Class NullComparisonExpressionStateObject
- java.lang.Object
-
- org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
-
- org.eclipse.persistence.jpa.jpql.tools.model.query.NullComparisonExpressionStateObject
-
- All Implemented Interfaces:
StateObject
public class NullComparisonExpressionStateObject extends AbstractStateObject
A null comparison tests whether or not the single-valued path expression or input parameter is aNULL
value.BNF:null_comparison_expression ::= {single_valued_path_expression | input_parameter} IS [NOT] NULL
- Since:
- 2.4
- Version:
- 2.4
- Author:
- Pascal Filion
- See Also:
NullComparisonExpression
-
-
Field Summary
Fields Modifier and Type Field Description static java.lang.String
NOT_PROPERTY
Notifies the visibility of theNOT
identifier has changed.static java.lang.String
STATE_OBJECT_PROPERTY
Notifies the state object property has changed.
-
Constructor Summary
Constructors Constructor Description NullComparisonExpressionStateObject(StateObject parent)
Creates a newNullComparisonExpressionStateObject
.NullComparisonExpressionStateObject(StateObject parent, boolean not, java.lang.String path)
Creates a newNullComparisonExpressionStateObject
.NullComparisonExpressionStateObject(StateObject parent, boolean not, StateObject stateObject)
Creates a newNullComparisonExpressionStateObject
.NullComparisonExpressionStateObject(StateObject parent, java.lang.String path)
Creates a newNullComparisonExpressionStateObject
.NullComparisonExpressionStateObject(StateObject parent, StateObject stateObject)
Creates a newNullComparisonExpressionStateObject
.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accept(StateObjectVisitor visitor)
Visits thisStateObject
by the givenvisitor
.NullComparisonExpressionStateObject
addNot()
Makes sure theNOT
identifier is specified.NullComparisonExpression
getExpression()
Returns the actual parsed object if thisStateObject
representation of the JPQL query was created by parsing an existing JPQL query.StateObject
getStateObject()
Returns theStateObject
representing the collection-valued path expression.boolean
hasNot()
Determines whether theNOT
identifier is used or not.boolean
hasStateObject()
Determines whether there is aStateObject
representing the collection-valued path expression.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(NullComparisonExpression 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)
Sets the givenStateObject
as the collection-valued path expression.void
toggleNot()
Changes the visibility state of theNOT
identifier.-
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 java.lang.String NOT_PROPERTY
Notifies the visibility of theNOT
identifier has changed.
-
STATE_OBJECT_PROPERTY
public static final java.lang.String STATE_OBJECT_PROPERTY
Notifies the state object property has changed.- See Also:
- Constant Field Values
-
-
Constructor Detail
-
NullComparisonExpressionStateObject
public NullComparisonExpressionStateObject(StateObject parent)
Creates a newNullComparisonExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
- Throws:
java.lang.NullPointerException
- The given parent cannot benull
-
NullComparisonExpressionStateObject
public NullComparisonExpressionStateObject(StateObject parent, boolean not, StateObject stateObject)
Creates a newNullComparisonExpressionStateObject
.- 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 collection-valued path expression- Throws:
java.lang.NullPointerException
- The given parent cannot benull
-
NullComparisonExpressionStateObject
public NullComparisonExpressionStateObject(StateObject parent, boolean not, java.lang.String path)
Creates a newNullComparisonExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
not
- Determines whether theNOT
identifier is part of the expression or notpath
- Either the singled-valued path expression or the input parameter- Throws:
java.lang.NullPointerException
- The given parent cannot benull
-
NullComparisonExpressionStateObject
public NullComparisonExpressionStateObject(StateObject parent, StateObject stateObject)
Creates a newNullComparisonExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
stateObject
- TheStateObject
representing the collection-valued path expression- Throws:
java.lang.NullPointerException
- The given parent cannot benull
-
NullComparisonExpressionStateObject
public NullComparisonExpressionStateObject(StateObject parent, java.lang.String path)
Creates a newNullComparisonExpressionStateObject
.- Parameters:
parent
- The parent of this state object, which cannot benull
path
- Either the singled-valued path expression or the input parameter- Throws:
java.lang.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 NullComparisonExpressionStateObject addNot()
Makes sure theNOT
identifier is specified.- Returns:
- This object
-
getExpression
public NullComparisonExpression 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 classAbstractStateObject
- 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)
-
getStateObject
public StateObject getStateObject()
Returns theStateObject
representing the collection-valued path expression.- Returns:
- The
StateObject
representing the collection-valued path expression
-
hasNot
public boolean hasNot()
Determines whether theNOT
identifier is used or not.- Returns:
true
if theNOT
identifier is part of the expression;false
otherwise
-
hasStateObject
public boolean hasStateObject()
Determines whether there is aStateObject
representing the collection-valued path expression.- Returns:
true
if theStateObject
is notnull
;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 classAbstractStateObject
- 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(NullComparisonExpression 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 the null 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)
Sets the givenStateObject
as the collection-valued path expression.- Parameters:
stateObject
- TheStateObject
that represents the collection-valued path expression
-
toggleNot
public void toggleNot()
Changes the visibility state of theNOT
identifier.
-
-