Bug 194163 Inconsistent behaviors occur when clicking F1 in Data Binding help page [17]
Description: In Data Binding Press "F1" button Build number: 2.2.0.v20070625-0630 Steps: 1.Open chart builder, go to "Select Data" tab 2.Click "Data Binding..." button 3.Press "F1" button 4.Help dialog will be pop up 5.Click nothingness in the "About" menu 5.Press "F1" button again Expected result: page no change. Actual result: the page change to another one. Error log: N/A
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
ClassLoader oldContextLoader = Thread.currentThread( )
				.getContextClassLoader( );
		ClassLoader parentLoader = oldContextLoader;
		if ( parentLoader == null )
			parentLoader = this.getClass( ).getClassLoader( );
		ClassLoader newContextLoader = getCustomScriptClassLoader( parentLoader );
		Thread.currentThread( ).setContextClassLoader( newContextLoader );
		try
		{
			QueryDefinition queryDefn = new QueryDefinition( );
		    int maxRow = getMaxRow( );
			queryDefn.setMaxRows( maxRow );
			queryDefn.setDataSetName( getDataSetFromHandle( ).getQualifiedName( ) );
			
			DataSessionContext dsc = new DataSessionContext( DataSessionContext.MODE_DIRECT_PRESENTATION,
					getReportDesignHandle( ) );
			dsc.setCacheOption( DataSessionContext.CACHE_USE_ALWAYS, maxRow );
			
			DataRequestSession session = DataRequestSession.newSession( dsc );
			for ( int i = 0; i < columnExpression.length; i++ )
			{
				queryDefn.addResultSetExpression( columnExpression[i],
						new ScriptExpression( columnExpression[i] ) );
			}
			IQueryResults actualResultSet = session.executeQuery( queryDefn,
					itemHandle.getPropertyHandle( ReportItemHandle.PARAM_BINDINGS_PROP )
							.iterator( ),
					itemHandle.getPropertyHandle( ExtendedItemHandle.FILTER_PROP )