atg.process.filter
Class ExpressionFilter

java.lang.Object
  atg.process.filter.Filter
      atg.process.filter.ExpressionFilter

Direct Known Subclasses:

MarkerExpressionFilter, PercentageComparisonFilter

public abstract class ExpressionFilter
extends Filter

A filter which is satisfied if applying its operator to its operands (which are Expression objects) yields true.

See Also:

Expression

Field Summary

static java.lang.String

CLASS_VERSION Class version string

Fields inherited from class atg.process.filter.Filter

FALSE, TRUE

Constructor Summary

ExpressionFilter()

Method Summary

void	configure(java.lang.String pOperator, java.lang.Object pConfiguration) Configures this ExpressionFilter using the given configuration object.
boolean	equals(java.lang.Object pObject) Returns true if the given object is an ExpressionFilter with the same operator and operands.
Expression[]	getOperands() Returns the operands.
java.lang.String	getOperator() Returns the operator.
void	initialize(java.lang.String pOperator, Expression[] pOperands) Initializes this ExpressionFilter, given its operator and operands.
protected boolean	operandsEquals(ExpressionFilter pFilter) Returns true if the given ExpressionFilter has the same operands as this ExpressionFilter.
void	setOperands(Expression[] pOperands) Sets the operands.
void	setOperator(java.lang.String pOperator) Sets the operator.
java.lang.String	toString() Returns the String representation of the filter.

Methods inherited from class atg.process.filter.Filter

andFilters, andFilters, assumeFalse, assumeTrue, createProcessInstanceQuery, createSubjectQuery, evaluate, getResourceBundle, getSubjectType, hashCode, implies, isCacheable, negate, orFilters, orFilters, setCacheable, test

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

Constructor Detail

ExpressionFilter

public ExpressionFilter()

Method Detail

getOperator

public java.lang.String getOperator()

Returns the operator.

setOperator

public void setOperator(java.lang.String pOperator)

Sets the operator.

getOperands

public Expression[] getOperands()

Returns the operands.

setOperands

public void setOperands(Expression[] pOperands)

Sets the operands.

configure

public void configure(java.lang.String pOperator,
                      java.lang.Object pConfiguration)
               throws ProcessException,
                      java.lang.UnsupportedOperationException

Configures this ExpressionFilter using the given configuration object. The configuration object is typically a global Nucleus component which is configured with the information necessary for the filter's operation.

This operation is optional. This default implementation throws an UnsupportedOperationException.

Throws:

ProcessException - if the filter could not be configured - for example, because some of the required properties are missing from the configuration

java.lang.UnsupportedOperationException - if this filter is not configurable

initialize

public void initialize(java.lang.String pOperator,
                       Expression[] pOperands)
                throws ProcessException

Initializes this ExpressionFilter, given its operator and operands. The default implementation of this method simply sets the operator and operands properties. Subclasses may want to override this method to do any other initialization. For example, a subclass may want to impose restrictions on the number and/or type of operands for a given operator, etc.

Throws:

ProcessException - if the filter could not be initialized

equals

public boolean equals(java.lang.Object pObject)

Returns true if the given object is an ExpressionFilter with the same operator and operands.

Overrides:

equals in class java.lang.Object

operandsEquals

protected boolean operandsEquals(ExpressionFilter pFilter)

Returns true if the given ExpressionFilter has the same operands as this ExpressionFilter.

toString

public java.lang.String toString()

Returns the String representation of the filter.

Overrides:

toString in class java.lang.Object