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JSF components and utilities that can be used with any JSF implementation.
This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build
changes to take advantage of JSF1.2 features. A JSF1.2 implementation is required to use this
version of the Tomahawk library.
The newest version!
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.myfaces.custom.tree;
import java.io.IOException;
import java.io.Serializable;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import javax.faces.component.UIViewRoot;
import javax.faces.component.html.HtmlPanelGroup;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import org.apache.myfaces.custom.tree.event.TreeSelectionEvent;
import org.apache.myfaces.custom.tree.event.TreeSelectionListener;
import org.apache.myfaces.custom.tree.model.TreeModel;
import org.apache.myfaces.custom.tree.model.TreeModelEvent;
import org.apache.myfaces.custom.tree.model.TreeModelListener;
import org.apache.myfaces.custom.tree.model.TreePath;
/**
* A tree data component.
* Unless otherwise specified, all attributes accept static values or EL expressions.
*
* Tree implementation based on javax.swing.JTree.
*
*
* The tree model is assigned by using a value binding named model
* and is not stored in view state.
*
*
* A hierarchy of {@link HtmlTreeNode}objects is used to represent the current
* expanded state of the tree. The root node is held as a faces named *
* rootNode.
*
*
* @JSFComponent
* name = "t:tree"
* tagClass = "org.apache.myfaces.custom.tree.taglib.TreeTag"
* tagSuperclass = "org.apache.myfaces.custom.tree.taglib.AbstractTreeTag"
* type = "org.apache.myfaces.HtmlTree"
* tagHandler = "org.apache.myfaces.custom.tree.taglib.TreeTagHandler"
*
* @JSFJspProperty name = "headerClass" returnType = "java.lang.String"
* @JSFJspProperty name = "footerClass" returnType = "java.lang.String"
* @JSFJspProperty name = "expandRoot" returnType = "boolean" literalOnly="true" inheritedTag="true"
* @JSFJspProperty name = "style" tagExcluded = "true"
* @author Oliver Rossmueller
* @version $Revision: 672986 $ $Date: 2008-06-30 23:13:55 -0500 (Mon, 30 Jun 2008) $
*/
public class HtmlTree extends HtmlPanelGroup implements TreeModelListener
{
public static final String COMPONENT_TYPE = "org.apache.myfaces.HtmlTree";
public static final String COMPONENT_FAMILY = "org.apache.myfaces.HtmlTree";
private static final String DEFAULT_RENDERER_TYPE = "org.apache.myfaces.HtmlTree";
public static final long DEFAULT_EXPIRE_LISTENERS = 8 * 60 * 60 * 1000; // 8 hours
private static final String FACET_ROOTNODE = "rootNode";
private static final String PREVIOUS_VIEW_ROOT = HtmlTree.class.getName() + ".PREVIOUS_VIEW_ROOT";
private static final int EVENT_CHANGED = 0;
private static final int EVENT_INSERTED = 1;
private static final int EVENT_REMOVED = 2;
private static final int EVENT_STRUCTURE_CHANGED = 3;
private static int counter = 0;
private IconProvider iconProvider;
private boolean itemStatesRestored = false;
private String var;
private String nodeClass;
private String rowClasses;
private String columnClasses;
private String selectedNodeClass;
private String iconClass;
private String iconLine;
private String iconNoline;
private String iconChildFirst;
private String iconChildMiddle;
private String iconChildLast;
private String iconNodeOpen;
private String iconNodeOpenFirst;
private String iconNodeOpenMiddle;
private String iconNodeOpenLast;
private String iconNodeClose;
private String iconNodeCloseFirst;
private String iconNodeCloseMiddle;
private String iconNodeCloseLast;
private int uniqueIdCounter = 0;
private int[] selectedPath;
private int internalId;
private Long expireListeners;
/**
*
* Default constructor.
