Class ExistsExpressionStateObject
- 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.ExistsExpressionStateObject
-
- All Implemented Interfaces:
StateObject
public class ExistsExpressionStateObject extends AbstractSingleEncapsulatedExpressionStateObject
AnEXISTS
expression is a predicate that istrue
only if the result of the subquery consists of one or more values and that isfalse
otherwise.BNF:exists_expression ::= [NOT] EXISTS(subquery)
- Since:
- 2.4
- Version:
- 2.4
- Author:
- Pascal Filion
- See Also:
ExistsExpression
-
-
Field Summary
Fields Modifier and Type Field Description static String
NOT_PROPERTY
Notifies the visibility of theNOT
identifier has changed.-
Fields inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject
STATE_OBJECT_PROPERTY
-
-
Constructor Summary
Constructors Constructor Description ExistsExpressionStateObject(StateObject parent)
Creates a newExistsExpressionStateObject
.ExistsExpressionStateObject(StateObject parent, boolean not, String jpqlFragment)
Creates a newExistsExpressionStateObject
.ExistsExpressionStateObject(StateObject parent, boolean not, StateObject stateObject)
Creates a newExistsExpressionStateObject
.ExistsExpressionStateObject(StateObject parent, String jpqlFragment)
Creates a newExistsExpressionStateObject
.ExistsExpressionStateObject(StateObject parent, StateObject stateObject)
Creates a newExistsExpressionStateObject
.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accept(StateObjectVisitor visitor)
Visits thisStateObject
by the givenvisitor
.ExistsExpressionStateObject
addNot()
Makes sure theNOT
identifier is specified.ExistsExpression
getExpression()
Returns the actual parsed object if thisStateObject
representation of the JPQL query was created by parsing an existing JPQL query.String
getIdentifier()
Returns the JPQL identifier of the expression represented by thisAbstractSingleEncapsulatedExpressionStateObject
.boolean
hasNot()
Determines whether theNOT
identifier is used or not.boolean
isEquivalent(StateObject stateObject)
Determines whether the givenStateObject
is equivalent to this one, i.e.void
removeNot()
Makes sure theNOT
identifier is not specified.void
setExpression(ExistsExpression expression)
Keeps a reference of theparsed object
object, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects
.void
setNot(boolean not)
Sets whether theNOT
identifier should be part of the expression or not.void
setStateObject(StateObject stateObject)
void
toggleNot()
Changes the visibility state of theNOT
identifier.-
Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject
getStateObject, hasStateObject, parse
-
Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
addPropertyChangeListener, children, decorate, equals, findIdentificationVariable, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, isDecorated, removePropertyChangeListener, setExpression, setParent, toString, toString, toText
-
-
-
-
Field Detail
-
NOT_PROPERTY
public static String NOT_PROPERTY
Notifies the visibility of theNOT
identifier has changed.
-
-
Constructor Detail
-
ExistsExpressionStateObject
public ExistsExpressionStateObject(StateObject parent)
Creates a newExistsExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
- Throws:
NullPointerException
- The given parent cannot benull
-
ExistsExpressionStateObject
public ExistsExpressionStateObject(StateObject parent, boolean not, StateObject stateObject)
Creates a newExistsExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
not
- Determines whether theNOT
identifier is part of the expression or notstateObject
- TheStateObject
representing the subquery- Throws:
NullPointerException
- The given parent cannot benull
-
ExistsExpressionStateObject
public ExistsExpressionStateObject(StateObject parent, boolean not, String jpqlFragment)
Creates a newExistsExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
not
- Determines whether theNOT
identifier is part of the expression or notjpqlFragment
- The portion of the query representing the encapsulated expression- Throws:
NullPointerException
- The given parent cannot benull
-
ExistsExpressionStateObject
public ExistsExpressionStateObject(StateObject parent, StateObject stateObject)
Creates a newExistsExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
stateObject
- TheStateObject
representing the subquery- Throws:
NullPointerException
- The given parent cannot benull
-
ExistsExpressionStateObject
public ExistsExpressionStateObject(StateObject parent, String jpqlFragment)
Creates a newExistsExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
jpqlFragment
- The portion of the query representing the encapsulated expression- Throws:
NullPointerException
- The given parent cannot benull
-
-
Method Detail
-
accept
public void accept(StateObjectVisitor visitor)
Visits thisStateObject
by the givenvisitor
.- Parameters:
visitor
- Thevisitor
to visit this object
-
addNot
public ExistsExpressionStateObject addNot()
Makes sure theNOT
identifier is specified.- Returns:
- This object
-
getExpression
public ExistsExpression getExpression()
Returns the actual parsed object if thisStateObject
representation of the JPQL query was created by parsing an existing JPQL query.- Specified by:
getExpression
in interfaceStateObject
- Overrides:
getExpression
in classAbstractSingleEncapsulatedExpressionStateObject
- Returns:
- The parsed object when a JPQL query is parsed and converted into a
StateObject
ornull
when the JPQL query is manually created (i.e. not from a string)
-
getIdentifier
public String getIdentifier()
Returns the JPQL identifier of the expression represented by thisAbstractSingleEncapsulatedExpressionStateObject
.- Specified by:
getIdentifier
in classAbstractEncapsulatedExpressionStateObject
- Returns:
- The JPQL identifier that is shown before the left parenthesis
-
hasNot
public boolean hasNot()
Determines whether theNOT
identifier is used or not.- Returns:
true
if theNOT
identifier is part of the expression;false
otherwise
-
isEquivalent
public boolean isEquivalent(StateObject stateObject)
Determines whether the givenStateObject
is equivalent to this one, i.e. the information of bothStateObject
is the same.- Specified by:
isEquivalent
in interfaceStateObject
- Overrides:
isEquivalent
in classAbstractSingleEncapsulatedExpressionStateObject
- Parameters:
stateObject
- TheStateObject
to compare its content to this one- Returns:
true
if both object are equivalent;false
otherwise
-
removeNot
public void removeNot()
Makes sure theNOT
identifier is not specified.
-
setExpression
public void setExpression(ExistsExpression expression)
Keeps a reference of theparsed object
object, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects
.- Parameters:
expression
- Theparsed object
representing anEXISTS
expression
-
setNot
public void setNot(boolean not)
Sets whether theNOT
identifier should be part of the expression or not.- Parameters:
not
-true
if theNOT
identifier should be part of the expression;false
otherwise
-
setStateObject
public void setStateObject(StateObject stateObject)
-
toggleNot
public void toggleNot()
Changes the visibility state of theNOT
identifier.
-
-