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.progmodel.facets.members.order;
021
022import com.google.common.base.Strings;
023
024import org.apache.isis.core.metamodel.facetapi.Facet;
025import org.apache.isis.core.metamodel.facetapi.FacetHolder;
026import org.apache.isis.core.metamodel.facets.MultipleValueFacetAbstract;
027import org.apache.isis.core.metamodel.facets.members.order.MemberOrderFacet;
028
029public abstract class MemberOrderFacetAbstract extends MultipleValueFacetAbstract implements MemberOrderFacet {
030
031    public static Class<? extends Facet> type() {
032        return MemberOrderFacet.class;
033    }
034
035    private final String name;
036    private final String sequence;
037
038    public MemberOrderFacetAbstract(final String name, final String sequence, final FacetHolder holder) {
039        super(type(), holder);
040        this.name = valueElse(name, "");
041        this.sequence = valueElse(sequence, "1");
042    }
043
044    private static String valueElse(final String name, final String string) {
045        return !Strings.isNullOrEmpty(name) ? name : string;
046    }
047
048    @Override
049    public String name() {
050        return name;
051    }
052
053    @Override
054    public String sequence() {
055        return sequence;
056    }
057
058}