*
*/
public HtmlTree()
{
internalId = counter++;
}
/**
* @JSFProperty
* jspName = "value"
* required = "true"
* inheritedTag = "true"
*/
public TreeModel getModel(FacesContext context)
{
ValueBinding binding = getValueBinding("model");
if (binding != null)
{
TreeModel model = (TreeModel) binding.getValue(context);
if (model != null)
{
return model;
}
}
return null;
}
public String createUniqueId(FacesContext context)
{
return getClientId(context).replaceAll(":", "_") + "_node_" + uniqueIdCounter++;
}
public void addTreeSelectionListener(TreeSelectionListener listener)
{
addFacesListener(listener);
}
public IconProvider getIconProvider()
{
return iconProvider;
}
public void setIconProvider(IconProvider iconProvider)
{
this.iconProvider = iconProvider;
}
/**
* @JSFProperty
* @return Returns the var.
*/
public String getVar()
{
return getStringValue(var, "var");
}
/**
* @param var The var to set.
*/
public void setVar(String var)
{
this.var = var;
}
protected String getStringValue(String value, String vbName)
{
if(value != null)
{
return value;
}
ValueBinding vb = getValueBinding(vbName);
if(vb != null)
{
Object obj = vb.getValue(getFacesContext());
if(obj != null)
{
return obj.toString();
}
}
return null;
}
/**
* @JSFProperty
*/
public String getIconLine()
{
return getStringValue(iconLine, "iconLine");
}
public void setIconLine(String iconLine)
{
this.iconLine = iconLine;
}
/**
* @JSFProperty
*/
public String getIconNoline()
{
return getStringValue(iconNoline, "iconNoline");
}
public void setIconNoline(String iconNoline)
{
this.iconNoline = iconNoline;
}
/**
* @JSFProperty
*/
public String getIconChildFirst()
{
return getStringValue(iconChildFirst, "iconChildFirst");
}
public void setIconChildFirst(String iconChildFirst)
{
this.iconChildFirst = iconChildFirst;
}
/**
* @JSFProperty
*/
public String getIconChildMiddle()
{
return getStringValue(iconChildMiddle, "iconChildMiddle");
}
public void setIconChildMiddle(String iconChildMiddle)
{
this.iconChildMiddle = iconChildMiddle;
}
/**
* @JSFProperty
*/
public String getIconChildLast()
{
return getStringValue(iconChildLast, "iconChildLast");
}
public void setIconChildLast(String iconChildLast)
{
this.iconChildLast = iconChildLast;
}
/**
* @JSFProperty
*/
public String getIconNodeOpen()
{
return getStringValue(iconNodeOpen, "iconNodeOpen");
}
public void setIconNodeOpen(String iconNodeOpen)
{
this.iconNodeOpen = iconNodeOpen;
}
/**
* @JSFProperty
*/
public String getIconNodeOpenFirst()
{
return getStringValue(iconNodeOpenFirst, "iconNodeOpenFirst");
}
public void setIconNodeOpenFirst(String iconNodeOpenFirst)
{
this.iconNodeOpenFirst = iconNodeOpenFirst;
}
/**
* @JSFProperty
*/
public String getIconNodeOpenMiddle()
{
return getStringValue(iconNodeOpenMiddle, "iconNodeOpenMiddle");
}
public void setIconNodeOpenMiddle(String iconNodeOpenMiddle)
{
this.iconNodeOpenMiddle = iconNodeOpenMiddle;
}
/**
* @JSFProperty
*/
public String getIconNodeOpenLast()
{
return getStringValue(iconNodeOpenLast, "iconNodeOpenLast");
}
public void setIconNodeOpenLast(String iconNodeOpenLast)
{
this.iconNodeOpenLast = iconNodeOpenLast;
}
/**
* @JSFProperty
*/
public String getIconNodeClose()
{
return getStringValue(iconNodeClose, "iconNodeClose");
}
public void setIconNodeClose(String iconNodeClose)
{
this.iconNodeClose = iconNodeClose;
}
/**
* @JSFProperty
*/
public String getIconNodeCloseFirst()
