```
public class Util
extends Object
```
Provides utility methods that can be used by stubs and ties to perform common operations.

Method Summary

Methods
Modifier and Type	Method and Description
`static Object`	`copyObject(Object obj, ORB orb)` Copies or connects an object.
`static Object[]`	`copyObjects(Object[] obj, ORB orb)` Copies or connects an array of objects.
`static ValueHandler`	`createValueHandler()` Returns a singleton instance of a class that implements the `ValueHandler` interface.
`static String`	`getCodebase(Class clz)` Returns the codebase, if any, for the given class.
`static Tie`	`getTie(Remote target)` Returns the tie (if any) for a given target object.
`static boolean`	`isLocal(Stub stub)` The `isLocal` method has the same semantics as the `ObjectImpl._is_local` method, except that it can throw a `RemoteException`.
`static Class`	`loadClass(String className, String remoteCodebase, ClassLoader loader)` Returns a class instance for the specified class.
`static RemoteException`	`mapSystemException(SystemException ex)` Maps a SystemException to a RemoteException.
`static Object`	`readAny(InputStream in)` Reads a java.lang.Object as a CORBA any.
`static void`	`registerTarget(Tie tie, Remote target)` Registers a target for a tie.
`static void`	`unexportObject(Remote target)` Removes the associated tie from an internal table and calls `Tie.deactivate()` to deactivate the object.
`static RemoteException`	`wrapException(Throwable orig)` Wraps an exception thrown by an implementation method.
`static void`	`writeAbstractObject(OutputStream out, Object obj)` Writes a java.lang.Object as either a value or a CORBA Object.
`static void`	`writeAny(OutputStream out, Object obj)` Writes any java.lang.Object as a CORBA any.
`static void`	`writeRemoteObject(OutputStream out, Object obj)` Writes a java.lang.Object as a CORBA Object.

Erste Seite von API Java Inhaltsverzeichnis Haut

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

- Method Detail
  - mapSystemException
```
public static RemoteException mapSystemException(SystemException ex)
```
    Maps a SystemException to a RemoteException.
    
    Parameters:
    ex - the SystemException to map.
    
    Returns:
    the mapped exception.
  - writeAny
```
public static void writeAny(OutputStream out,
            Object obj)
```
    Writes any java.lang.Object as a CORBA any.
    
    Parameters:
    out - the stream in which to write the any.
    obj - the object to write as an any.
  - readAny
```
public static Object readAny(InputStream in)
```
    Reads a java.lang.Object as a CORBA any.
    
    Parameters:
    in - the stream from which to read the any.
    
    Returns:
    the object read from the stream.
  - writeRemoteObject
```
public static void writeRemoteObject(OutputStream out,
                     Object obj)
```
    Writes a java.lang.Object as a CORBA Object. If obj is an exported RMI-IIOP server object, the tie is found and wired to obj, then written to out.write_Object(org.omg.CORBA.Object). If obj is a CORBA Object, it is written to out.write_Object(org.omg.CORBA.Object).
    
    Parameters:
    out - the stream in which to write the object.
    obj - the object to write.
  - writeAbstractObject
```
public static void writeAbstractObject(OutputStream out,
                       Object obj)
```
    Writes a java.lang.Object as either a value or a CORBA Object. If obj is a value object or a stub object, it is written to out.write_abstract_interface(java.lang.Object). If obj is an exported RMI-IIOP server object, the tie is found and wired to obj, then written to out.write_abstract_interface(java.lang.Object).
    
    Parameters:
    out - the stream in which to write the object.
    obj - the object to write.
  - registerTarget
```
public static void registerTarget(Tie tie,
                  Remote target)
```
    Registers a target for a tie. Adds the tie to an internal table and calls Tie.setTarget(java.rmi.Remote) on the tie object.
    
    Parameters:
    tie - the tie to register.
    target - the target for the tie.
  - unexportObject
```
public static void unexportObject(Remote target)
                           throws NoSuchObjectException
```
    Removes the associated tie from an internal table and calls Tie.deactivate() to deactivate the object.
    
    Parameters:
    target - the object to unexport.
    
    Throws:
    
    NoSuchObjectException
  - getTie
```
public static Tie getTie(Remote target)
```
    Returns the tie (if any) for a given target object.
    
