/*
* 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.generics;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Nullable;
import javax.lang.model.type.TypeMirror;
import org.revapi.Difference;
import org.revapi.java.spi.CheckBase;
import org.revapi.java.spi.Code;
import org.revapi.java.spi.JavaTypeElement;
import org.revapi.java.spi.Util;
/**
* @author Lukas Krejci
* @since 0.1
*/
public class SuperTypeParametersChanged extends CheckBase {
@Override
public EnumSet<Type> getInterest() {
return EnumSet.of(Type.CLASS);
}
@Override
protected void doVisitClass(@Nullable JavaTypeElement oldType, @Nullable JavaTypeElement newType) {
if (!isBothAccessible(oldType, newType)) {
return;
}
List<? extends TypeMirror> oldSuperTypes = getOldTypeEnvironment().getTypeUtils().directSupertypes(
oldType.getModelRepresentation());
List<? extends TypeMirror> newSuperTypes = getNewTypeEnvironment().getTypeUtils().directSupertypes(
newType.getModelRepresentation());
if (oldSuperTypes.size() != newSuperTypes.size()) {
//super types changed, handled elsewhere
return;
}
Map<String, TypeMirror> erasedOld = new LinkedHashMap<>();
Map<String, TypeMirror> erasedNew = new LinkedHashMap<>();
for (TypeMirror t : oldSuperTypes) {
erasedOld.put(Util.toUniqueString(getOldTypeEnvironment().getTypeUtils().erasure(t)), t);
}
for (TypeMirror t : newSuperTypes) {
erasedNew.put(Util.toUniqueString(getNewTypeEnvironment().getTypeUtils().erasure(t)), t);
}
if (!erasedOld.keySet().equals(erasedNew.keySet())) {
//super types changed, handled elsewhere
return;
}
Map<TypeMirror, TypeMirror> changed = new LinkedHashMap<>();
for (Map.Entry<String, TypeMirror> e : erasedOld.entrySet()) {
TypeMirror oldT = e.getValue();
TypeMirror newT = erasedNew.get(e.getKey());
String oldS = Util.toUniqueString(oldT);
String newS = Util.toUniqueString(newT);
if (!oldS.equals(newS)) {
changed.put(oldT, newT);
}
}
if (!changed.isEmpty()) {
pushActive(oldType, newType, changed);
}
}
@Nullable
@Override
protected List<Difference> doEnd() {
ActiveElements<JavaTypeElement> types = popIfActive();
if (types == null) {
return null;
}
@SuppressWarnings("unchecked")
Map<TypeMirror, TypeMirror> changed = (Map<TypeMirror, TypeMirror>) types.context[0];
List<Difference> ret = new ArrayList<>();
for (Map.Entry<TypeMirror, TypeMirror> e : changed.entrySet()) {
String oldS = Util.toHumanReadableString(e.getKey());
String newS = Util.toHumanReadableString(e.getValue());
ret.add(createDifference(Code.CLASS_SUPER_TYPE_TYPE_PARAMETERS_CHANGED,
Code.attachmentsFor(types.oldElement, types.newElement,
"oldSuperType", oldS,
"newSuperType", newS)));
}
return ret;
}
}