Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
.get( element );
		if ( exInfo == null )
		{
			exInfo = new ElementExceptionInfo( element );
			if ( reportContent != null )
				reportContent.getErrors( ).add( exInfo );
			else
				onPrepareErrors.add( exInfo );
			elementExceptions.put( element, exInfo );
		}
		exInfo.addException( ex );
		
		if ( cancelOnError && task != null )
		{
			task.cancel( );
		}
	}
	/**
	 * report object is the script object used in the script context.
	 * 
	 * All infos can get from this object.
	 * 
	 * 
	 */
	private class ReportObject
	{
		/**
		 * get the report design handle
		 * 
		 * @return report design object.