#253, #254 do not collect methods that override Object#equals(Object) or that are overridden by an already collected method from a sub type

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

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+
 import javax.annotation.processing.Messager;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.ExecutableElement;
@@ -30,6 +31,7 @@ import javax.lang.model.element.TypeElement;
 import javax.lang.model.type.DeclaredType;
 import javax.lang.model.type.TypeKind;
 import javax.lang.model.type.TypeMirror;
+import javax.lang.model.util.Elements;
 import javax.lang.model.util.Types;
 import javax.tools.Diagnostic.Kind;
 
@@ -62,12 +64,16 @@ public class MethodRetrievalProcessor implements ModelElementProcessor<Void, Lis
     private Messager messager;
     private TypeFactory typeFactory;
     private Types typeUtils;
+    private Elements elementUtils;
+    private TypeMirror javaLangObjectTypeMirror;
 
     @Override
     public List<SourceMethod> process(ProcessorContext context, TypeElement mapperTypeElement, Void sourceModel) {
         this.messager = context.getMessager();
         this.typeFactory = context.getTypeFactory();
         this.typeUtils = context.getTypeUtils();
+        this.elementUtils = context.getElementUtils();
+        this.javaLangObjectTypeMirror = typeFactory.getType( Object.class ).getTypeMirror();
         return retrieveMethods( mapperTypeElement, mapperTypeElement );
     }
 
@@ -88,9 +94,11 @@ public class MethodRetrievalProcessor implements ModelElementProcessor<Void, Lis
         List<SourceMethod> methods = new ArrayList<SourceMethod>();
 
         for ( ExecutableElement executable : methodsIn( allEnclosingElementsIncludeSuper( usedMapper ) ) ) {
-            SourceMethod method = getMethod( usedMapper, executable, mapperToImplement );
+            if ( isNotObjectEquals( executable ) && wasNotYetOverridden( methods, executable ) ) {
-            if ( method != null ) {
+                SourceMethod method = getMethod( usedMapper, executable, mapperToImplement );
-                methods.add( method );
+                if ( method != null ) {
+                    methods.add( method );
+                }
             }
         }
 
@@ -111,6 +119,38 @@ public class MethodRetrievalProcessor implements ModelElementProcessor<Void, Lis
         return methods;
     }
 
+    /**
+     * @param executable the executable to check
+     * @return <code>true</code>, iff the executable does not represent {@link java.lang.Object#equals(Object)} or an
+     *         overridden version of it
+     */
+    private boolean isNotObjectEquals(ExecutableElement executable) {
+        if ( "equals".equals( executable.getSimpleName().toString() )
+            && executable.getParameters().size() == 1
+            && executable.getParameters().get( 0 ).asType().equals( javaLangObjectTypeMirror ) ) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * @param methods the list of already collected methods of one type hierarchy (order is from sub-types to
+     *            super-types)
+     * @param executable the method to check
+     * @return <code>true</code>, iff the given executable was not yet overridden by a method in the given list.
+     */
+    private boolean wasNotYetOverridden(List<SourceMethod> methods, ExecutableElement executable) {
+        for ( SourceMethod alreadyAdded : methods ) {
+            ExecutableElement executableInSubtype = alreadyAdded.getExecutable();
+            TypeElement declaringType = (TypeElement) executableInSubtype.getEnclosingElement();
+
+            if ( elementUtils.overrides( executableInSubtype, executable, declaringType ) ) {
+                return false;
+            }
+        }
+        return true;
+    }
+
     private TypeElement asTypeElement(TypeMirror usedMapper) {
         return (TypeElement) ( (DeclaredType) usedMapper ).asElement();
     }

processor/src/test/java/org/mapstruct/ap/test/abstractclass/AbstractClassTest.java

@@ -18,21 +18,24 @@
  */
 package org.mapstruct.ap.test.abstractclass;
 
-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 the generation of implementation of abstract base classes.
  *
  * @author Gunnar Morling
  */
 @WithClasses( { Source.class, Target.class, SourceTargetMapper.class, AbstractBaseMapper.class,
-    BaseMapperInterface.class } )
+    BaseMapperInterface.class,
+    ReferencedMapper.class,
+    AbstractReferencedMapper.class,
+    ReferencedMapperInterface.class } )
 @RunWith( AnnotationProcessorTestRunner.class )
 public class AbstractClassTest {
 
