Package com.udojava.evalex

Class AbstractOperator

java.lang.Object

com.udojava.evalex.AbstractLazyOperator

com.udojava.evalex.AbstractOperator

All Implemented Interfaces:

LazyOperator, Operator

Direct Known Subclasses:

AbstractUnaryOperator, Expression.Operator

public abstract class AbstractOperator
extends AbstractLazyOperator
implements Operator

Abstract implementation of an operator.

Field Summary

Fields inherited from class com.udojava.evalex.AbstractLazyOperator

booleanOperator, leftAssoc, oper, precedence, unaryOperator

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractOperator(java.lang.String oper, int precedence, boolean leftAssoc)	Creates a new operator.
protected	AbstractOperator(java.lang.String oper, int precedence, boolean leftAssoc, boolean booleanOperator)	Creates a new boolean operator.
protected	AbstractOperator(java.lang.String oper, int precedence, boolean leftAssoc, boolean booleanOperator, boolean unaryOperator)	Creates a new unary operator.

Method Summary

Modifier and Type	Method	Description
Expression.LazyNumber	eval(Expression.LazyNumber v1, Expression.LazyNumber v2)	Implementation of this operator supporting either 1 or 2 operands.

Methods inherited from class com.udojava.evalex.AbstractLazyOperator

getOper, getPrecedence, isBooleanOperator, isLeftAssoc, isUnaryOperator

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.udojava.evalex.LazyOperator

getOper, getPrecedence, isBooleanOperator, isLeftAssoc, isUnaryOperator

Methods inherited from interface com.udojava.evalex.Operator

eval

Constructor Detail

AbstractOperator

protected AbstractOperator(java.lang.String oper,
                           int precedence,
                           boolean leftAssoc,
                           boolean booleanOperator,
                           boolean unaryOperator)

Creates a new unary operator.

Parameters:

oper - The operator name (pattern).

precedence - The operators precedence.

leftAssoc - true if the operator is left associative, else false.

booleanOperator - Whether this operator is boolean.

unaryOperator - Whether the operator is unary (true) or not (false).

AbstractOperator

protected AbstractOperator(java.lang.String oper,
                           int precedence,
                           boolean leftAssoc,
                           boolean booleanOperator)

Creates a new boolean operator.

Parameters:

oper - The operator name (pattern).

precedence - The operators precedence.

leftAssoc - true if the operator is left associative, else false.

booleanOperator - Whether this operator is boolean.

AbstractOperator

protected AbstractOperator(java.lang.String oper,
                           int precedence,
                           boolean leftAssoc)

Creates a new operator.

Parameters:

oper - The operator name (pattern).

precedence - The operators precedence.

leftAssoc - true if the operator is left associative, else false.

Method Detail

eval

public Expression.LazyNumber eval(Expression.LazyNumber v1,
                                  Expression.LazyNumber v2)

Implementation of this operator supporting either 1 or 2 operands.

Specified by:

eval in interface LazyOperator

Parameters:

v1 - The first operand expected for the operation.

v2 - The second operand expected for the operation. For postfix unary operators, v2=null condition was added.

Returns:

LazyNumber object. The result of the operation.