зеркало из https://github.com/mozilla/gecko-dev.git
107 строки
2.4 KiB
Java
107 строки
2.4 KiB
Java
/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is the Grendel mail/news client.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1997
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* Netscape Communications Corporation. All Rights Reserved.
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*
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* Created: Will Scullin <scullin@netscape.com>, 28 Aug 1997.
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*/
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package grendel.widgets;
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import java.util.Vector;
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/**
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* Object that represents the path through a tree to a node.
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* Provides equals and hash methods to ensure expected behaviors.
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*
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* @author Will Scullin
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*/
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public class TreePath {
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Object fPath[];
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/**
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* Constructs a TreePath from an array of nodes
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*/
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public TreePath(Object aPath[]) {
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fPath = aPath;
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}
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/**
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* Constructs a TreePath from a Vector of nodes
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*/
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public TreePath(Vector aPath) {
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fPath = new Object[aPath.size()];
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aPath.copyInto(fPath);
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}
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/**
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* Returns the tree path associated with this object.
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*/
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public Object[] getPath() {
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return fPath;
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}
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/**
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* Returns the last node in the path
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*/
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public Object getTip() {
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return fPath[fPath.length - 1];
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}
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/**
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* Returns the length of the path
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*/
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public int getLength() {
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return fPath.length;
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}
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/**
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* Overloaded so that different objects with same contents
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* are considered equal.
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*/
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public boolean equals(Object aObject) {
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if (aObject instanceof TreePath) {
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Object path[] = ((TreePath) aObject).getPath();
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int length = path.length;
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if (length == fPath.length) {
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for (int i = length - 1; i >= 0; i--) {
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if (path[i] != fPath[i]) {
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return false;
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}
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}
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return true;
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}
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}
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return false;
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}
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/**
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* Overloaded so different objects with the same contents hash
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* to the same value
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*/
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public int hashCode() {
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return getTip().hashCode();
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}
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}
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