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Documentation > WebObjects 4.5 >
EOAdaptor Reference
Package:
com.apple.yellow.eoaccess
Interface Description
An EOModelGroup object should have a delegate which can influence
how it finds and loads models. The EOModelGroup instance delegate
can implement the methods below:
In addition to the delegates you assign to EOModelGroup instances,
the EOModelGroup class itself can have a delegate. The class delegate
implements a single method- defaultModelGroup.
For more information, see the EOModelGroup.ClassDelegate interface description.
Instance Methods
public abstract Class classForObjectWithGlobalID(
EOEntity entity,
com.apple.yellow.eocontrol.EOGlobalID globalID)
Used to fine-tune inheritance. The delegate
can use globalID to determine a subclass
to be used in place of the one specified in entity.
public abstract Class entityFailedToLookupClassNamed(
EOEntity entity,
String className)
Invoked when the class name specified for entity
cannot be found at run-time. The delegate can take action (such
as loading a bundle) to provide entity with a class corresponding
to className. If the delegate cannot
provide anything, or if there is no delegate, EOGenericRecord is
used.
public abstract EORelationship entityRelationshipForRow(
EOEntity entity,
NSDictionary row,
EORelationship relationship)
Invoked when relationships are instantiated
for a newly fetched object. The delegate can use the information
in row to determine which entity the target enterprise object should
be associated with, and replace the relationship appropriately.
public abstract EOModel modelGroupEntityWithName(
EOModelGroup group,
String name)
If implemented by the delegate, this method
should search the group for the entity
named name and return the entity's
EOModel. Return null if name is not
an entity in group.
public abstract EOEntity relationshipFailedToLookupDestinationWithName(
EORelationship relationship,
String entityName)
Invoked when loading relationship and the destination
entityName specified in the model file cannot be found in the model
group. This most often occurs when a model references entities in
another model file that can't be found. If the delegate doesn't
implement this method, an exception is raised. If the delegate does
implement this method, the method's return value is set as the
destination entity. if the delegate returns null, the destination
entity is set to null.
public abstract EOEntity subEntityForEntity(
EOEntity entity,
NSDictionary primaryKey)
Allows the delegate to fine-tune inheritance
by indicating from which sub-entity an object should be fetched
based on its primaryKey. The entity returned must be a sub-entity
of entity.