VisitingComparator.java

/**
 * Copyright 2015 Santhosh Kumar Tekuri
 *
 * The JLibs authors license 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 jlibs.core.util;

import jlibs.core.graph.Visitor;

/**
 * @author Santhosh Kumar T
 */
public class VisitingComparator<T> extends DefaultComparator<T>{
    private Visitor<T, Comparable> visitor;

    public VisitingComparator(Visitor<T, Comparable> visitor){
        this.visitor = visitor;
    }

    @Override
    @SuppressWarnings({"unchecked"})
    protected int _compare(T o1, T o2) {
        return visitor.visit(o1).compareTo(visitor.visit(o2));
    }
}