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
&& e.getLocalizedMessage( ) != null
						&& e.getLocalizedMessage( ).equals(
								err.getLocalizedMessage( ) ) )
				{
					countList.set( i, new Integer( ( (Integer) countList
							.get( i ) ).intValue( ) + 1 ) );
					return;
				}
			}
			exList.add( e );
			countList.add( new Integer( 1 ) );
		}
		public String getType( )
		{
			if ( element == null )
			{
				return "report";
			}
			return element.getDefn( ).getName( );
		}
		public String getName( )
		{
			if ( element == null )
			{
				return "report";
			}
			return element.getName( );
		}
		
		public String getID( )