#330 Making target() mandatory

core-jdk8/src/main/java/org/mapstruct/Mapping.java

@@ -29,36 +29,41 @@ import java.util.Date;
 
 /**
  * Configures the mapping of one bean attribute or enum constant.
+ * <p>
+ * The name of the mapped attribute or constant is to be specified via {@link #target()}. For mapped bean attributes it
+ * is assumed by default that the attribute has the same name in the source bean. Alternatively, one of
+ * {@link #source()}, {@link #expression()} or {@link #constant()} can be specified to define the property source.
+ * <p>
+ * In addition, the attributes {@link #dateFormat()} and {@link #qualifiedBy()} may be used to further define the
+ * mapping.
  *
  * @author Gunnar Morling
  */
+@Repeatable(Mappings.class)
 @Retention(RetentionPolicy.SOURCE)
 @Target(ElementType.METHOD)
-@Repeatable( Mappings.class )
 public @interface Mapping {
 
     /**
-     * The source to use for this Mapping. This can either be:
+     * The target name of the configured property as defined by the JavaBeans specification. If used to map an enum
+     * constant, the name of the constant member is to be given.
+     *
+     * @return The target name of the configured property or enum constant
+     */
+    String target();
+
+    /**
+     * The source to use for this mapping. This can either be:
      * <ol>
      * <li>The source name of the configured property as defined by the JavaBeans specification.</li>
      * <li>When used to map an enum constant, the name of the constant member is to be given.</li>
      * </ol>
-     * Either this attribute or {@link #constant()} or {@link #expression()} may be specified for a given mapping, but
+     * Either this attribute or {@link #constant()} or {@link #expression()} may be specified for a given mapping.
-     * not two at the same time. If this attribute is given, the target property must be specified via
-     * {@link #target()}.
      *
      * @return The source name of the configured property or enum constant.
      */
     String source() default "";
 
-    /**
-     * The target name of the configured property as defined by the JavaBeans specification. Defaults to the source name
-     * if not given. If used to map an enum constant, the name of the constant member is to be given.
-     *
-     * @return The target name of the configured property or enum constant
-     */
-    String target() default "";
-
     /**
      * A format string as processable by {@link SimpleDateFormat} if the attribute is mapped from {@code String} to
      * {@link Date} or vice-versa. Will be ignored for all other attribute types and when mapping enum constants.
@@ -72,32 +77,29 @@ public @interface Mapping {
      * property is not of type {@code String}, the value will be converted by applying a matching conversion method or
      * built-in conversion.
      * <p>
-     * Either this attribute or {@link #source()} or {@link #expression()} may be specified for a given mapping, but not
+     * Either this attribute or {@link #source()} or {@link #expression()} may be specified for a given mapping.
-     * two at the same time. If this attribute is given, the target property must be specified via {@link #target()}.
      *
      * @return A constant {@code String} constant specifying the value for the designated target property
      */
     String constant() default "";
 
     /**
-     * An expression {@link String} based on which the specified target property is to be set.
+     * An expression {@link String} based on which the specified target property is to be set. The format is determined
-     *
+     * by a type of expression. For instance:
-     * The format is determined by a type of expression. For instance:
      * {@code expression = "java(new org.example.TimeAndFormat( s.getTime(), s.getFormat() ))")} will insert the java
      * expression in the designated {@link #target()} property.
      * <p>
-     * Either this attribute or {@link #source()} or {@link #constant()} may be specified for a given mapping, but not
+     * Either this attribute or {@link #source()} or {@link #constant()} may be specified for a given mapping.
-     * two at the same time. If this attribute is given, the target property must be specified via {@link #target()}.
      *
      * @return A constant {@code String} constant specifying the value for the designated target property
      */
     String expression() default "";
 
     /**
-     * Whether the property specified via {@link #source()} or {@link #target()} should be ignored by the generated
+     * Whether the property specified via {@link #target()} should be ignored by the generated mapping method or not.
-     * mapping method or not. This can be useful when certain attributes should not be propagated from source or target
+     * This can be useful when certain attributes should not be propagated from source or target or when properties in
-     * or when properties in the target object are populated using a decorator and thus would be reported as unmapped
+     * the target object are populated using a decorator and thus would be reported as unmapped target property by
-     * target property by default.
+     * default.
      *
      * @return {@code true} if the given property should be ignored, {@code false} otherwise
      */
@@ -105,9 +107,8 @@ public @interface Mapping {
 
