Bug 190424 [Regression] Exception is thrown out when preview a data with null expression [0001]
Description: Exception is thrown out when preview a data with null expression. Regression of #158252 Build number: 2.2.0.v20070601-1347 Steps to reproduce: 1. New a data with null expression. Expected result: No exception is thrown out. Actual result: Exception is thrown out. Error log: - The expression cannot be null or empty. data.engine.EmptyExpression ( 1 time(s) ) detail : org.eclipse.birt.data.engine.core.DataException: The expression cannot be null or empty. at org.eclipse.birt.data.engine.expression.ExprEvaluateUtil.doEvaluateRawExpression(ExprEvaluateUtil.java:239) at org.eclipse.birt.data.engine.expression.ExprEvaluateUtil.evaluateRawExpression(ExprEvaluateUtil.java:206) at org.eclipse.birt.data.engine.impl.PreparedDummyQuery$ResultIterator.getValue(PreparedDummyQuery.java:557) at org.eclipse.birt.report.engine.data.dte.QueryResultSet.getValue(QueryResultSet.java:309) at org.eclipse.birt.report.engine.executor.DataItemExecutor.execute(DataItemExecutor.java:95) at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.java:45) at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:42) at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.java:45) at org.eclipse.birt.report.engine.internal.executor.l18n.LocalizedReportItemExecutor.execute(LocalizedReportItemExecutor.java:33) at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layoutChildren(HTMLPageLM.java:126) at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:84) at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:90) at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:148) at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:71) at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(Unknown Source) at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(Unknown Source) at org.eclipse.birt.report.service.BirtViewerReportService.runAndRenderReport(Unknown Source) at org.eclipse.birt.report.service.actionhandler.BirtGetPageAllActionHandler.__execute(Unknown Source) at org.eclipse.birt.report.service.actionhandler.AbstractBaseActionHandler.execute(Unknown Source) at org.eclipse.birt.report.soapengine.processor.AbstractBaseDocumentProcessor.__executeAction(Unknown Source) at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.executeAction(Unknown Source) at org.eclipse.birt.report.soapengine.processor.BirtDocumentProcessor.handleGetPageAll(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.process(Unknown Source) at org.eclipse.birt.report.soapengine.endpoint.BirtSoapBindingImpl.getUpdatedObjects(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397) at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186) at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:453) at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281) at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699) at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doPost(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643) at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641) at org.eclipse.tomcat.internal.EclipseErrorReportValve.invoke(EclipseErrorReportValve.java:153) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) at java.lang.Thread.run(Thread.java:595)
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/dialogs/CrosstabBindingDialogHelper.java
else
		{
			( (GridData) argsComposite.getLayoutData( ) ).heightHint = 0;
			
			
		}
		argsComposite.layout( );
		composite.layout( );
		dialog.getShell( ).layout( );
	}
	private void createExpressionButton( final Composite parent, final Text text )
	{
		Button expressionButton = new Button( parent, SWT.PUSH );
		if ( expressionProvider == null )
			expressionProvider = new BindingExpressionProvider( this.bindingHolder );
		UIUtil.setExpressionButtonImage( expressionButton );
		expressionButton.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				ExpressionBuilder expression = new ExpressionBuilder( text.getText( ) );
				expression.setExpressionProvier( expressionProvider );
				if ( expression.open( ) == Window.OK )
				{
					if ( expression.getResult( ) != null )
						text.setText( expression.getResult( ) );
				}
			}
		} );
	}
	private String getColumnBindingExpressionByName( String name )