com.webobjects.eocontrol
Class EOArrayDataSource

java.lang.Object
  |
  +--com.webobjects.eocontrol.EODataSource
        |
        +--com.webobjects.eocontrol.EOArrayDataSource

All Implemented Interfaces:

Serializable

public class EOArrayDataSource

extends EODataSource

implements Serializable

EOArrayDataSource is a concrete subclass of EODataSource that can be used to provide enterprise objects to a display group (EODisplayGroup from EOInterface or WODisplayGroup from WebObjects) without having to fetch them from the database. In an EOArrayDataSource, objects are maintained in an NSArray.

EOArrayDataSource can fetch, insert, and delete objects by performing the operations directly on its array. It can also provide a detailed data source.

See Also:

Serialized Form

Constructor Summary

EOArrayDataSource(EOClassDescription desc, EOEditingContext ec)
Creates and returns an EOArrayDataSource object where desc contains information about the objects provided by the EOArrayDataSource and ec is the EOArrayDataSource's editing context.

Method Summary

EOClassDescription	classDescriptionForObjects() Returns the receiver's class description.
Object	createObject() Creates a new object, inserts into the array of objects maintained by the receiver if appropriate, and returns the object.
EODataSource	dataSourceQualifiedByKey(String key) Creates an EODetailDataSource for relationship key.
void	deleteObject(Object eo) Deletes object from the array of objects maintained by the receiver.
EOEditingContext	editingContext() Returns the receiver's editing context.
NSArray	fetchObjects() Returns a copy of the array of objects maintained by the receiver.
void	insertObject(Object eo) Inserts object into the array of objects maintained by the receiver.
void	qualifyWithRelationshipKey(String key, Object source) EOArrayDataSource provides a null implementation of this method.
void	setArray(NSArray array) Sets the receiver's array of objects to array.

Methods inherited from class java.lang.Object

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

Constructor Detail

EOArrayDataSource

public EOArrayDataSource(EOClassDescription desc,
                         EOEditingContext ec)

Creates and returns an EOArrayDataSource object where desc contains information about the objects provided by the EOArrayDataSource and ec is the EOArrayDataSource's editing context. Either argument may be null.

Parameters:

desc - specifies class description that contains information about the objects provided by the EOArrayDataSource

ec - specifies EOArrayDataSource's editing context

Method Detail

classDescriptionForObjects

public EOClassDescription classDescriptionForObjects()

Returns the receiver's class description.

Overrides:

classDescriptionForObjects in class EODataSource

Returns:

returns an EOClassDescription that provides information about the objects provided by the receiver

createObject

public Object createObject()

Creates a new object, inserts into the array of objects maintained by the receiver if appropriate, and returns the object. Returns null if the receiver can't create the object or can't insert it.

Overrides:

createObject in class EODataSource

Returns:

newly created object that has been inserted into the receiver's collection of objects

See Also:

EODataSource.classDescriptionForObjects(), EODataSource.editingContext()

dataSourceQualifiedByKey

public EODataSource dataSourceQualifiedByKey(String key)

Creates an EODetailDataSource for relationship key.

Overrides:

dataSourceQualifiedByKey in class EODataSource

Parameters:

key - relationship key that is the destination object of the relationship

Returns:

detailed EODataSource that provides the destination objects of the relationship

See Also:

EODataSource.qualifyWithRelationshipKey(String key, Object sourceObject)

deleteObject

public void deleteObject(Object eo)

Deletes object from the array of objects maintained by the receiver.

Overrides:

deleteObject in class EODataSource

Parameters:

eo - object to be deleted

editingContext

public EOEditingContext editingContext()

Returns the receiver's editing context.

Overrides:

editingContext in class EODataSource

Returns:

receiver's EOEditingContext

fetchObjects

public NSArray fetchObjects()

Returns a copy of the array of objects maintained by the receiver.

Overrides:

fetchObjects in class EODataSource

Returns:

objects provided by the receiver

insertObject

public void insertObject(Object eo)

Inserts object into the array of objects maintained by the receiver.

Overrides:

insertObject in class EODataSource

Parameters:

eo - object to be inserted

qualifyWithRelationshipKey

public void qualifyWithRelationshipKey(String key,
                                       Object source)

EOArrayDataSource provides a null implementation of this method.

Overrides:

qualifyWithRelationshipKey in class EODataSource

See Also:

(String relationshipKey)

setArray

public void setArray(NSArray array)

Sets the receiver's array of objects to array.

Parameters:

array - specifies receiver's array of objects to array