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
015package org.apache.tapestry5.services;
016
017import 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 */
024public 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}