Package org.datanucleus.enhancer.methods

Class CopyKeyFieldsFromObjectId2

java.lang.Object

org.datanucleus.enhancer.ClassMethod

org.datanucleus.enhancer.methods.CopyKeyFieldsFromObjectId2

public class CopyKeyFieldsFromObjectId2
extends ClassMethod

Method to generate the method "dnCopyKeyFieldsFromObjectId" using ASM. For datastore/nondurable identity

 protected void dnCopyKeyFieldsFromObjectId(Object object)
 {
 }
 

and for SingleFieldIdentity

 protected void dnCopyKeyFieldsFromObjectId(Object oid)
 {
     if (!(oid instanceof YYYIdentity))
         throw new ClassCastException("key class is not YYYIdentity or null");
     YYYIdentity o = (YYYIdentity) oid;
     id = o.getKey();
 }
 

and for user-supplied app identity

 protected void dnCopyKeyFieldsFromObjectId(Object oid)
 {
     if (!(oid instanceof UserPrimaryKey))
         throw new ClassCastException("key class is not mydomain.UserPrimarKey or null");
     UserPrimaryKey o = (UserPrimaryKey) oid;
     try
     {
         zzz1 = o.zzz1;
         zzz2 = o.zzz2;
     }
     catch(Exception e) {}
 }
 

and for CompoundIdentity

 protected void dnCopyKeyFieldsFromObjectId(Object oid)
 {
     if (!(oid instanceof UserPrimaryKey))
         throw new ClassCastException("key class is not mydomain.UserPrimarKey or null");
     UserPrimaryKey o = (UserPrimaryKey) oid;
     try
     {
         zzz1 = o.zzz1;
         zzz2 = (ZZZ) this.dnGetPersistenceManager().getObjectById(o.zzz, false);
     }
     catch (Exception e) {}
 }
 

(the try-catch is for cases where we set the fields with reflection and it can throw an exception). There are some differences for fields .v. properties and also if fields in the PK are private.

Version:

$Revision: 1.21 $

Field Summary

Fields inherited from class org.datanucleus.enhancer.ClassMethod

access, argNames, argTypes, enhancer, exceptions, methodName, returnType, visitor

Constructor Summary

Constructors

Constructor	Description
CopyKeyFieldsFromObjectId2(ClassEnhancer enhancer, String name, int access, Object returnType, Object[] argTypes, String[] argNames)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	execute()	Method to add the contents of the class method.
static CopyKeyFieldsFromObjectId2	getInstance(ClassEnhancer enhancer)

Methods inherited from class org.datanucleus.enhancer.ClassMethod

close, equals, getAccess, getClassEnhancer, getDescriptor, getMethodAdditionMessage, getName, getNamer, hashCode, initialise, initialise

Methods inherited from class java.lang.Object

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

Constructor Detail

CopyKeyFieldsFromObjectId2

public CopyKeyFieldsFromObjectId2(ClassEnhancer enhancer,
                                  String name,
                                  int access,
                                  Object returnType,
                                  Object[] argTypes,
                                  String[] argNames)

Constructor.

Parameters:

enhancer - ClassEnhancer

name - Name of method

access - Access type

returnType - Return type

argTypes - Argument types

argNames - Argument names

Method Detail

getInstance

public static CopyKeyFieldsFromObjectId2 getInstance(ClassEnhancer enhancer)

execute

public void execute()

Method to add the contents of the class method.

Specified by:

execute in class ClassMethod