er.directtoweb.assignments.delayed

Class ERDDelayedConditionalAssignment

java.lang.Object

com.webobjects.directtoweb.Assignment

er.directtoweb.assignments.delayed.ERDDelayedAssignment

er.directtoweb.assignments.delayed.ERDDelayedConditionalAssignment

All Implemented Interfaces:

EOKeyValueArchiving, ERDComputingAssignmentInterface, Serializable

public class ERDDelayedConditionalAssignment
extends ERDDelayedAssignment
implements ERDComputingAssignmentInterface

DelayedConditionalAssignment expects a value dictionary that contains the following keys: - qualifierFormat (see EOQualifier for more info) - args: the arguments used by the qualifier format - trueValue: the value used if the condition returns true - falseValue: the value used if the condition returns false To specify a null value for true and false values simply ommit the corresponding key. The condition is evaluated every time that the propertyKey is requested thus making the rule system a lot more dynamic.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.webobjects.eocontrol.EOKeyValueArchiving

EOKeyValueArchiving._NullValueSupport, EOKeyValueArchiving._NumberSupport, EOKeyValueArchiving._TimestampSupport, EOKeyValueArchiving.Awaking, EOKeyValueArchiving.FinishInitialization, EOKeyValueArchiving.Support

Field Summary

Fields

Modifier and Type	Field and Description
NSArray	_dependentKeys

Fields inherited from class com.webobjects.directtoweb.Assignment

KeyPathKey, ValueKey

Fields inherited from interface com.webobjects.eocontrol.EOKeyValueArchiving

_CLASS

Constructor Summary

Constructors

Constructor and Description
ERDDelayedConditionalAssignment(EOKeyValueUnarchiver u) Public constructor
ERDDelayedConditionalAssignment(String key, Object value) Public constructor

Method Summary

Modifier and Type	Method and Description
static Object	decodeWithKeyValueUnarchiver(EOKeyValueUnarchiver eokeyvalueunarchiver) Static constructor required by the EOKeyValueUnarchiver interface.
NSArray	dependentKeys(String keyPath) Implementation of the ERDComputingAssignmentInterface.
Object	fireNow(com.webobjects.directtoweb.D2WContext c) This method is called whenever the propertyKey is requested, but the value in the cache is actually a rule.

Methods inherited from class er.directtoweb.assignments.delayed.ERDDelayedAssignment

fire

Methods inherited from class com.webobjects.directtoweb.Assignment

encodeWithKeyValueArchiver, keyPath, toString, value, value

Methods inherited from class java.lang.Object

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

Field Detail

_dependentKeys

public NSArray _dependentKeys

Constructor Detail

ERDDelayedConditionalAssignment

public ERDDelayedConditionalAssignment(EOKeyValueUnarchiver u)

Public constructor

Parameters:

u - key-value unarchiver used when unarchiving from rule files.

ERDDelayedConditionalAssignment

public ERDDelayedConditionalAssignment(String key,
                                       Object value)

Public constructor

Parameters:

key - context key

value - of the assignment

Method Detail

decodeWithKeyValueUnarchiver

public static Object decodeWithKeyValueUnarchiver(EOKeyValueUnarchiver eokeyvalueunarchiver)

Static constructor required by the EOKeyValueUnarchiver interface. If this isn't implemented then the default behavior is to construct the first super class that does implement this method. Very lame.

Parameters:

eokeyvalueunarchiver - to be unarchived

Returns:

decoded assignment of this class

dependentKeys

public NSArray dependentKeys(String keyPath)

Implementation of the ERDComputingAssignmentInterface. This assignment depends upon all of the qualifier keys from the formed qualifier of the value of this assignment. This array of keys is used when constructing the significant keys for the passed in keyPath.

Specified by:

dependentKeys in interface ERDComputingAssignmentInterface

Parameters:

keyPath - to compute significant keys for.

Returns:

array of context keys this assignment depends upon.

fireNow

public Object fireNow(com.webobjects.directtoweb.D2WContext c)

This method is called whenever the propertyKey is requested, but the value in the cache is actually a rule.

Specified by:

fireNow in class ERDDelayedAssignment