Bug 200751 NPE in Excel emitter
writer.text( ( (Data) d ).txt.toString( ) ); SEVERE: An error happened while running the report. Cause: java.lang.NullPointerException at org.eclipse.birt.report.engine.emitter.excel.ExcelWriter.writeText(Ex celWriter.java:102) at org.eclipse.birt.report.engine.emitter.excel.ExcelWriter.writeTxtData (ExcelWriter.java:152) at org.eclipse.birt.report.engine.emitter.excel.ExcelEmitter.outputData( ExcelEmitter.java:311) at org.eclipse.birt.report.engine.emitter.excel.ExcelEmitter.end(ExcelEm itter.java:286) at org.eclipse.birt.report.engine.api.impl.RenderTask$PageRangeRender.re nder(RenderTask.java:593) at org.eclipse.birt.report.engine.api.impl.RenderTask.render(RenderTask. java:260)
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelWriter.java
}
	}
	protected static Logger logger = Logger.getLogger( ExcelWriter.class
			.getName( ) );
	public ExcelWriter( OutputStream out )
	{
		this( out, "UTF-8" );
	}
	public ExcelWriter( OutputStream out, String encoding )
	{
		writer.open( out, encoding );
	}
	
	
	
	public void writeText( Object d )
	{
		writer.openTag( "Data" );
		if ( d instanceof Data )
		{
			if ( ( (Data) d ).getDatatype( ).equals( Data.NUMBER ) )
			{
				writer.attribute( "ss:Type", "Number" );
			}
			else if ( ( (Data) d ).getDatatype( ).equals( Data.DATE ) )
			{
				writer.attribute( "ss:Type", "DateTime" );
			}
			else
			{