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 Integer}. This adaptor claims all the digits as prefix
021     * characters, so its the very simplest conversion of all!
022     * 
023     * @author Howard Lewis Ship
024     */
025    
026    public class IntegerAdaptor implements SqueezeAdaptor
027    {
028    
029        public String getPrefix()
030        {
031            return "-0123456789";
032        }
033    
034        public Class getDataClass()
035        {
036            return Integer.class;
037        }
038    
039        /**
040         * Simply invokes <code>toString()</code> on the data, which is actually
041         * type {@link Integer}.
042         */
043    
044        public String squeeze(DataSqueezer squeezer, Object data)
045        {
046            return data.toString();
047        }
048    
049        /**
050         * Constructs an {@link Integer} from the string.
051         */
052    
053        public Object unsqueeze(DataSqueezer squeezer, String string)
054        {
055            return new Integer(string);
056        }
057    
058    }