Bean Property Table Model
/*
* Copyright (C) 2001-2003 Colin Bell
* colbell@users.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.Vector;
import javax.swing.table.DefaultTableModel;
public class BeanPropertyTableModel extends DefaultTableModel
{
private static final long serialVersionUID = 1L;
private Object _bean;
private String _nameColumnName = "Namecolumn";
private String _valueColumnName = "Valuecolumn";
public BeanPropertyTableModel()
{
super();
}
public void setBean(Object bean) throws RuntimeException
{
_bean = bean;
refresh();
}
public void refresh() throws RuntimeException
{
final Vector<Object> columnNames = new Vector<Object>();
columnNames.add(_nameColumnName);
columnNames.add(_valueColumnName);
final Vector<Object> columnData = new Vector<Object>();
if (_bean != null)
{
try
{
BeanInfo info = Introspector.getBeanInfo(_bean.getClass(), Introspector.USE_ALL_BEANINFO);
processBeanInfo(info, columnData);
}
catch (Exception ex)
{
throw new RuntimeException(ex);
}
}
// Sort the rows by the property name.
Collections.sort(columnData, new DataSorter());
setDataVector(columnData, columnNames);
}
private void processBeanInfo(BeanInfo info, Vector<Object> columnData)
throws InvocationTargetException, IllegalAccessException
{
BeanInfo[] extra = info.getAdditionalBeanInfo();
if (extra != null)
{
for (int i = 0; i < extra.length; ++i)
{
processBeanInfo(extra[i], columnData);
}
}
PropertyDescriptor[] propDesc = info.getPropertyDescriptors();
for (int i = 0; i < propDesc.length; ++i)
{
final String propName = propDesc[i].getName();
final Method getter = propDesc[i].getReadMethod();
if (propName != null && getter != null)
{
Vector<Object> line = generateLine(propName, _bean, getter);
if (line != null)
{
columnData.add(line);
}
}
}
}
/**
* Generate a line for the passed property.
*
* @param propName Name of the property.
* @param bean Bean containg the property.
* @param getter The "getter" function to retrieve the
* properties value.
*
* @return A <CODE>Vector</CODE> containing the cells for the line in
* the table. Element zero the first cell etc. Return
* <CODE>null</CODE> if this property is <B>not</B> to be added
* to the table.
*/
protected Vector<Object> generateLine(String propName, Object bean, Method getter)
throws InvocationTargetException, IllegalAccessException
{
final Vector<Object> line = new Vector<Object>();
line.add(propName);
line.add(executeGetter(bean, getter));
return line;
}
protected Object executeGetter(Object bean, Method getter)
throws InvocationTargetException, IllegalAccessException
{
return getter.invoke(bean, (Object[])null);
}
public void setNameColumnName(String value)
{
_nameColumnName = value;
}
public void setValueColumnName(String value)
{
_valueColumnName = value;
}
/**
* This comparator is compatible with the strange use of lists in this
* class. This classes lists are Vectors with Strings as the first element
* and any object as the other objects.
*/
private static final class DataSorter implements Comparator<Object>
{
public int compare(Object o1, Object o2)
{
Vector<Object> v1 = (Vector<Object>)o1;
Vector<Object> v2 = (Vector<Object>)o2;
String lhs = (String)v1.get(0);
String rhs = (String)v2.get(0);
return lhs.compareToIgnoreCase(rhs);
}
}
}
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