public abstract class RMIClassLoaderSpi extends Object
RMIClassLoaderSpi
is the service provider interface for RMIClassLoader
. In particular, an RMIClassLoaderSpi
instance provides an implementation of the following static methods of RMIClassLoader
: RMIClassLoader.loadClass(URL,String)
RMIClassLoader.loadClass(String,String)
RMIClassLoader.loadClass(String,String,ClassLoader)
RMIClassLoader.loadProxyClass(String,String[],ClassLoader)
RMIClassLoader.getClassLoader(String)
RMIClassLoader.getClassAnnotation(Class)
RMIClassLoader
for a description of how a provider instance is chosen.Constructor | Description |
---|---|
RMIClassLoaderSpi() |
Constructor for subclasses to call. |
Modifier and Type | Method | Description |
---|---|---|
abstract String |
getClassAnnotation |
Provides the implementation for RMIClassLoader.getClassAnnotation(Class) . |
abstract ClassLoader |
getClassLoader |
Provides the implementation for RMIClassLoader.getClassLoader(String) . |
abstract Class |
loadClass |
Provides the implementation for RMIClassLoader.loadClass(URL,String) , RMIClassLoader.loadClass(String,String) , and RMIClassLoader.loadClass(String,String,ClassLoader) . |
abstract Class |
loadProxyClass |
Provides the implementation for RMIClassLoader.loadProxyClass(String,String[],ClassLoader) . |
public RMIClassLoaderSpi()
public abstract Class<?> loadClass(String codebase, String name, ClassLoader defaultLoader) throws MalformedURLException, ClassNotFoundException
RMIClassLoader.loadClass(URL,String)
, RMIClassLoader.loadClass(String,String)
, and RMIClassLoader.loadClass(String,String,ClassLoader)
. Loads a class from a codebase URL path, optionally using the supplied loader. Typically, a provider implementation will attempt to resolve the named class using the given defaultLoader
, if specified, before attempting to resolve the class from the codebase URL path. An implementation of this method must either return a class with the given name or throw an exception.
codebase
- the list of URLs (separated by spaces) to load the class from, or null
name
- the name of the class to loaddefaultLoader
- additional contextual class loader to use, or null
Class
object representing the loaded classMalformedURLException
- if codebase
is non-null
and contains an invalid URL, or if codebase
is null
and a provider-specific URL used to load classes is invalidClassNotFoundException
- if a definition for the class could not be found at the specified locationpublic abstract Class<?> loadProxyClass(String codebase, String[] interfaces, ClassLoader defaultLoader) throws MalformedURLException, ClassNotFoundException
RMIClassLoader.loadProxyClass(String,String[],ClassLoader)
. Loads a dynamic proxy class (see Proxy
that implements a set of interfaces with the given names from a codebase URL path, optionally using the supplied loader. An implementation of this method must either return a proxy class that implements the named interfaces or throw an exception.
codebase
- the list of URLs (space-separated) to load classes from, or null
interfaces
- the names of the interfaces for the proxy class to implementdefaultLoader
- additional contextual class loader to use, or null
MalformedURLException
- if codebase
is non-null
and contains an invalid URL, or if codebase
is null
and a provider-specific URL used to load classes is invalidClassNotFoundException
- if a definition for one of the named interfaces could not be found at the specified location, or if creation of the dynamic proxy class failed (such as if Proxy.getProxyClass(ClassLoader,Class[])
would throw an IllegalArgumentException
for the given interface list)public abstract ClassLoader getClassLoader(String codebase) throws MalformedURLException
RMIClassLoader.getClassLoader(String)
. Returns a class loader that loads classes from the given codebase URL path. If there is a security manager, its checkPermission
method will be invoked with a RuntimePermission("getClassLoader")
permission; this could result in a SecurityException
. The implementation of this method may also perform further security checks to verify that the calling context has permission to connect to all of the URLs in the codebase URL path.
codebase
- the list of URLs (space-separated) from which the returned class loader will load classes from, or null
MalformedURLException
- if codebase
is non-null
and contains an invalid URL, or if codebase
is null
and a provider-specific URL used to identify the class loader is invalidSecurityException
- if there is a security manager and the invocation of its checkPermission
method fails, or if the caller does not have permission to connect to all of the URLs in the codebase URL pathpublic abstract String getClassAnnotation(Class<?> cl)
RMIClassLoader.getClassAnnotation(Class)
. Returns the annotation string (representing a location for the class definition) that RMI will use to annotate the class descriptor when marshalling objects of the given class.cl
- the class to obtain the annotation fornull
NullPointerException
- if cl
is null
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https://docs.oracle.com/en/java/javase/21/docs/api/java.rmi/java/rmi/server/RMIClassLoaderSpi.html