/*
* Copyright 2007 Tom Gibara
*
* 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 org.jgrasstools.gears.utils.clustering;
import java.util.List;
/**
* Allows multiple keys to be associated with clusters in the form of a lists
* which may be concatenated when clusters merge.
*
* @author Tom Gibara
*
* @param <K>
* type of key
*/
//TODO if hierachial clustering is supported, lists will need to be treated as unmodifiable
public class GvmListKeyer<K> extends GvmSimpleKeyer<List<K>> {
protected List<K> combineKeys(List<K> list1, List<K> list2) {
list1.addAll(list2);
return list1;
}
}