Module org.datanucleus

Package org.datanucleus.enhancer.methods

Class ProvideField

java.lang.Object

org.datanucleus.enhancer.ClassMethod

org.datanucleus.enhancer.methods.ProvideField

public class ProvideField
extends ClassMethod

Method to generate the method "dnProvideField" using ASM.

 public void dnProvideField(int fieldIndex)
 {
     if (dnStateManager == null)
         throw new IllegalStateException("state manager is null");
     switch (fieldIndex)
     {
         case 0:
             dnStateManager.providedObjectField(this, fieldIndex, question);
             break;
         default:
             throw new IllegalArgumentException("out of field index :" + fieldIndex);
     }
 }
 

and with a superclass

 public void dnProvideField(int fieldIndex)
 {
     if (dnStateManager == null)
         throw new IllegalStateException("state manager is null");
     switch (fieldIndex - dnInheritedFieldCount)
     {
         case 0:
             dnStateManager.providedStringField(this, fieldIndex, extraInfo);
             break;
         default:
             super.dnProvideField(fieldIndex);
     }
 }
 

with further minor changes when 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
ProvideField(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 ProvideField	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

ProvideField

public ProvideField(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 ProvideField getInstance(ClassEnhancer enhancer)

execute

public void execute()

Method to add the contents of the class method.

Specified by:

execute in class ClassMethod