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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class RMIClassLoader - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.rmi.server
Class RMIClassLoader

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

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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

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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 Object	getSecurityContext(ClassLoader loader)           Deprecated. no replacement. As of JDK1.2, RMI no longer uses this method to obtain a classloader's security context.
static Class	loadClass(String name)           Deprecated. replaced by loadClass(String,String) method
static Class	loadClass(String codebase, String name)           Load a class from a codebase URL path.
static Class	loadClass(URL codebase, String name)           Load 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

Load 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)

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loadClass

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

Load a class from a codebase URL.

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 URL

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

Since:

JDK1.1

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loadClass

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

Load a class from a codebase URL path.

Parameters:

codebase - the list of 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 URL

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

Since:

JDK1.2

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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:

JDK1.2

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getSecurityContext

public static Object getSecurityContext(ClassLoader loader)

Deprecated. no replacement. As of JDK1.2, RMI no longer uses this method to obtain a classloader's security context.

Return 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()

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