Module org.eclipse.persistence.jpa.jpql

Package org.eclipse.persistence.jpa.jpql.tools.model.query

Class EncapsulatedIdentificationVariableExpressionStateObject

java.lang.Object

org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject

org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractEncapsulatedExpressionStateObject

org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject

org.eclipse.persistence.jpa.jpql.tools.model.query.EncapsulatedIdentificationVariableExpressionStateObject

All Implemented Interfaces:

StateObject

Direct Known Subclasses:

EntryExpressionStateObject, IndexExpressionStateObject, KeyExpressionStateObject, ObjectExpressionStateObject, ValueExpressionStateObject

public abstract class EncapsulatedIdentificationVariableExpressionStateObject
extends AbstractSingleEncapsulatedExpressionStateObject

This object represents an identification variable that is wrapped by a function.

BNF: <identifier>(identification_variable)

Since:

2.4

Version:

2.4

See Also:

• EncapsulatedIdentificationVariableExpression

Field Summary

Fields

Modifier and Type	Field	Description
static final String	IDENTIFICATION_VARIABLE_PROPERTY	Notifies the identification variable property has changed.

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

STATE_OBJECT_PROPERTY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	EncapsulatedIdentificationVariableExpressionStateObject(StateObject parent)	Creates a new EncapsulatedIdentificationVariableExpressionStateObject.
protected	EncapsulatedIdentificationVariableExpressionStateObject(StateObject parent, String identificationVariable)	Creates a new EncapsulatedIdentificationVariableExpressionStateObject.

Method Summary

Modifier and Type	Method	Description
protected void	checkIntegrity()	Makes sure the cached identification variable and the one owned by IdentificationVariableStateObject are the same.
protected void	clearResolvedObjects()	Clears the values related to the managed type and type.
EncapsulatedIdentificationVariableExpression	getExpression()	Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
String	getIdentificationVariable()	Returns the identification variable.
IManagedType	getManagedType()	Returns the IManagedType associated with the field handled by this object.
protected String	getQueryBNFId()	Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression.
IdentificationVariableStateObject	getStateObject()	Returns the encapsulated StateObject.
IType	getType()	Returns the IType of the field handled by this object.
ITypeDeclaration	getTypeDeclaration()	Returns the ITypeDeclaration of the field handled by this object.
boolean	hasIdentificationVariable()	Determines whether the identification variable has been defined or not.
protected void	initialize()	Initializes this state object.
protected IManagedType	resolveManagedType()	Retrieves the IManagedType that is mapped to the identification variable, if and only if the identification variable is used to declare an entity.
protected IType	resolveType()	Resolves the IType of the property handled by this object.
protected ITypeDeclaration	resolveTypeDeclaration()	Resolves the ITypeDeclaration of the property handled by this object.
void	setIdentificationVariable(String identificationVariable)	Sets the identification variable of this encapsulated expression.

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

addChildren, hasStateObject, isEquivalent, parse, setStateObject, toTextEncapsulatedExpression

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

getIdentifier, toTextInternal

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

acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, 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.tools.model.query.StateObject

accept

Field Details

IDENTIFICATION_VARIABLE_PROPERTY

public static final String IDENTIFICATION_VARIABLE_PROPERTY

Notifies the identification variable property has changed.

See Also:

• Constant Field Values

Constructor Details

EncapsulatedIdentificationVariableExpressionStateObject

protected EncapsulatedIdentificationVariableExpressionStateObject(StateObject parent)

Creates a new EncapsulatedIdentificationVariableExpressionStateObject.

Parameters:

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

Throws:

NullPointerException - The given parent cannot be null

EncapsulatedIdentificationVariableExpressionStateObject

protected EncapsulatedIdentificationVariableExpressionStateObject(StateObject parent,
 String identificationVariable)

Creates a new EncapsulatedIdentificationVariableExpressionStateObject.

Parameters:

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

identificationVariable - The identification variable

Throws:

NullPointerException - The given parent cannot be null

Method Details

checkIntegrity

protected void checkIntegrity()

Makes sure the cached identification variable and the one owned by IdentificationVariableStateObject are the same. If they are not, then clears the cached values related to the type.

clearResolvedObjects

protected void clearResolvedObjects()

Clears the values related to the managed type and type.

getExpression

public EncapsulatedIdentificationVariableExpression getExpression()

Description copied from interface: StateObject

Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.

Specified by:

getExpression in interface StateObject

Overrides:

getExpression in class AbstractSingleEncapsulatedExpressionStateObject

Returns:

The parsed object when a JPQL query is parsed and converted into a StateObject or null when the JPQL query is manually created (i.e. not from a string)

getIdentificationVariable

public String getIdentificationVariable()

Returns the identification variable.

Returns:

The name of the identification variable

getManagedType

public IManagedType getManagedType()

Returns the IManagedType associated with the field handled by this object. If this object does not handle a field that has a IManagedType, then null should be returned.

For example: "SELECT e FROM Employee e", the object for e would be returning the IManagedType for Employee.

Returns:

Either the IManagedType, if it could be resolved; null otherwise

getQueryBNFId

protected String getQueryBNFId()

Description copied from class: AbstractSingleEncapsulatedExpressionStateObject

Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression.

Specified by:

getQueryBNFId in class AbstractSingleEncapsulatedExpressionStateObject

Returns:

The non-null ID of the BNF

getStateObject

public IdentificationVariableStateObject getStateObject()

Description copied from class: AbstractSingleEncapsulatedExpressionStateObject

Returns the encapsulated StateObject.

Overrides:

getStateObject in class AbstractSingleEncapsulatedExpressionStateObject

Returns:

The encapsulated StateObject

getType

public IType getType()

Returns the IType of the field handled by this object.

Returns:

Either the IType of the identification variable or the IType for IType.UNRESOLVABLE_TYPE if it could not be resolved

getTypeDeclaration

public ITypeDeclaration getTypeDeclaration()

Returns the ITypeDeclaration of the field handled by this object.

Returns:

Either the ITypeDeclaration that was resolved by this object or the ITypeDeclaration for IType.UNRESOLVABLE_TYPE if it could not be resolved

hasIdentificationVariable

public boolean hasIdentificationVariable()

Determines whether the identification variable has been defined or not.

Returns:

true if the identification variable has been defined; false otherwise

initialize

protected void initialize()

Description copied from class: AbstractStateObject

Initializes this state object.

Overrides:

initialize in class AbstractStateObject

resolveManagedType

protected IManagedType resolveManagedType()

Retrieves the IManagedType that is mapped to the identification variable, if and only if the identification variable is used to declare an entity.

Returns:

Either the IManagedType declared by the identification variable or null if it could not be resolved

resolveType

protected IType resolveType()

Resolves the IType of the property handled by this object.

Returns:

Either the IType that was resolved by this object or the IType for IType.UNRESOLVABLE_TYPE if it could not be resolved

resolveTypeDeclaration

protected ITypeDeclaration resolveTypeDeclaration()

Resolves the ITypeDeclaration of the property handled by this object.

Returns:

Either the ITypeDeclaration that was resolved by this object or the ITypeDeclaration for IType.UNRESOLVABLE_TYPE if it could not be resolved

setIdentificationVariable

public void setIdentificationVariable(String identificationVariable)

Sets the identification variable of this encapsulated expression.

Parameters:

identificationVariable - The name of the identification variable