org.eclipse.persistence.jpa.jpql.model.query
Interface DeclarationStateObject

All Superinterfaces:

StateObject

All Known Implementing Classes:

AbstractFromClauseStateObject, AbstractModifyClauseStateObject, DeleteClauseStateObject, FromClauseStateObject, SimpleFromClauseStateObject, UpdateClauseStateObject

public interface DeclarationStateObject
extends StateObject

This defines the declaration portion of a query, which is the FROM clause of a query.

Version:

2.4

See Also:

FromClauseStateObject, SimpleFromClauseStateObject, DeleteClauseStateObject, UpdateClauseStateObject

Author:

Pascal Filion

Since:

2.4

Method Summary

IterableListIterator<? extends VariableDeclarationStateObject>	declarations() Returns the list of declarations declared in the declaration clause of the current query.
IManagedType	findManagedType(StateObject stateObject) Returns the IManagedType for the given identification variable.
IManagedType	getManagedType(StateObject stateObject) Returns the IManagedType for the given identification variable.

Methods inherited from interface org.eclipse.persistence.jpa.jpql.model.query.StateObject

accept, addPropertyChangeListener, children, decorate, findIdentificationVariable, getDeclaration, getDecorator, getExpression, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, isDecorated, isEquivalent, removePropertyChangeListener, setParent, toString, toText

Method Detail

declarations

IterableListIterator<? extends VariableDeclarationStateObject> declarations()

Returns the list of declarations declared in the declaration clause of the current query.

Returns:

The list of VariableDeclarationStateObject that define the domain of the query

findManagedType

IManagedType findManagedType(StateObject stateObject)

Returns the IManagedType for the given identification variable. If the declaration is for a subquery and there is no managed type associated with the identification then the search will traverse up the query hierarchy.

SELECT e FROM Department d JOIN KEY(d.employees).addresses a

In the above query, the managed type associated with the identification variable:

• d is "Department"
• a is "Address"

Parameters:

stateObject - The StateObject that should be an simple identification variable or an encapsulated identification variable with the identifier KEY or VALUE

Returns:

The IManagedType representing the domain object declared by the given identification variable

See Also:

getManagedType(StateObject)

getManagedType

IManagedType getManagedType(StateObject stateObject)

Returns the IManagedType for the given identification variable. The search does not traverse up the query hierarchy if this declaration is for a subquery.

SELECT e FROM Department d JOIN KEY(d.employees).addresses a

In the above query, the managed type associated with the identification variable:

• d is "Department"
• a is "Address"

Parameters:

stateObject - The StateObject that should be an simple identification variable or an encapsulated identification variable with the identifier KEY or VALUE

Returns:

The IManagedType representing the domain object declared by the given identification variable

See Also:

findManagedType(StateObject)