NameGenerator.java
资源名称:swingx.zip [点击查看]
上传用户:zhengdagz
上传日期:2014-03-06
资源大小:1956k
文件大小:2k
源码类别:
xml/soap/webservice
开发平台:
Java
- /*
- * $Id: NameGenerator.java,v 1.5 2005/10/15 20:06:50 rbair Exp $
- *
- * Copyright 2005 Sun Microsystems, Inc., 4150 Network Circle,
- * Santa Clara, California 95054, U.S.A. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
- package org.jdesktop.dataset;
- import java.util.Map;
- import java.util.WeakHashMap;
- /**
- * Generates unique names. Give it a prefix, it adds a numeric postfix.
- * Simple use:
- * <pre>
- * NameGenerator ng = new NameGenerator("DATA_TABLE");
- * String newName = ng.generateName(ng);
- * String newName2 = ng.generateName(ng);
- * String newName3 = ng.generateName(ng);
- * </pre>
- *
- * @author rbair
- */
- class NameGenerator {
- /** The prefix for all names generated by this instance. */
- private String prefix;
- private int postfix = 1;
- /**
- * Creates a new instance of NameGenerator.
- *
- * @param prefix The prefix for all new names generated by this instance.
- */
- public NameGenerator(String prefix) {
- this.prefix = prefix;
- }
- /**
- * Generates a new unique name based on the prefix. The object reference is used
- * to associate with the generated name. The object reference is kept in a
- * weak reference, so that when this object retains the last reference to
- * obj, the generated name can be removed automatically; generated names are thus
- * unique by NG instance + object instance.
- *
- * @param obj The object to use as a tracker for unique names.
- * @return a unique name beginning with the prefix given in the constructor.
- */
- public String generateName(Object obj) {
- return prefix + postfix++;
- }
- }