001// Copyright 2004, 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.util.io;
016
017import org.apache.tapestry.services.DataSqueezer;
018
019/**
020 * Squeezes a {@link Boolean}.
021 * 
022 * @author Howard Lewis Ship
023 */
024
025public class BooleanAdaptor implements SqueezeAdaptor
026{
027    private static final String PREFIX = "TF";
028
029    public String getPrefix()
030    {
031        return PREFIX;
032    }
033
034    public Class getDataClass()
035    {
036        return Boolean.class;
037    }
038
039    /**
040     * Squeezes the {@link Boolean}data to either 'T' or 'F'.
041     */
042
043    public String squeeze(DataSqueezer squeezer, Object data)
044    {
045        Boolean bool = (Boolean) data;
046
047        return bool.booleanValue() ? "T" : "F";
048    }
049
050    /**
051     * Unsqueezes the string to either {@link Boolean#TRUE}or {@link Boolean#FALSE}, depending on
052     * the prefix character.
053     */
054
055    public Object unsqueeze(DataSqueezer squeezer, String string)
056    {
057        char ch = string.charAt(0);
058
059        if (ch == 'T')
060            return Boolean.TRUE;
061
062        return Boolean.FALSE;
063    }
064
065}