XMLStringRef.java

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00001 
00002 //
00003 // XML storage classes version 1.5
00004 //
00005 // XMLStringRef.java
00006 //
00007 // Copyright (c) 2004, 2005, 2010 Martin Fuchs <martin-fuchs@gmx.net>
00008 //
00009 
00010 
00011 /*
00012 
00013  All rights reserved.
00014 
00015  Redistribution and use in source and binary forms, with or without
00016  modification, are permitted provided that the following conditions are met:
00017 
00018  * Redistributions of source code must retain the above copyright
00019     notice, this list of conditions and the following disclaimer.
00020  * Redistributions in binary form must reproduce the above copyright
00021     notice, this list of conditions and the following disclaimer in
00022     the documentation and/or other materials provided with the
00023     distribution.
00024 
00025  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00026  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00027  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00028  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00029  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00030  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00031  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00032  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00033  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00034  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00035  POSSIBILITY OF SUCH DAMAGE.
00036 
00037 */
00038 
00039 package de.mfuchs.xmlstorage;
00040 
00041 
00042 /**
00043  * XMLStringRef is used to provide write access to XML attribute values.
00044  */
00045 public class XMLStringRef
00046 {
00047     public XMLStringRef(final XMLNode node, final String attrName)
00048     {
00049         this(node, attrName, "");
00050     }
00051 
00052     public XMLStringRef(final XMLPos pos, final String attrName)
00053     {
00054         this(pos.cur(), attrName, "");
00055     }
00056 
00057     public XMLStringRef(final XMLNode node, final String attrName, final String def/*=""*/)
00058     {
00059         _node = node;
00060         _attrName = attrName;
00061 
00062         if (node != null)
00063             if (node.get(attrName).length() == 0)
00064                 assign(def);
00065     }
00066 
00067     public XMLStringRef(final XMLPos pos, final String attrName, final String def/*=""*/)
00068     {
00069         this(pos.cur(), attrName, def);
00070     }
00071 
00072     public String toString()
00073     {
00074         if (_node != null)
00075             return _node.get(_attrName);
00076         else
00077             return "";
00078     }
00079 
00080     public void assign(final String value)
00081     {
00082         if (_node != null)
00083             _node.put(_attrName, value);
00084     }
00085 
00086     protected final XMLNode _node;
00087     protected final String _attrName;
00088 }