Bug 201205 Exception occurs in dataset preview when IN filter contains a blank value[0802]
Description: Exception occurs in dataset preview when IN filter contains a blank value[0802] Build number: 2.2.1.v20070827-0630 Steps to reproduce: 1, New a sampleDB customer dataset 2, New a filter and operator is IN 3, Specify a blank value and add 4, Preview in dataset Expected result: The preview should be successful and no exception Actual result: Exception occurs Error log: org.eclipse.birt.report.designer.core.runtime.GUIException: Caused by java.lang.reflect.InvocationTargetException. at org.eclipse.birt.report.designer.core.runtime.GUIException.createGUIException(GUIException.java:76) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:169) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:150) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:89) at org.eclipse.birt.report.designer.data.ui.dataset.ResultSetPreviewPage.updateResultsProcess(ResultSetPreviewPage.java:515) at org.eclipse.birt.report.designer.data.ui.dataset.ResultSetPreviewPage.runUpdateResults(ResultSetPreviewPage.java:274) at org.eclipse.birt.report.designer.data.ui.dataset.ResultSetPreviewPage.access$1(ResultSetPreviewPage.java:244) at org.eclipse.birt.report.designer.data.ui.dataset.ResultSetPreviewPage$4.runInUIThread(ResultSetPreviewPage.java:237)
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/ScriptEvalUtil.java
throw new DataException(
						ResourceConstants.UNSUPPORTTED_COND_OPERATOR, new Integer(operator) );
		}
		
		logger.exiting( ScriptEvalUtil.class.getName( ),
				"evalConditionalExpr",
				new Boolean( result ) );
		return new Boolean( result );
	}
	/**
	 * @param o1
	 * @return
	 */
	private static ExprTextAndValue createExprTextAndValueInstance( Object o )
	{
		ExprTextAndValue op;
		if(! (o instanceof ExprTextAndValue ))
			op = ExprTextAndValue.newInstance( "", o );
		else
			op = (ExprTextAndValue)o;
		return op;
	}
	/**
	 * Most objects should already be formatted to the same type by method
	 * formatToComparable at this point if neither of them is null. This method
	 * will therefore be terminated pretty soon except for calling from method
	 * between with weird parameters like obj:String, op1:Double and op2:Date.
	 * 
	 * @param obj1
	 * @param obj2