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
*/
			public Object wrap( Context cx, Scriptable scope, Object obj,
					Class staticType )
			{
				Object object = coreWrapper.wrap( cx, scope, obj, staticType );
				if ( object != obj )
				{
					return object;
				}
				return super.wrap( cx, scope, obj, staticType );
			}
		} );
		new CoreJavaScriptInitializer( ).initialize( cx, scope );
	}
	/**
	 * get the report engine. In that engine, we create the context.
	 * 
	 * @return the report engine used to create the context.
	 */
	public IReportEngine getEngine( )
	{
		return engine;
	}
	/**
	 * returns taskID as string. The value can be used for logging.
	 * 
	 * @return taskID as string
	 */
	public String getTaskIDString( )
	{