org.eclipse.persistence.descriptors

Class InterfacePolicy

java.lang.Object

org.eclipse.persistence.descriptors.InterfacePolicy

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

TablePerClassPolicy

public class InterfacePolicy
extends Object
implements Serializable, Cloneable

Purpose: Allows for a descriptor's implemented interfaces to be configured. Generally Interface Descriptors are used for 1 of 2 reasons:

a. Interface descriptors can be used to query across a set of classes that do not share a table.
b. As a target of a variable one to one mapping.

See Also:

Serialized Form

Since:

TopLink for Java 2.0

Field Summary

Fields

Modifier and Type	Field and Description
protected List<ClassDescriptor>	childDescriptors
protected ClassDescriptor	descriptor
protected Class	implementorDescriptor
protected String	implementorDescriptorClassName
protected List<ClassDescriptor>	parentDescriptors
protected List<String>	parentInterfaceNames
protected List<Class>	parentInterfaces

Constructor Summary

Constructors

Constructor and Description
InterfacePolicy() INTERNAL: Create a new policy.
InterfacePolicy(ClassDescriptor descriptor) INTERNAL: Create a new policy.

Method Summary

Modifier and Type	Method and Description
void	addChildDescriptor(ClassDescriptor childDescriptor) INTERNAL: Add child descriptor to the parent descriptor.
void	addParentDescriptor(ClassDescriptor parentDescriptor) INTERNAL: Add parent descriptor.
void	addParentInterface(Class parentInterface) PUBLIC: Add the parent Interface class.
void	addParentInterfaceName(String parentInterfaceName)
void	convertClassNamesToClasses(ClassLoader classLoader) INTERNAL: Convert all the class-name-based settings in this InheritancePolicy to actual class-based settings.
List<ClassDescriptor>	getChildDescriptors() INTERNAL: Return all the child descriptors.
protected ClassDescriptor	getDescriptor()
Class	getImplementorDescriptor() INTERNAL: Returns the implementor descriptor class.
String	getImplementorDescriptorClassName() INTERNAL: Returns the implementor descriptor class name.
List<ClassDescriptor>	getParentDescriptors() INTERNAL: Return all the parent descriptors.
List<String>	getParentInterfaceNames()
List<Class>	getParentInterfaces() INTERNAL: Return the list of parent interfaces.
boolean	hasChild() INTERNAL: Return if there are any child descriptors.
void	initialize(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Set the vector to store parent interfaces.
boolean	isInterfaceChildDescriptor() INTERNAL: Check if it is a child descriptor.
boolean	isTablePerClassPolicy() INTERNAL:
protected ObjectLevelReadQuery	prepareQuery(ObjectLevelReadQuery query) INTERNAL: Select all objects for a concrete descriptor.
protected Object	selectAllObjects(ReadAllQuery query) INTERNAL: Select all objects for a concrete descriptor.
Object	selectAllObjectsUsingMultipleTableSubclassRead(ReadAllQuery query) INTERNAL: Select all objects for an interface descriptor.
protected Object	selectOneObject(ReadObjectQuery query) INTERNAL: Select one object of any concrete subclass.
Object	selectOneObjectUsingMultipleTableSubclassRead(ReadObjectQuery query) INTERNAL: Select one object of any concrete subclass.
void	setDescriptor(ClassDescriptor descriptor) INTERNAL: Set the descriptor.
void	setImplementorDescriptor(Class implementorDescriptor) INTERNAL: Sets the implementor descriptor class.
void	setImplementorDescriptorClassName(String implementorDescriptorClassName) INTERNAL: Sets the implementor descriptor class name.
void	setParentInterfaceNames(List<String> parentInterfaceNames)
void	setParentInterfaces(List<Class> parentInterfaces) Set the Vector to store parent interfaces.
boolean	usesImplementorDescriptor() INTERNAL: Returns true if this descriptor should be ignored and the implementing descriptor should be used instead.

Methods inherited from class java.lang.Object

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

Field Detail

parentInterfaces

protected List<Class> parentInterfaces

parentInterfaceNames

protected List<String> parentInterfaceNames

parentDescriptors

protected List<ClassDescriptor> parentDescriptors

childDescriptors

protected List<ClassDescriptor> childDescriptors

descriptor

protected ClassDescriptor descriptor

implementorDescriptor

protected Class implementorDescriptor

implementorDescriptorClassName

protected String implementorDescriptorClassName

Constructor Detail

InterfacePolicy

public InterfacePolicy()

INTERNAL: Create a new policy. Only descriptor involved in interface should have a policy.

