Package org.eclipse.persistence.mappings.querykeys

Class ForeignReferenceQueryKey

java.lang.Object

org.eclipse.persistence.mappings.querykeys.QueryKey

org.eclipse.persistence.mappings.querykeys.ForeignReferenceQueryKey

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

DirectCollectionQueryKey, ManyToManyQueryKey, OneToManyQueryKey, OneToOneQueryKey

public class ForeignReferenceQueryKey
extends QueryKey

Purpose: Define an alias to a foreign object.

Responsibilities:

• Define the reference class of the foreign object.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Expression	joinCriteria
protected java.lang.Class	referenceClass
protected java.lang.String	referenceClassName

Fields inherited from class org.eclipse.persistence.mappings.querykeys.QueryKey

descriptor, name

Constructor Summary

Constructors

Constructor	Description
ForeignReferenceQueryKey()

Method Summary

Modifier and Type	Method	Description
void	convertClassNamesToClasses(java.lang.ClassLoader classLoader)	INTERNAL: Convert all the class-name-based settings in this project to actual class-based settings
Expression	getJoinCriteria()	PUBLIC: Return the join expression for the relationship defined by the query key.
java.lang.Class	getReferenceClass()	PUBLIC: Return the reference class of the relationship.
java.lang.String	getReferenceClassName()	PUBLIC: Return the reference class name of the relationship.
org.eclipse.persistence.internal.helper.DatabaseTable	getReferenceTable(ClassDescriptor desc)	PUBLIC: Returns the reference table.
org.eclipse.persistence.internal.helper.DatabaseTable	getRelationTable(ClassDescriptor referenceDescriptor)	PUBLIC: Returns the relation table.
org.eclipse.persistence.internal.helper.DatabaseTable	getSourceTable()	PUBLIC: Returns the source table.
boolean	isForeignReferenceQueryKey()	INTERNAL: override the isForeignReferenceQueryKey() method in the superclass to return true.
void	setJoinCriteria(Expression joinCriteria)	PUBLIC: Set the join expression for the relationship defined by the query key.
void	setReferenceClass(java.lang.Class referenceClass)	PUBLIC: Set the reference class of the relationship.
void	setReferenceClassName(java.lang.String referenceClassName)	PUBLIC: Set the reference class name for this relationship This is used when projects are built without using classes

Methods inherited from class org.eclipse.persistence.mappings.querykeys.QueryKey

clone, getDescriptor, getName, initialize, isAbstractQueryKey, isCollectionQueryKey, isDirectCollectionQueryKey, isDirectQueryKey, isManyToManyQueryKey, isOneToManyQueryKey, isOneToOneQueryKey, isQueryKey, setDescriptor, setName, toString

Methods inherited from class java.lang.Object

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

Field Detail

referenceClass

protected java.lang.Class referenceClass

referenceClassName

protected java.lang.String referenceClassName

joinCriteria

protected Expression joinCriteria

Constructor Detail

ForeignReferenceQueryKey

public ForeignReferenceQueryKey()

Method Detail

convertClassNamesToClasses

public void convertClassNamesToClasses(java.lang.ClassLoader classLoader)

INTERNAL: Convert all the class-name-based settings in this project to actual class-based settings

Overrides:

convertClassNamesToClasses in class QueryKey

Parameters:

classLoader -

getJoinCriteria

public Expression getJoinCriteria()

PUBLIC: Return the join expression for the relationship defined by the query key.

getReferenceClass

public java.lang.Class getReferenceClass()

PUBLIC: Return the reference class of the relationship.

getReferenceClassName

public java.lang.String getReferenceClassName()

PUBLIC: Return the reference class name of the relationship.

isForeignReferenceQueryKey

public boolean isForeignReferenceQueryKey()

INTERNAL: override the isForeignReferenceQueryKey() method in the superclass to return true.

Overrides:

isForeignReferenceQueryKey in class QueryKey

Returns:

boolean

setJoinCriteria

public void setJoinCriteria(Expression joinCriteria)

PUBLIC: Set the join expression for the relationship defined by the query key.

Example:

     builder.getField("ADDRESS.ADDRESS_ID").equal(builder.getParameter("EMPLOYEE.ADDR_ID");
 

setReferenceClass

public void setReferenceClass(java.lang.Class referenceClass)

PUBLIC: Set the reference class of the relationship. This is not required for direct collection query keys.

setReferenceClassName

public void setReferenceClassName(java.lang.String referenceClassName)

PUBLIC: Set the reference class name for this relationship This is used when projects are built without using classes

Parameters:

referenceClassName -

getSourceTable

public org.eclipse.persistence.internal.helper.DatabaseTable getSourceTable()

PUBLIC: Returns the source table.

getReferenceTable

public org.eclipse.persistence.internal.helper.DatabaseTable getReferenceTable(ClassDescriptor desc)

PUBLIC: Returns the reference table.

getRelationTable

public org.eclipse.persistence.internal.helper.DatabaseTable getRelationTable(ClassDescriptor referenceDescriptor)

PUBLIC: Returns the relation table. Currently only ManyToMany and OneToOne may have relation table. The method is overridden to return null for other subclasses. The returned relationTable still could be null.