
+        if (forwardPrism != null) {
+            reportErrorWhenInheritForwardAlsoHasInheritReverseMapping( method );
+
+            // method is configured as being reverse method, collect candidates
+            List<SourceMethod> candidates = new ArrayList<SourceMethod>();
+            for ( SourceMethod oneMethod : rawMethods ) {
+                // method must be similar but not equal
+                if ( oneMethod.isSame( method ) && !( oneMethod.equals( method ) ) ) {
+                    candidates.add( oneMethod );
+                }
+            }
+
+            String name = forwardPrism.name();
+            if ( candidates.size() == 1 ) {
+                // no ambiguity: if no configuredBy is specified, or configuredBy specified and match
+                if ( name.isEmpty() ) {
+                    result = candidates.get( 0 );
+                }
+                else if ( candidates.get( 0 ).getName().equals( name ) ) {
+                    result = candidates.get( 0 );
+                }
+                else {
+                    reportErrorWhenNonMatchingName( candidates.get( 0 ), method, forwardPrism );
+                }
+            }
+            else if ( candidates.size() > 1 ) {
+                // ambiguity: find a matching method that matches configuredBy
+
+                List<SourceMethod> nameFilteredcandidates = new ArrayList<SourceMethod>();
+                for ( SourceMethod candidate : candidates ) {
+                    if ( candidate.getName().equals( name ) ) {
+                        nameFilteredcandidates.add( candidate );
+                    }
+                }
+
+                if ( nameFilteredcandidates.size() == 1 ) {
+                    result = nameFilteredcandidates.get( 0 );
+                }
+                else if ( nameFilteredcandidates.size() > 1 ) {
+                    reportErrorWhenSeveralNamesMatch( nameFilteredcandidates, method, forwardPrism );
+                }
+
+                if ( result == null ) {
+                    reportErrorWhenAmbigousMapping( candidates, method, forwardPrism );
+                }
+            }
+
+            if ( result != null ) {
+                reportErrorIfMethodHasAnnotation( result, method, forwardPrism );
+            }
+
+        }
+        return result;
+    }
+
+    private void reportErrorWhenInheritForwardAlsoHasInheritReverseMapping(SourceMethod method) {
+        InheritInverseConfigurationPrism reversePrism = InheritInverseConfigurationPrism.getInstanceOn(
+                method.getExecutable()
+        );
+        if ( reversePrism != null ) {
+            messager.printMessage(
+                Diagnostic.Kind.ERROR,
+                "Method cannot be annotated with both a @InheritConfiguration and @InheritInverseConfiguration",
+                method.getExecutable(),
+                reversePrism.mirror
+            );
+        }
+
+    }
+
     private void reportErrorIfInverseMethodHasInheritAnnotation(SourceMethod candidate,
                                                                 SourceMethod method,
                                                                 InheritInverseConfigurationPrism reversePrism) {
@@ -442,6 +536,21 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
                 reversePrism.mirror
             );
         }
+
+        InheritConfigurationPrism candidateTemplatePrism = InheritConfigurationPrism.getInstanceOn(
+            candidate.getExecutable()
+        );
+        if ( candidateTemplatePrism != null ) {
+            messager.printMessage(
+                Diagnostic.Kind.ERROR,
+                String.format(
+                    "Resolved inverse mapping method %s() should not carry the @InheritConfiguration annotation.",
+                    candidate.getName()
+                ),
+                method.getExecutable(),
+                reversePrism.mirror
+            );
+        }
     }
 
