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

Class SqrtExpressionStateObject

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.SqrtExpressionStateObject

All Implemented Interfaces:

StateObject

public class SqrtExpressionStateObject
extends AbstractSingleEncapsulatedExpressionStateObject

The SQRT function takes a numeric argument and returns a Double.

BNF: expression ::= SQRT(simple_arithmetic_expression)

Since:

2.4

Version:

2.4

Author:

Pascal Filion

See Also:

SqrtExpression

Field Summary

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

STATE_OBJECT_PROPERTY

Constructor Summary

Constructors

Constructor	Description
SqrtExpressionStateObject(StateObject parent)	Creates a new SqrtExpressionStateObject.
SqrtExpressionStateObject(StateObject parent, String jpqlFragment)	Creates a new SqrtExpressionStateObject.
SqrtExpressionStateObject(StateObject parent, StateObject stateObject)	Creates a new SqrtExpressionStateObject.

Method Summary

Modifier and Type	Method	Description
void	accept(StateObjectVisitor visitor)	Visits this StateObject by the given visitor.
SqrtExpression	getExpression()	Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
String	getIdentifier()	Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject.
protected String	getQueryBNFId()	Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression.
void	setExpression(SqrtExpression 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	setStateObject(StateObject stateObject)	Sets the given StateObject to represent the new encapsulated expression.

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

addChildren, getStateObject, hasStateObject, isEquivalent, parse, toTextEncapsulatedExpression

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

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, 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

Constructor Detail

SqrtExpressionStateObject

public SqrtExpressionStateObject(StateObject parent)

Creates a new SqrtExpressionStateObject.

Parameters:

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

Throws:

NullPointerException - The given parent cannot be null

SqrtExpressionStateObject

public SqrtExpressionStateObject(StateObject parent,
                                 StateObject stateObject)

Creates a new SqrtExpressionStateObject.

Parameters:

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

stateObject - The StateObject representing the encapsulated expression

Throws:

NullPointerException - The given parent cannot be null

SqrtExpressionStateObject

public SqrtExpressionStateObject(StateObject parent,
                                 String jpqlFragment)

Creates a new SqrtExpressionStateObject.

Parameters:

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

jpqlFragment - The portion of the query representing the encapsulated expression

Throws:

NullPointerException - The given parent cannot be null

Method Detail

accept

public void accept(StateObjectVisitor visitor)

Description copied from interface: StateObject

Visits this StateObject by the given visitor.

Parameters:

visitor - The visitor to visit this object

getExpression

public SqrtExpression 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)

getIdentifier

public String getIdentifier()

Description copied from class: AbstractEncapsulatedExpressionStateObject

Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject.

Specified by:

getIdentifier in class AbstractEncapsulatedExpressionStateObject

Returns:

The JPQL identifier that is shown before the left parenthesis

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

setExpression

public void setExpression(SqrtExpression 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.

Parameters:

expression - The parsed object representing a SQRT expression

setStateObject

public void setStateObject(StateObject stateObject)

Description copied from class: AbstractSingleEncapsulatedExpressionStateObject

Sets the given StateObject to represent the new encapsulated expression.

Overrides:

setStateObject in class AbstractSingleEncapsulatedExpressionStateObject

Parameters:

stateObject - The new encapsulated StateObject