Bug 165278 this.getDisplayContent()="" in script of text will destroy preview[0801]
Description: this.getDisplayContent()="" in script of text will destroy preview Build number:2.1.2.v20061120 and 2.2.0.v20061117 Steps to reproduce: 1. Insert a text item, select it and switch to script editor 2. Input this.getDisplayContent()="" and preview Expected result: Error message about the incorrect script. Actual result: In 2.1.2, I saw HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. In 2.2.0, I saw error dialog with java.lang.ClassCastException.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
scriptContext.registerBean( "reportContext", reportContext );
	}
	public void setPageNumber( long pageNo )
	{
		pageNumber = pageNo;
		scriptContext.registerBean( "pageNumber", new Long( pageNumber ) );
		if ( totalPage < pageNumber )
		{
			setTotalPage( pageNumber );
		}
	}
	/**
	 * set the total page.
	 * 
	 * @param totalPage
	 *            total page
	 */
	public void setTotalPage( long totalPage )
	{
		if ( totalPage > pageNumber )
		{
			totalPage = pageNumber;
			scriptContext.registerBean( "totalPage", new Long( totalPage ) );
			if ( reportContent instanceof ReportContent )
			{
				( (ReportContent) reportContent ).setTotalPage( totalPage );
			}
		}
	}
	/**