- /*
- * @(#)Util.java 1.42 03/01/23
- *
- * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
- /*
- * Licensed Materials - Property of IBM
- * RMI-IIOP v1.0
- * Copyright IBM Corp. 1998 1999 All Rights Reserved
- *
- * US Government Users Restricted Rights - Use, duplication or
- * disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
- */
-
- package javax.rmi.CORBA;
-
- import java.rmi.RemoteException;
-
- import org.omg.CORBA.ORB;
- import org.omg.CORBA.SystemException;
- import org.omg.CORBA.Any;
- import org.omg.CORBA.portable.InputStream;
- import org.omg.CORBA.portable.OutputStream;
- import org.omg.CORBA.portable.ObjectImpl;
-
- import javax.rmi.CORBA.Tie;
- import java.rmi.Remote;
- import java.io.File;
- import java.io.FileInputStream;
-
- import java.security.AccessController;
- import java.security.PrivilegedAction;
- import sun.security.action.GetPropertyAction;
- import java.util.Properties;
-
- import com.sun.corba.se.internal.util.JDKBridge;
- /**
- * Provides utility methods that can be used by stubs and ties to
- * perform common operations.
- */
- public class Util {
-
- // This can only be set at static initialization time (no sync necessary).
- private static javax.rmi.CORBA.UtilDelegate utilDelegate = null;
- private static final String UtilClassKey = "javax.rmi.CORBA.UtilClass";
- private static final String defaultUtilImplName =
- "com.sun.corba.se.internal.POA.ShutdownUtilDelegate";
-
- static {
- utilDelegate = (javax.rmi.CORBA.UtilDelegate)
- createDelegateIfSpecified(UtilClassKey, defaultUtilImplName);
- }
-
- private Util(){}
-
- /**
- * Maps a SystemException to a RemoteException.
- * @param ex the SystemException to map.
- * @return the mapped exception.
- */
- public static RemoteException mapSystemException(SystemException ex) {
-
- if (utilDelegate != null) {
- return utilDelegate.mapSystemException(ex);
- }
- return null;
- }
-
- /**
- * Writes any java.lang.Object as a CORBA any.
- * @param out the stream in which to write the any.
- * @param obj the object to write as an any.
- */
- public static void writeAny(OutputStream out, Object obj) {
-
- if (utilDelegate != null) {
- utilDelegate.writeAny(out, obj);
- }
- }
-
- /**
- * Reads a java.lang.Object as a CORBA any.
- * @param in the stream from which to read the any.
- * @return the object read from the stream.
- */
- public static Object readAny(InputStream in) {
-
- if (utilDelegate != null) {
- return utilDelegate.readAny(in);
- }
- return null;
- }
-
- /**
- * Writes a java.lang.Object as a CORBA Object. If <code>obj</code> is
- * an exported RMI-IIOP server object, the tie is found
- * and wired to <code>obj</code>, then written to
- <code>out.write_Object(org.omg.CORBA.Object)</code>.
- * If <code>obj</code> is a CORBA Object, it is written to
- * <code>out.write_Object(org.omg.CORBA.Object)</code>.
- * @param out the stream in which to write the object.
- * @param obj the object to write.
- */
- public static void writeRemoteObject(OutputStream out,
- java.lang.Object obj) {
-
- if (utilDelegate != null) {
- utilDelegate.writeRemoteObject(out, obj);
- }
-
- }
-
- /**
- * Writes a java.lang.Object as either a value or a CORBA Object.
- * If <code>obj</code> is a value object or a stub object, it is written to
- * <code>out.write_abstract_interface(java.lang.Object)</code>. If <code>obj</code>
- is
- an exported
- * RMI-IIOP server object, the tie is found and wired to <code>obj</code>,
- * then written to <code>out.write_abstract_interface(java.lang.Object)</code>.
- * @param out the stream in which to write the object.
- * @param obj the object to write.
- */
- public static void writeAbstractObject(OutputStream out,
- java.lang.Object obj) {
-
- if (utilDelegate != null) {
- utilDelegate.writeAbstractObject(out, obj);
- }
- }
-
- /**
- * Registers a target for a tie. Adds the tie to an internal table and calls
- * {@link Tie#setTarget} on the tie object.
- * @param tie the tie to register.
- * @param target the target for the tie.
- */
- public static void registerTarget(javax.rmi.CORBA.Tie tie,
- java.rmi.Remote target) {
-
- if (utilDelegate != null) {
- utilDelegate.registerTarget(tie, target);
- }
-
- }
-
- /**
- * Removes the associated tie from an internal table and calls {@link
- Tie#deactivate}
- * to deactivate the object.
- * @param target the object to unexport.
- */
- public static void unexportObject(java.rmi.Remote target)
- throws java.rmi.NoSuchObjectException
- {
-
- if (utilDelegate != null) {
- utilDelegate.unexportObject(target);
- }
-
- }
-
- /**
- * Returns the tie (if any) for a given target object.
- * @return the tie or null if no tie is registered for the given target.
- */
- public static Tie getTie (Remote target) {
-
- if (utilDelegate != null) {
- return utilDelegate.getTie(target);
- }
- return null;
- }
-
-
- /**
- * Returns a singleton instance of a class that implements the
- * {@link ValueHandler} interface.
- * @return a class which implements the ValueHandler interface.
- */
- public static ValueHandler createValueHandler() {
-
- if (utilDelegate != null) {
- return utilDelegate.createValueHandler();
- }
- return null;
- }
-
- /**
- * Returns the codebase, if any, for the given class.
