/**
* Copyright 2010 JBoss Inc
*
* 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.jbpm.process.instance.impl.humantask;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.WindowConstants;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import org.drools.runtime.process.WorkItem;
import org.drools.runtime.process.WorkItemHandler;
import org.drools.runtime.process.WorkItemManager;
/**
*
* @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen</a>
*/
public class HumanTaskHandler extends JFrame implements WorkItemHandler {
private static final long serialVersionUID = 510l;
private Map<WorkItem, WorkItemManager> workItems = new HashMap<WorkItem, WorkItemManager>();
private JTextField actorTextField;
private JList workItemsList;
private JButton selectButton;
public HumanTaskHandler() {
setSize(new Dimension(400, 300));
setTitle("Work Items");
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
initializeComponent();
}
private void initializeComponent() {
JPanel panel = new JPanel();
panel.setLayout(new GridBagLayout());
getRootPane().setLayout(new BorderLayout());
getRootPane().add(panel, BorderLayout.CENTER);
JLabel label = new JLabel("Actor");
GridBagConstraints c = new GridBagConstraints();
c.insets = new Insets(5, 5, 5, 5);
panel.add(label, c);
actorTextField = new JTextField();
c = new GridBagConstraints();
c.weightx = 1;
c.fill = GridBagConstraints.HORIZONTAL;
c.insets = new Insets(5, 5, 5, 5);
panel.add(actorTextField, c);
JButton updateButton = new JButton("Update");
updateButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
update();
}
});
c = new GridBagConstraints();
c.insets = new Insets(5, 5, 5, 5);
panel.add(updateButton, c);
workItemsList = new JList();
workItemsList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
workItemsList.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
select();
}
}
});
workItemsList.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
selectButton.setEnabled(getSelectedWorkItem() != null);
}
});
c = new GridBagConstraints();
c.gridy = 1;
c.weightx = 1;
c.weighty = 1;
c.gridwidth = 3;
c.fill = GridBagConstraints.BOTH;
c.insets = new Insets(5, 5, 5, 5);
panel.add(workItemsList, c);
selectButton = new JButton("Select");
selectButton.setEnabled(false);
selectButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
select();
}
});
c = new GridBagConstraints();
c.gridy = 2;
c.weightx = 1;
c.gridwidth = 3;
c.anchor = GridBagConstraints.EAST;
c.insets = new Insets(5, 5, 5, 5);
panel.add(selectButton, c);
}
private void update() {
String actor = actorTextField.getText();
if ("".equals(actor)) {
actor = null;
}
reloadWorkItemsList(actor);
}
private void select() {
WorkItem workItem = getSelectedWorkItem();
if (workItem != null) {
HumanTaskDialog dialog = new HumanTaskDialog(HumanTaskHandler.this, workItem);
dialog.setVisible(true);
}
}
public WorkItem getSelectedWorkItem() {
int index = workItemsList.getSelectedIndex();
if (index != -1) {
Object selected = workItemsList.getModel().getElementAt(index);
if (selected instanceof WorkItemWrapper) {
return ((WorkItemWrapper) selected).getWorkItem();
}
}
return null;
}
private void reloadWorkItemsList(String actor) {
List<WorkItemWrapper> result = new ArrayList<WorkItemWrapper>();
for (Iterator<WorkItem> iterator = workItems.keySet().iterator(); iterator.hasNext(); ) {
WorkItem workItem = iterator.next();
if (actor == null
|| workItem.getParameter("ActorId") == null
|| actor.equals(workItem.getParameter("ActorId"))) {
result.add(new WorkItemWrapper(workItem));
}
}
workItemsList.setListData(result.toArray());
}
public void complete(WorkItem workItem, Map<String, Object> results) {
WorkItemManager manager = workItems.get(workItem);
if (manager != null) {
manager.completeWorkItem(workItem.getId(), results);
}
workItems.remove(workItem);
update();
selectButton.setEnabled(getSelectedWorkItem() != null);
}
public void abort(WorkItem workItem) {
WorkItemManager manager = workItems.get(workItem);
if (manager != null) {
manager.abortWorkItem(workItem.getId());
}
workItems.remove(workItem);
update();
selectButton.setEnabled(getSelectedWorkItem() != null);
}
public void abortWorkItem(WorkItem workItem, WorkItemManager manager) {
workItems.remove(workItem);
}
public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {
workItems.put(workItem, manager);
}
private class WorkItemWrapper {
private WorkItem workItem;
public WorkItemWrapper(WorkItem workItem) {
this.workItem = workItem;
}
public WorkItem getWorkItem() {
return workItem;
}
public String toString() {
return "[" + workItem.getId() + "] " + workItem.getParameter("TaskName");
}
}
}