Class HashTreeModel<T>

All Implemented Interfaces:

public class HashTreeModel<T>
extends java.lang.Object
implements javax.swing.tree.TreeModel
A HashTreeModel is an implementation of the Swing TreeModel backed by a HashMap. Any objects can be added as nodes or the class can be parameterized so that only nodes belonging to some type may be added (noting that TreeModel methods will still use Object). An object may only be inserted into the tree once as enforced by Object.equals(java.lang.Object) as this causes problems with the JTree.
Jay Detwiler
  • Constructor Summary

    Constructor Description
    HashTreeModel​(T root)
    Create the HashTreeModel with the given object as root.
  • Method Summary

    Modifier and Type Method Description
    void addChild​(T parent, T child)
    Add a node to a parent.
    void addTreeModelListener​(javax.swing.event.TreeModelListener l)  
    T getChild​(java.lang.Object parent, int index)  
    int getChildCount​(java.lang.Object parent)  
    int getIndexOfChild​(java.lang.Object parent, java.lang.Object child)  
    T getRoot()
    Returns the root object.
    boolean isLeaf​(java.lang.Object node)  
    boolean isMember​(java.lang.Object node)
    Return true if the given node is a member of the tree.
    void removeChildren​(T node)  
    void removeNode​(T node)
    Remove a node from the tree.
    void removeTreeModelListener​(javax.swing.event.TreeModelListener l)  
    void valueForPathChanged​(javax.swing.tree.TreePath path, java.lang.Object newValue)  

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • HashTreeModel

      public HashTreeModel​(T root)
      Create the HashTreeModel with the given object as root.
      root - the root object
  • Method Details

    • getRoot

      public T getRoot()
      Returns the root object.
      Specified by:
      getRoot in interface javax.swing.tree.TreeModel
      the root object.
    • addChild

      public void addChild​(T parent, T child)
      Add a node to a parent. To be valid, the parent must be a member and the child must not be a member of the tree.
      parent - the node in the tree to add a new node to
      child - a node to add to the tree
      java.lang.IllegalArgumentException - if the parent is not a member or the child already is a member of the tree
      java.lang.NullPointerException - if either argument is null
    • removeNode

      public void removeNode​(T node)
      Remove a node from the tree. This removes the node and any children. The node must be a member of the tree and not the root.
      node - a node to remove
      java.lang.NullPointerException - if the node is null
      java.lang.IllegalArgumentException - if the node is not a member or if the node is the root of the tree
    • removeChildren

      public void removeChildren​(T node)
    • isMember

      public boolean isMember​(java.lang.Object node)
      Return true if the given node is a member of the tree.
      node - a node to test
      true if the given node is a member of the tree.
    • getChild

      public T getChild​(java.lang.Object parent, int index)
      Specified by:
      getChild in interface javax.swing.tree.TreeModel
    • getChildCount

      public int getChildCount​(java.lang.Object parent)
      Specified by:
      getChildCount in interface javax.swing.tree.TreeModel
    • isLeaf

      public boolean isLeaf​(java.lang.Object node)
      Specified by:
      isLeaf in interface javax.swing.tree.TreeModel
    • valueForPathChanged

      public void valueForPathChanged​(javax.swing.tree.TreePath path, java.lang.Object newValue)
      Specified by:
      valueForPathChanged in interface javax.swing.tree.TreeModel
    • getIndexOfChild

      public int getIndexOfChild​(java.lang.Object parent, java.lang.Object child)
      Specified by:
      getIndexOfChild in interface javax.swing.tree.TreeModel
    • addTreeModelListener

      public void addTreeModelListener​(javax.swing.event.TreeModelListener l)
      Specified by:
      addTreeModelListener in interface javax.swing.tree.TreeModel
    • removeTreeModelListener

      public void removeTreeModelListener​(javax.swing.event.TreeModelListener l)
      Specified by:
      removeTreeModelListener in interface javax.swing.tree.TreeModel