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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 | |
|---|---|
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 | |
|---|---|
ExistsExpressionStateObject(StateObject parent)
Creates a new ExistsExpressionStateObject. |
|
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 | |
|---|---|
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 |
|---|
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 |
|---|
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 |
|---|
public ExistsExpressionStateObject(StateObject parent)
ExistsExpressionStateObject.
parent - The parent of this state object, which cannot be null
java.lang.NullPointerException - The given parent cannot be nullpublic ExistsExpressionStateObject(StateObject parent, boolean not, StateObject stateObject)
ExistsExpressionStateObject.
parent - The parent of this state object, which cannot be nullnot - 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 nullpublic ExistsExpressionStateObject(StateObject parent, boolean not, java.lang.String jpqlFragment)
ExistsExpressionStateObject.
parent - The parent of this state object, which cannot be nullnot - 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 nullpublic ExistsExpressionStateObject(StateObject parent, StateObject stateObject)
ExistsExpressionStateObject.
parent - The parent of this state object, which cannot be nullstateObject - The StateObject representing the subquery
java.lang.NullPointerException - The given parent cannot be nullpublic ExistsExpressionStateObject(StateObject parent, java.lang.String jpqlFragment)
ExistsExpressionStateObject.
parent - The parent of this state object, which cannot be nulljpqlFragment - The portion of the query representing the encapsulated expression
java.lang.NullPointerException - The given parent cannot be null| Method Detail |
|---|
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 StateObjectgetExpression in class AbstractSingleEncapsulatedExpressionStateObjectStateObject
or null when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
AbstractSingleEncapsulatedExpressionStateObject.
getIdentifier in class AbstractEncapsulatedExpressionStateObjectprotected java.lang.String getQueryBNFId()
JPQLQueryBNF that will determine how to parse the encapsulated expression.
getQueryBNFId in class AbstractSingleEncapsulatedExpressionStateObjectnull 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 StateObjectisEquivalent in class AbstractSingleEncapsulatedExpressionStateObjectstateObject - 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 AbstractSingleEncapsulatedExpressionStateObjectstateObject - The new encapsulated StateObjectpublic 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 AbstractSingleEncapsulatedExpressionStateObjectwriter - 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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