net.percederberg.mib
Class MIBTreeModel

java.lang.Object
  |
  +--net.percederberg.mib.MIBTreeModel
All Implemented Interfaces:
javax.swing.tree.TreeModel

public class MIBTreeModel
extends java.lang.Object
implements javax.swing.tree.TreeModel

This class is a TreeModel interface to the MIB symbol tree. It supports being inserted in TreeModel components, and makes no changes to the symbols.

Author:
Per Cederberg, per@percederberg.net

Constructor Summary
MIBTreeModel(MIB mib)
          Creates a parse tree with the given parameters.
 
Method Summary
 void addTreeModelListener(javax.swing.event.TreeModelListener l)
          Adds a listener for the TreeModelEvent posted after the tree changes.
 java.lang.Object getChild(java.lang.Object parent, int index)
          Returns the child of parent at index index in the parent's child array.
 int getChildCount(java.lang.Object parent)
          Returns the number of children of parent.
 int getIndexOfChild(java.lang.Object parent, java.lang.Object child)
          Returns the index of child in parent.
 java.lang.Object getRoot()
          Returns the root of the tree.
 boolean isLeaf(java.lang.Object node)
          Returns true if node is a leaf.
 void removeTreeModelListener(javax.swing.event.TreeModelListener l)
          Removes a listener previously added with addTreeModelListener().
 void valueForPathChanged(javax.swing.tree.TreePath path, java.lang.Object newValue)
          Messaged when the user has altered the value for the item identified by path to newValue.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MIBTreeModel

public MIBTreeModel(MIB mib)
Creates a parse tree with the given parameters.
Parameters:
mib - the MIB object
Method Detail

getRoot

public java.lang.Object getRoot()
Returns the root of the tree. Returns null only if the tree has no nodes.
Specified by:
getRoot in interface javax.swing.tree.TreeModel
Returns:
the root of the tree

getChild

public java.lang.Object getChild(java.lang.Object parent,
                                 int index)
Returns the child of parent at index index in the parent's child array. parent must be a node previously obtained from this data source. This should not return null if index is a valid index for parent (that is index >= 0 && index < getChildCount(parent)).
Specified by:
getChild in interface javax.swing.tree.TreeModel
Parameters:
parent - a node in the tree, obtained from this data source
index - the child index
Returns:
the child of parent at index index

getChildCount

public int getChildCount(java.lang.Object parent)
Returns the number of children of parent. Returns 0 if the node is a leaf or if it has no children. parent must be a node previously obtained from this data source.
Specified by:
getChildCount in interface javax.swing.tree.TreeModel
Parameters:
parent - a node in the tree, obtained from this data source
Returns:
the number of children of the node parent

isLeaf

public boolean isLeaf(java.lang.Object node)
Returns true if node is a leaf. It is possible for this method to return false even if node has no children. A directory in a filesystem, for example, may contain no files; the node representing the directory is not a leaf, but it also has no children.
Specified by:
isLeaf in interface javax.swing.tree.TreeModel
Parameters:
node - a node in the tree, obtained from this data source
Returns:
true if node is a leaf

valueForPathChanged

public void valueForPathChanged(javax.swing.tree.TreePath path,
                                java.lang.Object newValue)
Messaged when the user has altered the value for the item identified by path to newValue. If newValue signifies a truly new value the model should post a treeNodesChanged event.
Specified by:
valueForPathChanged in interface javax.swing.tree.TreeModel
Parameters:
path - path to the node that the user has altered.
newValue - the new value from the TreeCellEditor.

getIndexOfChild

public int getIndexOfChild(java.lang.Object parent,
                           java.lang.Object child)
Returns the index of child in parent.
Specified by:
getIndexOfChild in interface javax.swing.tree.TreeModel
Parameters:
parent - the parent node
child - the child node
Returns:
the child index, or -1 if not present

addTreeModelListener

public void addTreeModelListener(javax.swing.event.TreeModelListener l)
Adds a listener for the TreeModelEvent posted after the tree changes.
Specified by:
addTreeModelListener in interface javax.swing.tree.TreeModel
Parameters:
l - the listener to add
See Also:
removeTreeModelListener(javax.swing.event.TreeModelListener)

removeTreeModelListener

public void removeTreeModelListener(javax.swing.event.TreeModelListener l)
Removes a listener previously added with addTreeModelListener().
Specified by:
removeTreeModelListener in interface javax.swing.tree.TreeModel
Parameters:
l - the listener to remove
See Also:
addTreeModelListener(javax.swing.event.TreeModelListener)