     /**
      * A qualifier can be specified to aid the selection process of a suitable mapper. This is useful in case multiple
-     * mappers (hand written of internal) qualify and result in an 'Ambiguous mapping methods found' error.
+     * mapping methods (hand written or generated) qualify and thus would result in an 'Ambiguous mapping methods found'
-     *
+     * error. A qualifier is a custom annotation and can be placed on a hand written mapper class or a method.
-     * A qualifier is a custom annotation and can be placed on either a hand written mapper class or a method.
      *
      * @return the qualifiers
      */

core/src/main/java/org/mapstruct/Mapping.java

@@ -28,6 +28,13 @@ import java.util.Date;
 
 /**
  * Configures the mapping of one bean attribute or enum constant.
+ * <p>
+ * The name of the mapped attribute or constant is to be specified via {@link #target()}. For mapped bean attributes it
+ * is assumed by default that the attribute has the same name in the source bean. Alternatively, one of
+ * {@link #source()}, {@link #expression()} or {@link #constant()} can be specified to define the property source.
+ * <p>
+ * In addition, the attributes {@link #dateFormat()} and {@link #qualifiedBy()} may be used to further define the
+ * mapping.
  *
  * @author Gunnar Morling
  */
@@ -36,27 +43,25 @@ import java.util.Date;
 public @interface Mapping {
 
     /**
-     * The source to use for this Mapping. This can either be:
+     * The target name of the configured property as defined by the JavaBeans specification. If used to map an enum
+     * constant, the name of the constant member is to be given.
+     *
+     * @return The target name of the configured property or enum constant
+     */
+    String target();
+
+    /**
+     * The source to use for this mapping. This can either be:
      * <ol>
      * <li>The source name of the configured property as defined by the JavaBeans specification.</li>
      * <li>When used to map an enum constant, the name of the constant member is to be given.</li>
      * </ol>
-     * Either this attribute or {@link #constant()} or {@link #expression()} may be specified for a given mapping,
+     * Either this attribute or {@link #constant()} or {@link #expression()} may be specified for a given mapping.
-     * but not two at the same time. If this attribute is given, the target property must be specified via
-     * {@link #target()}.
      *
      * @return The source name of the configured property or enum constant.
      */
     String source() default "";
 
-    /**
-     * The target name of the configured property as defined by the JavaBeans specification. Defaults to the source name
-     * if not given. If used to map an enum constant, the name of the constant member is to be given.
-     *
-     * @return The target name of the configured property or enum constant
-     */
-    String target() default "";
-
     /**
      * A format string as processable by {@link SimpleDateFormat} if the attribute is mapped from {@code String} to
      * {@link Date} or vice-versa. Will be ignored for all other attribute types and when mapping enum constants.
@@ -66,38 +71,33 @@ public @interface Mapping {
     String dateFormat() default "";
 
     /**
-     * A constant {@link String} based on which the specified target property is to be set. If the designated
+     * A constant {@link String} based on which the specified target property is to be set. If the designated target
-     * target property is not of type {@code String}, the value will be converted by applying a matching conversion
+     * property is not of type {@code String}, the value will be converted by applying a matching conversion method or
-     * method or built-in conversion.
+     * built-in conversion.
      * <p>
-     * Either this attribute or {@link #source()} or {@link #expression()} may be specified for a given mapping,
+     * Either this attribute or {@link #source()} or {@link #expression()} may be specified for a given mapping.
-     * but not two at the same time. If this attribute is given, the target property must be specified via
-     * {@link #target()}.
      *
      * @return A constant {@code String} constant specifying the value for the designated target property
      */
     String constant() default "";
 
     /**
-     * An expression {@link String} based on which the specified target property is to be set.
+     * An expression {@link String} based on which the specified target property is to be set. The format is determined
-     *
+     * by a type of expression. For instance:
-     * The format is determined by a type of expression. For instance:
      * {@code expression = "java(new org.example.TimeAndFormat( s.getTime(), s.getFormat() ))")} will insert the java
      * expression in the designated {@link #target()} property.
      * <p>
-     * Either this attribute or {@link #source()} or {@link #constant()} may be specified for a given mapping,
+     * Either this attribute or {@link #source()} or {@link #constant()} may be specified for a given mapping.
-     * but not two at the same time. If this attribute is given, the target property must be specified via
-     * {@link #target()}.
      *
      * @return A constant {@code String} constant specifying the value for the designated target property
      */
     String expression() default "";
 
