Direct Known Subclasses:

ClassManagerImpl
```
public class BshClassManager
extends Object
```
BshClassManager manages all classloading in BeanShell. It also supports a dynamically loaded extension (bsh.classpath package) which allows classpath extension and class file reloading. Currently the extension relies on 1.2 for BshClassLoader and weak references. See http://www.beanshell.org/manual/classloading.html for details on the bsh classloader architecture.
Bsh has a multi-tiered class loading architecture. No class loader is used unless/until the classpath is modified or a class is reloaded.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface BshClassManager.Listener

Field Summary

Fields
Modifier and Type	Field	Description
`protected Hashtable`	`absoluteClassCache`	Global cache for things we know are classes.
`protected Hashtable`	`absoluteNonClasses`	Global cache for things we know are not classes.
`protected Hashtable`	`definingClasses`
`protected Hashtable`	`definingClassesBaseNames`
`protected ClassLoader`	`externalClassLoader`	An external classloader supplied by the setClassLoader() command.
`protected Hashtable`	`resolvedObjectMethods`	Caches for resolved object and static methods.
`protected Hashtable`	`resolvedStaticMethods`

Constructor Summary

Constructors
Constructor Description

BshClassManager()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addClassPath(URL path)`
`void`	`addListener(BshClassManager.Listener l)`
`void`	`cacheClassInfo(String name, Class value)`	Cache info about whether name is a class or not.
`void`	`cacheResolvedMethod(Class clas, Class[] types, Method method)`	Cache a resolved (possibly overloaded) method based on the argument types used to invoke it, subject to classloader change.
`boolean`	`classExists(String name)`
`Class`	`classForName(String name)`	Load the specified class by name, taking into account added classpath and reloaded classes, etc.
`protected void`	`classLoaderChanged()`
`protected void`	`clearCaches()`	Clear the caches in BshClassManager
`protected static UtilEvalError`	`cmUnavailable()`
`static BshClassManager`	`createClassManager(Interpreter interpreter)`	Create a new instance of the class manager.
`Class`	`defineClass(String name, byte[] code)`
`protected void`	`definingClass(String className)`	Flag the class name as being in the process of being defined.
`protected void`	`doneDefiningClass(String className)`	Indicate that the specified class name has been defined and may be loaded normally.
`protected void`	`doSuperImport()`	Support for "import *;" Hide details in here as opposed to NameSpace.
`void`	`dump(PrintWriter pw)`
`protected String`	`getClassBeingDefined(String className)`	This method is a temporary workaround used with definingClass.
`protected String`	`getClassNameByUnqName(String name)`	Return the name or null if none is found, Throw an ClassPathException containing detail if name is ambigous.
`protected Method`	`getResolvedMethod(Class clas, String methodName, Class[] types, boolean onlyStatic)`	Return a previously cached resolved method.
`URL`	`getResource(String path)`	Get a resource URL using the BeanShell classpath
`InputStream`	`getResourceAsStream(String path)`	Get a resource stream using the BeanShell classpath
`protected boolean`	`hasSuperImport()`	A "super import" ("import *") operation has been performed.
`protected boolean`	`isClassBeingDefined(String className)`
`protected Class`	`loadSourceClass(String name)`
`protected static Error`	`noClassDefFound(String className, Error e)`	Annotate the NoClassDefFoundError with some info about the class we were trying to load.
`Class`	`plainClassForName(String name)`	Perform a plain Class.forName() or call the externally provided classloader.
`void`	`reloadAllClasses()`	Overlay the entire path with a new class loader.
`void`	`reloadClasses(String[] classNames)`	Reloading classes means creating a new classloader and using it whenever we are asked for classes in the appropriate space.
`void`	`reloadPackage(String pack)`	Reload all classes in the specified package: e.g.
`void`	`removeListener(BshClassManager.Listener l)`
`void`	`reset()`	Clear all loaders and start over.
`void`	`setClassLoader(ClassLoader externalCL)`	Set an external class loader.
`void`	`setClassPath(URL[] cp)`	Set a new base classpath and create a new base classloader.

