Top Description Constructors Methods
org.eclipse.persistence.internal.jpa.metadata.accessors.mappings

public Class DerivedIdClassAccessor

extends EmbeddedAccessor
Class Inheritance
Imports
org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor, org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotatedElement
A derived id class accessor is found within an entity's embedded id class and is a reference back to a parents id class. Key notes: - any metadata mapped from XML to this class must be compared in the equals method. - any metadata mapped from XML to this class must be handled in the merge method. (merging is done at the accessor/mapping level) - any metadata mapped from XML to this class must be initialized in the initXMLObject method. - methods should be preserved in alphabetical order.
Author
Guy Pelletier
Since
EclipseLink 1.2

Constructor Summary

AccessConstructor and Description
public
DerivedIdClassAccessor(MetadataAnnotatedElement accessibleObject, ClassAccessor classAccessor)

INTERNAL: Constructor called from an Embedabble IdClass.

Method Summary

Modifier and TypeMethod and Description
public boolean
equals(Object
the reference object with which to compare.
objectToCompare)

Overrides org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor.equals.

INTERNAL:
public int
hashCode()

Overrides org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor.hashCode.

Returns a hash code value for the object.
public boolean
isDerivedIdClass()

Overrides org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.isDerivedIdClass.

INTERNAL: Return true if this accessor is a derived id class accessor.
Inherited from org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor:
addConvertaddMapsIdAccessorgetAssociationOverridesgetAttributeOverridesgetConvertsinitXMLObjectisEmbeddedprocesssetAssociationOverridessetAttributeOverridessetConvertsupdateDerivedIdField

Constructor Detail

DerivedIdClassAccessorback to summary
public DerivedIdClassAccessor(MetadataAnnotatedElement accessibleObject, ClassAccessor classAccessor)

INTERNAL: Constructor called from an Embedabble IdClass.

Method Detail

equalsback to summary
public boolean equals(Object objectToCompare)

Overrides org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor.equals.

INTERNAL:

Parameters
objectToCompare:Object

Doc from java.lang.Object.equals.

the reference object with which to compare.

Returns:boolean

Doc from java.lang.Object.equals.

true if this object is the same as the obj argument; false otherwise.

Annotations
@Override
hashCodeback to summary
public int hashCode()

Overrides org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns:int

a hash code value for this object.

Annotations
@Override
isDerivedIdClassback to summary
public boolean isDerivedIdClass()

Overrides org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.isDerivedIdClass.

INTERNAL: Return true if this accessor is a derived id class accessor. That is, an EmbeddedId that has a portion of its accessors mapped through an owning entities ManyToOne relationship using a MapsId.

Annotations
@Override