@@ -63,6 +66,8 @@ public class AbstractClassTest {
     private void assertResult(Target target) {
         assertThat( target ).isNotNull();
         assertThat( target.getSize() ).isEqualTo( Long.valueOf( 181 ) );
-        assertThat( target.getBirthday() ).isEqualTo( "26.04.1948" );
+        assertThat( target.getBirthday() ).isEqualTo( "Birthday: 26.04.1948" );
+        assertThat( target.getManuallyConverted() ).isEqualTo( 42 );
+        assertThat( target.isNotAttractingEqualsMethod() ).isTrue();
     }
 }

processor/src/test/java/org/mapstruct/ap/test/abstractclass/AbstractReferencedMapper.java

@@ -0,0 +1,50 @@
+/**
+ *  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.abstractclass;
+
+import javax.xml.ws.Holder;
+
+/**
+ * @author Andreas Gudian
+ *
+ */
+public abstract class AbstractReferencedMapper implements ReferencedMapperInterface {
+    @Override
+    public int holderToInt(Holder<String> holder) {
+        return 41;
+    }
+
+    public boolean objectToBoolean(Object obj) {
+        if ( obj instanceof String ) {
+            return true;
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return super.equals( obj );
+    }
+
+    @Override
+    public int hashCode() {
+        return super.hashCode();
+    }
+}

processor/src/test/java/org/mapstruct/ap/test/abstractclass/ReferencedMapper.java

@@ -0,0 +1,32 @@
+/**
+ *  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.abstractclass;
+
+import javax.xml.ws.Holder;
+
+/**
+ * @author Andreas Gudian
+ *
+ */
+public class ReferencedMapper extends AbstractReferencedMapper {
+    @Override
+    public int holderToInt(Holder<String> holder) {
+        return 42;
+    }
+}

processor/src/test/java/org/mapstruct/ap/test/abstractclass/ReferencedMapperInterface.java

@@ -0,0 +1,29 @@
+/**
+ *  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.abstractclass;
+
+import javax.xml.ws.Holder;
+
+/**
+ * @author Andreas Gudian
+ *
+ */
+public interface ReferencedMapperInterface {
+    int holderToInt(Holder<String> holder);
+}

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

@@ -20,10 +20,14 @@ package org.mapstruct.ap.test.abstractclass;
 
 import java.util.Calendar;
 
+import javax.xml.ws.Holder;
+
 public class Source {
 
     private final int size;
     private final Calendar birthday;
+    private final String notAttractingEqualsMethod = "no way";
+    private final Holder<String> manuallyConverted = new Holder<String>("What is the answer?");
 
     public Source() {
         size = 181;
@@ -38,4 +42,12 @@ public class Source {
     public Calendar getBirthday() {
         return birthday;
     }
+
+    public String getNotAttractingEqualsMethod() {
+        return notAttractingEqualsMethod;
+    }
+
+    public Holder<String> getManuallyConverted() {
+        return manuallyConverted;
+    }
 }

processor/src/test/java/org/mapstruct/ap/test/abstractclass/SourceTargetMapper.java

@@ -25,7 +25,7 @@ import java.util.Calendar;
 import org.mapstruct.Mapper;
 import org.mapstruct.factory.Mappers;
 
-@Mapper
+@Mapper( uses = ReferencedMapper.class )
 public abstract class SourceTargetMapper extends AbstractBaseMapper {
 
     public static final SourceTargetMapper INSTANCE = Mappers.getMapper( SourceTargetMapper.class );
@@ -34,6 +34,6 @@ public abstract class SourceTargetMapper extends AbstractBaseMapper {
 
     protected String calendarToString(Calendar calendar) {
         DateFormat format = new SimpleDateFormat( "dd.MM.yyyy" );
-        return format.format( calendar.getTime() );
+        return "Birthday: " + format.format( calendar.getTime() );
     }
 }

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

@@ -22,6 +22,8 @@ public class Target {
 
     private Long size;
     private String birthday;
+    private boolean notAttractingEqualsMethod;
+    private int manuallyConverted;
 
     public Long getSize() {
         return size;
@@ -38,4 +40,20 @@ public class Target {
     public void setBirthday(String birthday) {
         this.birthday = birthday;
     }
+
+    public boolean isNotAttractingEqualsMethod() {
+        return notAttractingEqualsMethod;
+    }
+
+    public void setNotAttractingEqualsMethod(boolean notAttractingEqualsMethod) {
+        this.notAttractingEqualsMethod = notAttractingEqualsMethod;
+    }
+
+    public int getManuallyConverted() {
+        return manuallyConverted;
+    }
+
+    public void setManuallyConverted(int manuallyConverted) {
+        this.manuallyConverted = manuallyConverted;
+    }
 }