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
ArrayList urls = new ArrayList( );
			for ( int i = 0; i < classPathes.length; i++ )
			{
				String classPath = System.getProperty( classPathes[i] );
				if ( classPath != null && classPath.length( ) != 0 )
				{
					String[] jars = classPath.split( PROPERTYSEPARATOR, -1 );
					if ( jars != null && jars.length != 0 )
					{
						for ( int j = 0; j < jars.length; j++ )
						{
							File file = new File( jars[j] );
							try
							{
								urls.add( file.toURL( ) );
							}
							catch ( MalformedURLException e )
							{
								e.printStackTrace( );
							}
						}
					}
				}
			}
			if ( urls.size( ) != 0 )
			{
				return new URLClassLoader( (URL[]) urls.toArray( new URL[0] ),
						parent );
			}
			return parent;