/*
* Copyright 2014 Lukas Krejci
*
* 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.revapi.java.checks.annotations;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.AnnotationValue;
import javax.lang.model.element.ExecutableElement;
import org.revapi.Difference;
import org.revapi.java.spi.CheckBase;
import org.revapi.java.spi.Code;
import org.revapi.java.spi.JavaAnnotationElement;
import org.revapi.java.spi.Util;
/**
* @author Lukas Krejci
* @since 0.1
*/
public final class AttributeValueChanged extends CheckBase {
@Override
protected List<Difference> doVisitAnnotation(JavaAnnotationElement oldElement,
JavaAnnotationElement newElement) {
if (oldElement == null || newElement == null) {
return null;
}
AnnotationMirror oldAnnotation = oldElement.getAnnotation();
AnnotationMirror newAnnotation = newElement.getAnnotation();
List<Difference> result = new ArrayList<>();
Map<String, Map.Entry<? extends ExecutableElement, ? extends AnnotationValue>> oldAttrs = Util
.keyAnnotationAttributesByName(oldAnnotation.getElementValues());
Map<String, Map.Entry<? extends ExecutableElement, ? extends AnnotationValue>> newAttrs = Util
.keyAnnotationAttributesByName(newAnnotation.getElementValues());
for (Map.Entry<String, Map.Entry<? extends ExecutableElement, ? extends AnnotationValue>> oldE : oldAttrs
.entrySet()) {
String name = oldE.getKey();
Map.Entry<? extends ExecutableElement, ? extends AnnotationValue> oldValue = oldE.getValue();
Map.Entry<? extends ExecutableElement, ? extends AnnotationValue> newValue = newAttrs.get(name);
if (newValue == null) {
result.add(
createDifference(Code.ANNOTATION_ATTRIBUTE_REMOVED, Code.attachmentsFor(oldElement, newElement,
"attribute", name,
"value", Util.toHumanReadableString(oldValue.getValue())))
);
} else if (!Util.isEqual(oldValue.getValue(), newValue.getValue())) {
result.add(createDifference(Code.ANNOTATION_ATTRIBUTE_VALUE_CHANGED,
Code.attachmentsFor(oldElement, newElement,
"attribute", name,
"oldValue", Util.toHumanReadableString(oldValue.getValue()),
"newValue", Util.toHumanReadableString(newValue.getValue()))
));
}
newAttrs.remove(name);
}
for (Map.Entry<String, Map.Entry<? extends ExecutableElement, ? extends AnnotationValue>> newE : newAttrs
.entrySet()) {
String name = newE.getKey();
Map.Entry<? extends ExecutableElement, ? extends AnnotationValue> newValue = newE.getValue();
Map.Entry<? extends ExecutableElement, ? extends AnnotationValue> oldValue = oldAttrs.get(name);
if (oldValue == null) {
result.add(
createDifference(Code.ANNOTATION_ATTRIBUTE_ADDED, Code.attachmentsFor(oldElement, newElement,
"attribute", name,
"value", Util.toHumanReadableString(newValue.getValue())))
);
}
}
return result.isEmpty() ? null : result;
}
@Override
public EnumSet<Type> getInterest() {
return EnumSet.of(Type.ANNOTATION);
}
}