package com.google.buzz.parser.handler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import com.google.buzz.model.BuzzActivity;
/**
* Handler for element: <b>Activity</b>
*
* @author roberto.estivill
*/
public class ActivityHandler
extends BaseHandler
{
/**
* XML elements handled by this handler
*/
private static final String ACTIVITY_OBJECT = "activity:object";
private static final String ACTIVITY_OBJECT_TYPE = "activity:object-type";
private static final String CONTENT = "content";
private static final String LINK = "link";
/**
* Position flags
*/
private boolean insideActivityObjectType = false;
/**
* Object to return
*/
private BuzzActivity activity;
/**
* Children handlers
*/
private ContentHandler contentHandler;
private LinkHandler linkHandler;
/**
* Constructor method to create a child handler.
*
* @param parentHandler handler
*/
public ActivityHandler( BaseHandler aParent )
{
super( aParent );
activity = new BuzzActivity();
}
/**
* @return the created activity object
*/
public BuzzActivity getBuzzActivity()
{
return activity;
}
/**
* Method to be called every time an xml element starts
*/
public void startElement( String uri, String name, String qName, Attributes attributes )
throws SAXException
{
if ( ACTIVITY_OBJECT_TYPE.equals( qName ) )
{
insideActivityObjectType = true;
}
else if ( CONTENT.equals( name ) )
{
contentHandler = new ContentHandler( this );
contentHandler.startHandlingEvents();
contentHandler.startElement( uri, name, qName, attributes );
}
else if ( LINK.equals( name ) )
{
linkHandler = new LinkHandler( this );
linkHandler.startHandlingEvents();
linkHandler.startElement( uri, name, qName, attributes );
}
}
/**
* Method to be called every time an xml element ends
*/
public void endElement( String uri, String name, String qName )
throws SAXException
{
if ( ACTIVITY_OBJECT.equals( qName ) )
{
stopHandlingEvents();
parentHandler.endElement( uri, name, qName );
}
if ( ACTIVITY_OBJECT_TYPE.equals( qName ) )
{
insideActivityObjectType = false;
}
else if ( CONTENT.equals( name ) )
{
activity.setContent( contentHandler.getBuzzContent() );
}
else if ( LINK.equals( name ) )
{
activity.setLink( linkHandler.getBuzzLink() );
}
}
/**
* Method to be called between the beginning and the end of the xml elements.
*/
public void characters( char[] ch, int start, int length )
throws SAXException
{
String content = ( new String( ch ).substring( start, start + length ) );
if ( insideActivityObjectType )
{
activity.setActivityObjectType( content );
}
}
}