001    // Copyright 2009 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.tapestry5.services;
016    
017    import org.apache.tapestry5.MarkupWriter;
018    
019    /**
020     * Default object renderer as a catch all for class <code>Object</code>.
021     * 
022     * @since 5.2.0
023     */
024    public class DefaultObjectRenderer implements ObjectRenderer<Object>
025    {
026        public void render(Object object, MarkupWriter writer)
027        {
028            try
029            {
030                writer.write(String.valueOf(object));
031            }
032            catch (Exception ex)
033            {
034                writer.element("span", "class", "t-render-object-error");
035    
036                String message = ex.getMessage();
037    
038                String exceptionClassName = ex.getClass().getName();
039    
040                String exceptionId = message == null ? exceptionClassName : String.format("(%s) %s", ex
041                        .getClass().getName(), message);
042    
043                writer.writef("Exception rendering description for object of type %s: %s", object
044                        .getClass().getName(), exceptionId);
045    
046                writer.end();
047    
048            }
049        }
050    }