org.apache.aries.proxy.impl.common
Class AbstractWovenProxyAdapter

java.lang.Object
  org.objectweb.asm.ClassAdapter
      org.apache.aries.proxy.impl.common.AbstractWovenProxyAdapter

All Implemented Interfaces:

org.objectweb.asm.ClassVisitor, org.objectweb.asm.Opcodes

public abstract class AbstractWovenProxyAdapter
extends org.objectweb.asm.ClassAdapter
implements org.objectweb.asm.Opcodes

This abstract superclass is responsible for providing proxy extensions to classes being written. Classes processed by this adapter will implement WovenProxy, and have a static initialiser that populates Method fields for use with the InvocationListener. Known subclasses are WovenProxyAdapter, used to weave classes being loaded by the framework, and InterfaceCombiningClassAdapter which is used to dynamically create objects that implement multiple interfaces

Field Summary

static String	DISPATCHER_FIELD the name of the field used to store the dispatcher
static org.objectweb.asm.Type	DISPATCHER_TYPE The ASM type for the dispatcher
static boolean	IS_AT_LEAST_JAVA_6
protected boolean	isSerializable If we have a no-args constructor then we can delegate there rather than to a super no-args
static int	JAVA_CLASS_VERSION
protected static String	LISTENER_FIELD the name of the field used to store the InvocationListener
protected List<Class<?>>	nonObjectSupers A list of un-woven superclasses between this object and Object, only populated for classes which will directly implement WovenProxy.
static org.objectweb.asm.Type	OBJECT_TYPE
protected Map<String,TypeMethod>	transformedMethods Methods we have transformed and need to create static fields for.
protected org.objectweb.asm.Type	typeBeingWoven The type of this class

Fields inherited from class org.objectweb.asm.ClassAdapter

cv

Fields inherited from interface org.objectweb.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEDYNAMIC_OWNER, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7

Constructor Summary

AbstractWovenProxyAdapter(org.objectweb.asm.ClassVisitor writer, String className, ClassLoader loader)
Create a new adapter for the supplied class

Method Summary

protected abstract org.objectweb.asm.Type	getDeclaringTypeForCurrentMethod() Get the Type which declares the method being currently processed.
Set<org.objectweb.asm.commons.Method>	getKnownMethods()
static String	getSanitizedUUIDString() Get a new UUID suitable for use in method and field names
protected abstract org.objectweb.asm.MethodVisitor	getWeavingMethodVisitor(int access, String name, String desc, String signature, String[] exceptions, org.objectweb.asm.commons.Method currentMethod, String methodStaticFieldName) Get the MethodVisitor that will weave a given method
static void	readClass(Class<?> c, org.objectweb.asm.ClassVisitor adapter) This method will read the bytes for the supplied Class using the supplied ASM ClassVisitor, the reader will skip DEBUG, FRAMES and CODE.
void	visit(int version, int access, String name, String signature, String superName, String[] interfaces)
void	visitEnd() Our class may claim to implement WovenProxy, but doesn't have any implementations! We should fix this.
org.objectweb.asm.MethodVisitor	visitMethod(int access, String name, String desc, String signature, String[] exceptions) This method is called on each method implemented on this object (but not for superclass methods) Each of these methods is visited in turn and the code here generates the byte code for the calls to the InovcationListener around the existing method

Methods inherited from class org.objectweb.asm.ClassAdapter

visitAnnotation, visitAttribute, visitField, visitInnerClass, visitOuterClass, visitSource

Methods inherited from class java.lang.Object

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

Field Detail

LISTENER_FIELD

protected static final String LISTENER_FIELD

the name of the field used to store the InvocationListener

DISPATCHER_FIELD

public static final String DISPATCHER_FIELD

the name of the field used to store the dispatcher

DISPATCHER_TYPE

public static final org.objectweb.asm.Type DISPATCHER_TYPE

The ASM type for the dispatcher

OBJECT_TYPE

public static final org.objectweb.asm.Type OBJECT_TYPE

typeBeingWoven

protected final org.objectweb.asm.Type typeBeingWoven

The type of this class

nonObjectSupers

protected final List<Class<?>> nonObjectSupers

A list of un-woven superclasses between this object and Object, only populated for classes which will directly implement WovenProxy. This list is then used to override any methods that would otherwise be missed by the weaving process.

transformedMethods

protected final Map<String,TypeMethod> transformedMethods

Methods we have transformed and need to create static fields for. Stored as field name to TypeMethod so we know which Class to reflect them off

isSerializable

protected boolean isSerializable

If we have a no-args constructor then we can delegate there rather than to a super no-args

JAVA_CLASS_VERSION

public static final int JAVA_CLASS_VERSION

IS_AT_LEAST_JAVA_6

public static final boolean IS_AT_LEAST_JAVA_6

Constructor Detail

AbstractWovenProxyAdapter

public AbstractWovenProxyAdapter(org.objectweb.asm.ClassVisitor writer,
                                 String className,
                                 ClassLoader loader)

Create a new adapter for the supplied class

Parameters:

writer - The ClassWriter to delegate to

className - The name of this class

loader - The ClassLoader loading this class

Method Detail

visit

public final void visit(int version,
                        int access,
                        String name,
                        String signature,
                        String superName,
                        String[] interfaces)

Specified by:

visit in interface org.objectweb.asm.ClassVisitor

Overrides:

visit in class org.objectweb.asm.ClassAdapter

visitMethod

public final org.objectweb.asm.MethodVisitor visitMethod(int access,
                                                         String name,
                                                         String desc,
                                                         String signature,
                                                         String[] exceptions)

This method is called on each method implemented on this object (but not for superclass methods) Each of these methods is visited in turn and the code here generates the byte code for the calls to the InovcationListener around the existing method

Specified by:

visitMethod in interface org.objectweb.asm.ClassVisitor

Overrides:

visitMethod in class org.objectweb.asm.ClassAdapter

visitEnd

public void visitEnd()

Our class may claim to implement WovenProxy, but doesn't have any implementations! We should fix this.

Specified by:

visitEnd in interface org.objectweb.asm.ClassVisitor

Overrides:

visitEnd in class org.objectweb.asm.ClassAdapter

getKnownMethods

public Set<org.objectweb.asm.commons.Method> getKnownMethods()

getWeavingMethodVisitor

protected abstract org.objectweb.asm.MethodVisitor getWeavingMethodVisitor(int access,
                                                                           String name,
                                                                           String desc,
                                                                           String signature,
                                                                           String[] exceptions,
                                                                           org.objectweb.asm.commons.Method currentMethod,
                                                                           String methodStaticFieldName)

Get the MethodVisitor that will weave a given method

Parameters:

access -

name -

desc -

signature -

exceptions -

currentMethod -

methodStaticFieldName -

Returns:

getDeclaringTypeForCurrentMethod

protected abstract org.objectweb.asm.Type getDeclaringTypeForCurrentMethod()

Get the Type which declares the method being currently processed. For class weaving this will be the typeBeingWoven, for dynamic interface implementation this will be the interface type.

Returns:

getSanitizedUUIDString

public static final String getSanitizedUUIDString()

Get a new UUID suitable for use in method and field names

Returns:

readClass

public static void readClass(Class<?> c,
                             org.objectweb.asm.ClassVisitor adapter)
                      throws IOException

This method will read the bytes for the supplied Class using the supplied ASM ClassVisitor, the reader will skip DEBUG, FRAMES and CODE.

Parameters:

c -

adapter -

Throws:

IOException