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Class com.sun.java.swing.JTree.DynamicUtilTreeNode

java.lang.Object
  |
  +--com.sun.java.swing.tree.DefaultMutableTreeNode
        |
        +--com.sun.java.swing.JTree.DynamicUtilTreeNode

public static class JTree.DynamicUtilTreeNode

extends DefaultMutableTreeNode

DynamicUtilTreeNode can wrap vectors/hashtables/arrays/strings and create the appropriate children tree nodes as necessary. It is dynamic in that it'll only create the children as necessary.

Warning: serialized objects of this class will not be compatible with future swing releases. The current serialization support is appropriate for short term storage or RMI between Swing1.0 applications. It will not be possible to load serialized Swing1.0 objects with future releases of Swing. The JDK1.2 release of Swing will be the compatibility baseline for the serialized form of Swing objects.

See Also:

Serialized Form

Field Summary

java.lang.Object	childValue Value to create children with.
boolean	hasChildren
boolean	loadedChildren

Fields inherited from class com.sun.java.swing.tree.DefaultMutableTreeNode

allowsChildren, children, EMPTY_ENUMERATION, parent, userObject

Constructor Summary

JTree.DynamicUtilTreeNode(java.lang.Object value, java.lang.Object children)
Creates a node with the specified object as its value and with the specified children.

Method Summary

static void	createChildren(DefaultMutableTreeNode parent, java.lang.Object children) Adds to parent all the children in children.
int	getChildCount() Returns the number of child nodes.
boolean	isLeaf() Returns true if this node allows children.
void	loadChildren() Loads the children based on childValue.

Methods inherited from class com.sun.java.swing.tree.DefaultMutableTreeNode

add, breadthFirstEnumeration, children, clone, depthFirstEnumeration, getAllowsChildren, getChildAfter, getChildAt, getChildBefore, getChildCount, getDepth, getFirstChild, getFirstLeaf, getIndex, getLastChild, getLastLeaf, getLeafCount, getLevel, getNextLeaf, getNextNode, getNextSibling, getParent, getPath, getPathToRoot, getPreviousLeaf, getPreviousNode, getPreviousSibling, getRoot, getSharedAncestor, getSiblingCount, getUserObject, getUserObjectPath, insert, isLeaf, isNodeAncestor, isNodeChild, isNodeDescendant, isNodeRelated, isNodeSibling, isRoot, pathFromAncestorEnumeration, postorderEnumeration, preorderEnumeration, removeAllChildren, remove, remove, removeFromParent, setAllowsChildren, setParent, setUserObject, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notifyAll, notify, toString, wait, wait, wait

Field Detail

hasChildren

protected boolean hasChildren

childValue

protected java.lang.Object childValue

Value to create children with.

loadedChildren

protected boolean loadedChildren

Constructor Detail

JTree.DynamicUtilTreeNode

public JTree.DynamicUtilTreeNode(java.lang.Object value,
                                 java.lang.Object children)

Creates a node with the specified object as its value and with the specified children. For the node to allow children, the children-object must be an array of objects, a Vector, or a Hashtable -- even if empty. Otherwise, the node is not allowed to have children.

Parameters:

value - the Object that is the value for the new node

children - an array of Objects, a Vector, or a Hashtable used to create the child nodes. If any other object is specified, or if the value is null, then the node is not allowed to have children.

Method Detail

createChildren

public static void createChildren(DefaultMutableTreeNode parent,
                                  java.lang.Object children)

Adds to parent all the children in children. If children is an array or Vector all of its elements are added is children, otherwise if children is a Hashtable all the key/value pairs are added in the order Enumeration returns them.

isLeaf

public boolean isLeaf()

Returns true if this node allows children. Whether the node allows children depends on how it was created.

Returns:

true if this node allows children, false otherwise.

Overrides:

isLeaf in class DefaultMutableTreeNode

See Also:

JTree.DynamicUtilTreeNode#DynamicUtilTreeNode(Object, Object)

getChildCount

public int getChildCount()

Returns the number of child nodes.

Returns:

the number of child nodes

Overrides:

getChildCount in class DefaultMutableTreeNode

loadChildren

protected void loadChildren()

Loads the children based on childValue. If childValue is a Vector orarray each element added as a child, if childValue is a Hashtable each key/value pair is added in the order that Enumeration returns the keys.