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## org.apache.myfaces.custom.tree2
Class UITreeData

    java.lang.Object
      javax.faces.component.UIComponent
          javax.faces.component.UIComponentBase
              org.apache.myfaces.custom.tree2.UITreeData

All Implemented Interfaces:
  javax.faces.component.NamingContainer, javax.faces.component.StateHolder

Direct Known Subclasses:
  HtmlTree

public class UITreeData
extends javax.faces.component.UIComponentBase
implements javax.faces.component.NamingContainer

TreeData is a `UIComponent` that supports binding data stored in a tree represented by a `TreeNode` instance. During iterative processing over the tree nodes in the data model, the object for the current node is exposed as a request attribute under the key specified by the `var` property. `Renderer`s of this component should use the appropriate facet to assist in rendering.

Version:
  $Revision: 291921 $ $Date: 2005-09-27 08:08:36 -0400 (Tue, 27 Sep 2005) $
Author:
  Sean Schofield, Hans Bergsten (Some code taken from an example in his O'Reilly JavaServer Faces book. Copied with permission)

Field Summary
`static java.lang.String` | `COMPONENT_FAMILY`
`static java.lang.String` | `COMPONENT_TYPE`

Fields inherited from interface javax.faces.component.NamingContainer
`SEPARATOR_CHAR`

Constructor Summary
`UITreeData()` Constructor

Method Summary
`void` | `broadcast(javax.faces.event.FacesEvent event)`
`void` | `collapsePath(java.lang.String[] nodePath)` Expands all of the nodes in the specfied path.
`void` | `encodeBegin(javax.faces.context.FacesContext context)`
`void` | `expandAll()` Epands all nodes by default.
`void` | `expandPath(java.lang.String[] nodePath)` Expands all of the nodes in the specfied path.
`java.lang.String` | `getClientId(javax.faces.context.FacesContext context)`
`TreeModel` | `getDataModel()` Returns a previously cached `TreeModel`, if any, or sets the cache variable to either the current value (if its a `TreeModel`) or to a new instance of `TreeModel` (if it's a `TreeNode`) with the provided value object as the root node.
`java.lang.String` | `getFamily()`
`TreeNode` | `getNode()` Calls through to the `TreeModel` and returns the current `TreeNode` or `null`.
`java.lang.String` | `getNodeId()`
`java.lang.String[]` | `getPathInformation(java.lang.String nodeId)` Gets an array of String containing the ID's of all of the `TreeNode`s in the path to the specified node.
`java.lang.Object` | `getValue()` Gets the value of the TreeData.
`java.lang.String` | `getVar()` Return the request-scope attribute under which the data object for the current node will be exposed when iterating.
`boolean` | `isLastChild(java.lang.String nodeId)` Indicates whether or not the specified `TreeNode` is the last child in the `List` of children.
`boolean` | `isNodeExpanded()` Indicates whether or not the current `TreeNode` is expanded.
`protected void` | `processChildNodes(javax.faces.context.FacesContext context, TreeNode parentNode, int processAction)` Process the child nodes of the supplied parent `TreeNode`.
`void` | `processDecodes(javax.faces.context.FacesContext context)`
`void` | `processUpdates(javax.faces.context.FacesContext context)`
`void` | `processValidators(javax.faces.context.FacesContext context)`
`void` | `queueEvent(javax.faces.event.FacesEvent event)`
`void` | `restoreState(javax.faces.context.FacesContext context, java.lang.Object state)`
`java.lang.Object` | `saveState(javax.faces.context.FacesContext context)`
`void` | `setNodeId(java.lang.String nodeId)`
`void` | `setValue(java.lang.Object value)` Sets the value of the TreeData.
`void` | `setValueBinding(java.lang.String name, javax.faces.el.ValueBinding binding)`
`void` | `setVar(java.lang.String var)` Set the request-scope attribute under which the data object for the current node wil be exposed when iterating.
`void` | `toggleExpanded()` Toggle the expanded state of the current node.