     /**
-     * Whether the property specified via {@link #source()} or {@link #target()} should be ignored by the generated
+     * Whether the property specified via {@link #target()} should be ignored by the generated mapping method or not.
-     * mapping method or not. This can be useful when certain attributes should not be propagated from source or target
+     * This can be useful when certain attributes should not be propagated from source or target or when properties in
-     * or when properties in the target object are populated using a decorator and thus would be reported as unmapped
+     * the target object are populated using a decorator and thus would be reported as unmapped target property by
-     * target property by default.
+     * default.
      *
      * @return {@code true} if the given property should be ignored, {@code false} otherwise
      */
@@ -105,9 +105,8 @@ public @interface Mapping {
 
     /**
      * A qualifier can be specified to aid the selection process of a suitable mapper. This is useful in case multiple
-     * mappers (hand written of internal) qualify and result in an 'Ambiguous mapping methods found' error.
+     * mapping methods (hand written or generated) qualify and thus would result in an 'Ambiguous mapping methods found'
-     *
+     * error. A qualifier is a custom annotation and can be placed on a hand written mapper class or a method.
-     * A qualifier is a custom annotation and can be placed on either a hand written mapper class or a method.
      *
      * @return the qualifiers
      */

processor/src/main/java/org/mapstruct/ap/model/BeanMappingMethod.java

@@ -305,8 +305,7 @@ public class BeanMappingMethod extends MappingMethod {
                         }
 
                     }
-                    else if ( mappedProperty.getConstant().isEmpty()
+                    else if ( mappedProperty.getSourcePropertyName() != null
-                        && mappedProperty.getJavaExpression().isEmpty()
                         && !hasSourceProperty( mappedProperty.getSourcePropertyName() ) ) {
                         ctx.getMessager().printMessage(
                             Diagnostic.Kind.ERROR,

processor/src/main/java/org/mapstruct/ap/model/PropertyMapping.java

@@ -111,7 +111,8 @@ public class PropertyMapping extends ModelElement {
             if ( mapping != null ) {
                 dateFormat = mapping.getDateFormat();
                 qualifiers = mapping.getQualifiers();
-                sourcePropertyName = mapping.getSourcePropertyName();
+                sourcePropertyName =
+                    mapping.getSourcePropertyName() == null ? targetPropertyName : mapping.getSourcePropertyName();
             }
             else {
                 sourcePropertyName = targetPropertyName;
@@ -121,18 +122,7 @@ public class PropertyMapping extends ModelElement {
 
             // then iterate over source accessors (assuming the source is a bean)
             for ( ExecutableElement sourceAccessor : sourceGetters ) {
-
+                if ( Executables.getPropertyName( sourceAccessor ).equals( sourcePropertyName ) ) {
-                List<Mapping> sourceMappings = method.getMappings().get( sourcePropertyName );
-                if ( method.getMappings().containsKey( sourcePropertyName ) ) {
-                    for ( Mapping sourceMapping : sourceMappings ) {
-                        boolean mapsToOtherTarget = !sourceMapping.getTargetName().equals( targetPropertyName );
-                        if ( Executables.getPropertyName( sourceAccessor ).equals( sourcePropertyName )
-                            && !mapsToOtherTarget ) {
-                            return getPropertyMapping( sourceAccessor, dateFormat, qualifiers );
-                        }
-                    }
-                }
-                else if ( Executables.getPropertyName( sourceAccessor ).equals( sourcePropertyName ) ) {
                     return getPropertyMapping( sourceAccessor, dateFormat, qualifiers );
                 }
             }

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

@@ -24,7 +24,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-
 import javax.annotation.processing.Messager;
 import javax.lang.model.element.AnnotationMirror;
 import javax.lang.model.element.AnnotationValue;
@@ -85,18 +84,7 @@ public class Mapping {
             mappingPrism.values.source()
         );
 