     private void reportErrorWhenAmbigousReverseMapping(List<SourceMethod> candidates, SourceMethod method,
@@ -504,4 +613,104 @@ public class MapperCreationProcessor implements ModelElementProcessor<List<Sourc
             reversePrism.mirror
         );
     }
+
+    private void reportErrorIfMethodHasAnnotation(SourceMethod candidate,
+            SourceMethod method,
+            InheritConfigurationPrism prism) {
+
+        InheritConfigurationPrism candidatePrism = InheritConfigurationPrism.getInstanceOn(
+            candidate.getExecutable()
+        );
+
+        if ( candidatePrism != null ) {
+            messager.printMessage(
+                Diagnostic.Kind.ERROR,
+                String.format(
+                    "Resolved mapping method %s() should not carry the @InheritConfiguration annotation itself.",
+                    candidate.getName()
+                ),
+                method.getExecutable(),
+                prism.mirror
+            );
+        }
+
+        InheritInverseConfigurationPrism candidateInversePrism = InheritInverseConfigurationPrism.getInstanceOn(
+            candidate.getExecutable()
+        );
+
+        if ( candidateInversePrism != null ) {
+            messager.printMessage(
+                Diagnostic.Kind.ERROR,
+                String.format(
+                    "Resolved mapping method %s() should not carry the @InheritInverseConfiguration annotation.",
+                    candidate.getName()
+                ),
+                method.getExecutable(),
+                prism.mirror
+            );
+        }
+    }
+
+    private void reportErrorWhenAmbigousMapping(List<SourceMethod> candidates, SourceMethod method,
+                                                       InheritConfigurationPrism prism) {
+
+        List<String> candidateNames = new ArrayList<String>();
+        for ( SourceMethod candidate : candidates ) {
+            candidateNames.add( candidate.getName() );
+        }
+
+        String name = prism.name();
+        if ( name.isEmpty() ) {
+            messager.printMessage(
+                Diagnostic.Kind.ERROR,
+                String.format(
+                    "Several matching methods exist: %s(). Specify a name explicitly.",
+                    Strings.join( candidateNames, "(), " )
+                ),
+                method.getExecutable(),
+                prism.mirror
+            );
+        }
+        else {
+            messager.printMessage(
+                Diagnostic.Kind.ERROR,
+                String.format(
+                    "None of the candidates %s() matches given name: \"%s\".",
+                    Strings.join( candidateNames, "(), " ), name
+                ),
+                method.getExecutable(),
+                prism.mirror
+            );
+        }
+    }
+
+    private void reportErrorWhenSeveralNamesMatch(List<SourceMethod> candidates, SourceMethod method,
+                                                  InheritConfigurationPrism prism) {
+
+        messager.printMessage(
+            Diagnostic.Kind.ERROR,
+            String.format(
+                "Given name \"%s\" matches several candidate methods: %s().",
+                prism.name(), Strings.join( candidates, "(), " )
+            ),
+            method.getExecutable(),
+            prism.mirror
+        );
+    }
+
+    private void reportErrorWhenNonMatchingName(SourceMethod onlyCandidate, SourceMethod method,
+                                                InheritConfigurationPrism prims) {
+
+        messager.printMessage(
+            Diagnostic.Kind.ERROR,
+            String.format(
+                "Given name \"%s\" does not match the only candidate. Did you mean: \"%s\".",
+                prims.name(), onlyCandidate.getName()
+            ),
+            method.getExecutable(),
+            prims.mirror
+        );
+    }
+
+
 }

processor/src/test/java/org/mapstruct/ap/test/reverse/InheritInverseConfigurationTest.java

@@ -120,18 +120,43 @@ public class InheritInverseConfigurationTest {
     }
 
     @Test
-    @WithClasses({ SourceTargetMapperErroneouslyAnnotated.class })
+    @WithClasses({ SourceTargetMapperErroneouslyAnnotated1.class })
     @ExpectedCompilationOutcome(
         value = CompilationResult.FAILED,
         diagnostics = {
-            @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated.class,
+            @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated1.class,
                 kind = Kind.ERROR,
-                line = 49,
+                line = 50,
                 messageRegExp = "Resolved inverse mapping method reverse\\(\\) should not carry the "
                     + "@InheritInverseConfiguration annotation itself.")
         }
     )
-    public void shouldUseWronglyAnnotatedError() {
+    public void shouldUseWronglyAnnotatedError1() {
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperErroneouslyAnnotated2.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+                @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated2.class,
+                        kind = Kind.WARNING,
+                        line = 45,
+                        messageRegExp = "Unmapped target properties: \"stringPropX, integerPropX, "
+                                + "someConstantDownstream, propertyToIgnoreDownstream\""),
+                @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated2.class,
+                        kind = Kind.ERROR,
+                        line = 47,
+                        messageRegExp = "Resolved inverse mapping method forward2\\(\\) should not carry "
+                                + "the @InheritConfiguration annotation"),
+                @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated2.class,
+                        kind = Kind.WARNING,
+                        line = 48,
+                        messageRegExp = "Unmapped target properties: \"stringPropY, integerPropY, "
+                                + "propertyNotToIgnoreUpstream\"")
+            }
+    )
+    public void shouldUseWronglyAnnotatedError2() {
     }
 
