/*
* 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.classes;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.List;
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 final class NowImplementsInterface extends CheckBase {
@Override
public EnumSet<Type> getInterest() {
return EnumSet.of(Type.CLASS);
}
@Override
protected void doVisitClass(JavaTypeElement oldType, JavaTypeElement newType) {
if (oldType == null || newType == null || isBothPrivate(oldType, newType)) {
return;
}
//hmm, these might not be right I assume if the types are inner classes parameterized by the type parameters
//of the containing class
List<? extends TypeMirror> newInterfaces = newType.getDeclaringElement().getInterfaces();
List<? extends TypeMirror> oldInterfaces = oldType.getDeclaringElement().getInterfaces();
for (TypeMirror newIface : newInterfaces) {
if (!Util.isSubtype(newIface, oldInterfaces, getNewTypeEnvironment().getTypeUtils())) {
pushActive(oldType, newType);
break;
}
}
}
@Override
protected List<Difference> doEnd() {
CheckBase.ActiveElements<JavaTypeElement> types = popIfActive();
if (types == null) {
return null;
}
List<Difference> result = new ArrayList<>();
List<? extends TypeMirror> newInterfaces = types.newElement.getDeclaringElement().getInterfaces();
List<? extends TypeMirror> oldInterfaces = types.oldElement.getDeclaringElement().getInterfaces();
for (TypeMirror newIface : newInterfaces) {
if (!Util.isSubtype(newIface, oldInterfaces, getNewTypeEnvironment().getTypeUtils())) {
result.add(
createDifference(Code.CLASS_NOW_IMPLEMENTS_INTERFACE,
Code.attachmentsFor(types.oldElement, types.newElement,
"interface", Util.toHumanReadableString(newIface)))
);
}
}
return result;
}
}