/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s): N/A.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.demo.mp3.swing.search.constraints;
// Java 2 standard packages
import javax.swing.*;
// Logging
import org.apache.log4j.Logger;
// JRDF
import org.jrdf.util.*;
import org.jrdf.graph.*;
// Local packages
import org.mulgara.demo.mp3.swing.widgets.NodeListRenderer;
/**
* List of Values to choose from.
*
* @created 2004-12-13
*
* @author <a href="mailto:robert.turner@tucanatech.com">Robert Turner</a>
*
* @version $Revision: 1.3 $
*
* @modified $Date: 2005/01/05 04:58:10 $
*
* @maintenanceAuthor $Author: newmana $
*
* @company <A href="mailto:info@PIsoftware.com">Plugged In Software</A>
*
* @copyright ©2001 <a href="http://www.pisoftware.com/">Plugged In
* Software Pty Ltd</a>
*
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
public class ValueList extends JList {
/**
* Logger. This is named after the class.
*/
private final static Logger log = Logger.getLogger(ValueList.class.getName());
/** The values to be listed */
private ClosableIterator values = null;
/** Used to edit list */
private DefaultListModel model = null;
/**
* Constructor.
*
* @param values ClosableIterator containing Triples (Objects are values).
* @throws Exception
*/
public ValueList(ClosableIterator values) throws Exception {
if (values == null) {
throw new IllegalArgumentException("'values' are null");
}
this.values = values;
setup();
}
/**
* Initilizes and sets up components.
*
* @throws Exception
*/
private void setup() throws Exception {
//instantiate
model = new DefaultListModel();
//initialize
setModel(model);
setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
removeAll();
setValueRenderer();
populate();
}
/**
* Returns the selected property from the list.
* @throws IllegalStateException
* @return ObjectNode
*/
public ObjectNode getSelected() throws IllegalStateException {
try {
return (ObjectNode) getSelectedValue();
} catch (ClassCastException castException) {
throw new IllegalStateException("List should only contain ObjectNodes.");
}
}
/**
* Adds all properties from the Iterator.
* @throws Exception
*/
private void populate() throws Exception {
try {
Triple current = null;
while (values.hasNext()) {
current = (Triple) values.next();
if (!model.contains(current.getObject())) {
model.addElement(current.getObject());
}
}
} catch (ClassCastException castException) {
throw new IllegalStateException("Values should contain Triples.");
}
}
/**
* Sets a Renderer that can Render Values (ObjectNodes).
*/
private void setValueRenderer() {
this.setCellRenderer(new NodeListRenderer());
}
}