/*
* Copyright 2012 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.MethodInvocationTree;
/**
* Applies an Expression matcher to an argument of a MethodInvocation by position.
* @author alexeagle@google.com (Alex Eagle)
*/
public class MethodInvocationArgument implements Matcher<MethodInvocationTree> {
private final int position;
private final Matcher<ExpressionTree> argumentMatcher;
public MethodInvocationArgument(int position, Matcher<ExpressionTree> argumentMatcher) {
this.position = position;
this.argumentMatcher = argumentMatcher;
}
@Override
public boolean matches(MethodInvocationTree methodInvocationTree, VisitorState state) {
if (methodInvocationTree.getArguments().size() <= position) {
return false;
}
return argumentMatcher.matches(methodInvocationTree.getArguments().get(position), state);
}
}