Package org.eclipse.persistence.mappings.transformers

Class MethodBasedAttributeTransformer

java.lang.Object

org.eclipse.persistence.mappings.transformers.MethodBasedAttributeTransformer

All Implemented Interfaces:

Serializable, AttributeTransformer

public class MethodBasedAttributeTransformer
extends Object
implements AttributeTransformer

Version:

$Header: MethodBasedAttributeTransformer.java 18-sep-2006.14:33:54 gyorke Exp $

See Also:

Serialized Form

Author:

mmacivor

Since:

release specific (what release of product did this appear in) This class is used to preserve the old method of doing Attribute Transformations on a transformation mapping. It is used internally when the older API is used on a TransformationMapping, and handles doing invocations on the user's domain class

Field Summary

Fields

Modifier and Type	Field	Description
protected Method	attributeTransformationMethod
protected AbstractTransformationMapping	mapping
protected String	methodName

Constructor Summary

Constructors

Constructor	Description
MethodBasedAttributeTransformer()
MethodBasedAttributeTransformer(String methodName)

Method Summary

Modifier and Type	Method	Description
Object	buildAttributeValue(Record record, Object object, Session session)	INTERNAL: Build the attribute value by invoking the user's transformation method.
Method	getAttributeTransformationMethod()
String	getMethodName()
void	initialize(AbstractTransformationMapping mapping)	INTERNAL: Initilizes the transformer.
void	setAttributeTransformationMethod(Method theMethod)
void	setMethodName(String name)

Methods inherited from class java.lang.Object

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

Field Detail

attributeTransformationMethod

protected transient Method attributeTransformationMethod

mapping

protected AbstractTransformationMapping mapping

methodName

protected String methodName

Constructor Detail

MethodBasedAttributeTransformer

public MethodBasedAttributeTransformer()

MethodBasedAttributeTransformer

public MethodBasedAttributeTransformer(String methodName)

Method Detail

getMethodName

public String getMethodName()

setMethodName

public void setMethodName(String name)

getAttributeTransformationMethod

public Method getAttributeTransformationMethod()

setAttributeTransformationMethod

public void setAttributeTransformationMethod(Method theMethod)

initialize

public void initialize(AbstractTransformationMapping mapping)

INTERNAL: Initilizes the transformer. Looks up the transformation method on the domain class using reflection. This method can have either 1 or 2 parameters.

Specified by:

initialize in interface AttributeTransformer

Parameters:

mapping - - The mapping associated with this transformer. Only used if some special information is required.

buildAttributeValue

public Object buildAttributeValue(Record record,
                                  Object object,
                                  Session session)

INTERNAL: Build the attribute value by invoking the user's transformation method.

Specified by:

buildAttributeValue in interface AttributeTransformer

Parameters:

record - - The metadata being used to build the object.

object - - The current object that the attribute is being built for.

session - - the current session

Returns:

- The attribute value to be built into the object containing this mapping.