- * @param clz the class to get a codebase for.
- * @return a space-separated list of URLs, or null.
- */
- public static String getCodebase(java.lang.Class clz) {
- if (utilDelegate != null) {
- return utilDelegate.getCodebase(clz);
- }
- return null;
- }
-
- /**
- * Returns a class instance for the specified class.
- * <P>The spec for this method is the "Java to IDL language
- * mapping", ptc/00-01-06.
- * <P>In Java 2 Platform, this method works as follows:
- * <UL><LI>Find the first non-null <tt>ClassLoader</tt> on the
- * call stack and attempt to load the class using this
- * <tt>ClassLoader</tt>.
- * <LI>If the first step fails, and if <tt>remoteCodebase</tt>
- * is non-null and
- * <tt>useCodebaseOnly</tt> is false, then call
- * <tt>java.rmi.server.RMIClassLoader.loadClass(remoteCodebase, className)</tt>.
- * <LI>If <tt>remoteCodebase</tt> is null or <tt>useCodebaseOnly</tt>
- * is true, then call <tt>java.rmi.server.RMIClassLoader.loadClass(className)</tt>.
- * <LI>If a class was not successfully loaded by step 1, 2, or 3,
- * and <tt>loader</tt> is non-null, then call <tt>loader.loadClass(className)</tt>.
- * <LI>If a class was successfully loaded by step 1, 2, 3, or 4, then
- * return the loaded class, else throw <tt>ClassNotFoundException</tt>.
- * @param className the name of the class.
- * @param remoteCodebase a space-separated list of URLs at which
- * the class might be found. May be null.
- * @param loader a <tt>ClassLoader</tt> that may be used to
- * load the class if all other methods fail.
- * @return the <code>Class</code> object representing the loaded class.
- * @exception ClassNotFoundException if class cannot be loaded.
- */
- public static Class loadClass(String className,
- String remoteCodebase,
- ClassLoader loader)
- throws ClassNotFoundException {
- if (utilDelegate != null) {
- return utilDelegate.loadClass(className,remoteCodebase,loader);
- }
- return JDKBridge.loadClass(className, remoteCodebase, loader);
- }
-
-
- /**
- * The <tt>isLocal</tt> method has the same semantics as the
- * <tt>ObjectImpl._is_local</tt>
- * method, except that it can throw a <tt>RemoteException</tt>.
- *
- * The <tt>_is_local()</tt> 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.
- *
- * @param stub the stub to test.
- *
- * @return The <tt>_is_local()</tt> 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 <tt>_is_local()</tt>
- * method returns false otherwise. The default behavior of <tt>_is_local()</tt> is
- * to return false.
- *
- * @throws RemoteException The Java to IDL specification does not
- * specify the conditions that cause a <tt>RemoteException</tt> to be thrown.
- */
- public static boolean isLocal(Stub stub) throws RemoteException {
-
- if (utilDelegate != null) {
- return utilDelegate.isLocal(stub);
- }
-
- return false;
- }
-
- /**
- * Wraps an exception thrown by an implementation
- * method. It returns the corresponding client-side exception.
- * @param orig the exception to wrap.
- * @return the wrapped exception.
- */
- public static RemoteException wrapException(Throwable orig) {
-
- if (utilDelegate != null) {
- return utilDelegate.wrapException(orig);
- }
-
- return null;
- }
-
- /**
- * 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.
- * @param obj the objects to copy or connect.
- * @param orb the ORB.
- * @return the copied or connected objects.
- * @exception RemoteException if any object could not be copied or connected.
- */
- public static Object[] copyObjects (Object[] obj, ORB orb)
- throws RemoteException {
-
- if (utilDelegate != null) {
- return utilDelegate.copyObjects(obj, orb);
- }
-
- return null;
- }
-
- /**
- * Copies or connects an object. Used by local stubs to copy
- * an actual parameter, result object, or exception.
- * @param obj the object to copy.
- * @param orb the ORB.
- * @return the copy or connected object.
- * @exception RemoteException if the object could not be copied or connected.
- */
- public static Object copyObject (Object obj, ORB orb)
- throws RemoteException {
-
- if (utilDelegate != null) {
- return utilDelegate.copyObject(obj, orb);
- }
- return null;
- }
-
- // Same code as in PortableRemoteObject. Can not be shared because they
- // are in different packages and the visibility needs to be package for
- // security reasons. If you know a better solution how to share this code
- // then remove it from PortableRemoteObject. Also in Stub.java
- private static Object createDelegateIfSpecified(String classKey, String
- defaultClassName) {
- String className = (String)
- AccessController.doPrivileged(new GetPropertyAction(classKey));
- if (className == null) {
- Properties props = getORBPropertiesFile();
- if (props != null) {
- className = props.getProperty(classKey);
- }
- }
-
- if (className == null) {
- className = defaultClassName;
- }
-
- try {
- return Util.loadClass(className, null, null).newInstance();
- } catch (ClassNotFoundException ex) {
- throw new org.omg.CORBA.INITIALIZE(
- "cannot instantiate " + className);
- } catch (Exception ex) {
- throw new org.omg.CORBA.INITIALIZE(
- "cannot instantiate " + className);
- }
-
- }
-
-
- /**
- * Load the orb.properties file.
- */
- private static Properties getORBPropertiesFile () {
- return (Properties) AccessController.doPrivileged(new
- GetORBPropertiesFileAction());
- }
-
- }