/*
* Copyright 2014 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.matchers.ChildMultiMatcher.MatchType;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.MethodInvocationTree;
/**
* Matches a method invocation based on a matcher for the method select (receiver + method
* identifier) and one for the arguments.
*
* @author schmitt@google.com (Peter Schmitt)
*/
public class MethodInvocation implements Matcher<ExpressionTree> {
private final Matcher<ExpressionTree> methodSelectMatcher;
private final MethodArgumentMatcher methodArgumentMatcher;
/**
* Creates a new matcher for method invocations based on a method select and an argument matcher.
*
* @param matchType how to apply the argument matcher to the method's arguments
*/
public MethodInvocation(Matcher<ExpressionTree> methodSelectMatcher,
MatchType matchType, Matcher<ExpressionTree> methodArgumentMatcher) {
this.methodSelectMatcher = methodSelectMatcher;
this.methodArgumentMatcher = new MethodArgumentMatcher(matchType, methodArgumentMatcher);
}
@Override
public boolean matches(ExpressionTree expressionTree, VisitorState state) {
if (!(expressionTree instanceof MethodInvocationTree)) {
return false;
}
MethodInvocationTree tree = (MethodInvocationTree) expressionTree;
return methodSelectMatcher.matches(tree.getMethodSelect(), state)
&& methodArgumentMatcher.matches(tree, state);
}
private static class MethodArgumentMatcher
extends ChildMultiMatcher<MethodInvocationTree, ExpressionTree> {
public MethodArgumentMatcher(MatchType matchType, Matcher<ExpressionTree> nodeMatcher) {
super(matchType, nodeMatcher);
}
@Override
protected Iterable<? extends ExpressionTree> getChildNodes(
MethodInvocationTree tree, VisitorState state) {
return tree.getArguments();
}
}
}