Package org.datanucleus.enhancer.methods
Class CopyKeyFieldsFromObjectId
java.lang.Object
org.datanucleus.enhancer.ClassMethod
org.datanucleus.enhancer.methods.CopyKeyFieldsFromObjectId
Method to generate the method "dnCopyKeyFieldsFromObjectId" using ASM.
For datastore/nondurable identity this is
public void dnCopyKeyFieldsFromObjectId(Persistable.ObjectIdFieldConsumer fc, Object oid) { }and for SingleFieldIdentity it is
public void dnCopyKeyFieldsFromObjectId(Persistable.ObjectIdFieldConsumer fc, Object oid) { if (fc == null) throw new IllegalArgumentException("ObjectIdFieldConsumer is null"); if (!(oid instanceof YYYIdentity)) throw new ClassCastException("oid is not instanceof YYYIdentity"); YYYIdentity o = (YYYIdentity) oid; fc.storeYYYField(1, o.getKey()); }and for user-defined primary keys
public void dnCopyKeyFieldsFromObjectId(Persistable.ObjectIdFieldConsumer fc, Object oid) { if (fc == null) throw new IllegalArgumentException("ObjectIdFieldConsumer is null"); if (!(oid instanceof UserPrimaryKey)) throw new ClassCastException("oid is not instanceof mydomain.UserPrimaryKey"); UserPrimaryKey o = (UserPrimaryKey) oid; try { fc.storeYYYField(1, o.id); fc.storeZZZField(2, o.name); } catch(Exception e) {} }and for CompoundIdentity
public void dnCopyKeyFieldsFromObjectId(Persistable.ObjectIdFieldConsumer fc, Object oid) { if (fc == null) throw new IllegalArgumentException("ObjectIdFieldConsumer is null"); if (!(oid instanceof UserPrimaryKey)) throw new ClassCastException("oid is not instanceof mydomain.UserPrimaryKey"); UserPrimaryKey o = (UserPrimaryKey) oid; try { fc.storeYYYField(1, o.id); fc.storeZZZField(2, 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.
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Field Summary
Fields inherited from class org.datanucleus.enhancer.ClassMethod
access, argNames, argTypes, enhancer, exceptions, methodName, returnType, visitor
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Constructor Summary
ConstructorsConstructorDescriptionCopyKeyFieldsFromObjectId
(ClassEnhancer enhancer, String name, int access, Object returnType, Object[] argTypes, String[] argNames) Constructor. -
Method Summary
Modifier and TypeMethodDescriptionvoid
execute()
Method to add the contents of the class method.static CopyKeyFieldsFromObjectId
getInstance
(ClassEnhancer enhancer) Methods inherited from class org.datanucleus.enhancer.ClassMethod
close, equals, getAccess, getClassEnhancer, getDescriptor, getMethodAdditionMessage, getName, getNamer, hashCode, initialise, initialise
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Constructor Details
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CopyKeyFieldsFromObjectId
public CopyKeyFieldsFromObjectId(ClassEnhancer enhancer, String name, int access, Object returnType, Object[] argTypes, String[] argNames) Constructor.- Parameters:
enhancer
- ClassEnhancername
- Name of methodaccess
- Access typereturnType
- Return typeargTypes
- Argument typesargNames
- Argument names
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Method Details
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getInstance
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execute
public void execute()Method to add the contents of the class method.- Specified by:
execute
in classClassMethod
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