-        if ( mappingPrism.source().isEmpty() &&
+        if ( !mappingPrism.source().isEmpty() && !mappingPrism.constant().isEmpty() ) {
-            mappingPrism.constant().isEmpty() &&
-            mappingPrism.expression().isEmpty() &&
-            !mappingPrism.ignore() ) {
-            messager.printMessage(
-                Diagnostic.Kind.ERROR,
-                "Either define a source, a constant or an expression in a Mapping",
-                element
-            );
-            return null;
-        }
-        else if ( !mappingPrism.source().isEmpty() && !mappingPrism.constant().isEmpty() ) {
             messager.printMessage(
                 Diagnostic.Kind.ERROR,
                 "Source and constant are both defined in Mapping, either define a source or a constant",
@@ -120,10 +108,12 @@ public class Mapping {
             );
             return null;
         }
+
+        String source = mappingPrism.source().isEmpty() ? null : mappingPrism.source();
         return new Mapping(
-            mappingPrism.source(),
+            source,
             sourceNameParts != null ? sourceNameParts[0] : null,
-            sourceNameParts != null ? sourceNameParts[1] : mappingPrism.source(),
+            sourceNameParts != null ? sourceNameParts[1] : source,
             mappingPrism.constant(),
             mappingPrism.expression(),
             mappingPrism.target(),
@@ -167,7 +157,7 @@ public class Mapping {
         this.expression = expression;
         Matcher javaExpressionMatcher = JAVA_EXPRESSION.matcher( expression );
         this.javaExpression = javaExpressionMatcher.matches() ? javaExpressionMatcher.group( 1 ).trim() : "";
-        this.targetName = targetName.equals( "" ) ? sourceName : targetName;
+        this.targetName = targetName;
         this.dateFormat = dateFormat;
         this.qualifiers = qualifiers;
         this.isIgnored = isIgnored;
@@ -246,12 +236,12 @@ public class Mapping {
         // mapping can only be reversed if the source was not a constant nor an expression
         if ( constant.isEmpty() && expression.isEmpty() ) {
             reverse = new Mapping(
-                targetName,
+                sourceName != null ? targetName : null,
                 null,
-                targetName,
+                sourceName != null ? targetName : null,
                 constant,
                 expression,
-                sourceName,
+                sourceName != null ? sourceName : targetName,
                 dateFormat,
                 qualifiers,
                 isIgnored,

processor/src/test/java/org/mapstruct/ap/test/builtin/mapper/CalendarToStringMapper.java

@@ -29,6 +29,6 @@ public interface CalendarToStringMapper {
 
     CalendarToStringMapper INSTANCE = Mappers.getMapper( CalendarToStringMapper.class );
 
-    @Mapping( source = "prop", dateFormat = "dd.MM.yyyy" )
+    @Mapping( target = "prop", dateFormat = "dd.MM.yyyy" )
     StringProperty map( CalendarProperty source );
 }

processor/src/test/java/org/mapstruct/ap/test/builtin/mapper/StringToCalendarMapper.java

@@ -29,6 +29,6 @@ public interface StringToCalendarMapper {
 
     StringToCalendarMapper INSTANCE = Mappers.getMapper( StringToCalendarMapper.class );
 
-    @Mapping( source = "prop", dateFormat = "dd.MM.yyyy" )
+    @Mapping( target = "prop", dateFormat = "dd.MM.yyyy" )
     CalendarProperty map( StringProperty source);
 }

processor/src/test/java/org/mapstruct/ap/test/builtin/mapper/StringToXmlGregCalMapper.java

@@ -31,7 +31,7 @@ public interface StringToXmlGregCalMapper {
 
     XmlGregorianCalendarProperty map(StringProperty source);
 
-    @Mapping(source = "prop", dateFormat = "dd.MM.yyyy")
+    @Mapping(target = "prop", dateFormat = "dd.MM.yyyy")
     XmlGregorianCalendarProperty mapAndFormat(StringProperty source);
 
 }

processor/src/test/java/org/mapstruct/ap/test/builtin/mapper/XmlGregCalToStringMapper.java

@@ -31,7 +31,7 @@ public interface XmlGregCalToStringMapper {
 
     StringProperty map(XmlGregorianCalendarProperty source);
 
-    @Mapping(source = "prop", dateFormat = "dd.MM.yyyy")
+    @Mapping(target = "prop", dateFormat = "dd.MM.yyyy")
     StringProperty mapAndFormat(XmlGregorianCalendarProperty source);
 
