/**
* 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.dkpro.bigdata.collocations;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableComparator;
import java.io.Serializable;
/** Group GramKeys based on their Gram, ignoring the secondary sort key, so that all keys with the same Gram are sent
* to the same call of the reduce method, sorted in natural order (for GramKeys).
*/
class GramKeyGroupComparator extends WritableComparator implements Serializable {
GramKeyGroupComparator() {
super(GramKey.class, true);
}
@Override
public int compare(WritableComparable a, WritableComparable b) {
GramKey gka = (GramKey) a;
GramKey gkb = (GramKey) b;
return WritableComparator.compareBytes(gka.getBytes(), 0, gka.getPrimaryLength(),
gkb.getBytes(), 0, gkb.getPrimaryLength());
}
}