org.datanucleus.query.expression
Class Expression.MonadicOperator

java.lang.Object
  org.datanucleus.query.expression.Expression.Operator
      org.datanucleus.query.expression.Expression.MonadicOperator

Enclosing class:

Expression

public static class Expression.MonadicOperator
extends Expression.Operator

"Monadic" operator performs a function on one operand. It can be in either postfix or prefix notation.

• Prefix notation meaning the operator appears before its operand. operator operand
• Postfix notation meaning the operator appears after its operand. operand operator

Field Summary

Fields inherited from class org.datanucleus.query.expression.Expression.Operator

precedence, symbol

Constructor Summary

Expression.MonadicOperator(java.lang.String symbol, int precedence)
Monodiac operator

Method Summary

boolean

isHigherThan(Expression.Operator op) Check if this operator has higher precedence than op

Methods inherited from class org.datanucleus.query.expression.Expression.Operator

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Expression.MonadicOperator

public Expression.MonadicOperator(java.lang.String symbol,
                                  int precedence)

Monodiac operator

Parameters:

symbol - the source text or symbol of an operator. e.g =, ==, +, /, >, <, etc

precedence - the order of precedence where the expression is compiled

Method Detail

isHigherThan

public boolean isHigherThan(Expression.Operator op)

Check if this operator has higher precedence than op

Parameters:

op - the operator

Returns:

true if this operation is higher