org.apache.jdo.impl.model.jdo.caching

Class JDOCollectionImplCaching

java.lang.Object

org.apache.jdo.impl.model.jdo.JDOElementImpl

org.apache.jdo.impl.model.jdo.JDORelationshipImpl

org.apache.jdo.impl.model.jdo.JDOCollectionImplDynamic

org.apache.jdo.impl.model.jdo.caching.JDOCollectionImplCaching

All Implemented Interfaces:

JDOCollection, JDOElement, JDORelationship

public class JDOCollectionImplCaching
extends JDOCollectionImplDynamic

An instance of this class represents the JDO relationship metadata of a collection relationship field. This caching implementation caches any calulated value to avoid re-calculating it if it is requested again.

Since:

1.1

Version:

2.0

Author:

Michael Bouschen

Field Summary

Fields inherited from class org.apache.jdo.impl.model.jdo.JDOCollectionImplDynamic

elementType, embeddedElement

Fields inherited from class org.apache.jdo.impl.model.jdo.JDORelationshipImpl

inverse, mappedBy

Fields inherited from interface org.apache.jdo.model.jdo.JDORelationship

CARDINALITY_N, CARDINALITY_ONE, CARDINALITY_ZERO

Constructor Summary

Constructors

Constructor and Description
JDOCollectionImplCaching()

Method Summary

Methods

Modifier and Type	Method and Description
JavaType	getElementType() Get the type representation of the collection elements.
JDORelationship	getInverseRelationship() Get the inverse JDORelationship in the case of a two-way relationship.
JDORelationship	getMappedBy() Get the mappedBy relationship.
boolean	isEmbeddedElement() Determines whether the values of the elements should be stored if possible as part of the instance instead of as their own instances in the datastore.

Methods inherited from class org.apache.jdo.impl.model.jdo.JDOCollectionImplDynamic

getElementTypeName, getRelatedJavaType, isJDOCollection, setElementType, setElementTypeName, setEmbeddedElement

Methods inherited from class org.apache.jdo.impl.model.jdo.JDORelationshipImpl

getDeclaringField, getInverseRelationshipName, getLowerBound, getRelatedJDOClass, getUpperBound, isJDOArray, isJDOMap, isJDOReference, isOwner, setDeclaringField, setInverseRelationship, setLowerBound, setMappedBy, setUpperBound

Methods inherited from class org.apache.jdo.impl.model.jdo.JDOElementImpl

addPropertyChangeListener, addVetoableChangeListener, createJDOExtension, firePropertyChange, fireVetoableChange, getJDOExtensions, removeJDOExtension, removePropertyChangeListener, removeVetoableChangeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jdo.model.jdo.JDORelationship

getDeclaringField, getInverseRelationshipName, getLowerBound, getRelatedJDOClass, getUpperBound, isJDOArray, isJDOMap, isJDOReference, isOwner, setDeclaringField, setInverseRelationship, setLowerBound, setMappedBy, setUpperBound

Methods inherited from interface org.apache.jdo.model.jdo.JDOElement

addPropertyChangeListener, addVetoableChangeListener, createJDOExtension, getJDOExtensions, removeJDOExtension, removePropertyChangeListener, removeVetoableChangeListener

Constructor Detail

JDOCollectionImplCaching

public JDOCollectionImplCaching()

Method Detail

getMappedBy

public JDORelationship getMappedBy()

Get the mappedBy relationship. If there is no mappedBy relationship set, the method checks the mappedBy name as specified in the declaring field and resolves the relationship. The method returns null if there is no mappedBy relationship set and there is no mappedBy name specified on the declaring field.

Specified by:

getMappedBy in interface JDORelationship

Overrides:

getMappedBy in class JDORelationshipImpl

Returns:

the mappedBy relationship if available; null otherwise.

getInverseRelationship

public JDORelationship getInverseRelationship()

Get the inverse JDORelationship in the case of a two-way relationship.

Specified by:

getInverseRelationship in interface JDORelationship

Overrides:

getInverseRelationship in class JDORelationshipImpl

Returns:

the inverse relationship

isEmbeddedElement

public boolean isEmbeddedElement()

Determines whether the values of the elements should be stored if possible as part of the instance instead of as their own instances in the datastore.

Specified by:

isEmbeddedElement in interface JDOCollection

Overrides:

isEmbeddedElement in class JDOCollectionImplDynamic

Returns:

true if the elements should be stored as part of the instance; false otherwise

getElementType

public JavaType getElementType()

Get the type representation of the collection elements.

Specified by:

getElementType in interface JDOCollection

Overrides:

getElementType in class JDOCollectionImplDynamic

Returns:

the element type