{
return getStringValue(iconNodeCloseFirst, "iconNodeCloseFirst");
}
public void setIconNodeCloseFirst(String iconNodeCloseFirst)
{
this.iconNodeCloseFirst = iconNodeCloseFirst;
}
/**
* @JSFProperty
*/
public String getIconNodeCloseMiddle()
{
return getStringValue(iconNodeCloseMiddle, "iconNodeCloseMiddle");
}
public void setIconNodeCloseMiddle(String iconNodeCloseMiddle)
{
this.iconNodeCloseMiddle = iconNodeCloseMiddle;
}
/**
* @JSFProperty
*/
public String getIconNodeCloseLast()
{
return getStringValue(iconNodeCloseLast, "iconNodeCloseLast");
}
public void setIconNodeCloseLast(String iconNodeCloseLast)
{
this.iconNodeCloseLast = iconNodeCloseLast;
}
/**
* @JSFProperty
*/
public String getNodeClass()
{
return getStringValue(nodeClass, "nodeClass");
}
public void setNodeClass(String nodeClass)
{
this.nodeClass = nodeClass;
}
/**
* @JSFProperty
* @return Returns the rowClasses.
*/
public String getRowClasses()
{
return getStringValue(rowClasses, "rowClasses");
}
/**
* @param rowClasses The rowClasses to set.
*/
public void setRowClasses(String rowClasses)
{
this.rowClasses = rowClasses;
}
/**
* @JSFProperty
* @return Returns the columnClasses.
*/
public String getColumnClasses()
{
return getStringValue(columnClasses, "columnClasses");
}
/**
* @param columnClasses The columnClasses to set.
*/
public void setColumnClasses(String columnClasses)
{
this.columnClasses = columnClasses;
}
/**
* @JSFProperty
* @return Returns the selectedNodeClass.
*/
public String getSelectedNodeClass()
{
return getStringValue(selectedNodeClass, "selectedNodeClass");
}
/**
* @param selectedNodeClass The selectedNodeClass to set.
*/
public void setSelectedNodeClass(String selectedNodeClass)
{
this.selectedNodeClass = selectedNodeClass;
}
/**
* @JSFProperty
*/
public String getIconClass()
{
return getStringValue(iconClass, "iconClass");
}
public void setIconClass(String iconClass)
{
this.iconClass = iconClass;
}
/**
* Time interval the tree will remain registered as a TreeModelListener
* without being accessed
*
* @JSFProperty
*/
public long getExpireListeners()
{
if(expireListeners != null)
{
return expireListeners.longValue();
}
ValueBinding vb = getValueBinding("expireListeners");
if(vb != null)
{
Object obj = vb.getValue(getFacesContext());
if(obj instanceof java.lang.Number)
{
return ((java.lang.Number)obj).longValue();
}
}
return DEFAULT_EXPIRE_LISTENERS;
}
public void setExpireListeners(long expireListeners)
{
this.expireListeners = new Long(expireListeners);
}
public String getFamily()
{
return "org.apache.myfaces.HtmlTree";
}
/**
* Ensures that the node identified by the specified path is expanded and
* viewable. If the last item in the path is a leaf, this will have no
* effect.
*
* @param path the TreePath identifying a node
*/
public void expandPath(TreePath path, FacesContext context)
{
// Only expand if not leaf!
TreeModel model = getModel(context);
if (path != null && model != null && !model.isLeaf(path.getLastPathComponent()))
{
int[] translatedPath = HtmlTreeNode.translatePath(path, getModel(context));
HtmlTreeNode rootNode = getRootNode();
if (rootNode == null)
{
createRootNode(context);
rootNode = getRootNode();
}
if (!rootNode.isExpanded())
{
rootNode.setExpanded(true);
}
rootNode.expandPath(translatedPath, 0);
}
}
/**
* Ensures that the node identified by the specified path is collapsed and
* viewable.