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

- Field Detail
  - externalClassLoader
```
protected ClassLoader externalClassLoader
```
    An external classloader supplied by the setClassLoader() command.
  - absoluteClassCache
```
protected transient Hashtable absoluteClassCache
```
    Global cache for things we know are classes. Note: these should probably be re-implemented with Soft references. (as opposed to strong or Weak)
  - absoluteNonClasses
```
protected transient Hashtable absoluteNonClasses
```
    Global cache for things we know are *not* classes. Note: these should probably be re-implemented with Soft references. (as opposed to strong or Weak)
  - resolvedObjectMethods
```
protected transient Hashtable resolvedObjectMethods
```
    Caches for resolved object and static methods. We keep these maps separate to support fast lookup in the general case where the method may be either.
  - resolvedStaticMethods
```
protected transient Hashtable resolvedStaticMethods
```
  - definingClasses
```
protected transient Hashtable definingClasses
```
  - definingClassesBaseNames
```
protected transient Hashtable definingClassesBaseNames
```
- Constructor Detail
  - BshClassManager
```
public BshClassManager()
```
- Method Detail
  - createClassManager
```
public static BshClassManager createClassManager(Interpreter interpreter)
```
    Create a new instance of the class manager. Class manager instnaces are now associated with the interpreter.
  - classExists
```
public boolean classExists(String name)
```
  - classForName
```
public Class classForName(String name)
```
    Load the specified class by name, taking into account added classpath and reloaded classes, etc. Note: Again, this is just a trivial implementation. See bsh.classpath.ClassManagerImpl for the fully functional class management package.
    
    Returns:
    
    the class or null
  - loadSourceClass
```
protected Class loadSourceClass(String name)
```
  - plainClassForName
```
public Class plainClassForName(String name)
                        throws ClassNotFoundException
```
    Perform a plain Class.forName() or call the externally provided classloader. If a BshClassManager implementation is loaded the call will be delegated to it, to allow for additional hooks.
    This simply wraps that bottom level class lookup call and provides a central point for monitoring and handling certain Java version dependent bugs, etc.
    
    Returns:
    
    the class
    
    Throws:
    
    ClassNotFoundException
    
    See Also:
    
    classForName( String )
  - getResource
```
public URL getResource(String path)
```
    Get a resource URL using the BeanShell classpath
    
    Parameters:
    
    path - should be an absolute path
  - getResourceAsStream
```
public InputStream getResourceAsStream(String path)
```
    Get a resource stream using the BeanShell classpath
    
    Parameters:
    
    path - should be an absolute path
  - cacheClassInfo
```
public void cacheClassInfo(String name,
                           Class value)
```
    Cache info about whether name is a class or not.
    
    Parameters:
    
    value - if value is non-null, cache the class if value is null, set the flag that it is *not* a class to speed later resolution
  - cacheResolvedMethod
```
public void cacheResolvedMethod(Class clas,
                                Class[] types,
                                Method method)
```
    Cache a resolved (possibly overloaded) method based on the argument types used to invoke it, subject to classloader change. Static and Object methods are cached separately to support fast lookup in the general case where either will do.
  - getResolvedMethod
```
protected Method getResolvedMethod(Class clas,
                                   String methodName,
                                   Class[] types,
                                   boolean onlyStatic)
```
    Return a previously cached resolved method.
    
    Parameters:
    
    onlyStatic - specifies that only a static method may be returned.
    
