/**
* Returns the index of child in parent. If <code>parent</code> is <code>null</code> or <code>
* child</code> is <code>null</code>, returns -1.
*
* @param parent a note in the tree, obtained from this data source
* @param child the node we are interested in
* @return the index of the child in the parent, or -1 if either <code>child</code> or <code>
* parent</code> are <code>null</code>
*/
public int getIndexOfChild(Object parent, Object child) {
if (parent instanceof CatalogDirectory && child instanceof Catalog) {
CatalogDirectory catDir = (CatalogDirectory) parent;
Catalog cat = (Catalog) child;
return catDir.indexOf(cat);
}
return -1;
}
// Return a tree model event for an operation of the given catalog
private TreeModelEvent _getTreeModelEvent(Catalog cat) {
Object source = this;
CatalogDirectory catDir = cat.getParent();
Object[] path = null;
int[] childIndices = null;
Object[] children = null;
if (catDir == null) {
// must be the tree root
path = new Catalog[1];
path[0] = cat;
childIndices = new int[] {0};
} else {
path = getPath(catDir);
childIndices = new int[] {catDir.indexOf(cat)};
}
children = new Object[] {cat};
return new TreeModelEvent(source, path, childIndices, children);
}
