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EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
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java.lang.Objectorg.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
org.eclipse.persistence.jpa.jpql.model.query.AbstractEncapsulatedExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.ExistsExpressionStateObject
public class ExistsExpressionStateObject
An EXISTS
expression is a predicate that is true
only if the
result of the subquery consists of one or more values and that is false
otherwise.
exists_expression ::= [NOT] EXISTS(subquery)
ExistsExpression
Field Summary | |
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static java.lang.String |
NOT_PROPERTY
Notifies the visibility of the NOT identifier has changed. |
Fields inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
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STATE_OBJECT_PROPERTY |
Constructor Summary | |
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ExistsExpressionStateObject(StateObject parent)
Creates a new ExistsExpressionStateObject . |
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ExistsExpressionStateObject(StateObject parent,
boolean not,
StateObject stateObject)
Creates a new ExistsExpressionStateObject . |
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ExistsExpressionStateObject(StateObject parent,
boolean not,
java.lang.String jpqlFragment)
Creates a new ExistsExpressionStateObject . |
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ExistsExpressionStateObject(StateObject parent,
StateObject stateObject)
Creates a new ExistsExpressionStateObject . |
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ExistsExpressionStateObject(StateObject parent,
java.lang.String jpqlFragment)
Creates a new ExistsExpressionStateObject . |
Method Summary | |
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void |
accept(StateObjectVisitor visitor)
Visits this StateObject by the given visitor . |
ExistsExpressionStateObject |
addNot()
Makes sure the NOT identifier is specified. |
ExistsExpression |
getExpression()
Returns the actual parsed object if this StateObject representation of the JPQL query
was created by parsing an existing JPQL query. |
java.lang.String |
getIdentifier()
Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject . |
protected java.lang.String |
getQueryBNFId()
Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression. |
boolean |
hasNot()
Determines whether the NOT identifier is used or not. |
boolean |
isEquivalent(StateObject stateObject)
Determines whether the given StateObject is equivalent to this one, i.e. the
information of both StateObject is the same. |
void |
removeNot()
Makes sure the NOT identifier is not specified. |
void |
setExpression(ExistsExpression expression)
Keeps a reference of the parsed object object, which should only be
done when this object is instantiated during the conversion of a parsed JPQL query into
StateObjects . |
void |
setNot(boolean not)
Sets whether the NOT identifier should be part of the expression or not. |
void |
setStateObject(StateObject stateObject)
Sets the given StateObject to represent the new encapsulated expression. |
void |
toggleNot()
Changes the visibility state of the NOT identifier. |
protected void |
toTextEncapsulatedExpression(java.lang.Appendable writer)
Prints out a string representation of this encapsulated information, which should not be used to define a true string representation of a JPQL query but should be used for
debugging purposes. |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
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addChildren, getStateObject, hasStateObject, parse |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractEncapsulatedExpressionStateObject |
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toTextInternal |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject |
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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, initialize, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static java.lang.String NOT_PROPERTY
NOT
identifier has changed.
Constructor Detail |
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public ExistsExpressionStateObject(StateObject parent)
ExistsExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
java.lang.NullPointerException
- The given parent cannot be null
public ExistsExpressionStateObject(StateObject parent, boolean not, StateObject stateObject)
ExistsExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
not
- Determines whether the NOT
identifier is part of the expression
or notstateObject
- The StateObject
representing the subquery
java.lang.NullPointerException
- The given parent cannot be null
public ExistsExpressionStateObject(StateObject parent, boolean not, java.lang.String jpqlFragment)
ExistsExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
not
- Determines whether the NOT
identifier is part of the expression
or notjpqlFragment
- The portion of the query representing the encapsulated expression
java.lang.NullPointerException
- The given parent cannot be null
public ExistsExpressionStateObject(StateObject parent, StateObject stateObject)
ExistsExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
stateObject
- The StateObject
representing the subquery
java.lang.NullPointerException
- The given parent cannot be null
public ExistsExpressionStateObject(StateObject parent, java.lang.String jpqlFragment)
ExistsExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
jpqlFragment
- The portion of the query representing the encapsulated expression
java.lang.NullPointerException
- The given parent cannot be null
Method Detail |
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public void accept(StateObjectVisitor visitor)
StateObject
by the given visitor
.
visitor
- The visitor
to visit this objectpublic ExistsExpressionStateObject addNot()
NOT
identifier is specified.
public ExistsExpression getExpression()
StateObject
representation of the JPQL query
was created by parsing an existing JPQL query.
getExpression
in interface StateObject
getExpression
in class AbstractSingleEncapsulatedExpressionStateObject
StateObject
or null
when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
AbstractSingleEncapsulatedExpressionStateObject
.
getIdentifier
in class AbstractEncapsulatedExpressionStateObject
protected java.lang.String getQueryBNFId()
JPQLQueryBNF
that will determine how to parse the encapsulated expression.
getQueryBNFId
in class AbstractSingleEncapsulatedExpressionStateObject
null
ID of the BNFpublic boolean hasNot()
NOT
identifier is used or not.
true
if the NOT
identifier is part of the expression;
false
otherwisepublic boolean isEquivalent(StateObject stateObject)
StateObject
is equivalent to this one, i.e. the
information of both StateObject
is the same.
isEquivalent
in interface StateObject
isEquivalent
in class AbstractSingleEncapsulatedExpressionStateObject
stateObject
- The StateObject
to compare its content to this one
true
if both object are equivalent; false
otherwisepublic void removeNot()
NOT
identifier is not specified.
public void setExpression(ExistsExpression expression)
parsed object
object, which should only be
done when this object is instantiated during the conversion of a parsed JPQL query into
StateObjects
.
expression
- The parsed object
representing an EXISTS
expressionpublic void setNot(boolean not)
NOT
identifier should be part of the expression or not.
not
- true
if the NOT
identifier should be part of the
expression; false
otherwisepublic void setStateObject(StateObject stateObject)
StateObject
to represent the new encapsulated expression.
setStateObject
in class AbstractSingleEncapsulatedExpressionStateObject
stateObject
- The new encapsulated StateObject
public void toggleNot()
NOT
identifier.
protected void toTextEncapsulatedExpression(java.lang.Appendable writer) throws java.io.IOException
true
string representation of a JPQL query but should be used for
debugging purposes.
toTextEncapsulatedExpression
in class AbstractSingleEncapsulatedExpressionStateObject
writer
- The writer used to print out the string representation of the encapsulated
information
java.io.IOException
- This should never happens, only required because Appendable
is
used instead of StringBuilder
for instance
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EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
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