 }

processor/src/test/java/org/mapstruct/ap/test/conversion/date/SourceTargetMapper.java

@@ -21,10 +21,10 @@ package org.mapstruct.ap.test.conversion.date;
 import java.util.Date;
 import java.util.List;
 
+import org.mapstruct.InheritInverseConfiguration;
 import org.mapstruct.IterableMapping;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
-import org.mapstruct.InheritInverseConfiguration;
 import org.mapstruct.factory.Mappers;
 
 @Mapper
@@ -32,13 +32,15 @@ public interface SourceTargetMapper {
 
     SourceTargetMapper INSTANCE = Mappers.getMapper( SourceTargetMapper.class );
 
-    @Mapping(source = "date", dateFormat = "dd.MM.yyyy")
+    @Mapping(target = "date", dateFormat = "dd.MM.yyyy")
     Target sourceToTarget(Source source);
+
     @InheritInverseConfiguration
     Source targetToSource(Target target);
 
     @IterableMapping(dateFormat = "dd.MM.yyyy")
     List<String> stringListToDateList(List<Date> dates);
+
     @InheritInverseConfiguration
     List<Date> dateListToStringList(List<String> strings);
 }

processor/src/test/java/org/mapstruct/ap/test/conversion/java8time/SourceTargetMapper.java

@@ -39,46 +39,46 @@ public interface SourceTargetMapper {
     String LOCAL_TIME_FORMAT = "HH:mm";
 
     SourceTargetMapper INSTANCE = Mappers.getMapper( SourceTargetMapper.class );
-    @Mappings( { @Mapping( source = "zonedDateTime", dateFormat = DATE_TIME_FORMAT ),
+    @Mappings( { @Mapping( target = "zonedDateTime", dateFormat = DATE_TIME_FORMAT ),
-                    @Mapping( source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT ),
+                    @Mapping( target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT ),
-                    @Mapping( source = "localDate", dateFormat = LOCAL_DATE_FORMAT ),
+                    @Mapping( target = "localDate", dateFormat = LOCAL_DATE_FORMAT ),
-                    @Mapping( source = "localTime", dateFormat = LOCAL_TIME_FORMAT ) } )
+                    @Mapping( target = "localTime", dateFormat = LOCAL_TIME_FORMAT ) } )
     Target sourceToTarget(Source source);
 
-    @Mappings( { @Mapping( source = "zonedDateTime", dateFormat = DATE_TIME_FORMAT ),
+    @Mappings( { @Mapping( target = "zonedDateTime", dateFormat = DATE_TIME_FORMAT ),
-                    @Mapping( source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT ),
+                    @Mapping( target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT ),
-                    @Mapping( source = "localDate", dateFormat = LOCAL_DATE_FORMAT ),
+                    @Mapping( target = "localDate", dateFormat = LOCAL_DATE_FORMAT ),
-                    @Mapping( source = "localTime", dateFormat = LOCAL_TIME_FORMAT ) } )
+                    @Mapping( target = "localTime", dateFormat = LOCAL_TIME_FORMAT ) } )
     Target sourceToTargetDefaultMapping(Source source);
 
-    @Mapping( source = "zonedDateTime", dateFormat = DATE_TIME_FORMAT )
+    @Mapping( target = "zonedDateTime", dateFormat = DATE_TIME_FORMAT )
     Target sourceToTargetDateTimeMapped(Source source);
 
-    @Mapping( source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT )
+    @Mapping( target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT )
     Target sourceToTargetLocalDateTimeMapped(Source source);
 
-    @Mapping( source = "localDate", dateFormat = LOCAL_DATE_FORMAT )
+    @Mapping( target = "localDate", dateFormat = LOCAL_DATE_FORMAT )
     Target sourceToTargetLocalDateMapped(Source source);
 
-    @Mapping( source = "localTime", dateFormat = LOCAL_TIME_FORMAT )
+    @Mapping( target = "localTime", dateFormat = LOCAL_TIME_FORMAT )
     Target sourceToTargetLocalTimeMapped(Source source);
 
