org.datanucleus.enhancer.jdo

Class JDOPropertyGetterAdapter

java.lang.Object

org.objectweb.asm.MethodVisitor

org.datanucleus.enhancer.jdo.JDOPropertyGetterAdapter

public class JDOPropertyGetterAdapter
extends org.objectweb.asm.MethodVisitor

Adapter for property getter methods in JDO-enabled classes. This adapter processes the getXXX method and

• Creates aaaGetXXX with the same code as was present in getXXX
• Changes getXXX to have the code below

When detachable this will be (CHECK_READ variant)

 YYY aaaGetZZZ()
 {
     if (aaaFlags > 0 && aaaStateManager != null && !aaaStateManager.isLoaded(this, 0))
         return (Integer) aaaStateManager.getObjectField(this, 0, aaaGetXXX());
     if (aaaIsDetached() && !((BitSet) aaaDetachedState[2]).get(0))
         throw new DetachedFieldAccessException
             ("You have just attempted to access property \"id\" yet this field was not detached ...");
     return aaaGetXXX();
 }
 

and when not detachable

 YYY aaaGetZZZ()
 {
     if (aaaFlags > 0 && aaaStateManager != null && !aaaStateManager.isLoaded(this, 0))
         return (Integer) aaaStateManager.getObjectField(this, 0, aaaGetXXX());
     return aaaGetXXX();
 }
 

There are other variants for MEDIATE_READ and NORMAL_READ

Field Summary

Fields

Modifier and Type	Field and Description
protected ClassEnhancer	enhancer The enhancer for this class.
protected static Localiser	LOCALISER Localisation of messages.
protected String	methodDescriptor Descriptor for the method being adapted.
protected String	methodName Name for the method being adapted.
protected AbstractMemberMetaData	mmd MetaData for the property.
protected org.objectweb.asm.MethodVisitor	visitor Visitor for the aaaGetXXX method.

Fields inherited from class org.objectweb.asm.MethodVisitor

api, mv

Constructor Summary

Constructors

Constructor and Description
JDOPropertyGetterAdapter(org.objectweb.asm.MethodVisitor mv, ClassEnhancer enhancer, String methodName, String methodDesc, AbstractMemberMetaData mmd, org.objectweb.asm.ClassVisitor cv) Constructor for the method adapter.

Method Summary

Modifier and Type	Method and Description
static void	generateGetXXXMethod(org.objectweb.asm.MethodVisitor mv, AbstractMemberMetaData mmd, String asmClassName, String asmClassDesc, boolean detachListener, boolean includeFrames, EnhancementNamer namer) Convenience method to use the MethodVisitor to generate the code for the method getXXX() for the property with the specified MetaData.
org.objectweb.asm.AnnotationVisitor	visitAnnotation(String arg0, boolean arg1)
org.objectweb.asm.AnnotationVisitor	visitAnnotationDefault()
void	visitAttribute(org.objectweb.asm.Attribute arg0)
void	visitCode()
void	visitEnd() Method called at the end of visiting the getXXX method.
void	visitFieldInsn(int arg0, String arg1, String arg2, String arg3)
void	visitFrame(int arg0, int arg1, Object[] arg2, int arg3, Object[] arg4)
void	visitIincInsn(int arg0, int arg1)
void	visitInsn(int arg0)
void	visitIntInsn(int arg0, int arg1)
void	visitJumpInsn(int arg0, org.objectweb.asm.Label arg1)
void	visitLabel(org.objectweb.asm.Label arg0)
void	visitLdcInsn(Object arg0)
void	visitLineNumber(int arg0, org.objectweb.asm.Label arg1)
void	visitLocalVariable(String arg0, String arg1, String arg2, org.objectweb.asm.Label arg3, org.objectweb.asm.Label arg4, int arg5)
void	visitLookupSwitchInsn(org.objectweb.asm.Label arg0, int[] arg1, org.objectweb.asm.Label[] arg2)
void	visitMaxs(int arg0, int arg1)
void	visitMethodInsn(int arg0, String arg1, String arg2, String arg3)
void	visitMultiANewArrayInsn(String arg0, int arg1)
org.objectweb.asm.AnnotationVisitor	visitParameterAnnotation(int arg0, String arg1, boolean arg2)
void	visitTableSwitchInsn(int arg0, int arg1, org.objectweb.asm.Label arg2, org.objectweb.asm.Label... arg3)
void	visitTryCatchBlock(org.objectweb.asm.Label arg0, org.objectweb.asm.Label arg1, org.objectweb.asm.Label arg2, String arg3)
void	visitTypeInsn(int arg0, String arg1)
void	visitVarInsn(int arg0, int arg1)

Methods inherited from class org.objectweb.asm.MethodVisitor

visitAnnotableParameterCount, visitInsnAnnotation, visitInvokeDynamicInsn, visitLocalVariableAnnotation, visitMethodInsn, visitParameter, visitTryCatchAnnotation, visitTypeAnnotation

Methods inherited from class java.lang.Object

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

Field Detail

LOCALISER

protected static final Localiser LOCALISER

Localisation of messages.

enhancer

protected ClassEnhancer 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.

mmd

protected AbstractMemberMetaData mmd

MetaData for the property.

visitor

protected org.objectweb.asm.MethodVisitor visitor

Visitor for the aaaGetXXX method.

Constructor Detail

JDOPropertyGetterAdapter

public JDOPropertyGetterAdapter(org.objectweb.asm.MethodVisitor mv,
                                ClassEnhancer enhancer,
                                String methodName,
                                String methodDesc,
                                AbstractMemberMetaData mmd,
                                org.objectweb.asm.ClassVisitor cv)

Constructor for the method adapter.

