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java.rmi.server
Class RMIClassLoader

java.lang.Object
  |
  +--java.rmi.server.RMIClassLoader

public class RMIClassLoader

extends Object

RMIClassLoader provides static methods for loading classes from a network location (one or more URLs) and obtaining the location from which an existing class can be loaded. These methods are used by the RMI runtime when marshalling and unmarshalling classes of parameters and return values.

Since:

JDK1.1

Method Summary

static String	getClassAnnotation(Class cl) Returns the class annotation (representing the location for a class) that RMI will use to annotate the call stream when marshalling objects of the given class.
static ClassLoader	getClassLoader(String codebase) Returns a class loader that loads classes from the given codebase URL path.
static Object	getSecurityContext(ClassLoader loader) Deprecated. no replacement. As of the Java 2 platform v1.2, RMI no longer uses this method to obtain a class loader's security context.
static Class	loadClass(String name) Deprecated. replaced by loadClass(String,String) method
static Class	loadClass(String codebase, String name) Loads a class from a codebase URL path.
static Class	loadClass(URL codebase, String name) Loads a class from a codebase URL.

Methods inherited from class java.lang.Object

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

Method Detail

loadClass

public static Class loadClass(String name)
                       throws MalformedURLException,
                              ClassNotFoundException

Deprecated. replaced by loadClass(String,String) method

Loads a class from the codebase URL path specified by the java.rmi.server.codebase property.

Parameters:

name - the name of the class to load

Returns:

the Class object representing the loaded class

Throws:

MalformedURLException - if the system property java.rmi.server.codebase contains an invalid URL

ClassNotFoundException - if a definition for the class could not be found at the codebase location

Since:

JDK1.1

See Also:

loadClass(String,String)

loadClass

public static Class loadClass(URL codebase,
                              String name)
                       throws MalformedURLException,
                              ClassNotFoundException

Loads a class from a codebase URL. If the given codebase is null, then the Class object returned is equivalent to the Class object returned by RMIClassLoader.loadClass(name).

Parameters:

codebase - the URL to load the class from

name - the name of the class to load

Returns:

the Class object representing the loaded class

Throws:

MalformedURLException - if the codebase paramater contains an invalid non-null URL

ClassNotFoundException - if a definition for the class could not be found at the specified URL

Since:

JDK1.1

loadClass

public static Class loadClass(String codebase,
                              String name)
                       throws MalformedURLException,
                              ClassNotFoundException

Loads a class from a codebase URL path. If the given codebase is null, then the Class object returned is equivalent to the Class object returned by RMIClassLoader.loadClass(name).

Parameters:

codebase - the list of space-separated URLs to load the class from

name - the name of the class to load

Returns:

the Class object representing the loaded class

Throws:

MalformedURLException - if the codebase paramater contains an invalid non-null URL

ClassNotFoundException - if a definition for the class could not be found at the specified location

Since:

1.2

getClassLoader

public static ClassLoader getClassLoader(String codebase)
                                  throws MalformedURLException,
                                         SecurityException

Returns a class loader that loads classes from the given codebase URL path. The class loader returned is the class loader that the #loadClass(String,String) method would use to load classes from the given codebase. If a class loader with the same codebase URL path already exists for RMI runtime, it will be returned; otherwise, a new class loader will be created. If the given codebase is null, it returns the class loader used to load classes via the #loadClass(String) method.

Parameters:

codebase - the list of space-separated URLs which the the class loader will load classes from

Returns:

a class loader that loads classes from the given codebase URL path

Throws:

MalformedURLException - if the codebase paramater contains an invalid non-null URL

SecurityException - if the caller does not have permission to connect to all of the URLs in codebase URL path

Since:

1.3

getClassAnnotation

public static String getClassAnnotation(Class cl)

Returns the class annotation (representing the location for a class) that RMI will use to annotate the call stream 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 class when marshalled

Since:

1.2

getSecurityContext

public static Object getSecurityContext(ClassLoader loader)

Deprecated. no replacement. As of the Java 2 platform v1.2, RMI no longer uses this method to obtain a class loader's security context.

Returns the security context of the given class loader.

Parameters:

loader - a class loader from which to get the security context

Returns:

the security context

Since:

JDK1.1

See Also:

SecurityManager.getSecurityContext()