001    // Copyright May 31, 2006 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    package org.apache.tapestry.data;
015    
016    import org.apache.tapestry.services.DataSqueezer;
017    import org.apache.tapestry.services.DataSqueezerFilter;
018    
019    
020    /**
021     * A useful superclass for data squeezer filters.  Subclasses only have
022     * to implement the single object versions of the squeeze/unsqueeze methods.
023     * 
024     * @author jcarman
025     */
026    public abstract class AbstractDataSqueezerFilter implements DataSqueezerFilter
027    {
028    
029        /**
030         * Merely calls squeeze(Object,DataSqueezer) on each object in 
031         * the array. 
032         */
033        public String[] squeeze( Object[] objects, DataSqueezer next )
034        {
035            final String[] squeezed = new String[objects.length];
036            
037            for( int i = 0; i < squeezed.length; i++ ) {
038                
039                squeezed[i] = squeeze( objects[i], next );
040            }
041            
042            return squeezed;
043        }
044    
045        /**
046         * Merely calls unsqueeze(String,DataSqueezer) on each object in
047         * the array. 
048         */
049        public Object[] unsqueeze( String[] strings, DataSqueezer next )
050        {
051            final Object[] unsqueezed = new Object[strings.length];
052            
053            for( int i = 0; i < unsqueezed.length; i++ ) {
054                
055                unsqueezed[i] = unsqueeze( strings[i], next );
056            }
057            
058            return unsqueezed;
059        }
060    }