-    @Mappings( { @Mapping( source = "zonedDateTime", dateFormat = DATE_TIME_FORMAT ),
+    @Mappings( { @Mapping( target = "zonedDateTime", dateFormat = DATE_TIME_FORMAT ),
-                    @Mapping( source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT ),
+                    @Mapping( target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT ),
-                    @Mapping( source = "localDate", dateFormat = LOCAL_DATE_FORMAT ),
+                    @Mapping( target = "localDate", dateFormat = LOCAL_DATE_FORMAT ),
-                    @Mapping( source = "localTime", dateFormat = LOCAL_TIME_FORMAT ) } )
+                    @Mapping( target = "localTime", dateFormat = LOCAL_TIME_FORMAT ) } )
     Source targetToSource(Target target);
 
-    @Mapping( source = "zonedDateTime", dateFormat = DATE_TIME_FORMAT )
+    @Mapping( target = "zonedDateTime", dateFormat = DATE_TIME_FORMAT )
     Source targetToSourceDateTimeMapped(Target target);
 
-    @Mapping( source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT )
+    @Mapping( target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT )
     Source targetToSourceLocalDateTimeMapped(Target target);
 
-    @Mapping( source = "localDate", dateFormat = LOCAL_DATE_FORMAT )
+    @Mapping( target = "localDate", dateFormat = LOCAL_DATE_FORMAT )
     Source targetToSourceLocalDateMapped(Target target);
 
-    @Mapping( source = "localTime", dateFormat = LOCAL_TIME_FORMAT )
+    @Mapping( target = "localTime", dateFormat = LOCAL_TIME_FORMAT )
     Source targetToSourceLocalTimeMapped(Target target);
 
     @InheritInverseConfiguration( name = "sourceToTarget" )

processor/src/test/java/org/mapstruct/ap/test/conversion/jodatime/SourceTargetMapper.java

@@ -38,47 +38,46 @@ public interface SourceTargetMapper {
     SourceTargetMapper INSTANCE = Mappers.getMapper( SourceTargetMapper.class );
 
     @Mappings({
-        @Mapping(source = "dateTime", dateFormat = DATE_TIME_FORMAT),
+        @Mapping(target = "dateTime", dateFormat = DATE_TIME_FORMAT),
-        @Mapping(source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT),
+        @Mapping(target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT),
-        @Mapping(source = "localDate", dateFormat = LOCAL_DATE_FORMAT),
+        @Mapping(target = "localDate", dateFormat = LOCAL_DATE_FORMAT),
-        @Mapping(source = "localTime", dateFormat = LOCAL_TIME_FORMAT)
+        @Mapping(target = "localTime", dateFormat = LOCAL_TIME_FORMAT)
     })
     Target sourceToTarget(Source source);
 
     @InheritInverseConfiguration( name = "targetToSource" ) // TODO: FIXME
     Target sourceToTargetDefaultMapping(Source source);
 
-    @Mapping(source = "dateTime", dateFormat = DATE_TIME_FORMAT)
+    @Mapping(target = "dateTime", dateFormat = DATE_TIME_FORMAT)
     Target sourceToTargetDateTimeMapped(Source source);
 
-    @Mapping(source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT)
+    @Mapping(target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT)
     Target sourceToTargetLocalDateTimeMapped(Source source);
 
-    @Mapping(source = "localDate", dateFormat = LOCAL_DATE_FORMAT)
+    @Mapping(target = "localDate", dateFormat = LOCAL_DATE_FORMAT)
     Target sourceToTargetLocalDateMapped(Source source);
 
-    @Mapping(source = "localTime", dateFormat = LOCAL_TIME_FORMAT)
+    @Mapping(target = "localTime", dateFormat = LOCAL_TIME_FORMAT)
     Target sourceToTargetLocalTimeMapped(Source source);
 
-
     @Mappings({
-        @Mapping(source = "dateTime", dateFormat = DATE_TIME_FORMAT),
+        @Mapping(target = "dateTime", dateFormat = DATE_TIME_FORMAT),
-        @Mapping(source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT),
+        @Mapping(target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT),
-        @Mapping(source = "localDate", dateFormat = LOCAL_DATE_FORMAT),
+        @Mapping(target = "localDate", dateFormat = LOCAL_DATE_FORMAT),
-        @Mapping(source = "localTime", dateFormat = LOCAL_TIME_FORMAT)
+        @Mapping(target = "localTime", dateFormat = LOCAL_TIME_FORMAT)
     })
     Source targetToSource(Target target);
 
