com.alibaba.qlexpress4.operator

Interface OperatorCheckStrategy

All Known Implementing Classes:

BlackOperatorCheckStrategy, DefaultOperatorCheckStrategy, WhiteOperatorCheckStrategy

public interface OperatorCheckStrategy

Operator restriction strategy interface. Defines the contract for checking whether an operator is allowed. Supported operators (organized by category): - arithmetic: +, -, *, /, %, mod, +=, -=, *=, /=, %= - assign: = - bit: &, |, ^, ~, <<, >>, >>>, &=, |=, ^=, <<=, >>=, >>>= - collection: in, not_in - compare: ==, !=, <>, <, <=, >, >= - logic: &&, ||, !, and, or - string: like, not_like - unary: ++, --, +, - (unary) - root: instanceof Usage example:

   // Whitelist strategy - only allow + and *
   Set<String> allowed = new HashSet<>(Arrays.asList("+", "*"));
   OperatorCheckStrategy strategy = OperatorCheckStrategy.whitelist(allowed);

   // Blacklist strategy - forbid assignment operator
   Set<String> forbidden = new HashSet<>(Arrays.asList("="));
   OperatorCheckStrategy strategy = OperatorCheckStrategy.blacklist(forbidden);

   // Allow all operators
   OperatorCheckStrategy strategy = OperatorCheckStrategy.allowAll();
 

Method Summary

Modifier and Type	Method and Description
static OperatorCheckStrategy	allowAll()
static OperatorCheckStrategy	blacklist(java.util.Set<java.lang.String> forbiddenOperators)
java.util.Set<java.lang.String>	getOperators()
boolean	isAllowed(java.lang.String operator)
static OperatorCheckStrategy	whitelist(java.util.Set<java.lang.String> allowedOperators)

Method Detail

allowAll

static OperatorCheckStrategy allowAll()

whitelist

static OperatorCheckStrategy whitelist(java.util.Set<java.lang.String> allowedOperators)

blacklist

static OperatorCheckStrategy blacklist(java.util.Set<java.lang.String> forbiddenOperators)

isAllowed

boolean isAllowed(java.lang.String operator)

getOperators

java.util.Set<java.lang.String> getOperators()