Parameters:

mv - MethodVisitor

enhancer - ClassEnhancer for the class with the method

methodName - Name of the method

methodDesc - Method descriptor

mmd - MetaData for the property

cv - ClassVisitor

Method Detail

visitEnd

public void visitEnd()

Method called at the end of visiting the getXXX method. This is used to add the aaaGetXXX method with the same code as is present originally in the getXXX method.

Overrides:

visitEnd in class org.objectweb.asm.MethodVisitor

generateGetXXXMethod

public static void generateGetXXXMethod(org.objectweb.asm.MethodVisitor mv,
                                        AbstractMemberMetaData mmd,
                                        String asmClassName,
                                        String asmClassDesc,
                                        boolean detachListener,
                                        boolean includeFrames,
                                        EnhancementNamer namer)

Convenience method to use the MethodVisitor to generate the code for the method getXXX() for the property with the specified MetaData.

Parameters:

mv - MethodVisitor

mmd - MetaData for the property

asmClassName - ASM class name for the owning class

asmClassDesc - ASM descriptor for the owning class

detachListener - true if the generate code must support DetachListener

visitAnnotation

public org.objectweb.asm.AnnotationVisitor visitAnnotation(String arg0,
                                                           boolean arg1)

Overrides:

visitAnnotation in class org.objectweb.asm.MethodVisitor

visitAnnotationDefault

public org.objectweb.asm.AnnotationVisitor visitAnnotationDefault()

Overrides:

visitAnnotationDefault in class org.objectweb.asm.MethodVisitor

visitAttribute

public void visitAttribute(org.objectweb.asm.Attribute arg0)

Overrides:

visitAttribute in class org.objectweb.asm.MethodVisitor

visitCode

public void visitCode()

Overrides:

visitCode in class org.objectweb.asm.MethodVisitor

visitFieldInsn

public void visitFieldInsn(int arg0,
                           String arg1,
                           String arg2,
                           String arg3)

Overrides:

visitFieldInsn in class org.objectweb.asm.MethodVisitor

visitFrame

public void visitFrame(int arg0,
                       int arg1,
                       Object[] arg2,
                       int arg3,
                       Object[] arg4)

Overrides:

visitFrame in class org.objectweb.asm.MethodVisitor

visitIincInsn

public void visitIincInsn(int arg0,
                          int arg1)

Overrides:

visitIincInsn in class org.objectweb.asm.MethodVisitor

visitInsn

public void visitInsn(int arg0)

Overrides:

visitInsn in class org.objectweb.asm.MethodVisitor

visitIntInsn

public void visitIntInsn(int arg0,
                         int arg1)

Overrides:

visitIntInsn in class org.objectweb.asm.MethodVisitor

visitJumpInsn

public void visitJumpInsn(int arg0,
                          org.objectweb.asm.Label arg1)

Overrides:

visitJumpInsn in class org.objectweb.asm.MethodVisitor

visitLabel

public void visitLabel(org.objectweb.asm.Label arg0)

Overrides:

visitLabel in class org.objectweb.asm.MethodVisitor

visitLdcInsn

public void visitLdcInsn(Object arg0)

Overrides:

visitLdcInsn in class org.objectweb.asm.MethodVisitor

visitLineNumber

public void visitLineNumber(int arg0,
                            org.objectweb.asm.Label arg1)

Overrides:

visitLineNumber in class org.objectweb.asm.MethodVisitor

visitLocalVariable

public void visitLocalVariable(String arg0,
                               String arg1,
                               String arg2,
                               org.objectweb.asm.Label arg3,
                               org.objectweb.asm.Label arg4,
                               int arg5)

Overrides:

visitLocalVariable in class org.objectweb.asm.MethodVisitor

visitLookupSwitchInsn

public void visitLookupSwitchInsn(org.objectweb.asm.Label arg0,
                                  int[] arg1,
                                  org.objectweb.asm.Label[] arg2)

Overrides:

visitLookupSwitchInsn in class org.objectweb.asm.MethodVisitor

visitMaxs

public void visitMaxs(int arg0,
                      int arg1)

Overrides:

visitMaxs in class org.objectweb.asm.MethodVisitor

visitMethodInsn

public void visitMethodInsn(int arg0,
                            String arg1,
                            String arg2,
                            String arg3)

Overrides:

visitMethodInsn in class org.objectweb.asm.MethodVisitor

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(String arg0,
                                    int arg1)

Overrides:

visitMultiANewArrayInsn in class org.objectweb.asm.MethodVisitor

visitParameterAnnotation

public org.objectweb.asm.AnnotationVisitor visitParameterAnnotation(int arg0,
                                                                    String arg1,
                                                                    boolean arg2)

Overrides:

visitParameterAnnotation in class org.objectweb.asm.MethodVisitor

visitTableSwitchInsn

public void visitTableSwitchInsn(int arg0,
                                 int arg1,
                                 org.objectweb.asm.Label arg2,
                                 org.objectweb.asm.Label... arg3)

Overrides:

visitTableSwitchInsn in class org.objectweb.asm.MethodVisitor

visitTryCatchBlock

public void visitTryCatchBlock(org.objectweb.asm.Label arg0,
                               org.objectweb.asm.Label arg1,
                               org.objectweb.asm.Label arg2,
                               String arg3)

Overrides:

visitTryCatchBlock in class org.objectweb.asm.MethodVisitor

visitTypeInsn

public void visitTypeInsn(int arg0,
                          String arg1)

Overrides:

visitTypeInsn in class org.objectweb.asm.MethodVisitor

visitVarInsn

public void visitVarInsn(int arg0,
                         int arg1)

Overrides:

visitVarInsn in class org.objectweb.asm.MethodVisitor