001    /**
002     * Copyright (c) 2000-2011 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.dynamicdatamapping.storage;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.theme.ThemeDisplay;
020    
021    import java.io.Serializable;
022    
023    /**
024     * @author Bruno Basto
025     */
026    public abstract class BaseFieldRenderer implements FieldRenderer {
027    
028            public String render(ThemeDisplay themeDisplay, Serializable fieldValue) {
029                    try {
030                            return doRender(themeDisplay, fieldValue);
031                    }
032                    catch (Exception e) {
033                            if (_log.isErrorEnabled()) {
034                                    _log.error("Unable to render field", e);
035                            }
036                    }
037    
038                    return null;
039            }
040    
041            protected abstract String doRender(
042                            ThemeDisplay themeDisplay, Serializable fieldValue)
043                    throws Exception;
044    
045            private static Log _log = LogFactoryUtil.getLog(BaseFieldRenderer.class);
046    
047    }