Class RMIClassLoaderSpi
java.lang.Object
java.rmi.server.RMIClassLoaderSpi
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.- Since:
- 1.4
- See Also:
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionabstract StringgetClassAnnotation(Class<?> cl) Provides the implementation forRMIClassLoader.getClassAnnotation(Class).abstract ClassLoadergetClassLoader(String codebase) Provides the implementation forRMIClassLoader.getClassLoader(String).abstract Class<?> loadClass(String codebase, String name, ClassLoader defaultLoader) Provides the implementation forRMIClassLoader.loadClass(URL,String),RMIClassLoader.loadClass(String,String), andRMIClassLoader.loadClass(String,String,ClassLoader).abstract Class<?> loadProxyClass(String codebase, String[] interfaces, ClassLoader defaultLoader) Provides the implementation forRMIClassLoader.loadProxyClass(String,String[],ClassLoader).
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Constructor Details- 
RMIClassLoaderSpipublic RMIClassLoaderSpi()Constructor for subclasses to call.
 
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Method Details- 
loadClasspublic abstract Class<?> loadClass(String codebase, String name, ClassLoader defaultLoader) throws MalformedURLException, ClassNotFoundException Provides the implementation forRMIClassLoader.loadClass(URL,String),RMIClassLoader.loadClass(String,String), andRMIClassLoader.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 givendefaultLoader, 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. - Parameters:
- codebase- the list of URLs (separated by spaces) to load the class from, or- null
- name- the name of the class to load
- defaultLoader- additional contextual class loader to use, or- null
- Returns:
- the Classobject representing the loaded class
- Throws:
- MalformedURLException- if- codebaseis non-- nulland contains an invalid URL, or if- codebaseis- nulland a provider-specific URL used to load classes is invalid
- ClassNotFoundException- if a definition for the class could not be found at the specified location
 
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loadProxyClasspublic abstract Class<?> loadProxyClass(String codebase, String[] interfaces, ClassLoader defaultLoader) throws MalformedURLException, ClassNotFoundException Provides the implementation forRMIClassLoader.loadProxyClass(String,String[],ClassLoader). Loads a dynamic proxy class (seeProxythat 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. - Parameters:
- codebase- the list of URLs (space-separated) to load classes from, or- null
- interfaces- the names of the interfaces for the proxy class to implement
- defaultLoader- additional contextual class loader to use, or- null
- Returns:
- a dynamic proxy class that implements the named interfaces
- Throws:
- MalformedURLException- if- codebaseis non-- nulland contains an invalid URL, or if- codebaseis- nulland a provider-specific URL used to load classes is invalid
- ClassNotFoundException- 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- IllegalArgumentExceptionfor the given interface list)
 
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getClassLoaderProvides the implementation forRMIClassLoader.getClassLoader(String). Returns a class loader that loads classes from the given codebase URL path.- Parameters:
- codebase- the list of URLs (space-separated) from which the returned class loader will load classes from, or- null
- Returns:
- a class loader that loads classes from the given codebase URL path
- Throws:
- MalformedURLException- if- codebaseis non-- nulland contains an invalid URL, or if- codebaseis- nulland a provider-specific URL used to identify the class loader is invalid
 
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getClassAnnotationProvides the implementation forRMIClassLoader.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.- Parameters:
- cl- the class to obtain the annotation for
- Returns:
- a string to be used to annotate the given class when
 it gets marshalled, or null
- Throws:
- NullPointerException- if- clis- null
 
 
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