Module org.eclipse.persistence.jpa

Package org.eclipse.persistence.internal.jpa.querydef

Class JoinImpl<Z,X>

java.lang.Object

org.eclipse.persistence.internal.jpa.querydef.SelectionImpl<X>

org.eclipse.persistence.internal.jpa.querydef.ExpressionImpl<X>

org.eclipse.persistence.internal.jpa.querydef.PathImpl<X>

org.eclipse.persistence.internal.jpa.querydef.FromImpl<Z,X>

org.eclipse.persistence.internal.jpa.querydef.JoinImpl<Z,X>

All Implemented Interfaces:

Expression<X>, Fetch<Z,X>, FetchParent<Z,X>, From<Z,X>, Join<Z,X>, Path<X>, Selection<X>, TupleElement<X>, Serializable, Cloneable, InternalExpression, InternalSelection

Direct Known Subclasses:

CollectionJoinImpl, ListJoinImpl, MapJoinImpl, SetJoinImpl

public class JoinImpl<Z,X>
extends FromImpl<Z,X>
implements Join<Z,X>, Fetch<Z,X>

Purpose: Contains the implementation of the Join interface of the JPA criteria API.

Description: This class represents a join of an attribute from a "From"element.

Since:

EclipseLink 1.2

See Also:

• Join
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected JoinType	joinType
protected Expression<Boolean>	on

Fields inherited from class org.eclipse.persistence.internal.jpa.querydef.FromImpl

correlatedParent, fetches, isFetch, isJoin, joins, managedType

Fields inherited from class org.eclipse.persistence.internal.jpa.querydef.PathImpl

modelArtifact, pathParent

Fields inherited from class org.eclipse.persistence.internal.jpa.querydef.ExpressionImpl

isLiteral, literal, metamodel

Fields inherited from class org.eclipse.persistence.internal.jpa.querydef.SelectionImpl

alias, currentNode, javaType

Constructor Summary

Constructors

Constructor	Description
JoinImpl(Path<Z> parentPath, ManagedType managedType, Metamodel metamodel, Class<X> javaClass, Expression expressionNode, Bindable<T> modelArtifact)
JoinImpl(Path<Z> parentPath, ManagedType managedType, Metamodel metamodel, Class<X> javaClass, Expression expressionNode, Bindable<T> modelArtifact, JoinType joinType)
JoinImpl(Path<Z> parentPath, ManagedType managedType, Metamodel metamodel, Class<X> javaClass, Expression expressionNode, Bindable<T> modelArtifact, JoinType joinType, FromImpl correlatedParent)

Method Summary

Modifier and Type	Method	Description
protected <T> Expression<T>	buildExpressionForAs(Class<T> type)
Attribute<? super Z,?>	getAttribute()	Return the metamodel Attribute corresponding to the join.
JoinType	getJoinType()	Return the join type.
Predicate	getOn()
From<?,Z>	getParent()	Return the parent of the join.
JoinImpl<Z,X>	on(Expression<Boolean> restriction)
JoinImpl<Z,X>	on(Predicate... restrictions)

Methods inherited from class org.eclipse.persistence.internal.jpa.querydef.FromImpl

fetch, fetch, fetch, fetch, fetch, fetch, findJoinFetches, findJoins, get, get, get, get, getCorrelationParent, getFetches, getJoins, isCorrelated, isFrom, join, join, join, join, join, join, join, join, join, join, join, join, joinCollection, joinCollection, joinList, joinList, joinMap, joinMap, joinSet, joinSet, type

Methods inherited from class org.eclipse.persistence.internal.jpa.querydef.PathImpl

clone, findRootAndParameters, getModel, getParentPath

Methods inherited from class org.eclipse.persistence.internal.jpa.querydef.ExpressionImpl

as, in, in, in, in, isCompoundExpression, isExpression, isJunction, isLiteral, isNotNull, isNull, isParameter, isPredicate, isSubquery

Methods inherited from class org.eclipse.persistence.internal.jpa.querydef.SelectionImpl

alias, getAlias, getCompoundSelectionItems, getCurrentNode, getJavaType, isCompoundSelection, isConstructor, isRoot, setJavaType

Methods inherited from class java.lang.Object

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

Methods inherited from interface jakarta.persistence.criteria.Expression

as, in, in, in, in, isNotNull, isNull

Methods inherited from interface jakarta.persistence.criteria.FetchParent

fetch, fetch, fetch, fetch, fetch, fetch, getFetches

Methods inherited from interface jakarta.persistence.criteria.From

getCorrelationParent, getJoins, isCorrelated, join, join, join, join, join, join, join, join, join, join, join, join, joinCollection, joinCollection, joinList, joinList, joinMap, joinMap, joinSet, joinSet

Methods inherited from interface jakarta.persistence.criteria.Path

get, get, get, get, getModel, getParentPath, type

Methods inherited from interface jakarta.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface jakarta.persistence.TupleElement

getAlias, getJavaType

Field Details

joinType

protected JoinType joinType

on

protected Expression<Boolean> on

Constructor Details

JoinImpl

public JoinImpl(Path<Z> parentPath,
 ManagedType managedType,
 Metamodel metamodel,
 Class<X> javaClass,
 Expression expressionNode,
 Bindable<T> modelArtifact)

JoinImpl

public JoinImpl(Path<Z> parentPath,
 ManagedType managedType,
 Metamodel metamodel,
 Class<X> javaClass,
 Expression expressionNode,
 Bindable<T> modelArtifact,
 JoinType joinType)

JoinImpl

public JoinImpl(Path<Z> parentPath,
 ManagedType managedType,
 Metamodel metamodel,
 Class<X> javaClass,
 Expression expressionNode,
 Bindable<T> modelArtifact,
 JoinType joinType,
 FromImpl correlatedParent)

Method Details

getAttribute

public Attribute<? super Z,?> getAttribute()

Return the metamodel Attribute corresponding to the join.

Specified by:

getAttribute in interface Fetch<Z,X>

Specified by:

getAttribute in interface Join<Z,X>

Returns:

metamodel Attribute type for the join

getParent

public From<?,Z> getParent()

Return the parent of the join.

Specified by:

getParent in interface Fetch<Z,X>

Specified by:

getParent in interface Join<Z,X>

Returns:

join parent

getJoinType

public JoinType getJoinType()

Return the join type.

Specified by:

getJoinType in interface Fetch<Z,X>

Specified by:

getJoinType in interface Join<Z,X>

Returns:

join type

buildExpressionForAs

protected <T> Expression<T> buildExpressionForAs(Class<T> type)

Overrides:

buildExpressionForAs in class ExpressionImpl<X>

getOn

public Predicate getOn()

Specified by:

getOn in interface Join<Z,X>

on

public JoinImpl<Z,X> on(Expression<Boolean> restriction)

Specified by:

on in interface Join<Z,X>

on

public JoinImpl<Z,X> on(Predicate... restrictions)

Specified by:

on in interface Join<Z,X>