Package com.udojava.evalex

Class AbstractUnaryOperator

java.lang.Object

com.udojava.evalex.AbstractLazyOperator

com.udojava.evalex.AbstractOperator

com.udojava.evalex.AbstractUnaryOperator

All Implemented Interfaces:

LazyOperator, Operator

Direct Known Subclasses:

Expression.UnaryOperator

public abstract class AbstractUnaryOperator
extends AbstractOperator

Abstract implementation of an unary operator.

This abstract implementation implements eval so that it forwards its first parameter to evalUnary.

Field Summary

Fields inherited from class com.udojava.evalex.AbstractLazyOperator

booleanOperator, leftAssoc, oper, precedence, unaryOperator

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractUnaryOperator(java.lang.String oper, int precedence, boolean leftAssoc)	Creates a new 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.
java.math.BigDecimal	eval(java.math.BigDecimal v1, java.math.BigDecimal v2)	Implementation of this operator calling unary operator evaluation method..
abstract java.math.BigDecimal	evalUnary(java.math.BigDecimal v1)	Implementation of this prefix unary operator.

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

Constructor Detail

AbstractUnaryOperator

protected AbstractUnaryOperator(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)

Description copied from class: AbstractOperator

Implementation of this operator supporting either 1 or 2 operands.

Specified by:

eval in interface LazyOperator

Overrides:

eval in class AbstractOperator

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.

eval

public java.math.BigDecimal eval(java.math.BigDecimal v1,
                                 java.math.BigDecimal v2)

Implementation of this operator calling unary operator evaluation method..

Parameters:

v1 - The first parameter.

v2 - The second parameter. Expected to be null

Returns:

The result of the operation.

evalUnary

public abstract java.math.BigDecimal evalUnary(java.math.BigDecimal v1)

Implementation of this prefix unary operator.

Parameters:

v1 - The parameter.

Returns:

The result of the operation.