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.object.membergroups;
021
022import java.util.Properties;
023
024import com.google.common.base.Splitter;
025import com.google.common.collect.Iterables;
026
027import org.apache.isis.applib.annotation.MemberGroupLayout.ColumnSpans;
028import org.apache.isis.core.commons.lang.StringFunctions;
029import org.apache.isis.core.commons.lang.StringPredicates;
030import org.apache.isis.core.metamodel.facetapi.FacetHolder;
031
032public class MemberGroupLayoutFacetProperties extends MemberGroupLayoutFacetAbstract {
033
034    public MemberGroupLayoutFacetProperties(
035            final Properties properties,
036            FacetHolder holder) {
037        super(asColumnSpans(properties), 
038                asListWithDefaultGroup(asGroupList(properties, "left")), 
039                asList(asGroupList(properties, "middle")), 
040                asList(asGroupList(properties, "right")), 
041                holder);
042    }
043
044    static ColumnSpans asColumnSpans(Properties properties) {
045        String columnSpansStr = properties.getProperty("columnSpans");
046        
047        if(columnSpansStr == null) {
048            return null;
049        }
050        try {
051            return ColumnSpans.valueOf(columnSpansStr.trim());
052        } catch(IllegalArgumentException ex) {
053            return null;
054        }
055    }
056
057    static String[] asGroupList(Properties properties, final String key) {
058        final String property = properties.getProperty(key);
059        if(property == null) {
060            return new String[0];
061        }
062        final Iterable<String> split = Splitter.on(',').split(property);
063        return Iterables.toArray(
064                    Iterables.filter(
065                        Iterables.transform(split,StringFunctions.TRIM), 
066                        StringPredicates.NOT_EMPTY), 
067                    String.class);
068    }
069}