*
* @param path the TreePath identifying a node
*/
public void collapsePath(TreePath path, FacesContext context)
{
HtmlTreeNode node = findNode(path, context);
if (node != null)
{
node.setExpanded(false);
}
}
public boolean isExpanded(TreePath path, FacesContext context)
{
if (path == null)
{
return false;
}
return findNode(path, context) != null;
}
private HtmlTreeNode findNode(TreePath path, FacesContext context)
{
HtmlTreeNode node = getRootNode();
int[] translatedPath = HtmlTreeNode.translatePath(path, getModel(context));
for (int i = 0; i < translatedPath.length; i++)
{
if (!node.isExpanded())
{
return null;
}
int index = translatedPath[i];
node = (HtmlTreeNode) node.getChildren().get(index);
}
return node;
}
public TreePath getSelectionPath()
{
if (selectedPath == null)
{
return null;
}
return HtmlTreeNode.translatePath(selectedPath, getModel(FacesContext.getCurrentInstance()));
}
public void selectionChanged(HtmlTreeNode node)
{
TreePath oldPath = null;
if (selectedPath != null)
{
oldPath = HtmlTreeNode.translatePath(selectedPath, getModel(FacesContext.getCurrentInstance()));
}
selectedPath = node.getTranslatedPath();
if (node.isSelected())
{
queueEvent(new TreeSelectionEvent(this, oldPath, node.getPath()));
} else
{
queueEvent(new TreeSelectionEvent(this, oldPath, null));
}
}
private void createRootNode(FacesContext context)
{
HtmlTreeNode node;
TreeModel model = getModel(context);
Object root = model.getRoot();
node = (HtmlTreeNode) context.getApplication().createComponent(HtmlTreeNode.COMPONENT_TYPE);
String id = createUniqueId(context);
node.setId(id);
node.setPath(new TreePath(new Object[]{root}));
node.setUserObject(root);
node.setLayout(new int[]{HtmlTreeNode.CLOSED_SINGLE});
getFacets().put(FACET_ROOTNODE, node);
}
public HtmlTreeNode getRootNode()
{
return (HtmlTreeNode) getFacet(FACET_ROOTNODE);
}
public Object saveState(FacesContext context)
{
Object values[] = new Object[24];
values[0] = super.saveState(context);
values[1] = iconChildFirst;
values[2] = iconChildMiddle;
values[3] = iconChildLast;
values[4] = iconLine;
values[5] = iconNodeClose;
values[6] = iconNodeCloseFirst;
values[7] = iconNodeCloseLast;
values[8] = iconNodeCloseMiddle;
values[9] = iconNodeOpen;
values[10] = iconNodeOpenFirst;
values[11] = iconNodeOpenLast;
values[12] = iconNodeOpenMiddle;
values[13] = iconNoline;
values[14] = var;
values[15] = nodeClass;
values[16] = selectedNodeClass;
values[17] = new Integer(uniqueIdCounter);
values[18] = selectedPath;
values[19] = iconClass;
values[20] = new Integer(internalId);
values[21] = expireListeners;
values[22] = rowClasses;
values[23] = columnClasses;
return ((Object) (values));
}
public void restoreState(FacesContext context, Object state)
{
Object values[] = (Object[]) state;
super.restoreState(context, values[0]);
iconChildFirst = (String) values[1];
iconChildMiddle = (String) values[2];
iconChildLast = (String) values[3];
iconLine = (String) values[4];
iconNodeClose = (String) values[5];
iconNodeCloseFirst = (String) values[6];
iconNodeCloseLast = (String) values[7];
iconNodeCloseMiddle = (String) values[8];
iconNodeOpen = (String) values[9];
iconNodeOpenFirst = (String) values[10];
iconNodeOpenLast = (String) values[11];
iconNodeOpenMiddle = (String) values[12];
iconNoline = (String) values[13];
var = (String) values[14];
nodeClass = (String) values[15];
selectedNodeClass = (String) values[16];
uniqueIdCounter = ((Integer) values[17]).intValue();
selectedPath = (int[]) values[18];
iconClass = (String) values[19];
internalId = ((Integer) values[20]).intValue();
expireListeners = (Long) values[21];
rowClasses = (String) values[22];
columnClasses = (String) values[23];
addToModelListeners();
}
public void decode(FacesContext context)
{
super.decode(context);
//Save the current view root for later reference...
