001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.metamodel.layout.memberorderfacet;
021
022import java.io.Serializable;
023import java.util.Comparator;
024
025import org.apache.isis.applib.Identifier;
026import org.apache.isis.core.metamodel.facetapi.IdentifiedHolder;
027import org.apache.isis.core.metamodel.facets.FacetedMethod;
028
029/**
030 * Compares {@link FacetedMethod}) by {@link FacetedMethod#getIdentifier()}
031 * 
032 */
033public class MemberIdentifierComparator implements Comparator<IdentifiedHolder>, Serializable {
034
035    private static final long serialVersionUID = 1L;
036
037    @Override
038    public int compare(final IdentifiedHolder o1, final IdentifiedHolder o2) {
039        final Identifier identifier1 = o1.getIdentifier();
040        final Identifier identifier2 = o2.getIdentifier();
041        return identifier1.compareTo(identifier2);
042    }
043
044}