     @Test
@@ -152,4 +177,5 @@ public class InheritInverseConfigurationTest {
     )
     public void shouldAdviseOnSpecifyingCorrectName() {
     }
+
 }

processor/src/test/java/org/mapstruct/ap/test/reverse/SourceTargetMapperErroneouslyAnnotated1.java

@@ -28,9 +28,10 @@ import org.mapstruct.factory.Mappers;
  * @author Sjaak Derksen
  */
 @Mapper
-public interface SourceTargetMapperErroneouslyAnnotated {
+public interface SourceTargetMapperErroneouslyAnnotated1 {
 
-    SourceTargetMapperErroneouslyAnnotated INSTANCE = Mappers.getMapper( SourceTargetMapperErroneouslyAnnotated.class );
+    SourceTargetMapperErroneouslyAnnotated1 INSTANCE =
+            Mappers.getMapper( SourceTargetMapperErroneouslyAnnotated1.class );
 
     @Mappings({
         @Mapping(source = "stringPropX", target = "stringPropY"),

processor/src/test/java/org/mapstruct/ap/test/reverse/SourceTargetMapperErroneouslyAnnotated2.java

@@ -0,0 +1,49 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.reverse;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperErroneouslyAnnotated2 {
+
+    SourceTargetMapperErroneouslyAnnotated2 INSTANCE
+            = Mappers.getMapper( SourceTargetMapperErroneouslyAnnotated2.class );
+
+    @Mappings({
+        @Mapping(source = "stringPropX", target = "stringPropY"),
+        @Mapping(source = "integerPropX", target = "integerPropY"),
+        @Mapping(source = "propertyToIgnoreDownstream", target = "propertyNotToIgnoreUpstream")
+    })
+    Target forward(Source source);
+
+    @InheritConfiguration(name = "forward2")
+    Source forward2(Target target);
+
+    @InheritInverseConfiguration(name = "forward2")
+    Target reverse(Source source);
+}

processor/src/test/java/org/mapstruct/ap/test/template/InheritConfigurationTest.java