context.getExternalContext().getRequestMap().put(PREVIOUS_VIEW_ROOT, context.getViewRoot());
//...and remember that this instance needs NO special treatment on
// rendering:
itemStatesRestored = true;
}
public void processDecodes(FacesContext context)
{
addToModelListeners();
super.processDecodes(context);
}
public void processValidators(FacesContext context)
{
addToModelListeners();
super.processValidators(context);
}
public void processUpdates(FacesContext context)
{
addToModelListeners();
super.processUpdates(context);
}
public void encodeBegin(FacesContext context) throws IOException
{
addToModelListeners();
processModelEvents();
HtmlTreeNode node = getRootNode();
if (node == null)
{
createRootNode(context);
}
if (!itemStatesRestored)
{
UIViewRoot previousRoot = (UIViewRoot) context.getExternalContext().getRequestMap().get(PREVIOUS_VIEW_ROOT);
if (previousRoot != null)
{
restoreItemStates(context, previousRoot);
} else
{
//no previous root, means no decode was done
//--> a new request
}
}
super.encodeBegin(context);
}
public void encodeEnd(FacesContext context) throws IOException
{
super.encodeEnd(context);
}
public void restoreItemStates(FacesContext facesContext, UIViewRoot previousRoot)
{
HtmlTree previousTree = (HtmlTree) previousRoot.findComponent(getClientId(facesContext));
if (previousTree != null)
{
HtmlTreeNode node = previousTree.getRootNode();
if (node != null)
{
getRootNode().restoreItemState(node);
}
selectedPath = previousTree.selectedPath;
}
}
public void treeNodesChanged(TreeModelEvent e)
{
TreePath path = e.getTreePath();
FacesContext context = FacesContext.getCurrentInstance();
HtmlTreeNode node = findNode(path, context);
if (node != null)
{
node.childrenChanged(e.getChildIndices(), context);
}
}
public void treeNodesInserted(TreeModelEvent e)
{
TreePath path = e.getTreePath();
FacesContext context = FacesContext.getCurrentInstance();
HtmlTreeNode node = findNode(path, context);
if (node != null)
{
node.childrenAdded(e.getChildIndices(), context);
}
}
public void treeNodesRemoved(TreeModelEvent e)
{
TreePath path = e.getTreePath();
FacesContext context = FacesContext.getCurrentInstance();
HtmlTreeNode node = findNode(path, context);
if (node != null)
{
node.childrenRemoved(e.getChildIndices());
}
}
public void treeStructureChanged(TreeModelEvent e)
{
TreePath path = e.getTreePath();
FacesContext context = FacesContext.getCurrentInstance();
if (isExpanded(path, context))
{
collapsePath(path, context);
expandPath(path, context);
}
}
public boolean equals(Object obj)
{
if (!(obj instanceof HtmlTree))
{
return false;
}
HtmlTree other = (HtmlTree) obj;
return other.getId().equals(getId());
}
public int hashCode()
{
return getClientId(FacesContext.getCurrentInstance()).hashCode();
}
public void addToModelListeners()
{
Collection listeners = getModel(FacesContext.getCurrentInstance()).getTreeModelListeners();
long currentTime = System.currentTimeMillis();
boolean found = false;
for (Iterator iterator = listeners.iterator(); iterator.hasNext();)
{
ModelListener listener = (ModelListener) iterator.next();
if (listener.getId() == internalId)
{
found = true;
} else if (currentTime - listener.getLastAccessTime() > getExpireListeners())
{
