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// $Id: TreeModelComposite.java,v 1.19 2004/09/03 19:28:46 mvw Exp $
// Copyright (c) 1996-99 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason.  IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package org.argouml.ui;

import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;

import org.apache.log4j.Logger;

/**
 * This class is the TreeModel for the navigator and todo list panels.
 *
 * 

It is called Composite because there are a set of rules * that determine how to link parents to children in the tree. Those * rules can now be found in PerspectiveSupport. * *

$Id: TreeModelComposite.java,v 1.19 2004/09/03 19:28:46 mvw Exp $ */ public class TreeModelComposite extends TreeModelSupport implements TreeModel { private static final Logger LOG = Logger.getLogger(TreeModelComposite.class); /** The root of the model. */ private Object root; //////////////////////////////////////////////////////////////// // contructors /** * The constructor. * * @param name the name that will be localized */ public TreeModelComposite(String name) { super(name); } //////////////////////////////////////////////////////////////// // TreeModel implementation /** Getter for the root of the model. * @see javax.swing.tree.TreeModel#getRoot() */ public Object getRoot() { return root; } /** * Finds the each of the children of a parent in the tree. * * @param parent in the tree * @param index of child to find * @return the child found at index. Null if index is out of bounds. */ public Object getChild(Object parent, int index) { int nSubs = getGoRules().size(); for (int i = 0; i < nSubs; i++) { TreeModel tm = (TreeModel) getGoRules().elementAt(i); int childCount = tm.getChildCount(parent); if (index < childCount) { return tm.getChild(parent, index); } index -= childCount; } return null; } /** * @see javax.swing.tree.TreeModel#getChildCount(java.lang.Object) */ public int getChildCount(Object parent) { int childCount = 0; int nSubs = getGoRules().size(); for (int i = 0; i < nSubs; i++) { TreeModel tm = (TreeModel) getGoRules().elementAt(i); childCount += tm.getChildCount(parent); } return childCount; } /** * @see javax.swing.tree.TreeModel#getIndexOfChild(java.lang.Object, * java.lang.Object) */ public int getIndexOfChild(Object parent, Object child) { int childCount = 0; int nSubs = getGoRules().size(); for (int i = 0; i < nSubs; i++) { TreeModel tm = (TreeModel) getGoRules().elementAt(i); int childIndex = tm.getIndexOfChild(parent, child); if (childIndex != -1) { return childIndex + childCount; } childCount += tm.getChildCount(parent); } LOG.debug("child not found!"); //The child is sometimes not found when the tree is being updated return -1; } /** * 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. *

* If none of the subTreeModels is not a leaf, then we are not a leaf. * * @param node a node in the tree, obtained from this data source * @return true if node is a leaf */ public boolean isLeaf(Object node) { int nSubs = getGoRules().size(); for (int i = 0; i < nSubs; i++) { TreeModel tm = (TreeModel) getGoRules().elementAt(i); if (!tm.isLeaf(node)) return false; } return true; } /** * Empty implementation - not used. * *

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. * * @param path path to the node that the user has altered. * @param newValue the new value from the TreeCellEditor. */ public void valueForPathChanged(TreePath path, Object newValue) { } //////////////////////////////////////////////////////////////// // other methods /** * @param r the root of the model */ public void setRoot(Object r) { root = r; } } /* end class TreeModelComposite */

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