    Returns:
    
    the Method or null
  - clearCaches
```
protected void clearCaches()
```
    Clear the caches in BshClassManager
  - setClassLoader
```
public void setClassLoader(ClassLoader externalCL)
```
    Set an external class loader. BeanShell will use this at the same point it would otherwise use the plain Class.forName(). i.e. if no explicit classpath management is done from the script (addClassPath(), setClassPath(), reloadClasses()) then BeanShell will only use the supplied classloader. If additional classpath management is done then BeanShell will perform that in addition to the supplied external classloader. However BeanShell is not currently able to reload classes supplied through the external classloader.
  - addClassPath
```
public void addClassPath(URL path)
                  throws IOException
```
    Throws:
    
    IOException
  - reset
```
public void reset()
```
    Clear all loaders and start over. No class loading.
  - setClassPath
```
public void setClassPath(URL[] cp)
                  throws UtilEvalError
```
    Set a new base classpath and create a new base classloader. This means all types change.
    
    Throws:
    
    UtilEvalError
  - reloadAllClasses
```
public void reloadAllClasses()
                      throws UtilEvalError
```
    Overlay the entire path with a new class loader. Set the base path to the user path + base path. No point in including the boot class path (can't reload thos).
    
    Throws:
    
    UtilEvalError
  - reloadClasses
```
public void reloadClasses(String[] classNames)
                   throws UtilEvalError
```
    Reloading classes means creating a new classloader and using it whenever we are asked for classes in the appropriate space. For this we use a DiscreteFilesClassLoader
    
    Throws:
    
    UtilEvalError
  - reloadPackage
```
public void reloadPackage(String pack)
                   throws UtilEvalError
```
    Reload all classes in the specified package: e.g. "com.sun.tools" The special package name "" can be used to refer to unpackaged classes.
    
    Throws:
    
    UtilEvalError
  - doSuperImport
```
protected void doSuperImport()
                      throws UtilEvalError
```
    Support for "import *;" Hide details in here as opposed to NameSpace.
    
    Throws:
    
    UtilEvalError
  - hasSuperImport
```
protected boolean hasSuperImport()
```
    A "super import" ("import *") operation has been performed.
  - getClassNameByUnqName
```
protected String getClassNameByUnqName(String name)
                                throws UtilEvalError
```
    Return the name or null if none is found, Throw an ClassPathException containing detail if name is ambigous.
    
    Throws:
    
    UtilEvalError
  - addListener
```
public void addListener(BshClassManager.Listener l)
```
  - removeListener
```
public void removeListener(BshClassManager.Listener l)
```
  - dump
```
public void dump(PrintWriter pw)
```
  - definingClass
```
protected void definingClass(String className)
```
    Flag the class name as being in the process of being defined. The class manager will not attempt to load it.
  - isClassBeingDefined
```
protected boolean isClassBeingDefined(String className)
```
  - getClassBeingDefined
```
protected String getClassBeingDefined(String className)
```
    This method is a temporary workaround used with definingClass. It is to be removed at some point.
  - doneDefiningClass
```
protected void doneDefiningClass(String className)
```
    Indicate that the specified class name has been defined and may be loaded normally.
  - defineClass
```
public Class defineClass(String name,
                         byte[] code)
```
  - classLoaderChanged
```
protected void classLoaderChanged()
```
  - noClassDefFound
```
protected static Error noClassDefFound(String className,
                                       Error e)
```
    Annotate the NoClassDefFoundError with some info about the class we were trying to load.
  - cmUnavailable
```
protected static UtilEvalError cmUnavailable()
```

Class BshClassManager

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

externalClassLoader

absoluteClassCache

absoluteNonClasses

resolvedObjectMethods

resolvedStaticMethods

definingClasses

definingClassesBaseNames

Constructor Detail

BshClassManager

Method Detail

createClassManager

classExists

classForName

loadSourceClass

plainClassForName

getResource

getResourceAsStream

cacheClassInfo

cacheResolvedMethod

getResolvedMethod

clearCaches

setClassLoader

addClassPath

reset

setClassPath

reloadAllClasses

reloadClasses

reloadPackage

doSuperImport

hasSuperImport

getClassNameByUnqName

addListener

removeListener

dump

definingClass

isClassBeingDefined

getClassBeingDefined

doneDefiningClass

defineClass

classLoaderChanged

noClassDefFound

cmUnavailable