iterator.remove();
}
}
if (!found)
{
listeners.add(new ModelListener(internalId));
}
}
private void processModelEvents()
{
Collection listeners = getModel(FacesContext.getCurrentInstance()).getTreeModelListeners();
for (Iterator iterator = listeners.iterator(); iterator.hasNext();)
{
ModelListener listener = (ModelListener) iterator.next();
if (listener.getId() == internalId)
{
for (Iterator events = listener.getEvents().iterator(); events.hasNext();)
{
Event event = (Event) events.next();
event.process(this);
events.remove();
}
break;
}
}
}
public void collapseAll()
{
HtmlTreeNode root = getRootNode();
FacesContext context = FacesContext.getCurrentInstance();
collapsePath(root.getPath(), context);
for (int i = 0; i < root.getChildren().size(); i++)
{
HtmlTreeNode child = (HtmlTreeNode) (root.getChildren().get(i));
collapsePath(child.getPath(), context);
if (!child.isLeaf(context))
{
collapseChildren(context, child);
}
}
}
private void collapseChildren(FacesContext context, HtmlTreeNode parent)
{
for (int i = 0; i < parent.getChildren().size(); i++)
{
HtmlTreeNode child = (HtmlTreeNode) (parent.getChildren().get(i));
collapsePath(child.getPath(), context);
if (!child.isLeaf(context))
{
collapseChildren(context, child);
}
}
}
public void expandAll()
{
HtmlTreeNode root = getRootNode();
FacesContext context = FacesContext.getCurrentInstance();
expandPath(root.getPath(), context);
for (int i = 0; i < root.getChildren().size(); i++)
{
HtmlTreeNode child = (HtmlTreeNode) (root.getChildren().get(i));
expandPath(child.getPath(), context);
if (!child.isLeaf(context))
{
expandChildren(context, child);
}
}
}
private void expandChildren(FacesContext context, HtmlTreeNode parent)
{
for (int i = 0; i < parent.getChildren().size(); i++)
{
HtmlTreeNode child = (HtmlTreeNode) (parent.getChildren().get(i));
expandPath(child.getPath(), context);
if (!child.isLeaf(context))
{
expandChildren(context, child);
}
}
}
private static class ModelListener implements TreeModelListener, Serializable
{
private long lastAccessTime = System.currentTimeMillis();
private LinkedList events = new LinkedList();
int id;
public ModelListener(int id)
{
this.id = id;
}
public List getEvents()
{
lastAccessTime = System.currentTimeMillis();
return events;
}
public int getId()
{
return id;
}
public long getLastAccessTime()
{
return lastAccessTime;
}
public void treeNodesChanged(TreeModelEvent e)
{
events.addLast(new Event(EVENT_CHANGED, e));
}
public void treeNodesInserted(TreeModelEvent e)
{
events.addLast(new Event(EVENT_INSERTED, e));
}
public void treeNodesRemoved(TreeModelEvent e)
{
events.addLast(new Event(EVENT_REMOVED, e));
}
public void treeStructureChanged(TreeModelEvent e)
{
events.addLast(new Event(EVENT_STRUCTURE_CHANGED, e));
}
}
private static class Event
{
private int kind;
private TreeModelEvent event;
public Event(int kind, TreeModelEvent event)
{
this.kind = kind;
this.event = event;
}
public void process(HtmlTree tree)
{
switch (kind)
{
case EVENT_CHANGED:
tree.treeNodesChanged(event);
break;
case EVENT_INSERTED:
tree.treeNodesInserted(event);
break;
case EVENT_REMOVED:
tree.treeNodesRemoved(event);
break;
case EVENT_STRUCTURE_CHANGED:
tree.treeStructureChanged(event);
break;
}
}
}
}