public static Object eval(String str, Map vars) {
ExpressionCompiler compiler = new ExpressionCompiler( str.trim() );
ParserContext context = new ParserContext();
context.addPackageImport( "org.drools.task" );
context.addPackageImport( "java.util" );
context.addImport( "AccessType", AccessType.class );
context.addImport( "AllowedToDelegate", AllowedToDelegate.class );
context.addImport( "Attachment", Attachment.class );
context.addImport( "BooleanExpression", BooleanExpression.class );