Module org.eclipse.persistence.jpa.jpql

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

Class AbstractEncapsulatedExpressionStateObject

java.lang.Object

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

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

All Implemented Interfaces:

StateObject

Direct Known Subclasses:

AbstractDoubleEncapsulatedExpressionStateObject, AbstractSingleEncapsulatedExpressionStateObject, AbstractTripleEncapsulatedExpressionStateObject, CoalesceExpressionStateObject

public abstract class AbstractEncapsulatedExpressionStateObject
extends AbstractStateObject

This expression handles parsing the identifier followed by an expression encapsulated within parenthesis.

BNF: expression ::= <identifier>(expression)

Since:

2.4

Version:

2.4

See Also:

• AbstractEncapsulatedExpression

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractEncapsulatedExpressionStateObject(StateObject parent)	Creates a new AbstractEncapsulatedExpressionStateObject.

Method Summary

Modifier and Type	Method	Description
AbstractEncapsulatedExpression	getExpression()	Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
abstract String	getIdentifier()	Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject.
protected abstract void	toTextEncapsulatedExpression(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.
protected void	toTextInternal(Appendable writer)	Prints out a string representation of this StateObject, 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.tools.model.query.AbstractStateObject

acceptUnknownVisitor, acceptUnknownVisitor, addChildren, 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, isEquivalent, 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

Methods inherited from interface org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject

accept

Constructor Details

AbstractEncapsulatedExpressionStateObject

protected AbstractEncapsulatedExpressionStateObject(StateObject parent)

Creates a new AbstractEncapsulatedExpressionStateObject.

Parameters:

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

Throws:

NullPointerException - The given parent cannot be null

Method Details

getExpression

public AbstractEncapsulatedExpression 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 AbstractStateObject

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 abstract String getIdentifier()

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

Returns:

The JPQL identifier that is shown before the left parenthesis

toTextEncapsulatedExpression

protected abstract void toTextEncapsulatedExpression(Appendable writer)
                                              throws IOException

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.

Parameters:

writer - The writer used to print out the string representation of the encapsulated information

Throws:

IOException - This should never happens, only required because Appendable is used instead of StringBuilder for instance

toTextInternal

protected void toTextInternal(Appendable writer)
                       throws IOException

Description copied from class: AbstractStateObject

Prints out a string representation of this StateObject, which should not be used to define a true string representation of a JPQL query but should be used for debugging purposes.

Specified by:

toTextInternal in class AbstractStateObject

Parameters:

writer - The writer used to print out the string representation

Throws:

IOException - This should never happens, it is only required because Appendable is used instead of any concrete class