org.apache.hadoop.hive.serde2.objectinspector.SimpleMapEqualComparer Maven / Gradle / Ivy
/*
* 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.hadoop.hive.serde2.objectinspector;
import java.util.Map;
/*
* Assumes that a getMapValueElement on object2 will work with a key from
* object1. The equality is implemented fully, the greater-than/less-than
* values do not implement a transitive relation.
*/
public class SimpleMapEqualComparer implements MapEqualComparer {
@Override
public int compare(Object o1, MapObjectInspector moi1, Object o2, MapObjectInspector moi2) {
int mapsize1 = moi1.getMapSize(o1);
int mapsize2 = moi2.getMapSize(o2);
if (mapsize1 != mapsize2) {
return mapsize1 - mapsize2;
}
ObjectInspector mvoi1 = moi1.getMapValueObjectInspector();
ObjectInspector mvoi2 = moi2.getMapValueObjectInspector();
Map map1 = moi1.getMap(o1);
for (Object mk1: map1.keySet()) {
int rc = ObjectInspectorUtils.compare(moi1.getMapValueElement(o1, mk1), mvoi1,
moi2.getMapValueElement(o2, mk1), mvoi2, this);
if (rc != 0) {
return rc;
}
}
return 0;
}
}