org.datanucleus.query.expression

Class Expression.MonadicOperator

java.lang.Object

org.datanucleus.query.expression.Expression.Operator

org.datanucleus.query.expression.Expression.MonadicOperator

All Implemented Interfaces:

Serializable

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

See Also:

Serialized Form

Field Summary

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

precedence, symbol

Constructor Summary

Constructors

Constructor and Description
MonadicOperator(String symbol, int precedence) Monodiac operator

Method Summary

Modifier and Type	Method and Description
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

MonadicOperator

public MonadicOperator(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