/*
* 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 groovy.util;
import groovy.lang.
Closure;
import org.codehaus.groovy.runtime.typehandling.
DefaultTypeTransformation;
import java.io.
Serializable;
import java.util.
Comparator;
/**
* A Comparator which uses a closure to compare 2 values being equal
*
* @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
*/
public class
ClosureComparator<T> implements
Comparator<T>,
Serializable {
private static final long
serialVersionUID = -4593521535656429522L;
Closure closure;
public
ClosureComparator(
Closure closure) {
this.
closure =
closure;
}
public int
compare(T
object1, T
object2) {
Object value =
closure.
call(
object1,
object2);
return
DefaultTypeTransformation.
intUnbox(
value);
}
}