    Returns:
    the tie or null if no tie is registered for the given target.
  - createValueHandler
```
public static ValueHandler createValueHandler()
```
    Returns a singleton instance of a class that implements the ValueHandler interface.
    
    Returns:
    a class which implements the ValueHandler interface.
  - getCodebase
```
public static String getCodebase(Class clz)
```
    Returns the codebase, if any, for the given class.
    
    Parameters:
    clz - the class to get a codebase for.
    
    Returns:
    a space-separated list of URLs, or null.
  - loadClass
```
public static Class loadClass(String className,
              String remoteCodebase,
              ClassLoader loader)
                       throws ClassNotFoundException
```
    Returns a class instance for the specified class.
    The spec for this method is the "Java to IDL language mapping", ptc/00-01-06.
    In Java SE Platform, this method works as follows:
    - Find the first non-null ClassLoader on the call stack and attempt to load the class using this ClassLoader.
    - If the first step fails, and if remoteCodebase is non-null and useCodebaseOnly is false, then call java.rmi.server.RMIClassLoader.loadClass(remoteCodebase, className).
    - If remoteCodebase is null or useCodebaseOnly is true, then call java.rmi.server.RMIClassLoader.loadClass(className).
    - If a class was not successfully loaded by step 1, 2, or 3, and loader is non-null, then call loader.loadClass(className).
    - If a class was successfully loaded by step 1, 2, 3, or 4, then return the loaded class, else throw ClassNotFoundException.
    Parameters:
    className - the name of the class.
    remoteCodebase - a space-separated list of URLs at which the class might be found. May be null.
    loader - a ClassLoader that may be used to load the class if all other methods fail.
    
    Returns:
    the Class object representing the loaded class.
    
    Throws:
    
    ClassNotFoundException - if class cannot be loaded.
  - isLocal
```
public static boolean isLocal(Stub stub)
                       throws RemoteException
```
    The isLocal method has the same semantics as the ObjectImpl._is_local method, except that it can throw a RemoteException. The _is_local() method is provided so that stubs may determine if a particular object is implemented by a local servant and hence local invocation APIs may be used.
    
    Parameters:
    stub - the stub to test.
    
    Returns:
    The _is_local() method returns true if the servant incarnating the object is located in the same process as the stub and they both share the same ORB instance. The _is_local() method returns false otherwise. The default behavior of _is_local() is to return false.
    
    Throws:
    
    RemoteException - The Java to IDL specification does not specify the conditions that cause a RemoteException to be thrown.
  - wrapException
```
public static RemoteException wrapException(Throwable orig)
```
    Wraps an exception thrown by an implementation method. It returns the corresponding client-side exception.
    
    Parameters:
    orig - the exception to wrap.
    
    Returns:
    the wrapped exception.
  - copyObjects
```
public static Object[] copyObjects(Object[] obj,
                   ORB orb)
                            throws RemoteException
```
    Copies or connects an array of objects. Used by local stubs to copy any number of actual parameters, preserving sharing across parameters as necessary to support RMI semantics.
    
    Parameters:
    obj - the objects to copy or connect.
    orb - the ORB.
    
    Returns:
    the copied or connected objects.
    
    Throws:
    
    RemoteException - if any object could not be copied or connected.
  - copyObject
```
public static Object copyObject(Object obj,
                ORB orb)
                         throws RemoteException
```
    Copies or connects an object. Used by local stubs to copy an actual parameter, result object, or exception.
    
    Parameters:
    obj - the object to copy.
    orb - the ORB.
    
    Returns:
    the copy or connected object.
    
    Throws:
    
    RemoteException - if the object could not be copied or connected.

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Vielen Dank im Voraus.

Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-javax/rmi/corba/util.html

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Referenzen

Manuel PHP : https://docs.oracle.com

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Inhaltsverzeichnis Haut

Class Util

Method Summary

Methods inherited from class java.lang.Object

Method Detail

mapSystemException

writeAny

readAny

writeRemoteObject

writeAbstractObject

registerTarget

unexportObject

getTie

createValueHandler

getCodebase

loadClass

isLocal

wrapException

copyObjects

copyObject

Referenzen