InterfacePolicy

public InterfacePolicy(ClassDescriptor descriptor)

INTERNAL: Create a new policy. Only descriptor involved in interface should have a policy.

Method Detail

addChildDescriptor

public void addChildDescriptor(ClassDescriptor childDescriptor)

INTERNAL: Add child descriptor to the parent descriptor.

addParentDescriptor

public void addParentDescriptor(ClassDescriptor parentDescriptor)

INTERNAL: Add parent descriptor.

addParentInterface

public void addParentInterface(Class parentInterface)

PUBLIC: Add the parent Interface class. This method should be called once for each parent Interface of the Descriptor.

addParentInterfaceName

public void addParentInterfaceName(String parentInterfaceName)

hasChild

public boolean hasChild()

INTERNAL: Return if there are any child descriptors.

getChildDescriptors

public List<ClassDescriptor> getChildDescriptors()

INTERNAL: Return all the child descriptors.

getDescriptor

protected ClassDescriptor getDescriptor()

getImplementorDescriptor

public Class getImplementorDescriptor()

INTERNAL: Returns the implementor descriptor class.

getImplementorDescriptorClassName

public String getImplementorDescriptorClassName()

INTERNAL: Returns the implementor descriptor class name.

getParentDescriptors

public List<ClassDescriptor> getParentDescriptors()

INTERNAL: Return all the parent descriptors.

getParentInterfaces

public List<Class> getParentInterfaces()

INTERNAL: Return the list of parent interfaces.

getParentInterfaceNames

public List<String> getParentInterfaceNames()

convertClassNamesToClasses

public void convertClassNamesToClasses(ClassLoader classLoader)

INTERNAL: Convert all the class-name-based settings in this InheritancePolicy to actual class-based settings. This method is used when converting a project that has been built with class names to a project with classes. It will also convert referenced classes to the versions of the classes from the classLoader.

initialize

public void initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Set the vector to store parent interfaces.

isInterfaceChildDescriptor

public boolean isInterfaceChildDescriptor()

INTERNAL: Check if it is a child descriptor.

isTablePerClassPolicy

public boolean isTablePerClassPolicy()

INTERNAL:

selectAllObjects

protected Object selectAllObjects(ReadAllQuery query)

INTERNAL: Select all objects for a concrete descriptor.

prepareQuery

protected ObjectLevelReadQuery prepareQuery(ObjectLevelReadQuery query)

INTERNAL: Select all objects for a concrete descriptor.

selectAllObjectsUsingMultipleTableSubclassRead

public Object selectAllObjectsUsingMultipleTableSubclassRead(ReadAllQuery query)
                                                      throws DatabaseException

INTERNAL: Select all objects for an interface descriptor. This is accomplished by selecting for all of the concrete classes and then merging the objects.

Throws:

DatabaseException

selectOneObject

protected Object selectOneObject(ReadObjectQuery query)
                          throws DescriptorException

INTERNAL: Select one object of any concrete subclass.

Throws:

DescriptorException

selectOneObjectUsingMultipleTableSubclassRead

public Object selectOneObjectUsingMultipleTableSubclassRead(ReadObjectQuery query)
                                                     throws DatabaseException,
                                                            QueryException

INTERNAL: Select one object of any concrete subclass.

Throws:

DatabaseException

QueryException

setDescriptor

public void setDescriptor(ClassDescriptor descriptor)

INTERNAL: Set the descriptor.

setImplementorDescriptor

public void setImplementorDescriptor(Class implementorDescriptor)

INTERNAL: Sets the implementor descriptor class.

setImplementorDescriptorClassName

public void setImplementorDescriptorClassName(String implementorDescriptorClassName)

INTERNAL: Sets the implementor descriptor class name.

setParentInterfaces

public void setParentInterfaces(List<Class> parentInterfaces)

Set the Vector to store parent interfaces.

setParentInterfaceNames

public void setParentInterfaceNames(List<String> parentInterfaceNames)

usesImplementorDescriptor

public boolean usesImplementorDescriptor()

INTERNAL: Returns true if this descriptor should be ignored and the implementing descriptor should be used instead.