001// Copyright 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry.coerce;
016
017import java.util.ArrayList;
018import java.util.List;
019
020import org.apache.hivemind.util.Defense;
021import org.apache.tapestry.form.IPropertySelectionModel;
022
023/**
024 * {@link org.apache.tapestry.form.IPropertySelectionModel} created from a comma-seperated string by
025 * {@link org.apache.tapestry.coerce.StringToPropertySelectionModelConverter}.
026 * 
027 * @author Howard M. Lewis Ship
028 * @since 4.0
029 */
030public final class StringConvertedPropertySelectionModel implements IPropertySelectionModel
031{
032    private static class Entry
033    {
034        String _label;
035
036        String _value;
037
038        Entry(String term)
039        {
040            Defense.notNull(term, "term");
041
042            int equalx = term.indexOf('=');
043
044            if (equalx < 0)
045            {
046                _label = term.trim();
047                _value = _label;
048            }
049            else
050            {
051                _label = term.substring(0, equalx).trim();
052                _value = term.substring(equalx + 1).trim();
053            }
054        }
055    }
056
057    private final List _entries;
058
059    public StringConvertedPropertySelectionModel(String[] terms)
060    {
061        Defense.notNull(terms, "terms");
062
063        _entries = new ArrayList(terms.length);
064
065        for (int i = 0; i < terms.length; i++)
066        {
067            _entries.add(new Entry(terms[i]));
068        }
069    }
070
071    public int getOptionCount()
072    {
073        return _entries.size();
074    }
075
076    private Entry getEntry(int index)
077    {
078        return (Entry) _entries.get(index);
079    }
080
081    public Object getOption(int index)
082    {
083        return getValue(index);
084    }
085
086    public String getLabel(int index)
087    {
088        // TODO Auto-generated method stub
089        return getEntry(index)._label;
090    }
091
092    public String getValue(int index)
093    {
094        return getEntry(index)._value;
095    }
096
097    public Object translateValue(String value)
098    {
099        // Values are the same on the client and the server, so no translation needed.
100        return value;
101    }
102
103}