client/javacli/XMLStreamParser.java

//---PACKAGE DECLARATION---

//---IMPORTS---
import java.io.*;
import java.util.ArrayList;

import org.xml.sax.*;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;

/**
 * XMLStreamParser - Used to build XMLPacket objects.
 *
 * @author  $Author:  $
 * @version $Id:  $
 */
public class XMLStreamParser extends HandlerBase {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision:  $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Constructor for the XMLStreamParser.
     */
    public XMLStreamParser (XMLPacket packet) {
        _packet = packet;
    }

//---PUBLIC METHODS---


    public void startDocument () throws SAXException {
        //System.out.println("Packet found");
    }

    public void endDocument () throws SAXException {
        //System.out.println("Packet Ended");
    }

    /**
     * Add each tag's attribute to the XMLPacket.
     * Note that all attributes within an opening tag are
     * stored as "someroot.sometag.attributes.attribute_name"
     * E.g. If <packet> is the root node, then:
     *     <packet machine_name="raptor">
     * is stored as:
     *     "packet.attributes.machine_name"
     * within the XMLPacket.
     */
    public void startElement (String name, AttributeList attrs) throws SAXException {
        _indentLevel++;
        _tagList.add(name);
        if (attrs != null) {
            for (int i = 0; i < attrs.getLength (); i++) {
                _packet.addParam(getPath()+".attributes."+attrs.getName(i), attrs.getValue(i));
            }
        }
    }

    /**
     * When an XML element is finished with, we must remove
     * the tag name from the tagList and decrement the indent
     * level.
     */
    public void endElement (String name) throws SAXException {
        _tagList.remove(_tagList.size()-1);    
        _indentLevel--;
    }

    /**
     * Any text falling within a pair of terminal tags must
     * be added to the XMLPacket.  Trim leading and trailing
     * spaces and do not bother to add if there is no data
     * specified within the tags.
     */
    public void characters (char[] buf, int offset, int len) throws SAXException {
        String s = new String(buf, offset, len);
        if (!s.trim().equals("")) {
            _packet.addParam(getPath(), s);
        }
    }

//---PRIVATE METHODS---
    
    /**
     * Return the heirarchical string to be used as a key value
     * in the XMLPacket.
     */
    private String getPath () {
        String path = (String)_tagList.get(0);
        if (_tagList.size() > 0) {
            for (int i = 1 ; i < _tagList.size() ; i++) {
                path = path + "." + (String)_tagList.get(i);
            }
        }
        return path;
    }

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

    private int _indentLevel = 0;
    private ArrayList _tagList = new ArrayList();
    private XMLPacket _packet;

//---STATIC ATTRIBUTES---

}
Revision:	1.1
Committed:	Sun Jan 14 21:58:11 2001 UTC (23 years, 8 months ago) by pjm2
Branch:	MAIN
CVS Tags:	PROJECT_COMPLETION
Log Message:	Basic command line client to the server's clientinterface. Currently displays machine name, ip and load values.
#	User	Rev	Content
1	pjm2	1.1	//---PACKAGE DECLARATION---
2
3			//---IMPORTS---
4			import java.io.*;
5			import java.util.ArrayList;
6
7			import org.xml.sax.*;
8			import javax.xml.parsers.SAXParserFactory;
9			import javax.xml.parsers.ParserConfigurationException;
10			import javax.xml.parsers.SAXParser;
11
12			/**
13			* XMLStreamParser - Used to build XMLPacket objects.
14			*
15			* @author $Author: $
16			* @version $Id: $
17			*/
18			public class XMLStreamParser extends HandlerBase {
19
20			//---FINAL ATTRIBUTES---
21
22			/**
23			* The current CVS revision of this class
24			*/
25			public final String REVISION = "$Revision: $";
26
27			//---STATIC METHODS---
28
29			//---CONSTRUCTORS---
30
31			/**
32			* Constructor for the XMLStreamParser.
33			*/
34			public XMLStreamParser (XMLPacket packet) {
35			_packet = packet;
36			}
37
38			//---PUBLIC METHODS---
39
40
41			public void startDocument () throws SAXException {
42			//System.out.println("Packet found");
43			}
44
45			public void endDocument () throws SAXException {
46			//System.out.println("Packet Ended");
47			}
48
49			/**
50			* Add each tag's attribute to the XMLPacket.
51			* Note that all attributes within an opening tag are
52			* stored as "someroot.sometag.attributes.attribute_name"
53			* E.g. If <packet> is the root node, then:
54			* <packet machine_name="raptor">
55			* is stored as:
56			* "packet.attributes.machine_name"
57			* within the XMLPacket.
58			*/
59			public void startElement (String name, AttributeList attrs) throws SAXException {
60			_indentLevel++;
61			_tagList.add(name);
62			if (attrs != null) {
63			for (int i = 0; i < attrs.getLength (); i++) {
64			_packet.addParam(getPath()+".attributes."+attrs.getName(i), attrs.getValue(i));
65			}
66			}
67			}
68
69			/**
70			* When an XML element is finished with, we must remove
71			* the tag name from the tagList and decrement the indent
72			* level.
73			*/
74			public void endElement (String name) throws SAXException {
75			_tagList.remove(_tagList.size()-1);
76			_indentLevel--;
77			}
78
79			/**
80			* Any text falling within a pair of terminal tags must
81			* be added to the XMLPacket. Trim leading and trailing
82			* spaces and do not bother to add if there is no data
83			* specified within the tags.
84			*/
85			public void characters (char[] buf, int offset, int len) throws SAXException {
86			String s = new String(buf, offset, len);
87			if (!s.trim().equals("")) {
88			_packet.addParam(getPath(), s);
89			}
90			}
91
92			//---PRIVATE METHODS---
93
94			/**
95			* Return the heirarchical string to be used as a key value
96			* in the XMLPacket.
97			*/
98			private String getPath () {
99			String path = (String)_tagList.get(0);
100			if (_tagList.size() > 0) {
101			for (int i = 1 ; i < _tagList.size() ; i++) {
102			path = path + "." + (String)_tagList.get(i);
103			}
104			}
105			return path;
106			}
107
108			//---ACCESSOR/MUTATOR METHODS---
109
110			//---ATTRIBUTES---
111
112			private int _indentLevel = 0;
113			private ArrayList _tagList = new ArrayList();
114			private XMLPacket _packet;
115
116			//---STATIC ATTRIBUTES---
117
118			}