Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.descriptors

Class InstanceVariableAttributeAccessor

java.lang.Object

org.eclipse.persistence.mappings.AttributeAccessor

org.eclipse.persistence.internal.descriptors.InstanceVariableAttributeAccessor

All Implemented Interfaces:

Serializable, Cloneable, CoreAttributeAccessor

Direct Known Subclasses:

PersistenceObjectAttributeAccessor

public class InstanceVariableAttributeAccessor
extends AttributeAccessor

Purpose: A wrapper class for handling cases when the domain object has instance variable to map to the database field.

Since:

TOPLink/Java 1.0

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Field	attributeField	The attribute name of an object is converted to Field type to access it reflectively

Fields inherited from class org.eclipse.persistence.mappings.AttributeAccessor

attributeName, isReadOnly, isWriteOnly

Constructor Summary

Constructors

Constructor	Description
InstanceVariableAttributeAccessor()

Method Summary

Modifier and Type	Method	Description
Class<?>	getAttributeClass()	Returns the class type of the attribute.
Field	getAttributeField()	Returns the value of attributeField.
Class<?>	getAttributeType()	Returns the declared type of attributeField.
Object	getAttributeValueFromObject(Object anObject)	Returns the value of the attribute on the specified object.
void	initializeAttributes(Class<?> theJavaClass)	instanceVariableName is converted to Field type.
boolean	isInitialized()	Returns true if this attribute accessor has been initialized and now stores a reference to the class's attribute.
boolean	isInstanceVariableAttributeAccessor()
protected void	setAttributeField(Field field)	Sets the value of the attributeField.
void	setAttributeValueInObject(Object anObject, Object value)	Sets the value of the instance variable in the object to the value.

Methods inherited from class org.eclipse.persistence.mappings.AttributeAccessor

clone, getAttributeName, isMapValueAttributeAccessor, isMethodAttributeAccessor, isReadOnly, isValuesAccessor, isVirtualAttributeAccessor, isWriteOnly, setAttributeName, setIsReadOnly, setIsWriteOnly

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

attributeField

protected transient Field attributeField

The attribute name of an object is converted to Field type to access it reflectively

Constructor Details

InstanceVariableAttributeAccessor

public InstanceVariableAttributeAccessor()

Method Details

getAttributeClass

public Class<?> getAttributeClass()

Returns the class type of the attribute.

Specified by:

getAttributeClass in interface CoreAttributeAccessor

Overrides:

getAttributeClass in class AttributeAccessor

getAttributeField

public Field getAttributeField()

Returns the value of attributeField. 266912: For Metamodel API - change visibility from protected

getAttributeType

public Class<?> getAttributeType()

Returns the declared type of attributeField.

getAttributeValueFromObject

public Object getAttributeValueFromObject(Object anObject)
                                   throws DescriptorException

Returns the value of the attribute on the specified object.

Specified by:

getAttributeValueFromObject in interface CoreAttributeAccessor

Specified by:

getAttributeValueFromObject in class AttributeAccessor

Throws:

DescriptorException

initializeAttributes

public void initializeAttributes(Class<?> theJavaClass)
                          throws DescriptorException

instanceVariableName is converted to Field type.

Specified by:

initializeAttributes in interface CoreAttributeAccessor

Overrides:

initializeAttributes in class AttributeAccessor

Throws:

DescriptorException

isInitialized

public boolean isInitialized()

Returns true if this attribute accessor has been initialized and now stores a reference to the class's attribute. An attribute accessor can become uninitialized on serialization.

Overrides:

isInitialized in class AttributeAccessor

isInstanceVariableAttributeAccessor

public boolean isInstanceVariableAttributeAccessor()

Specified by:

isInstanceVariableAttributeAccessor in interface CoreAttributeAccessor

Overrides:

isInstanceVariableAttributeAccessor in class AttributeAccessor

setAttributeField

protected void setAttributeField(Field field)

Sets the value of the attributeField.

setAttributeValueInObject

public void setAttributeValueInObject(Object anObject,
 Object value)
                               throws DescriptorException

Sets the value of the instance variable in the object to the value.

Specified by:

setAttributeValueInObject in interface CoreAttributeAccessor

Specified by:

setAttributeValueInObject in class AttributeAccessor

Throws:

DescriptorException