Bug 146548 [regression]Data type convert in chart data binding doesn't work.
Description: Data type convert in chart data binding doesn't work. Steps to reproduce: 1. New sample data source and dataset from OFFICES. 2. Insert a chart, bind it to dataset 3. Edit data binding to change officecode from string type to integer type 4. Drag officecode to y-series Expected result: No errors. Actual result: Unable to use a text data to render a numerical/datetime axis. org.eclipse.birt.chart.exception.ChartException at: org.eclipse.birt.chart.factory.Generator.build(Generator.java:985) org.eclipse.birt.chart.ui.swt.wizard.internal.ChartPreviewPainter.updateBuffer(ChartPreviewPainter.java:152) org.eclipse.birt.chart.ui.swt.wizard.internal.ChartPreviewPainter.renderModel(ChartPreviewPainter.java:333) org.eclipse.birt.chart.ui.swt.wizard.TaskSelectData.doLivePreview(TaskSelectData.java:1043) org.eclipse.birt.chart.ui.swt.wizard.TaskSelectData.changeTask(TaskSelectData.java:984) org.eclipse.birt.chart.ui.swt.wizard.ChartAdapter.notifyChanged(ChartAdapter.java:68) org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/expression/ExprEvaluateUtil.java
private static Object doEvaluateRawExpression( IBaseExpression dataExpr,
			Scriptable scope, boolean javaType ) throws BirtException
	{
		if ( dataExpr == null )
			return null;
		
		try
		{
			Context cx = Context.enter( );
			if ( dataExpr instanceof IScriptExpression )
			{
				Object value = JavascriptEvalUtil.evaluateRawScript( cx,
						scope,
						( (IScriptExpression) dataExpr ).getText( ),
						"source",
						0 );
				
				if ( javaType == true )
					value = JavascriptEvalUtil.convertJavascriptValue( value );
				
				value = DataTypeUtil.convert( value, dataExpr.getDataType( ) );
				
				return value;
			}
			else if ( dataExpr instanceof IConditionalExpression )
			{
				if( dataExpr.getHandle( )!= null )
					return new Boolean(((NEvaluator)dataExpr.getHandle( )).evaluate( cx, scope ));
				
				IScriptExpression opr = ( (IConditionalExpression) dataExpr ).getExpression( );