/*
* Copyright (c) 2013, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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.dart.engine.internal.search.listener;
import com.google.dart.engine.search.SearchFilter;
import com.google.dart.engine.search.SearchListener;
import com.google.dart.engine.search.SearchMatch;
/**
* Instances of the class <code>FilteredSearchListener</code> implement a search listener that
* delegates to another search listener after removing matches that do not pass a given filter.
*
* @coverage dart.engine.search
*/
public class FilteredSearchListener extends WrappedSearchListener {
/**
* The filter used to filter the matches.
*/
private final SearchFilter filter;
/**
* Initialize a newly created search listener to pass on any matches that pass the given filter to
* the given listener.
*
* @param filter the filter used to filter the matches
* @param listener the search listener being wrapped
*/
public FilteredSearchListener(SearchFilter filter, SearchListener listener) {
super(listener);
this.filter = filter;
}
@Override
public void matchFound(SearchMatch match) {
if (filter.passes(match)) {
propagateMatch(match);
}
}
}