@@ -0,0 +1,205 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+
+import javax.tools.Diagnostic.Kind;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mapstruct.ap.testutil.IssueKey;
+import org.mapstruct.ap.testutil.WithClasses;
+import org.mapstruct.ap.testutil.runner.AnnotationProcessorTestRunner;
+
+import static org.fest.assertions.Assertions.assertThat;
+import org.mapstruct.ap.testutil.compilation.annotation.CompilationResult;
+import org.mapstruct.ap.testutil.compilation.annotation.Diagnostic;
+import org.mapstruct.ap.testutil.compilation.annotation.ExpectedCompilationOutcome;
+
+/**
+ * @author Sjaak Derksen
+ */
+@IssueKey("383")
+@WithClasses({ Source.class, NestedSource.class, Target.class })
+@RunWith(AnnotationProcessorTestRunner.class)
+public class InheritConfigurationTest {
+
+    @Test
+    @WithClasses({ SourceTargetMapperSingle.class })
+    public void shouldInheritConfigurationSingleCandidates() {
+
+        Source source = new Source();
+        source.setStringPropX( "1" );
+        source.setIntegerPropX( 2 );
+        source.setNestedSourceProp( new NestedSource("nested") );
+
+        Target createdTarget = SourceTargetMapperSingle.INSTANCE.forwardCreate( source );
+        assertThat( createdTarget ).isNotNull();
+        assertThat( createdTarget.getStringPropY() ).isEqualTo( "1" );
+        assertThat( createdTarget.getIntegerPropY() ).isEqualTo( 2 );
+        assertThat( createdTarget.getNestedResultProp() ).isEqualTo( "nested");
+        assertThat( createdTarget.getExpressionProp() ).isEqualTo( "expression" );
+        assertThat( createdTarget.getConstantProp() ).isEqualTo( "constant" );
+
+        Target updatedTarget = new Target();
+        SourceTargetMapperSingle.INSTANCE.forwardUpdate( source, updatedTarget );
+        assertThat( updatedTarget ).isNotNull();
+        assertThat( updatedTarget.getStringPropY() ).isEqualTo( "1" );
+        assertThat( updatedTarget.getIntegerPropY() ).isEqualTo( 2 );
+        assertThat( updatedTarget.getNestedResultProp() ).isEqualTo( "nested" );
+        assertThat( updatedTarget.getExpressionProp() ).isEqualTo( "expression" );
+        assertThat( updatedTarget.getConstantProp() ).isEqualTo( "constant" );
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperMultiple.class })
+    public void shouldInheritConfigurationMultipleCandidates() {
+
+        Source source = new Source();
+        source.setStringPropX( "1" );
+        source.setIntegerPropX( 2 );
+        source.setNestedSourceProp( new NestedSource("nested") );
+
+        Target createdTarget = SourceTargetMapperSingle.INSTANCE.forwardCreate( source );
+        assertThat( createdTarget ).isNotNull();
+        assertThat( createdTarget.getStringPropY() ).isEqualTo( "1" );
+        assertThat( createdTarget.getIntegerPropY() ).isEqualTo( 2 );
+        assertThat( createdTarget.getNestedResultProp() ).isEqualTo( "nested");
+        assertThat( createdTarget.getExpressionProp() ).isEqualTo( "expression" );
+        assertThat( createdTarget.getConstantProp() ).isEqualTo( "constant" );
+
+        Target updatedTarget = new Target();
+        SourceTargetMapperSingle.INSTANCE.forwardUpdate( source, updatedTarget );
+        assertThat( updatedTarget ).isNotNull();
+        assertThat( updatedTarget.getStringPropY() ).isEqualTo( "1" );
+        assertThat( updatedTarget.getIntegerPropY() ).isEqualTo( 2 );
+        assertThat( updatedTarget.getNestedResultProp() ).isEqualTo( "nested" );
+        assertThat( updatedTarget.getExpressionProp() ).isEqualTo( "expression" );
+        assertThat( updatedTarget.getConstantProp() ).isEqualTo( "constant" );
+
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperAmbiguous1.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = SourceTargetMapperAmbiguous1.class,
+                kind = Kind.ERROR,
+                line = 54,
+                messageRegExp = "Several matching methods exist: forwardCreate\\(\\), "
+                    + "forwardCreate1\\(\\). Specify a name explicitly."),
+            @Diagnostic(type = SourceTargetMapperAmbiguous1.class,
+                kind = Kind.WARNING,
+                line = 55,
+                messageRegExp = "Unmapped target properties: \"stringPropY, nestedResultProp, integerPropY, "
+                        + "constantProp, expressionProp\"")
+        }
+    )
+    public void shouldRaiseAmbiguousReverseMethodError() {
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperAmbiguous2.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = SourceTargetMapperAmbiguous2.class,
+                kind = Kind.ERROR,
+                line = 54,
+                messageRegExp = "None of the candidates forwardCreate\\(\\), forwardCreate1\\(\\) matches given "
+                    + "name: \"blah\"."),
+            @Diagnostic(type = SourceTargetMapperAmbiguous2.class,
+                kind = Kind.WARNING,
+                line = 55,
+                messageRegExp = "Unmapped target properties: \"stringPropY, nestedResultProp, integerPropY, "
+                        + "constantProp, expressionProp\"")
+        }
+    )
+    public void shouldRaiseAmbiguousReverseMethodErrorWrongName() {
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperAmbiguous3.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = SourceTargetMapperAmbiguous3.class,
+                kind = Kind.ERROR,
+                line = 54,
+                messageRegExp = "Given name \"forwardCreate\" matches several candidate methods: "
+                        + ".*forwardCreate.*\\(\\), .*forwardCreate.*\\(\\)"),
+            @Diagnostic(type = SourceTargetMapperAmbiguous3.class,
+                kind = Kind.WARNING,
+                line = 55,
+                messageRegExp = "Unmapped target properties: \"stringPropY, nestedResultProp, integerPropY, "
+                        + "constantProp, expressionProp\"")        }
+    )
+    public void shouldRaiseAmbiguousReverseMethodErrorDuplicatedName() {
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperErroneouslyAnnotated1.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated1.class,
+                kind = Kind.ERROR,
+                line = 49,
+                messageRegExp = "Resolved mapping method forwardCreate1\\(\\) should not carry the "
+                    + "@InheritConfiguration annotation itself.")
+        }
+    )
+    public void shouldUseWronglyAnnotatedError1() {
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperErroneouslyAnnotated2.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = SourceTargetMapperErroneouslyAnnotated2.class,
+                kind = Kind.ERROR,
+                line = 51,
+                messageRegExp = "Resolved mapping method forwardCreate\\(\\) should not carry the "
+                    + "@InheritInverseConfiguration annotation.")
+        }
+    )
+    public void shouldUseWronglyAnnotatedError2() {
+    }
+
+    @Test
+    @WithClasses({ SourceTargetMapperNonMatchingName.class })
+    @ExpectedCompilationOutcome(
+        value = CompilationResult.FAILED,
+        diagnostics = {
+            @Diagnostic(type = SourceTargetMapperNonMatchingName.class,
+                kind = Kind.ERROR,
+                line = 45,
+                messageRegExp = "Given name \"blah\" does not match the only candidate. Did you mean: "
+                    + "\"forwardCreate\"."),
+            @Diagnostic(type = SourceTargetMapperNonMatchingName.class,
+                        kind = Kind.WARNING,
+                        line = 46,
+                        messageRegExp = "Unmapped target properties: \"stringPropY, nestedResultProp, integerPropY, "
+                        + "constantProp, expressionProp\"")
+        }
+    )
+    public void shouldAdviseOnSpecifyingCorrectName() {
+    }
+}

