/*
* Copyright 2015 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.sun.source.tree.ExpressionTree;
import com.sun.source.tree.ReturnTree;
import com.sun.source.tree.StatementTree;
/**
* Matches a {@code return} statement whose returned expression is matched by the given matcher.
*
* @author schmitt@google.com (Peter Schmitt)
*/
public class Returns implements Matcher<StatementTree> {
private final Matcher<? super ExpressionTree> returnedMatcher;
/**
* New matcher for a {@code return} statement where the returned expression is matched by the
* passed {@code returnedMatcher}.
*/
public Returns(Matcher<? super ExpressionTree> returnedMatcher) {
this.returnedMatcher = returnedMatcher;
}
@Override
public boolean matches(StatementTree expressionTree, VisitorState state) {
if (!(expressionTree instanceof ReturnTree)) {
return false;
}
return returnedMatcher.matches(((ReturnTree) expressionTree).getExpression(), state);
}
}