/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.mahout.cf.taste.hadoop.similarity.item;
import java.io.Serializable;
import java.util.Comparator;
class SimilarItem {
static final Comparator<SimilarItem> COMPARE_BY_SIMILARITY = new BySimilaritySimilarItemComparator();
private final long itemID;
private final double similarity;
SimilarItem(long itemID, double similarity) {
this.itemID = itemID;
this.similarity = similarity;
}
public long getItemID() {
return itemID;
}
public double getSimilarity() {
return similarity;
}
static class BySimilaritySimilarItemComparator implements Comparator<SimilarItem>, Serializable {
@Override
public int compare(SimilarItem s1, SimilarItem s2) {
return s1.similarity == s2.similarity ? 0 : s1.similarity < s2.similarity ? -1 : 1;
}
}
}