/*
* Copyright 2013 Google Inc. All Rights Reserved.
*
* 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 com.google.errorprone.matchers;
import com.google.errorprone.VisitorState;
import com.google.errorprone.suppliers.Supplier;
import com.sun.source.tree.Tree;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Types;
import com.sun.tools.javac.tree.JCTree;
/**
* @author eaftan@google.com (Eddie Aftandilian)
*/
public class IsSubtypeOf<T extends Tree> extends AbstractTypeMatcher<T> {
public IsSubtypeOf(Supplier<Type> typeToCompareSupplier) {
super(typeToCompareSupplier);
}
public IsSubtypeOf(String typeString) {
super(typeString);
}
public IsSubtypeOf(Tree tree) {
super(tree);
}
public IsSubtypeOf(Type typeToCompare) {
super(typeToCompare);
}
@Override
public boolean matches(T tree, VisitorState state) {
Types types = state.getTypes();
Type typeToCompare = typeToCompareSupplier.get(state);
return (typeToCompare != null &&
types.isSubtype(((JCTree) tree).type, types.erasure(typeToCompare)));
}
}