Aj (AspectJ(tm) weaver API)

java.lang.Object
- org.aspectj.weaver.loadtime.Aj

All Implemented Interfaces:

ClassPreProcessor
```
public class Aj
extends Object
implements ClassPreProcessor
```
Adapter between the generic class pre processor interface and the AspectJ weaver Load time weaving consistency relies on Bcel.setRepository

Author:

Alexandre Vasseur

Field Summary

Fields
Modifier and Type Field and Description

static org.aspectj.weaver.tools.cache.SimpleCache laCache

static List<String> loadersToSkip

Fields
Modifier and Type	Field and Description
`static org.aspectj.weaver.tools.cache.SimpleCache`	`laCache`
`static List<String>`	`loadersToSkip`

Constructor Summary

Constructors
Constructor and Description

Aj()

Aj(IWeavingContext context)

Constructors
Constructor and Description
`Aj()`
`Aj(IWeavingContext context)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`checkQ()` Process the reference queue that contains stale AdaptorKeys - the keys are put on the queue when their classloader referent is garbage collected and so the associated adaptor (weaver) should be removed from the map
`void`	`flushGeneratedClasses(ClassLoader loader)`
`boolean`	`generatedClassesExist(ClassLoader loader)` Check to see if any classes have been generated for a particular classes loader.
`static int`	`getActiveAdaptorCount()`
`String`	`getNamespace(ClassLoader loader)` Returns a namespace based on the contest of the aspects available
`void`	`initialize()` Initialization
`byte[]`	`preProcess(String className, byte[] bytes, ClassLoader loader, ProtectionDomain protectionDomain)` Weave
`static int`	`removeStaleAdaptors(boolean displayProgress)` The reference queue is only processed when a request is made for a weaver adaptor.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - laCache
```
public static org.aspectj.weaver.tools.cache.SimpleCache laCache
```
  - loadersToSkip
```
public static List<String> loadersToSkip
```
- Constructor Detail
  - Aj
```
public Aj()
```
  - Aj
```
public Aj(IWeavingContext context)
```
- Method Detail
  - initialize
```
public void initialize()
```
    Initialization
    
    Specified by:
    
    initialize in interface ClassPreProcessor
  - preProcess
```
public byte[] preProcess(String className,
                         byte[] bytes,
                         ClassLoader loader,
                         ProtectionDomain protectionDomain)
```
    Weave
    
    Specified by:
    
    preProcess in interface ClassPreProcessor
    
    Parameters:
    
    className -
    
    bytes -
    
    loader -
    
    Returns:
    
    woven bytes
  - removeStaleAdaptors
```
public static int removeStaleAdaptors(boolean displayProgress)
```
    The reference queue is only processed when a request is made for a weaver adaptor. This means there can be one or two stale weavers left around. If the user knows they have finished all their weaving, they might wish to call removeStaleAdaptors which will process anything left on the reference queue containing adaptorKeys for garbage collected classloaders.
    
    Parameters:
    
    displayProgress - produce System.err info on the tidying up process
    
    Returns:
    
    number of stale weavers removed
  - getActiveAdaptorCount
```
public static int getActiveAdaptorCount()
```
    Returns:
    
    the number of entries still in the weavingAdaptors map
  - checkQ
```
public static void checkQ()
```
    Process the reference queue that contains stale AdaptorKeys - the keys are put on the queue when their classloader referent is garbage collected and so the associated adaptor (weaver) should be removed from the map
  - getNamespace
```
public String getNamespace(ClassLoader loader)
```
    Returns a namespace based on the contest of the aspects available
  - generatedClassesExist
```
public boolean generatedClassesExist(ClassLoader loader)
```
    Check to see if any classes have been generated for a particular classes loader. Calls ClassLoaderWeavingAdaptor.generatedClassesExist()
    
    Parameters:
    
    loader - the class cloder
    
    Returns:
    
    true if classes have been generated.
  - flushGeneratedClasses
```
public void flushGeneratedClasses(ClassLoader loader)
```

Class Aj

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

laCache

loadersToSkip

Constructor Detail

Aj

Aj

Method Detail

initialize

preProcess

removeStaleAdaptors

getActiveAdaptorCount

checkQ

getNamespace

generatedClassesExist

flushGeneratedClasses