org.datanucleus.enhancer.asm
Class JdoMethodAdapter

java.lang.Object
  org.objectweb.asm.MethodVisitor
      org.datanucleus.enhancer.asm.JdoMethodAdapter

public class JdoMethodAdapter
extends org.objectweb.asm.MethodVisitor

Adapter for methods in persistence-enabled classes allowing enhancement of direct access to user fields. Currently performs the following updates

• Any GETFIELD on a field of a Persistable class is replaced by a call to aaaGetXXX()
• Any PUTFIELD on a field of a Persistable class is replaced by a call to aaaSetXXX()
• Any clone() method that has no superclass but calls clone() is changed to call aaaSuperClone()
• Any static class initialisation adds on the "InitClass" instructions

Field Summary

protected ASMClassEnhancer	enhancer The enhancer for this class.
protected static org.datanucleus.util.Localiser	LOCALISER Localisation of messages.
protected String	methodDescriptor Descriptor for the method being adapted.
protected String	methodName Name for the method being adapted.

Fields inherited from class org.objectweb.asm.MethodVisitor

api, mv

Constructor Summary

JdoMethodAdapter(org.objectweb.asm.MethodVisitor mv, ASMClassEnhancer enhancer, String methodName, String methodDesc)
Constructor for the method adapter.

Method Summary

void	visitFieldInsn(int opcode, String owner, String name, String desc) Method to intercept any calls to fields.
void	visitInsn(int opcode) Method to intercept any general instructions.
void	visitMethodInsn(int opcode, String owner, String name, String desc) Method to intercept any calls to methods.

Methods inherited from class org.objectweb.asm.MethodVisitor

visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFrame, visitIincInsn, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLocalVariable, visitLookupSwitchInsn, visitMaxs, visitMultiANewArrayInsn, visitParameterAnnotation, visitTableSwitchInsn, visitTryCatchBlock, visitTypeInsn, visitVarInsn

Methods inherited from class java.lang.Object

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

Field Detail

LOCALISER

protected static final org.datanucleus.util.Localiser LOCALISER

Localisation of messages.

enhancer

protected ASMClassEnhancer enhancer

The enhancer for this class.

methodName

protected String methodName

Name for the method being adapted.

methodDescriptor

protected String methodDescriptor

Descriptor for the method being adapted.

Constructor Detail

JdoMethodAdapter

public JdoMethodAdapter(org.objectweb.asm.MethodVisitor mv,
                        ASMClassEnhancer enhancer,
                        String methodName,
                        String methodDesc)

Constructor for the method adapter.

Parameters:

mv - MethodVisitor

enhancer - ClassEnhancer for the class with the method

Method Detail

visitFieldInsn

public void visitFieldInsn(int opcode,
                           String owner,
                           String name,
                           String desc)

Method to intercept any calls to fields.

Overrides:

visitFieldInsn in class org.objectweb.asm.MethodVisitor

Parameters:

opcode - Operation

owner - Owner class

name - Name of the field

desc - Descriptor for the field

visitMethodInsn

public void visitMethodInsn(int opcode,
                            String owner,
                            String name,
                            String desc)

Method to intercept any calls to methods.

Overrides:

visitMethodInsn in class org.objectweb.asm.MethodVisitor

Parameters:

opcode - Operation

owner - Owner class

name - Name of the field

desc - Descriptor for the field

visitInsn

public void visitInsn(int opcode)

Method to intercept any general instructions. We use it to intercept any RETURN on a static initialisation block so we can append to it.

Overrides:

visitInsn in class org.objectweb.asm.MethodVisitor

Parameters:

opcode - Operation