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    
015    package org.apache.tapestry.util.io;
016    
017    import org.apache.tapestry.services.DataSqueezer;
018    
019    /**
020     * Squeezes a {@link Boolean}.
021     * 
022     * @author Howard Lewis Ship
023     */
024    
025    public 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    }