-    @Mapping(source = "dateTime", dateFormat = DATE_TIME_FORMAT)
+    @Mapping(target = "dateTime", dateFormat = DATE_TIME_FORMAT)
     Source targetToSourceDateTimeMapped(Target target);
 
-    @Mapping(source = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT)
+    @Mapping(target = "localDateTime", dateFormat = LOCAL_DATE_TIME_FORMAT)
     Source targetToSourceLocalDateTimeMapped(Target target);
 
-    @Mapping(source = "localDate", dateFormat = LOCAL_DATE_FORMAT)
+    @Mapping(target = "localDate", dateFormat = LOCAL_DATE_FORMAT)
     Source targetToSourceLocalDateMapped(Target target);
 
-    @Mapping(source = "localTime", dateFormat = LOCAL_TIME_FORMAT)
+    @Mapping(target = "localTime", dateFormat = LOCAL_TIME_FORMAT)
     Source targetToSourceLocalTimeMapped(Target target);
 
     @InheritInverseConfiguration( name = "sourceToTarget" ) // TODO: FIXME

processor/src/test/java/org/mapstruct/ap/test/conversion/string/SourceTargetMapper.java

@@ -27,7 +27,7 @@ public interface SourceTargetMapper {
 
     SourceTargetMapper INSTANCE = Mappers.getMapper( SourceTargetMapper.class );
 
-    @Mapping( source = "object", ignore = true )
+    @Mapping( target = "object", ignore = true )
     Target sourceToTarget(Source source);
 
     Source targetToSource(Target target);

processor/src/test/java/org/mapstruct/ap/test/ignore/AnimalMapper.java

@@ -18,10 +18,9 @@
  */
 package org.mapstruct.ap.test.ignore;
 
+import org.mapstruct.InheritInverseConfiguration;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
-import org.mapstruct.Mappings;
-import org.mapstruct.InheritInverseConfiguration;
 import org.mapstruct.factory.Mappers;
 
 @Mapper
@@ -29,11 +28,9 @@ public interface AnimalMapper {
 
     AnimalMapper INSTANCE = Mappers.getMapper( AnimalMapper.class );
 
-    @Mappings({
-        @Mapping(source = "size", ignore = true),
     @Mapping(target = "age", ignore = true)
-    })
     AnimalDto animalToDto(Animal animal);
+
     @InheritInverseConfiguration
     Animal animalDtoToAnimal(AnimalDto animalDto);
 }

processor/src/test/java/org/mapstruct/ap/test/ignore/IgnorePropertyTest.java

@@ -18,14 +18,14 @@
  */
 package org.mapstruct.ap.test.ignore;
 
+import static org.fest.assertions.Assertions.assertThat;
+
 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;
-
 /**
  * Test for ignoring properties during the mapping.
  *
@@ -35,18 +35,6 @@ import static org.fest.assertions.Assertions.assertThat;
 @RunWith(AnnotationProcessorTestRunner.class)
 public class IgnorePropertyTest {
 
-    @Test
-    @IssueKey("72")
-    public void shouldNotPropagateIgnoredPropertyGivenViaSourceAttribute() {
-        Animal animal = new Animal( "Bruno", 100, 23 );
-
-        AnimalDto animalDto = AnimalMapper.INSTANCE.animalToDto( animal );
-
-        assertThat( animalDto ).isNotNull();
-        assertThat( animalDto.getName() ).isEqualTo( "Bruno" );
-        assertThat( animalDto.getSize() ).isNull();
-    }
-
     @Test
     @IssueKey("72")
     public void shouldNotPropagateIgnoredPropertyGivenViaTargetAttribute() {

processor/src/test/java/org/mapstruct/ap/test/selection/qualifier/ErroneousMapper.java

@@ -18,12 +18,12 @@
  */
 package org.mapstruct.ap.test.selection.qualifier;
 
