{
throws DataException { if ( expression == null ) throw new DataException( ResourceConstants.EXPRESSION_CANNOT_BE_NULL_OR_BLANK );
	protected ScriptOrFnNode parse( String expression, Context cx )	{ 		CompilerEnvirons compilerEnv = getCompilerEnv( cx );		Parser p = new Parser( compilerEnv, cx.getErrorReporter( ) );		return p.parse( expression, null, 0 );	}