| 1 |
/* |
| 2 |
* i-scream central monitoring system |
| 3 |
* http://www.i-scream.org.uk |
| 4 |
* Copyright (C) 2000-2002 i-scream |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or |
| 7 |
* modify it under the terms of the GNU General Public License |
| 8 |
* as published by the Free Software Foundation; either version 2 |
| 9 |
* of the License, or (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 |
*/ |
| 20 |
|
| 21 |
//---PACKAGE DECLARATION--- |
| 22 |
|
| 23 |
//---IMPORTS--- |
| 24 |
import java.io.*; |
| 25 |
import java.util.ArrayList; |
| 26 |
|
| 27 |
import org.xml.sax.*; |
| 28 |
import javax.xml.parsers.SAXParserFactory; |
| 29 |
import javax.xml.parsers.ParserConfigurationException; |
| 30 |
import javax.xml.parsers.SAXParser; |
| 31 |
|
| 32 |
/** |
| 33 |
* XMLStreamParser - Used to build XMLPacket objects. |
| 34 |
* |
| 35 |
* @author $Author: tdb $ |
| 36 |
* @version $Id: XMLStreamParser.java,v 1.2 2002/05/18 18:15:56 tdb Exp $ |
| 37 |
*/ |
| 38 |
public class XMLStreamParser extends HandlerBase { |
| 39 |
|
| 40 |
//---FINAL ATTRIBUTES--- |
| 41 |
|
| 42 |
/** |
| 43 |
* The current CVS revision of this class |
| 44 |
*/ |
| 45 |
public final String REVISION = "$Revision: 1.2 $"; |
| 46 |
|
| 47 |
//---STATIC METHODS--- |
| 48 |
|
| 49 |
//---CONSTRUCTORS--- |
| 50 |
|
| 51 |
/** |
| 52 |
* Constructor for the XMLStreamParser. |
| 53 |
*/ |
| 54 |
public XMLStreamParser (XMLPacket packet) { |
| 55 |
_packet = packet; |
| 56 |
} |
| 57 |
|
| 58 |
//---PUBLIC METHODS--- |
| 59 |
|
| 60 |
|
| 61 |
public void startDocument () throws SAXException { |
| 62 |
//System.out.println("Packet found"); |
| 63 |
} |
| 64 |
|
| 65 |
public void endDocument () throws SAXException { |
| 66 |
//System.out.println("Packet Ended"); |
| 67 |
} |
| 68 |
|
| 69 |
/** |
| 70 |
* Add each tag's attribute to the XMLPacket. |
| 71 |
* Note that all attributes within an opening tag are |
| 72 |
* stored as "someroot.sometag.attributes.attribute_name" |
| 73 |
* E.g. If <packet> is the root node, then: |
| 74 |
* <packet machine_name="raptor"> |
| 75 |
* is stored as: |
| 76 |
* "packet.attributes.machine_name" |
| 77 |
* within the XMLPacket. |
| 78 |
*/ |
| 79 |
public void startElement (String name, AttributeList attrs) throws SAXException { |
| 80 |
_indentLevel++; |
| 81 |
_tagList.add(name); |
| 82 |
if (attrs != null) { |
| 83 |
for (int i = 0; i < attrs.getLength (); i++) { |
| 84 |
_packet.addParam(getPath()+".attributes."+attrs.getName(i), attrs.getValue(i)); |
| 85 |
} |
| 86 |
} |
| 87 |
} |
| 88 |
|
| 89 |
/** |
| 90 |
* When an XML element is finished with, we must remove |
| 91 |
* the tag name from the tagList and decrement the indent |
| 92 |
* level. |
| 93 |
*/ |
| 94 |
public void endElement (String name) throws SAXException { |
| 95 |
_tagList.remove(_tagList.size()-1); |
| 96 |
_indentLevel--; |
| 97 |
} |
| 98 |
|
| 99 |
/** |
| 100 |
* Any text falling within a pair of terminal tags must |
| 101 |
* be added to the XMLPacket. Trim leading and trailing |
| 102 |
* spaces and do not bother to add if there is no data |
| 103 |
* specified within the tags. |
| 104 |
*/ |
| 105 |
public void characters (char[] buf, int offset, int len) throws SAXException { |
| 106 |
String s = new String(buf, offset, len); |
| 107 |
if (!s.trim().equals("")) { |
| 108 |
_packet.addParam(getPath(), s); |
| 109 |
} |
| 110 |
} |
| 111 |
|
| 112 |
//---PRIVATE METHODS--- |
| 113 |
|
| 114 |
/** |
| 115 |
* Return the heirarchical string to be used as a key value |
| 116 |
* in the XMLPacket. |
| 117 |
*/ |
| 118 |
private String getPath () { |
| 119 |
String path = (String)_tagList.get(0); |
| 120 |
if (_tagList.size() > 0) { |
| 121 |
for (int i = 1 ; i < _tagList.size() ; i++) { |
| 122 |
path = path + "." + (String)_tagList.get(i); |
| 123 |
} |
| 124 |
} |
| 125 |
return path; |
| 126 |
} |
| 127 |
|
| 128 |
//---ACCESSOR/MUTATOR METHODS--- |
| 129 |
|
| 130 |
//---ATTRIBUTES--- |
| 131 |
|
| 132 |
private int _indentLevel = 0; |
| 133 |
private ArrayList _tagList = new ArrayList(); |
| 134 |
private XMLPacket _packet; |
| 135 |
|
| 136 |
//---STATIC ATTRIBUTES--- |
| 137 |
|
| 138 |
} |
