org.aspectj.weaver.tools
Class WeavingAdaptor

java.lang.Object
  org.aspectj.weaver.tools.WeavingAdaptor

All Implemented Interfaces:

org.aspectj.bridge.IMessageContext

Direct Known Subclasses:

ClassLoaderWeavingAdaptor

public class WeavingAdaptor
extends java.lang.Object
implements org.aspectj.bridge.IMessageContext

This adaptor allows the AspectJ compiler to be embedded in an existing system to facilitate load-time weaving. It provides an interface for a weaving class loader to provide a classpath to be woven by a set of aspects. A callback is supplied to allow a class loader to define classes generated by the compiler during the weaving process.

A weaving class loader should create a WeavingAdaptor before any classes are defined, typically during construction. The set of aspects passed to the adaptor is fixed for the lifetime of the adaptor although the classpath can be augmented. A system property can be set to allow verbose weaving messages to be written to the console.

Nested Class Summary

protected class	WeavingAdaptor.WeavingAdaptorMessageHolder Processes messages arising from weaver operations.
protected class	WeavingAdaptor.WeavingAdaptorMessageWriter

Field Summary

protected org.aspectj.weaver.bcel.BcelWorld	bcelWorld
protected org.aspectj.weaver.bcel.BcelObjectType	delegateForCurrentClass
protected java.util.Map	generatedClasses
protected GeneratedClassHandler	generatedClassHandler
static java.lang.String	SHOW_WEAVE_INFO_PROPERTY
static java.lang.String	TRACE_MESSAGES_PROPERTY
protected boolean	verbose
protected org.aspectj.weaver.bcel.BcelWeaver	weaver
static java.lang.String	WEAVING_ADAPTOR_VERBOSE System property used to turn on verbose weaving messages

Constructor Summary

protected	WeavingAdaptor()
	WeavingAdaptor(GeneratedClassHandler handler, java.net.URL[] classURLs, java.net.URL[] aspectURLs) Construct a WeavingAdator with a reference to a GeneratedClassHandler, a full search path for resolving classes and a complete set of aspects.
	WeavingAdaptor(WeavingClassLoader loader) Construct a WeavingAdaptor with a reference to a weaving class loader.

Method Summary

protected boolean	accept(java.lang.String name, byte[] bytes)
void	addURL(java.net.URL url) Appends URL to path used by the WeavingAdptor to resolve classes
protected void	createMessageHandler()
protected boolean	debug(java.lang.String message)
protected void	disable()
protected void	dump(java.lang.String name, byte[] b, boolean before) Dump the given bytcode in _dump/...
protected void	enable()
protected void	ensureDelegateInitialized(java.lang.String name, byte[] bytes)
protected boolean	error(java.lang.String message)
protected boolean	error(java.lang.String message, java.lang.Throwable th)
java.lang.String	getContextId()
protected org.aspectj.bridge.IMessageHandler	getMessageHandler()
org.aspectj.bridge.IMessageHolder	getMessageHolder()
protected boolean	info(java.lang.String message)
protected boolean	isEnabled()
protected void	setMessageHandler(org.aspectj.bridge.IMessageHandler mh)
protected boolean	shouldDump(java.lang.String name, boolean before)
protected boolean	warn(java.lang.String message)
protected boolean	warn(java.lang.String message, java.lang.Throwable th)
byte[]	weaveClass(java.lang.String name, byte[] bytes) Weave a class using aspects previously supplied to the adaptor.

Methods inherited from class java.lang.Object

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

Field Detail

WEAVING_ADAPTOR_VERBOSE

public static final java.lang.String WEAVING_ADAPTOR_VERBOSE

System property used to turn on verbose weaving messages

See Also:

Constant Field Values

SHOW_WEAVE_INFO_PROPERTY

public static final java.lang.String SHOW_WEAVE_INFO_PROPERTY

See Also:

Constant Field Values

TRACE_MESSAGES_PROPERTY

public static final java.lang.String TRACE_MESSAGES_PROPERTY

See Also:

Constant Field Values

verbose

protected boolean verbose

bcelWorld

protected org.aspectj.weaver.bcel.BcelWorld bcelWorld

weaver

protected org.aspectj.weaver.bcel.BcelWeaver weaver

generatedClassHandler

protected GeneratedClassHandler generatedClassHandler

generatedClasses

protected java.util.Map generatedClasses

delegateForCurrentClass

protected org.aspectj.weaver.bcel.BcelObjectType delegateForCurrentClass

Constructor Detail

WeavingAdaptor

protected WeavingAdaptor()

WeavingAdaptor

public WeavingAdaptor(WeavingClassLoader loader)

Construct a WeavingAdaptor with a reference to a weaving class loader. The adaptor will automatically search the class loader hierarchy to resolve classes. The adaptor will also search the hierarchy for WeavingClassLoader instances to determine the set of aspects to be used ofr weaving.

Parameters:

loader - instance of ClassLoader

WeavingAdaptor

public WeavingAdaptor(GeneratedClassHandler handler,
                      java.net.URL[] classURLs,
                      java.net.URL[] aspectURLs)

Construct a WeavingAdator with a reference to a GeneratedClassHandler, a full search path for resolving classes and a complete set of aspects. The search path must include classes loaded by the class loader constructing the WeavingAdaptor and all its parents in the hierarchy.

Parameters:

handler - GeneratedClassHandler

classURLs - the URLs from which to resolve classes

aspectURLs - the aspects used to weave classes defined by this class loader

Method Detail

createMessageHandler

protected void createMessageHandler()

getMessageHandler

protected org.aspectj.bridge.IMessageHandler getMessageHandler()

getMessageHolder

public org.aspectj.bridge.IMessageHolder getMessageHolder()

setMessageHandler

protected void setMessageHandler(org.aspectj.bridge.IMessageHandler mh)

disable

protected void disable()

enable

protected void enable()

isEnabled

protected boolean isEnabled()

addURL

public void addURL(java.net.URL url)

Appends URL to path used by the WeavingAdptor to resolve classes

Parameters:

url - to be appended to search path

weaveClass

public byte[] weaveClass(java.lang.String name,
                         byte[] bytes)
                  throws java.io.IOException

Weave a class using aspects previously supplied to the adaptor.

Parameters:

name - the name of the class

bytes - the class bytes

Returns:

the woven bytes

Throws:

java.io.IOException - weave failed

accept

protected boolean accept(java.lang.String name,
                         byte[] bytes)

shouldDump

protected boolean shouldDump(java.lang.String name,
                             boolean before)

ensureDelegateInitialized

protected void ensureDelegateInitialized(java.lang.String name,
                                         byte[] bytes)

debug

protected boolean debug(java.lang.String message)

info

protected boolean info(java.lang.String message)

warn

protected boolean warn(java.lang.String message)

warn

protected boolean warn(java.lang.String message,
                       java.lang.Throwable th)

error

protected boolean error(java.lang.String message)

error

protected boolean error(java.lang.String message,
                        java.lang.Throwable th)

getContextId

public java.lang.String getContextId()

Specified by:

getContextId in interface org.aspectj.bridge.IMessageContext

dump

protected void dump(java.lang.String name,
                    byte[] b,
                    boolean before)

Dump the given bytcode in _dump/... (dev mode)

Parameters:

name -

b -

before - whether we are dumping before weaving

Throws:

java.lang.Throwable