processor/src/test/java/org/mapstruct/ap/test/template/NestedSource.java

@@ -0,0 +1,42 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+public class NestedSource {
+
+    private String nested;
+
+    public NestedSource(String nested) {
+        this.nested = nested;
+    }
+
+
+    public String getNested() {
+        return nested;
+    }
+
+    public void setNested(String nested) {
+        this.nested = nested;
+    }
+
+}

processor/src/test/java/org/mapstruct/ap/test/template/Source.java

@@ -0,0 +1,57 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+
+/**
+ * @author Sjaak Derksen
+ */
+public class Source {
+
+    private String stringPropX;
+
+    private Integer integerPropX;
+
+    private NestedSource nestedSourceProp;
+
+
+    public String getStringPropX() {
+        return stringPropX;
+    }
+
+    public void setStringPropX(String stringPropX) {
+        this.stringPropX = stringPropX;
+    }
+
+    public Integer getIntegerPropX() {
+        return integerPropX;
+    }
+
+    public void setIntegerPropX(Integer integerPropX) {
+        this.integerPropX = integerPropX;
+    }
+
+    public NestedSource getNestedSourceProp() {
+        return nestedSourceProp;
+    }
+
+    public void setNestedSourceProp(NestedSource nestedSourceProp) {
+        this.nestedSourceProp = nestedSourceProp;
+    }
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperAmbiguous1.java

@@ -0,0 +1,56 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperAmbiguous1 {
+
+    SourceTargetMapperAmbiguous1 INSTANCE = Mappers.getMapper( SourceTargetMapperAmbiguous1.class );
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate(Source source);
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate1(Source source);
+
+    @InheritConfiguration
+    void forwardUpdate(Source source, @MappingTarget Target target);
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperAmbiguous2.java

@@ -0,0 +1,56 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperAmbiguous2 {
+
+    SourceTargetMapperAmbiguous2 INSTANCE = Mappers.getMapper( SourceTargetMapperAmbiguous2.class );
+
+   @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate(Source source);
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate1(Source source);
+
+    @InheritConfiguration( name = "blah" )
+    void forwardUpdate(Source source, @MappingTarget Target target);
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperAmbiguous3.java

@@ -0,0 +1,56 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperAmbiguous3 {
+
+    SourceTargetMapperAmbiguous3 INSTANCE = Mappers.getMapper( SourceTargetMapperAmbiguous3.class );
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")"),
+    })
+    Target forwardCreate(Source source);
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")"),
+    })
+    void forwardCreate(Source source, @MappingTarget Target target);
+
+    @InheritConfiguration(name = "forwardCreate")
+    void forwardUpdate(Source source, @MappingTarget Target target);
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperErroneouslyAnnotated1.java

