org.springframework.richclient.table.renderer.BeanTableCellRenderer.java Source code

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Here is the source code for org.springframework.richclient.table.renderer.BeanTableCellRenderer.java

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/*
 * Copyright 2002-2004 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.springframework.richclient.table.renderer;

import java.awt.Component;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;

import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;

/**
 * Renders a bean by using its default property. If no default property is defined the beans toString method will be
 * used as the value. To render the default property the table default renderer for the property class will be used to
 * get the cell component.
 * 
 * @see JTable#getDefaultRenderer(Class)
 * 
 * @author Keith Donald
 * @author Mathias Broekelmann
 */
public class BeanTableCellRenderer extends DefaultTableCellRenderer {
    private static final Log log = LogFactory.getLog(BeanTableCellRenderer.class);

    private BeanWrapper beanWrapper;

    public BeanTableCellRenderer() {
        super();
    }

    public BeanTableCellRenderer(BeanWrapper wrapper) {
        beanWrapper = wrapper;
    }

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
            int row, int column) {
        if (value != null) {
            if (beanWrapper == null) {
                beanWrapper = new BeanWrapperImpl(value);
            } else {
                beanWrapper.setWrappedInstance(value);
            }
            try {
                BeanInfo info = Introspector.getBeanInfo(value.getClass());
                int index = info.getDefaultPropertyIndex();
                if (index != -1) {
                    String defaultPropName = beanWrapper.getPropertyDescriptors()[index].getName();
                    Object val = beanWrapper.getPropertyValue(defaultPropName);
                    TableCellRenderer r = table.getDefaultRenderer(val.getClass());
                    return r.getTableCellRendererComponent(table, val, isSelected, hasFocus, row, column);
                }
            } catch (IntrospectionException e) {
                log.debug("Error during introspection of bean: " + e.getMessage(), e);
            }
        }
        return super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
    }
}