| 12 |
|
// XMLPacketMaker - Creates an XMLPacket object. |
| 13 |
|
public class XMLPacketMaker extends HandlerBase { |
| 14 |
|
|
| 15 |
+ |
// No-args constructor. Generally not used. |
| 16 |
|
public XMLPacketMaker () { |
| 17 |
< |
// default no-args constructor. |
| 17 |
> |
this.xml = "<packet></packet>"; |
| 18 |
|
} |
| 19 |
|
|
| 20 |
< |
// Constructor for accepting a reference to an XMLPacket |
| 21 |
< |
public XMLPacketMaker (XMLPacket packet) { |
| 22 |
< |
this.packet = packet; |
| 20 |
> |
// Constructor for accepting XML input. |
| 21 |
> |
public XMLPacketMaker (String xml) { |
| 22 |
> |
this.xml = xml; |
| 23 |
|
} |
| 24 |
|
|
| 25 |
< |
public static void main(String[] args){ |
| 25 |
< |
if (args.length != 1) { |
| 26 |
< |
System.err.println ("Usage: cmd filename"); |
| 27 |
< |
System.exit (1); |
| 28 |
< |
} |
| 25 |
> |
public XMLPacket createXMLPacket() { |
| 26 |
|
|
| 27 |
+ |
// Create the XMLPacket to store values in. |
| 28 |
+ |
XMLPacket packet = new XMLPacket(); |
| 29 |
+ |
|
| 30 |
|
// Use the default (non-validating) parser |
| 31 |
|
SAXParserFactory factory = SAXParserFactory.newInstance(); |
| 32 |
|
try { |
| 33 |
– |
// Set up output stream |
| 34 |
– |
out = new OutputStreamWriter (System.out, "UTF8"); |
| 33 |
|
|
| 36 |
– |
// Create the XMLPacket to store values in. |
| 37 |
– |
packet = new XMLPacket(); |
| 38 |
– |
|
| 34 |
|
// Parse the input |
| 35 |
|
SAXParser saxParser = factory.newSAXParser(); |
| 36 |
< |
saxParser.parse(new File(args[0]), new XMLPacketMaker(packet)); |
| 36 |
> |
saxParser.parse(xml, new XMLPacketParser(packet)); |
| 37 |
|
|
| 38 |
|
// Print out the entire contents of the packet's HashMap. |
| 39 |
|
System.out.println("XMLPacket contents: -"); |
| 40 |
|
packet.printAll(); |
| 41 |
|
|
| 47 |
– |
} catch (Throwable t) { |
| 48 |
– |
System.out.println("The recieved packet did not contain valid XML, so I'm gonna reject it."); |
| 49 |
– |
//t.printStackTrace (); |
| 42 |
|
} |
| 43 |
< |
System.exit (0); |
| 44 |
< |
} |
| 45 |
< |
|
| 46 |
< |
static private Writer out; |
| 55 |
< |
private String indentString = " "; // Amount to indent |
| 56 |
< |
private int indentLevel = 0; |
| 57 |
< |
|
| 58 |
< |
// For storing the tag heirarchy. |
| 59 |
< |
private ArrayList tagList = new ArrayList(); |
| 60 |
< |
static private XMLPacket packet = null; |
| 61 |
< |
|
| 62 |
< |
//=========================================================== |
| 63 |
< |
// SAX DocumentHandler methods |
| 64 |
< |
//=========================================================== |
| 65 |
< |
|
| 66 |
< |
public void startDocument () throws SAXException { |
| 67 |
< |
// No purpose currently. |
| 68 |
< |
} |
| 69 |
< |
|
| 70 |
< |
public void endDocument () throws SAXException { |
| 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); |
| 85 |
< |
if (attrs != null) { |
| 86 |
< |
for (int i = 0; i < attrs.getLength (); i++) { |
| 87 |
< |
packet.addParam(getPath()+".attributes."+attrs.getName(i), attrs.getValue(i)); |
| 88 |
< |
} |
| 43 |
> |
catch (Exception e) { |
| 44 |
> |
System.out.println("XMLPacketMaker - I just received an XML packet that did not contain valid XML."); |
| 45 |
> |
System.out.println(e); |
| 46 |
> |
return null; |
| 47 |
|
} |
| 48 |
+ |
|
| 49 |
+ |
return packet; |
| 50 |
|
} |
| 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 { |
| 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 { |
| 105 |
– |
String s = new String(buf, offset, len); |
| 106 |
– |
if (!s.trim().equals("")) { |
| 107 |
– |
packet.addParam(getPath(), s); |
| 108 |
– |
} |
| 109 |
– |
} |
| 110 |
– |
|
| 111 |
– |
|
| 112 |
– |
//=========================================================== |
| 113 |
– |
// Helpers ... |
| 114 |
– |
//=========================================================== |
| 51 |
|
|
| 52 |
< |
|
| 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 |
< |
|
| 52 |
> |
String xml; |
| 53 |
|
} |
