Package com.ezylang.evalex.operators

Class AbstractOperator

java.lang.Object

com.ezylang.evalex.operators.AbstractOperator

All Implemented Interfaces:

OperatorIfc

Direct Known Subclasses:

InfixAndOperator, InfixDivisionOperator, InfixEqualsOperator, InfixGreaterEqualsOperator, InfixGreaterOperator, InfixLessEqualsOperator, InfixLessOperator, InfixMinusOperator, InfixModuloOperator, InfixMultiplicationOperator, InfixNotEqualsOperator, InfixOrOperator, InfixPlusOperator, InfixPowerOfOperator, PrefixMinusOperator, PrefixNotOperator, PrefixPlusOperator

public abstract class AbstractOperator
extends java.lang.Object
implements OperatorIfc

Abstract implementation of the OperatorIfc, used as base class for operator implementations.

Nested Class Summary

Nested classes/interfaces inherited from interface com.ezylang.evalex.operators.OperatorIfc

OperatorIfc.OperatorType

Field Summary

Fields inherited from interface com.ezylang.evalex.operators.OperatorIfc

OPERATOR_PRECEDENCE_ADDITIVE, OPERATOR_PRECEDENCE_AND, OPERATOR_PRECEDENCE_COMPARISON, OPERATOR_PRECEDENCE_EQUALITY, OPERATOR_PRECEDENCE_MULTIPLICATIVE, OPERATOR_PRECEDENCE_OR, OPERATOR_PRECEDENCE_POWER, OPERATOR_PRECEDENCE_POWER_HIGHER, OPERATOR_PRECEDENCE_UNARY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractOperator()	Creates a new operator and uses the InfixOperator annotation to create the operator definition.

Method Summary

Modifier and Type	Method	Description
int	getPrecedence(ExpressionConfiguration configuration)	Called during parsing, can be implemented to return a customized precedence.
boolean	isInfix()	If it is an infix operator.
boolean	isLeftAssociative()	If operators with same precedence are evaluated from left to right.
boolean	isOperandLazy()	Checks if the operand is lazy.
boolean	isPostfix()	If it is a postfix operator.
boolean	isPrefix()	If it is a prefix operator.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.ezylang.evalex.operators.OperatorIfc

evaluate, getPrecedence

Constructor Detail

AbstractOperator

protected AbstractOperator()

Creates a new operator and uses the InfixOperator annotation to create the operator definition.

Method Detail

getPrecedence

public int getPrecedence(ExpressionConfiguration configuration)

Description copied from interface: OperatorIfc

Called during parsing, can be implemented to return a customized precedence.

Specified by:

getPrecedence in interface OperatorIfc

Parameters:

configuration - The expression configuration.

Returns:

The default precedence from the operator annotation, or a customized value.

isLeftAssociative

public boolean isLeftAssociative()

Description copied from interface: OperatorIfc

If operators with same precedence are evaluated from left to right.

Specified by:

isLeftAssociative in interface OperatorIfc

Returns:

The associativity.

isOperandLazy

public boolean isOperandLazy()

Description copied from interface: OperatorIfc

Checks if the operand is lazy.

Specified by:

isOperandLazy in interface OperatorIfc

Returns:

true if operands are defined as lazy.

isPrefix

public boolean isPrefix()

Description copied from interface: OperatorIfc

If it is a prefix operator.

Specified by:

isPrefix in interface OperatorIfc

Returns:

true if it is a prefix operator.

isPostfix

public boolean isPostfix()

Description copied from interface: OperatorIfc

If it is a postfix operator.

Specified by:

isPostfix in interface OperatorIfc

Returns:

true if it is a postfix operator.

isInfix

public boolean isInfix()

Description copied from interface: OperatorIfc

If it is an infix operator.

Specified by:

isInfix in interface OperatorIfc

Returns:

true if it is an infix operator.