| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.hyracks.dataflow.hadoop.data; |
| |
| import org.apache.hadoop.io.RawComparator; |
| |
| import edu.uci.ics.hyracks.api.dataflow.value.IComparator; |
| import edu.uci.ics.hyracks.api.dataflow.value.IComparatorFactory; |
| import edu.uci.ics.hyracks.dataflow.common.util.ReflectionUtils; |
| |
| public class KeyComparatorFactory<T> implements IComparatorFactory<T> { |
| private static final long serialVersionUID = 1L; |
| private Class<? extends RawComparator<T>> cmpClass; |
| |
| public KeyComparatorFactory(Class<? extends RawComparator<T>> cmpClass) { |
| this.cmpClass = cmpClass; |
| } |
| |
| @Override |
| public IComparator<T> createComparator() { |
| final RawComparator<T> instance = ReflectionUtils.createInstance(cmpClass); |
| return new IComparator<T>() { |
| @Override |
| public int compare(T o1, T o2) { |
| return instance.compare(o1, o2); |
| } |
| }; |
| } |
| } |