private void expressionRest(Map<String, Boolean> fields, Stack<Boolean> stack, ConditionLexer lex) throws IOException, AnnotationParseException { ConditionToken tok = lex.lex(); if (tok == null) { return; } switch (tok.type) { case AND: Boolean andOp1 = stack.pop(); expression(fields, stack, lex); Boolean andOp2 = stack.pop(); stack.push(andOp1 && andOp2); break; case OR: Boolean orOp1 = stack.pop(); expression(fields, stack, lex); Boolean orOp2 = stack.pop(); stack.push(orOp1 || orOp2); break; default: lex.pushback(tok); } }