create a logical expression instance . concode_field_sep PlaceHolder placeHolder concode_field_sep placeholderType placeHolder
LogicalExpression function ( LogicalOperator arg0 ) { switch ( arg0 . getType ( ) ) { case AND : case OR : return new LogicalExpression ( arg0 ) ; case NOT : return new NotLogicalExpression ( arg0 ) ; default : throw new RuntimeException ( "srini_string" + arg0 ) ; } }