@@ -0,0 +1,51 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperErroneouslyAnnotated1 {
+
+    SourceTargetMapperErroneouslyAnnotated1 INSTANCE =
+            Mappers.getMapper( SourceTargetMapperErroneouslyAnnotated1.class );
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX"),
+        @Mapping(target = "integerPropY", source = "integerPropX"),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate(Source source);
+
+    @InheritConfiguration( name = "forwardCreate" )
+    Target forwardCreate1(Source source);
+
+    @InheritConfiguration( name = "forwardCreate1" )
+    void forwardUpdate(Source source, @MappingTarget Target target);
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperErroneouslyAnnotated2.java

@@ -0,0 +1,54 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperErroneouslyAnnotated2 {
+
+    SourceTargetMapperErroneouslyAnnotated2 INSTANCE =
+            Mappers.getMapper( SourceTargetMapperErroneouslyAnnotated2.class );
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX"),
+        @Mapping(target = "integerPropY", source = "integerPropX"),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate(Source source);
+
+    @InheritInverseConfiguration(name = "forwardCreate")
+    @Mapping(target = "nestedSourceProp", ignore = true)
+    Source forwardCreate(Target source);
+
+    @InheritConfiguration( name = "forwardCreate" )
+    void forwardUpdate(Target source, @MappingTarget Source target);
+
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperMultiple.java

@@ -0,0 +1,56 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperMultiple {
+
+    SourceTargetMapperMultiple INSTANCE = Mappers.getMapper( SourceTargetMapperMultiple.class );
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")"),
+    })
+    Target forwardCreate(Source source);
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")"),
+    })
+    Target forwardCreate2(Source source);
+
+    @InheritConfiguration(  name = "forwardCreate" )
+    void forwardUpdate(Source source, @MappingTarget Target target);
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperNonMatchingName.java

@@ -0,0 +1,47 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperNonMatchingName {
+
+    SourceTargetMapperNonMatchingName INSTANCE = Mappers.getMapper( SourceTargetMapperNonMatchingName.class );
+
+   @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")")
+    })
+    Target forwardCreate(Source source);
+
+    @InheritConfiguration( name = "blah" )
+    void forwardUpdate(Source source, @MappingTarget Target target);
+}

processor/src/test/java/org/mapstruct/ap/test/template/SourceTargetMapperSingle.java

@@ -0,0 +1,49 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+import org.mapstruct.InheritConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+/**
+ * @author Sjaak Derksen
+ */
+@Mapper
+public interface SourceTargetMapperSingle {
+
+    SourceTargetMapperSingle INSTANCE = Mappers.getMapper( SourceTargetMapperSingle.class );
+
+    @Mappings({
+        @Mapping(target = "stringPropY", source = "stringPropX" ),
+        @Mapping(target = "integerPropY", source = "integerPropX" ),
+        @Mapping(target = "nestedResultProp", source = "nestedSourceProp.nested"),
+        @Mapping(target = "constantProp", constant = "constant"),
+        @Mapping(target = "expressionProp", expression = "java(\"expression\")"),
+    })
+    Target forwardCreate(Source source);
+
+
+    @InheritConfiguration
+    void forwardUpdate(Source source, @MappingTarget Target target);
+
+}

processor/src/test/java/org/mapstruct/ap/test/template/Target.java

@@ -0,0 +1,77 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.mapstruct.ap.test.template;
+
+
+/**
+ * @author Sjaak Derksen
+ */
+public class Target {
+
+    private String stringPropY;
+
+    private Integer integerPropY;
+
+    private String constantProp;
+
+    private String expressionProp;
+
+    private String nestedResultProp;
+
+    public String getStringPropY() {
+        return stringPropY;
+    }
+
+    public void setStringPropY(String stringPropY) {
+        this.stringPropY = stringPropY;
+    }
+
+    public Integer getIntegerPropY() {
+        return integerPropY;
+    }
+
+    public void setIntegerPropY(Integer integerPropY) {
+        this.integerPropY = integerPropY;
+    }
+
+    public String getConstantProp() {
+        return constantProp;
+    }
+
+    public void setConstantProp(String constantProp) {
+        this.constantProp = constantProp;
+    }
+
+    public String getExpressionProp() {
+        return expressionProp;
+    }
+
+    public void setExpressionProp(String expressionProp) {
+        this.expressionProp = expressionProp;
+    }
+
+    public String getNestedResultProp() {
+        return nestedResultProp;
+    }
+
+    public void setNestedResultProp(String nestedResultProp) {
+        this.nestedResultProp = nestedResultProp;
+    }
+
+}