org.datanucleus.enhancer.asm.method
Class JdoCopyKeyFieldsFromObjectId2

java.lang.Object
  org.datanucleus.enhancer.ClassMethod
      org.datanucleus.enhancer.asm.ASMClassMethod
          org.datanucleus.enhancer.asm.method.JdoCopyKeyFieldsFromObjectId2

public class JdoCopyKeyFieldsFromObjectId2
extends ASMClassMethod

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

 protected void jdoCopyKeyFieldsFromObjectId(Object object)
 {
 }
 

and for SingleFieldIdentity

 protected void jdoCopyKeyFieldsFromObjectId(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 jdoCopyKeyFieldsFromObjectId(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 jdoCopyKeyFieldsFromObjectId(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.jdoGetPersistenceManager().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.asm.ASMClassMethod

visitor

Fields inherited from class org.datanucleus.enhancer.ClassMethod

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

Constructor Summary

JdoCopyKeyFieldsFromObjectId2(ClassEnhancer enhancer, String name, int access, Object returnType, Object[] argTypes, String[] argNames)
Constructor.

Method Summary

void	execute() Method to add the contents of the class method.
static JdoCopyKeyFieldsFromObjectId2	getInstance(ASMClassEnhancer enhancer)

Methods inherited from class org.datanucleus.enhancer.asm.ASMClassMethod

getClassEnhancer, getDescriptor, initialise, initialise

Methods inherited from class org.datanucleus.enhancer.ClassMethod

close, equals, getAccess, getMethodAdditionMessage, getName, hashCode

Methods inherited from class java.lang.Object

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

Constructor Detail

JdoCopyKeyFieldsFromObjectId2

public JdoCopyKeyFieldsFromObjectId2(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 JdoCopyKeyFieldsFromObjectId2 getInstance(ASMClassEnhancer enhancer)

execute

public void execute()

Method to add the contents of the class method.

Specified by:

execute in class ClassMethod