org.eclipse.persistence.jpa.jpql.model.query
Class SimpleStateObject

java.lang.Object
  org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
      org.eclipse.persistence.jpa.jpql.model.query.SimpleStateObject

All Implemented Interfaces:

StateObject

Direct Known Subclasses:

AbstractSchemaNameStateObject, BadExpressionStateObject, DateTimeStateObject, EntityTypeLiteralStateObject, EnumTypeStateObject, IdentificationVariableStateObject, InputParameterStateObject, KeywordExpressionStateObject, NumericLiteralStateObject, StringLiteralStateObject, UnknownExpressionStateObject

public abstract class SimpleStateObject
extends AbstractStateObject

This StateObject simply holds onto a string.

Version:

2.4

Author:

Pascal Filion

Since:

2.4

Field Summary

static java.lang.String

TEXT_PROPERTY Notifies the text property has changed.

Constructor Summary

protected	SimpleStateObject(StateObject parent) Creates a new SimpleStateObject.
protected	SimpleStateObject(StateObject parent, java.lang.String text) Creates a new SimpleStateObject.

Method Summary

java.lang.String	getText() Returns the text held by this state object.
boolean	hasText() Determines whether this state object is holding a non-empty string.
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	setText(java.lang.String text) Sets the text held by this state object.
protected void	setTextInternally(java.lang.String text) Sets the text to the given value without notifying the listeners.
protected void	toTextInternal(java.lang.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.model.query.AbstractStateObject

acceptUnknownVisitor, acceptUnknownVisitor, addChildren, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getExpression, 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

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

accept

Field Detail

TEXT_PROPERTY

public static final java.lang.String TEXT_PROPERTY

Notifies the text property has changed.

See Also:

Constant Field Values

Constructor Detail

SimpleStateObject

protected SimpleStateObject(StateObject parent)

Creates a new SimpleStateObject.

Parameters:

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

Throws:

java.lang.NullPointerException - The given parent cannot be null

SimpleStateObject

protected SimpleStateObject(StateObject parent,
                            java.lang.String text)

Creates a new SimpleStateObject.

Parameters:

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

text - The text held by this state object

Throws:

java.lang.NullPointerException - The given parent cannot be null

Method Detail

getText

public java.lang.String getText()

Returns the text held by this state object.

Returns:

This model's text value

hasText

public boolean hasText()

Determines whether this state object is holding a non-empty string.

Returns:

true if the text is non-empty; false otherwise

isEquivalent

public boolean isEquivalent(StateObject stateObject)

Determines whether the given StateObject is equivalent to this one, i.e. the information of both StateObject is the same.

Specified by:

isEquivalent in interface StateObject

Overrides:

isEquivalent in class AbstractStateObject

Parameters:

stateObject - The StateObject to compare its content to this one

Returns:

true if both object are equivalent; false otherwise

setText

public void setText(java.lang.String text)

Sets the text held by this state object.

Parameters:

text - This model's text value

setTextInternally

protected void setTextInternally(java.lang.String text)

Sets the text to the given value without notifying the listeners.

Parameters:

text - This model's text value

toTextInternal

protected void toTextInternal(java.lang.Appendable writer)
                       throws java.io.IOException

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:

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