org.eclipse.persistence.jpa.jpql.model.query
Class DerivedPathIdentificationVariableDeclarationStateObject

java.lang.Object
  org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
      org.eclipse.persistence.jpa.jpql.model.query.AbstractListHolderStateObject<JoinStateObject>
          org.eclipse.persistence.jpa.jpql.model.query.AbstractIdentificationVariableDeclarationStateObject
              org.eclipse.persistence.jpa.jpql.model.query.DerivedPathIdentificationVariableDeclarationStateObject

All Implemented Interfaces:

ListHolderStateObject<JoinStateObject>, StateObject, VariableDeclarationStateObject

public class DerivedPathIdentificationVariableDeclarationStateObject
extends AbstractIdentificationVariableDeclarationStateObject

Version:

2.4

Author:

Pascal Filion

Since:

2.4

Field Summary

Fields inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractIdentificationVariableDeclarationStateObject

JOINS_LIST

Constructor Summary

DerivedPathIdentificationVariableDeclarationStateObject(SimpleFromClauseStateObject parent)
Creates a new IdentificationVariableDeclarationStateObject.

DerivedPathIdentificationVariableDeclarationStateObject(SimpleFromClauseStateObject parent, java.lang.String path, java.lang.String identificationVariable)
Creates a new IdentificationVariableDeclarationStateObject.

Method Summary

void	accept(StateObjectVisitor visitor) Visits this StateObject by the given visitor.
protected AbstractRangeVariableDeclarationStateObject	buildRangeVariableDeclarationStateObject() Creates
IManagedType	getManagedType(StateObject stateObject) Returns the IManagedType for the given identification variable.
SimpleFromClauseStateObject	getParent() Returns the parent of this StateObject.
java.lang.String	getPath() Returns the string representation of the path expression, which is either a singled-valued object field or a collection-valued path expression.
DerivedPathVariableDeclarationStateObject	getRangeVariableDeclaration() Returns the StateObject representing the range variable declaration portion.
CollectionValuedPathExpressionStateObject	getRootStateObject() Returns the StateObject representing the "root" for objects which may not be reachable by navigation.
IterableListIterator<JoinStateObject>	items() Returns an IterableListIterator over the children.

Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractIdentificationVariableDeclarationStateObject

addChildren, addInnerJoin, addJoin, addJoin, addJoin, addJoin, addLeftJoin, addLeftOuterJoin, getExpression, getIdentificationVariable, getIdentificationVariableStateObject, getRootPath, identificationVariables, initialize, isEquivalent, listName, parseJoin, setExpression, setIdentificationVariable, setRootPath, toTextInternal

Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractListHolderStateObject

addItem, addItems, addListChangeListener, areChildrenEquivalent, canMoveDown, canMoveUp, getItem, hasItems, itemsSize, moveDown, moveUp, removeItem, removeItems, removeListChangeListener, toStringItems

Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject

acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

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

Constructor Detail

DerivedPathIdentificationVariableDeclarationStateObject

public DerivedPathIdentificationVariableDeclarationStateObject(SimpleFromClauseStateObject parent)

Creates a new IdentificationVariableDeclarationStateObject.

Parameters:

parent - The parent of this state object, which cannot be null

Throws:

java.lang.NullPointerException - The given parent cannot be null

DerivedPathIdentificationVariableDeclarationStateObject

public DerivedPathIdentificationVariableDeclarationStateObject(SimpleFromClauseStateObject parent,
                                                               java.lang.String path,
                                                               java.lang.String identificationVariable)

Creates a new IdentificationVariableDeclarationStateObject.

Parameters:

parent - The parent of this state object, which cannot be null

path - Either the derived singled-valued object field or the collection-valued path expression

identificationVariable - The identification variable defining the given path

Throws:

java.lang.NullPointerException - The given parent cannot be null

Method Detail

accept

public void accept(StateObjectVisitor visitor)

Visits this StateObject by the given visitor.

Parameters:

visitor - The visitor to visit this object

buildRangeVariableDeclarationStateObject

protected AbstractRangeVariableDeclarationStateObject buildRangeVariableDeclarationStateObject()

Creates

Specified by:

buildRangeVariableDeclarationStateObject in class AbstractIdentificationVariableDeclarationStateObject

Returns:

getManagedType

public 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

getParent

public SimpleFromClauseStateObject getParent()

Returns the parent of this StateObject.

Specified by:

getParent in interface StateObject

Overrides:

getParent in class AbstractIdentificationVariableDeclarationStateObject

Returns:

Returns the parent of this StateObject, which is null only when this is the root of the hierarchy

getPath

public java.lang.String getPath()

Returns the string representation of the path expression, which is either a singled-valued object field or a collection-valued path expression.

Returns:

The path expression, which is never null

getRangeVariableDeclaration

public DerivedPathVariableDeclarationStateObject getRangeVariableDeclaration()

Returns the StateObject representing the range variable declaration portion.

Overrides:

getRangeVariableDeclaration in class AbstractIdentificationVariableDeclarationStateObject

Returns:

The concrete instance

getRootStateObject

public CollectionValuedPathExpressionStateObject getRootStateObject()

Returns the StateObject representing the "root" for objects which may not be reachable by navigation.

Overrides:

getRootStateObject in class AbstractIdentificationVariableDeclarationStateObject

Returns:

The StateObject representing one of the possible valid "root"

items

public IterableListIterator<JoinStateObject> items()

Returns an IterableListIterator over the children.

Specified by:

items in interface ListHolderStateObject<JoinStateObject>

Overrides:

items in class AbstractListHolderStateObject<JoinStateObject>

Returns:

An IterableListIterator that is iterating over the children