Methods inherited from class javax.faces.component.UIComponentBase
`addFacesListener, decode, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getFacesContext, getFacesListeners, getFacet, getFacets, getFacetsAndChildren, getId, getParent, getRenderer, getRendererType, getRendersChildren, getValueBinding, isRendered, isTransient, processRestoreState, processSaveState, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### COMPONENT_TYPE

    public static final java.lang.String COMPONENT_TYPE

See Also:
  Constant Field Values

### COMPONENT_FAMILY

    public static final java.lang.String COMPONENT_FAMILY

See Also:
  Constant Field Values

Constructor Detail

### UITreeData

    public UITreeData()

  Constructor

Method Detail

### getFamily

    public java.lang.String getFamily()

### saveState

    public java.lang.Object saveState(javax.faces.context.FacesContext context)

  Specified by:
    `saveState` in interface `javax.faces.component.StateHolder`

### restoreState

    public void restoreState(javax.faces.context.FacesContext context,
                             java.lang.Object state)

  Specified by:
    `restoreState` in interface `javax.faces.component.StateHolder`

### queueEvent

    public void queueEvent(javax.faces.event.FacesEvent event)

### broadcast

    public void broadcast(javax.faces.event.FacesEvent event)
                   throws javax.faces.event.AbortProcessingException

  Throws:
    `javax.faces.event.AbortProcessingException`

### processDecodes

    public void processDecodes(javax.faces.context.FacesContext context)

### processValidators

    public void processValidators(javax.faces.context.FacesContext context)

### processUpdates

    public void processUpdates(javax.faces.context.FacesContext context)

### getClientId

    public java.lang.String getClientId(javax.faces.context.FacesContext context)

### setValueBinding

    public void setValueBinding(java.lang.String name,
                                javax.faces.el.ValueBinding binding)

### encodeBegin

    public void encodeBegin(javax.faces.context.FacesContext context)
                     throws java.io.IOException

  Throws:
    `java.io.IOException`

### setValue

    public void setValue(java.lang.Object value)

  Sets the value of the TreeData.

  Parameters:
    `value` - The new value

### getValue

    public java.lang.Object getValue()

  Gets the value of the TreeData.

  Returns:
    The value

### setVar

    public void setVar(java.lang.String var)

  Set the request-scope attribute under which the data object for the current node wil be exposed when iterating.

  Parameters:
    `var` - The new request-scope attribute name

### getVar

    public java.lang.String getVar()

  Return the request-scope attribute under which the data object for the current node will be exposed when iterating. This property is not enabled for value binding expressions.

  Returns:
    The iterrator attribute

### getNode

    public TreeNode getNode()

  Calls through to the `TreeModel` and returns the current `TreeNode` or `null`.

  Returns:
    The current node

### getNodeId

    public java.lang.String getNodeId()

### setNodeId

    public void setNodeId(java.lang.String nodeId)

### getPathInformation

    public java.lang.String[] getPathInformation(java.lang.String nodeId)

  Gets an array of String containing the ID's of all of the `TreeNode`s in the path to the specified node. The path information will be an array of `String` objects representing node ID's. The array will starting with the ID of the root node and end with the ID of the specified node.

  Parameters:
    `nodeId` - The id of the node for whom the path information is needed.
  Returns:
    String[]

### isLastChild

    public boolean isLastChild(java.lang.String nodeId)

  Indicates whether or not the specified `TreeNode` is the last child in the `List` of children. If the node id provided corresponds to the root node, this returns `true`.

  Parameters:
    `nodeId` - The ID of the node to check
  Returns:
    boolean

### getDataModel

    public TreeModel getDataModel()

  Returns a previously cached `TreeModel`, if any, or sets the cache variable to either the current value (if its a `TreeModel`) or to a new instance of `TreeModel` (if it's a `TreeNode`) with the provided value object as the root node.

  Returns:
    TreeModel

### expandAll

    public void expandAll()

  Epands all nodes by default.

### expandPath

    public void expandPath(java.lang.String[] nodePath)

  Expands all of the nodes in the specfied path.

  Parameters:
    `nodePath` - The path to expand.

### collapsePath

    public void collapsePath(java.lang.String[] nodePath)

  Expands all of the nodes in the specfied path.

  Parameters:
    `nodePath` - The path to expand.

### processChildNodes

    protected void processChildNodes(javax.faces.context.FacesContext context,
                                     TreeNode parentNode,
                                     int processAction)

  Process the child nodes of the supplied parent `TreeNode`. This method is protected so that it can be overriden by a subclass that may want to control how child nodes are processed.

  Parameters:
    `context` - FacesContext
    `parentNode` - The parent node whose children are to be processed
    `processAction` - An `int` representing the type of action to process

### toggleExpanded

    public void toggleExpanded()

  Toggle the expanded state of the current node.

### isNodeExpanded

    public boolean isNodeExpanded()

  Indicates whether or not the current `TreeNode` is expanded.

  Returns:
    boolean

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