package com.ericgiguere.techtips;
import java.io.*;
import java.util.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import nanoxml.*;
import org.kxml.*;
import org.kxml.parser.*;
/**
* Simple MIDlet that demonstrates how an XML document can be
* parsed using kXML or NanoXML.
*/
public class XMLTest extends MIDlet {
// Our XML document -- normally this would be something you
// download.
private static String xmlDocument =
"- apple
" +
"- orange
" +
"- pear
";
private Display display;
private Command exitCommand = new Command( "Exit",
Command.EXIT, 1 );
public XMLTest(){
}
protected void destroyApp( boolean unconditional )
throws MIDletStateChangeException {
exitMIDlet();
}
protected void pauseApp(){
}
protected void startApp() throws MIDletStateChangeException {
if( display == null ){ // first time called...
initMIDlet();
}
}
private void initMIDlet(){
display = Display.getDisplay( this );
String [] items;
//items = parseUsingNanoXML( xmlDocument );
items = parseUsingkXML( xmlDocument );
display.setCurrent( new ItemList( items ) );
}
public void exitMIDlet(){
notifyDestroyed();
}
// Parses a document using NanoXML, looking for
// "item" nodes and returning their content as an
// array of strings.
private String[] parseUsingNanoXML( String xml ){
kXMLElement root = new kXMLElement();
try {
root.parseString( xml );
Vector list = root.getChildren();
Vector items = new Vector();
for( int i = 0; i < list.size(); ++i ){
kXMLElement node =
(kXMLElement) list.elementAt( i );
String tag = node.getTagName();
if( tag == null ) continue;
if( !tag.equals( "item" ) ) continue;
items.addElement( node.getContents() );
}
String[] tmp = new String[ items.size() ];
items.copyInto( tmp );
return tmp;
}
catch( kXMLParseException ke ){
return new String[]{ ke.toString() };
}
}
// Parses a document using kXML, looking for "item"
// nodes and returning their content as an
// array of strings.
private String[] parseUsingkXML( String xml ){
try {
ByteArrayInputStream bin =
new ByteArrayInputStream(
xml.getBytes() );
InputStreamReader in = new InputStreamReader( bin );
XmlParser parser = new XmlParser( in );
Vector items = new Vector();
parsekXMLItems( parser, items );
String[] tmp = new String[ items.size() ];
items.copyInto( tmp );
return tmp;
}
catch( IOException e ){
return new String[]{ e.toString() };
}
}
private void parsekXMLItems( XmlParser parser, Vector items )
throws IOException {
boolean inItem = false;
while( true ){
ParseEvent event = parser.read();
switch( event.getType() ){
case Xml.START_TAG:
if( event.getName().equals( "item" ) ){
inItem = true;
}
break;
case Xml.END_TAG:
if( event.getName().equals( "item" ) ){
inItem = false;
}
break;
case Xml.TEXT:
if( inItem ){
items.addElement( event.getText() );
}
break;
case Xml.END_DOCUMENT:
return;
}
}
}
// Simple List UI component for displaying the list of
// items parsed from the XML document.
class ItemList extends List implements CommandListener {
ItemList( String[] list ){
super( "Items", IMPLICIT, list, null );
addCommand( exitCommand );
setCommandListener( this );
}
public void commandAction( Command c, Displayable d ){
if( c == exitCommand ){
exitMIDlet();
}
}
}
}
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