| 3 |
|
|
| 4 |
|
import org.xml.sax.*; |
| 5 |
|
|
| 6 |
< |
import javax.xml.parsers.SAXParserFactory; |
| 7 |
< |
import javax.xml.parsers.ParserConfigurationException; |
| 8 |
< |
import javax.xml.parsers.SAXParser; |
| 6 |
> |
import javax.xml.parsers.SAXParserFactory; |
| 7 |
> |
import javax.xml.parsers.ParserConfigurationException; |
| 8 |
> |
import javax.xml.parsers.SAXParser; |
| 9 |
|
|
| 10 |
+ |
// Paul Mutton, pjm2@ukc.ac.uk |
| 11 |
|
|
| 12 |
+ |
// XMLPacketMaker - Creates an XMLPacket object. |
| 13 |
|
public class XMLPacketMaker extends HandlerBase { |
| 14 |
|
|
| 15 |
|
public XMLPacketMaker () { |
| 40 |
|
SAXParser saxParser = factory.newSAXParser(); |
| 41 |
|
saxParser.parse(new File(args[0]), new XMLPacketMaker(packet)); |
| 42 |
|
|
| 43 |
< |
// Print out some things from the packet: - |
| 44 |
< |
|
| 43 |
> |
// Print out the entire contents of the packet's HashMap. |
| 44 |
> |
System.out.println("XMLPacket contents: -"); |
| 45 |
> |
packet.printAll(); |
| 46 |
|
|
| 47 |
|
} catch (Throwable t) { |
| 48 |
< |
t.printStackTrace (); |
| 48 |
> |
System.out.println("The recieved packet did not contain valid XML, so I'm gonna reject it."); |
| 49 |
> |
//t.printStackTrace (); |
| 50 |
|
} |
| 51 |
|
System.exit (0); |
| 52 |
|
} |
| 64 |
|
//=========================================================== |
| 65 |
|
|
| 66 |
|
public void startDocument () throws SAXException { |
| 67 |
< |
nl(); |
| 64 |
< |
nl(); |
| 65 |
< |
emit ("START DOCUMENT"); |
| 66 |
< |
nl(); |
| 67 |
< |
emit ("<?xml version='1.0' encoding='UTF-8'?>"); |
| 67 |
> |
// No purpose currently. |
| 68 |
|
} |
| 69 |
|
|
| 70 |
|
public void endDocument () throws SAXException { |
| 71 |
< |
nl(); emit ("END DOCUMENT"); |
| 72 |
< |
try { |
| 73 |
< |
nl(); |
| 74 |
< |
out.flush (); |
| 75 |
< |
} catch (IOException e) { |
| 76 |
< |
throw new SAXException ("I/O error", e); |
| 77 |
< |
} |
| 71 |
> |
// No purpose currently. |
| 72 |
|
} |
| 73 |
|
|
| 74 |
+ |
// Add each tag's attribute to the XMLPacket. |
| 75 |
+ |
// Note that all attributes within an opening tag are |
| 76 |
+ |
// stored as "someroot.sometag.attributes.attribute_name" |
| 77 |
+ |
// E.g. If <packet> is the root node, then: |
| 78 |
+ |
// <packet machine_name="raptor"> |
| 79 |
+ |
// is stored as: |
| 80 |
+ |
// "packet.attributes.machine_name" |
| 81 |
+ |
// within the XMLPacket. |
| 82 |
|
public void startElement (String name, AttributeList attrs) throws SAXException { |
| 83 |
|
indentLevel++; |
| 84 |
|
tagList.add(name); |
| 83 |
– |
nl(); emit ("ELEMENT: "); |
| 84 |
– |
emit ("<"+name); |
| 85 |
|
if (attrs != null) { |
| 86 |
|
for (int i = 0; i < attrs.getLength (); i++) { |
| 87 |
< |
nl(); |
| 88 |
< |
emit(" ATTR: "); |
| 89 |
< |
emit (attrs.getName (i)); |
| 90 |
< |
emit ("\t\""); |
| 91 |
< |
emit (attrs.getValue (i)); |
| 92 |
< |
emit ("\""); |
| 87 |
> |
packet.addParam(getPath()+".attributes."+attrs.getName(i), attrs.getValue(i)); |
| 88 |
|
} |
| 89 |
|
} |
| 95 |
– |
if (attrs.getLength() > 0) nl(); |
| 96 |
– |
emit (">"); |
| 90 |
|
} |
| 91 |
|
|
| 92 |
+ |
// When an XML element is finished with, we must remove |
| 93 |
+ |
// the tag name from the tagList and decrement the indent |
| 94 |
+ |
// level. |
| 95 |
|
public void endElement (String name) throws SAXException { |
| 100 |
– |
nl(); |
| 101 |
– |
emit ("END_ELM: "); |
| 102 |
– |
emit ("</"+name+">"); |
| 96 |
|
tagList.remove(tagList.size()-1); |
| 97 |
|
indentLevel--; |
| 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 |
|
public void characters (char[] buf, int offset, int len) throws SAXException { |
| 108 |
– |
nl(); emit ("CHARS: "); |
| 105 |
|
String s = new String(buf, offset, len); |
| 106 |
|
if (!s.trim().equals("")) { |
| 107 |
< |
emit (s); |
| 112 |
< |
packet.addParam((String)tagList.get(tagList.size()-1), s); |
| 107 |
> |
packet.addParam(getPath(), s); |
| 108 |
|
} |
| 109 |
|
} |
| 110 |
|
|
| 111 |
+ |
|
| 112 |
|
//=========================================================== |
| 113 |
|
// Helpers ... |
| 114 |
|
//=========================================================== |
| 115 |
< |
|
| 116 |
< |
// Wrap I/O exceptions in SAX exceptions, to |
| 117 |
< |
// suit handler signature requirements |
| 118 |
< |
private void emit (String s) throws SAXException { |
| 119 |
< |
try { |
| 120 |
< |
out.write (s); |
| 121 |
< |
out.flush (); |
| 122 |
< |
} catch (IOException e) { |
| 123 |
< |
throw new SAXException ("I/O error", e); |
| 115 |
> |
|
| 116 |
> |
|
| 117 |
> |
// Return the heirarchical string to be used as a key value |
| 118 |
> |
// in the XMLPacket. |
| 119 |
> |
private String getPath () { |
| 120 |
> |
String path = (String)tagList.get(0); |
| 121 |
> |
if (tagList.size() > 0) { |
| 122 |
> |
for (int i = 1 ; i < tagList.size() ; i++) { |
| 123 |
> |
path = path + "." + (String)tagList.get(i); |
| 124 |
> |
} |
| 125 |
|
} |
| 126 |
+ |
return path; |
| 127 |
|
} |
| 128 |
< |
|
| 131 |
< |
// Start a new line |
| 132 |
< |
// and indent the next line appropriately |
| 133 |
< |
private void nl () throws SAXException { |
| 134 |
< |
String lineEnd = System.getProperty("line.separator"); |
| 135 |
< |
try { |
| 136 |
< |
out.write (lineEnd); |
| 137 |
< |
for (int i=0; i < indentLevel; i++) out.write(indentString); |
| 138 |
< |
} catch (IOException e) { |
| 139 |
< |
throw new SAXException ("I/O error", e); |
| 140 |
< |
} |
| 141 |
< |
} |
| 128 |
> |
|
| 129 |
|
} |
