XMLBoolRef.java

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00001 
00002 //
00003 // XML storage classes version 1.2
00004 //
00005 // XMLBoolRef.java
00006 //
00007 // Copyright (c) 2004, 2005 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  * XMLBoolRef is a type converter for boolean data with write access.
00044  */
00045 public class XMLBoolRef
00046 {
00047     public XMLBoolRef(XMLNode node, final String attrName)
00048     {
00049         this(node, attrName, false);
00050     }
00051 
00052     public XMLBoolRef(XMLNode node, final String attrName, boolean def/*=false*/)
00053     {
00054         _node = node;
00055         _attrName = attrName;
00056 
00057         if (node != null)
00058             if (node.get(attrName).length() == 0)
00059                 assign(def);
00060     }
00061 
00062     /**
00063      * @return boolean value of referenced node
00064      */
00065     public boolean boolValue()
00066     {
00067         if (_node != null)
00068             return Boolean.valueOf(_node.get(_attrName)).booleanValue();
00069         else
00070             return false;
00071     }
00072 
00073     /**
00074      * Set boolean value in referenced node.
00075      * @param value
00076      */
00077     public void assign(boolean value)
00078     {
00079         if (_node != null)
00080             _node.put(_attrName, String.valueOf(value));
00081     }
00082 
00083     protected final XMLNode _node;
00084     protected final String _attrName;
00085 }