encodexml.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
* Copyright (c) 2006, University of Kent
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this 
* list of conditions and the following disclaimer.
* 
* Redistributions in binary form must reproduce the above copyright notice, 
* this list of conditions and the following disclaimer in the documentation 
* and/or other materials provided with the distribution. 
*
* 1. Neither the name of the University of Kent nor the names of its 
* contributors may be used to endorse or promote products derived from this 
* software without specific prior written permission. 
*
* 2. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS  
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
* PURPOSE ARE DISCLAIMED. 
*
* 3. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
* POSSIBILITY OF SUCH DAMAGE.
*
* 4. YOU AGREE THAT THE EXCLUSIONS IN PARAGRAPHS 2 AND 3 ABOVE ARE REASONABLE
* IN THE CIRCUMSTANCES.  IN PARTICULAR, YOU ACKNOWLEDGE (1) THAT THIS
* SOFTWARE HAS BEEN MADE AVAILABLE TO YOU FREE OF CHARGE, (2) THAT THIS
* SOFTWARE IS NOT "PRODUCT" QUALITY, BUT HAS BEEN PRODUCED BY A RESEARCH
* GROUP WHO DESIRE TO MAKE THIS SOFTWARE FREELY AVAILABLE TO PEOPLE WHO WISH
* TO USE IT, AND (3) THAT BECAUSE THIS SOFTWARE IS NOT OF "PRODUCT" QUALITY
* IT IS INEVITABLE THAT THERE WILL BE BUGS AND ERRORS, AND POSSIBLY MORE
* SERIOUS FAULTS, IN THIS SOFTWARE.
*
* 5. This license is governed, except to the extent that local laws
* necessarily apply, by the laws of England and Wales.
*/
/*
 * EncodeXML.java
 *
 * Created on 17 March 2006, 18:38
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package issrg.web.service;

import org.w3c.dom.*;
/**
 *
 * @author ls97
 */
public class EncodeXML {
    
    /** Creates a new instance of EncodeXML */
    public EncodeXML() {
    }
    
    public String encode(Node ele, int indent) {
        String prefix = new String();
        for (int i=0;i<indent;i++) prefix +=" ";
        String buf = new String();
        if (!Text.class.isAssignableFrom(ele.getClass())) {
            buf +=prefix+"<"+ele.getNodeName();
            NamedNodeMap atts = ele.getAttributes();
            for (int i=0;i<atts.getLength();i++) {
                Node node = atts.item(i);
                buf +=" "+node.getNodeName()+"="+'"'+node.getNodeValue()+'"';
            }
            if (ele.getChildNodes().getLength()>0) buf +=">\r\n";
            else buf +="/>\r\n";
        } else buf +=prefix+ele.getNodeValue()+"\r\n";
        NodeList children = ele.getChildNodes();
        for (int i=0;i<children.getLength();i++) {
            Node node = children.item(i);
            buf +=this.encode(node,indent+4);
        }
        if (children.getLength()>0) buf +=prefix+"</"+ele.getNodeName()+">\r\n";
        return buf;
    }    
}