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 Long}.
021     * 
022     * @author Howard Lewis Ship
023     */
024    
025    public class LongAdaptor implements SqueezeAdaptor
026    {
027    
028        private static final String PREFIX = "l";
029    
030        public String getPrefix()
031        {
032            return PREFIX;
033        }
034    
035        public Class getDataClass()
036        {
037            return Long.class;
038        }
039    
040        /**
041         * Invoked <code>toString()</code> on data (which is type {@link Long}),
042         * and prefixs the result.
043         */
044    
045        public String squeeze(DataSqueezer squeezer, Object data)
046        {
047            return PREFIX + data.toString();
048        }
049    
050        /**
051         * Constructs a {@link Long} from the string, after stripping the prefix.
052         */
053    
054        public Object unsqueeze(DataSqueezer squeezer, String string)
055        {
056            return new Long(string.substring(1));
057        }
058    
059    }