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AndOperator (jbpm-3.1.3) - JBoss JBPM 3.1.3 API 英文版文档

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org.jbpm.jpdl.el.impl
Class AndOperator

java.lang.Object
  org.jbpm.jpdl.el.impl.BinaryOperator
      org.jbpm.jpdl.el.impl.AndOperator

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public class AndOperator
extends BinaryOperator

The implementation of the and operator

Version:

$Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: tombaeyens $

Author:

Nathan Abramson - Art Technology Group

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Field Summary
static AndOperator	SINGLETON

 

Constructor Summary
AndOperator()           Constructor

 

Method Summary
java.lang.Object	apply(java.lang.Object pLeft, java.lang.Object pRight, Logger pLogger)           Applies the operator to the given value
java.lang.String	getOperatorSymbol()           Returns the symbol representing the operator
boolean	shouldCoerceToBoolean()           Returns true if the operator expects its arguments to be coerced to Booleans.
boolean	shouldEvaluate(java.lang.Object pLeft)           Returns true if evaluation is necessary given the specified Left value.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

SINGLETON

public static final AndOperator SINGLETON

Constructor Detail

AndOperator

public AndOperator()

Constructor

Method Detail

getOperatorSymbol

public java.lang.String getOperatorSymbol()

Returns the symbol representing the operator

Specified by:

getOperatorSymbol in class BinaryOperator

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apply

public java.lang.Object apply(java.lang.Object pLeft,
                              java.lang.Object pRight,
                              Logger pLogger)
                       throws ELException

Applies the operator to the given value

Specified by:

apply in class BinaryOperator

Throws:

ELException

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shouldEvaluate

public boolean shouldEvaluate(java.lang.Object pLeft)

Returns true if evaluation is necessary given the specified Left value. The And/OrOperators make use of this

Overrides:

shouldEvaluate in class BinaryOperator

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shouldCoerceToBoolean

public boolean shouldCoerceToBoolean()

Returns true if the operator expects its arguments to be coerced to Booleans. The And/Or operators set this to true.

Overrides:

shouldCoerceToBoolean in class BinaryOperator

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Version : jbpm-3.1.3