-import org.mapstruct.ap.test.selection.qualifier.bean.GermanRelease;
-import org.mapstruct.ap.test.selection.qualifier.bean.OriginalRelease;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
 import org.mapstruct.Mappings;
 import org.mapstruct.ap.test.selection.qualifier.annotation.NonQualifierAnnotated;
+import org.mapstruct.ap.test.selection.qualifier.bean.GermanRelease;
+import org.mapstruct.ap.test.selection.qualifier.bean.OriginalRelease;
 import org.mapstruct.ap.test.selection.qualifier.handwritten.SomeOtherMapper;
 import org.mapstruct.ap.test.selection.qualifier.handwritten.YetAnotherMapper;
 import org.mapstruct.factory.Mappers;
@@ -38,7 +38,7 @@ public interface ErroneousMapper {
     ErroneousMapper INSTANCE = Mappers.getMapper( ErroneousMapper.class );
 
     @Mappings( {
-        @Mapping( source = "title", qualifiedBy = { NonQualifierAnnotated.class } ), } )
+        @Mapping( target = "title", qualifiedBy = { NonQualifierAnnotated.class } ), } )
     GermanRelease toGerman( OriginalRelease movies );
 
 }

processor/src/test/java/org/mapstruct/ap/test/selection/qualifier/MovieMapper.java

@@ -18,15 +18,15 @@
  */
 package org.mapstruct.ap.test.selection.qualifier;
 
-import org.mapstruct.ap.test.selection.qualifier.bean.GermanRelease;
-import org.mapstruct.ap.test.selection.qualifier.bean.OriginalRelease;
-import org.mapstruct.ap.test.selection.qualifier.handwritten.Titles;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
 import org.mapstruct.Mappings;
 import org.mapstruct.ap.test.selection.qualifier.annotation.EnglishToGerman;
 import org.mapstruct.ap.test.selection.qualifier.annotation.TitleTranslator;
+import org.mapstruct.ap.test.selection.qualifier.bean.GermanRelease;
+import org.mapstruct.ap.test.selection.qualifier.bean.OriginalRelease;
 import org.mapstruct.ap.test.selection.qualifier.handwritten.SomeOtherMapper;
+import org.mapstruct.ap.test.selection.qualifier.handwritten.Titles;
 import org.mapstruct.factory.Mappers;
 
 /**
@@ -39,7 +39,7 @@ public interface MovieMapper {
     MovieMapper INSTANCE = Mappers.getMapper( MovieMapper.class );
 
     @Mappings( {
-        @Mapping( source = "title", qualifiedBy = { TitleTranslator.class, EnglishToGerman.class } ),
+        @Mapping( target = "title", qualifiedBy = { TitleTranslator.class, EnglishToGerman.class } )
     } )
     GermanRelease toGerman( OriginalRelease movies );
 

processor/src/test/java/org/mapstruct/ap/test/source/constants/SourceConstantsTest.java

@@ -18,10 +18,13 @@
  */
 package org.mapstruct.ap.test.source.constants;
 
+import static org.fest.assertions.Assertions.assertThat;
+
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Arrays;
 import java.util.Date;
+
 import javax.tools.Diagnostic.Kind;
 
 import org.junit.Test;
@@ -33,8 +36,6 @@ import org.mapstruct.ap.testutil.compilation.annotation.Diagnostic;
 import org.mapstruct.ap.testutil.compilation.annotation.ExpectedCompilationOutcome;
 import org.mapstruct.ap.testutil.runner.AnnotationProcessorTestRunner;
 
-import static org.fest.assertions.Assertions.assertThat;
-
 /**
  * @author Sjaak Derksen
  */
@@ -159,31 +160,6 @@ public class SourceConstantsTest {
     public void errorOnSourceAndExpression() throws ParseException {
     }
 
-    @Test
-    @IssueKey("187")
-    @WithClasses({
-        Source.class,
-        Target.class,
-        ErroneousMapper2.class,
-        StringListMapper.class
-    })
-    @ExpectedCompilationOutcome(
-        value = CompilationResult.FAILED,
-        diagnostics = {
-            @Diagnostic(type = ErroneousMapper2.class,
-                kind = Kind.ERROR,
-                line = 41,
-                messageRegExp = "Either define a source, a constant or an expression in a Mapping"),
-            @Diagnostic(type = ErroneousMapper2.class,
-                kind = Kind.WARNING,
-                line = 41,
-                messageRegExp = "Unmapped target property: \"integerConstant\"")
-        }
-    )
-    public void errorOnNeitherSourceNorExpression() throws ParseException {
-    }
-
-
     @Test
     @IssueKey("255")
     @WithClasses({