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
resultOp[i - 1] = obArray[i];
			}
		}
		
		if ( logger.isLoggable( Level.FINER ) )
		{
			String logStr ="";
			for ( int i = 0; i < ops.length; i++ )
			{
				logStr += resultOp[i] == null
						? null
						: ( ", resultOp" + i + "=" + LogUtil.toString( resultOp[i] ) );
			}
			logger.entering( ScriptEvalUtil.class.getName( ),
					"evalConditionalExpr",
					"evalConditionalExpr() resultObject=" +
							LogUtil.toString( resultObject ) + ", operator=" +
							operator + logStr );
		}
		boolean result = false;
		switch ( operator )
		{
			case IConditionalExpression.OP_EQ :
			    result = compare( resultObject, resultOp[0] ) == 0;
				break;
			case IConditionalExpression.OP_NE :
			    result = compare( resultObject, resultOp[0] ) != 0;
				break;
			case IConditionalExpression.OP_LT :
				result = compare( resultObject, resultOp[0] ) < 0;