org.datanucleus.enhancer

Class PrimaryKeyGenerator

java.lang.Object

org.datanucleus.enhancer.PrimaryKeyGenerator

public class PrimaryKeyGenerator
extends Object

Class to handle the generation of a PK class for a persistable class. The primary key class is generated as its own class, rather than as an inner class of the original class. NOTE: This will only currently handle persistable fields. If you require persistable properties then get the code and extend this.

Constructor Summary

Constructors

Constructor and Description
PrimaryKeyGenerator(AbstractClassMetaData cmd, ClassEnhancer enhancer) Constructor for a PK generator for the specified class.

Method Summary

Modifier and Type	Method and Description
protected void	addDefaultConstructor(ClassWriter cw) Method to add an empty default constructor.
protected void	addFields(ClassWriter cw) Method to add fields to match the PK fields of the persistable class
protected void	addMethodEquals(ClassWriter cw) Method to add an equals() method.
protected void	addMethodHashCode(ClassWriter cw) Method to add a hashCode() method.
protected void	addMethodToString(ClassWriter cw) Method to add a toString() method.
protected void	addStringConstructor(ClassWriter cw) Method to add a constructor taking in a String.
byte[]	generate() Method to generate the primary key class.
protected String	getTypeNameForField(AbstractMemberMetaData mmd)

Methods inherited from class java.lang.Object

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

Constructor Detail

PrimaryKeyGenerator

public PrimaryKeyGenerator(AbstractClassMetaData cmd,
                           ClassEnhancer enhancer)

Constructor for a PK generator for the specified class.

Parameters:

cmd - Metadata for the class that needs a primary key class

enhancer - The enhancer being used

Method Detail

generate

public byte[] generate()

Method to generate the primary key class.

Returns:

The bytes for this pk class

addFields

protected void addFields(ClassWriter cw)

Method to add fields to match the PK fields of the persistable class

Parameters:

cw - The ClassWriter to use

getTypeNameForField

protected String getTypeNameForField(AbstractMemberMetaData mmd)

addDefaultConstructor

protected void addDefaultConstructor(ClassWriter cw)

Method to add an empty default constructor.

Parameters:

cw - The ClassWriter to use

addStringConstructor

protected void addStringConstructor(ClassWriter cw)

Method to add a constructor taking in a String.

Parameters:

cw - The ClassWriter to use

addMethodToString

protected void addMethodToString(ClassWriter cw)

Method to add a toString() method.

Parameters:

cw - The ClassWriter to use

addMethodEquals

protected void addMethodEquals(ClassWriter cw)

Method to add an equals() method.

Parameters:

cw - The ClassWriter to use

addMethodHashCode

protected void addMethodHashCode(ClassWriter cw)

Method to add a hashCode() method.

Parameters:

cw - The ClassWriter to use