Package org.datanucleus.enhancer.methods

Class CopyField

java.lang.Object

org.datanucleus.enhancer.ClassMethod

org.datanucleus.enhancer.methods.CopyField

public class CopyField
extends ClassMethod

Method to generate the method "dnCopyField" using ASM.

 protected final void dnCopyField(Answer obj, int index)
 {
     switch (index)
     {
         case 0:
             question = obj.question;
             break;
         default:
             throw new IllegalArgumentException("out of field index :" + index);
     }
 }
 

or with superclass

 protected final void dnCopyField(ComplexAnswer obj, int index)
 {
     switch (index - dnInheritedFieldCount)
     {
         case 0:
             param1 = obj.param1;
             break;
         case 1:
             param2 = obj.param2;
             break;
         default:
             super.dnCopyField(obj, index);
     }
 }
 

and also with minor variations if the class has no fields

Field Summary

Fields inherited from class org.datanucleus.enhancer.ClassMethod

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

Constructor Summary

Constructors

Constructor	Description
CopyField(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 CopyField	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

CopyField

public CopyField(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 CopyField getInstance(ClassEnhancer enhancer)

execute

public void execute()

Method to add the contents of the class method.

Specified by:

execute in class ClassMethod