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
{
						urls.add( url );
					}
				}
				if ( urls.size( ) != 0 )
				{
					URL[] jarUrls = (URL[]) urls.toArray( new URL[]{} );
					return new URLClassLoader( jarUrls, parent );
				}
			}
			return parent;
		}
	}
	/**
	 * Set the cancel flag.
	 */
	public void cancel( )
	{
		isCancelled = true;
	}
	public boolean isCanceled( )
	{
		return isCancelled;
	}
	
	public void setDataSource( IDocArchiveReader dataSource )
	{
		try
		{
			dataSource.open( );