Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102074 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 398 insertions, 0 deletions

diff --git a/libjava/classpath/javax/naming/spi/NamingManager.java b/libjava/classpath/javax/naming/spi/NamingManager.java
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+/* NamingManager.java --
+   Copyright (C) 2000, 2001, 2002, 2003, 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.naming.spi;
+
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.StringTokenizer;
+
+import javax.naming.CannotProceedException;
+import javax.naming.Context;
+import javax.naming.Name;
+import javax.naming.NamingException;
+import javax.naming.NoInitialContextException;
+import javax.naming.RefAddr;
+import javax.naming.Reference;
+import javax.naming.Referenceable;
+import javax.naming.StringRefAddr;
+
+public class NamingManager
+{
+  public static final String CPE = "java.naming.spi.CannotProceedException";
+
+  private static InitialContextFactoryBuilder icfb;
+
+  // Package private so DirectoryManager can access it.
+  static ObjectFactoryBuilder ofb;
+
+  // This class cannot be instantiated.
+  NamingManager ()
+  {
+  }
+
+  public static boolean hasInitialContextFactoryBuilder ()
+  {
+    return icfb != null;
+  }
+  
+  public static Context getInitialContext (Hashtable environment)
+    throws NamingException
+  {
+    InitialContextFactory icf = null;
+    
+    if (icfb != null)
+      icf = icfb.createInitialContextFactory(environment);
+    else
+      {	 
+	String java_naming_factory_initial = null;
+	if (environment != null)
+	  java_naming_factory_initial
+	    = (String) environment.get (Context.INITIAL_CONTEXT_FACTORY);
+	if (java_naming_factory_initial == null)
+	  java_naming_factory_initial =
+	    System.getProperty (Context.INITIAL_CONTEXT_FACTORY);
+	if (java_naming_factory_initial == null)
+	  throw new
+	    NoInitialContextException ("Can't find property: "
+				       + Context.INITIAL_CONTEXT_FACTORY);
+
+	try
+	  {
+	    icf = (InitialContextFactory)Class.forName
+		(java_naming_factory_initial, true,
+		 Thread.currentThread().getContextClassLoader())
+		.newInstance ();
+	  }
+	catch (Exception exception)
+	  {
+	    NoInitialContextException e
+	      = new NoInitialContextException
+	      ("Can't load InitialContextFactory class: "
+	       + java_naming_factory_initial);
+	    e.setRootCause(exception);
+	    throw e;
+	  }
+      }
+
+    return icf.getInitialContext (environment);
+  }
+
+  static Context getURLContext (Object refInfo,
+				Name name,
+				Context nameCtx,
+				String scheme,
+				Hashtable environment) 
+    throws NamingException
+  {
+    String prefixes = null;
+    if (environment != null)
+      prefixes = (String) environment.get (Context.URL_PKG_PREFIXES);
+    if (prefixes == null)
+      prefixes = System.getProperty (Context.URL_PKG_PREFIXES);
+    if (prefixes == null)
+      {
+	// Specified as the default in the docs.  Unclear if this is
+	// right for us.
+	prefixes = "com.sun.jndi.url";
+      }
+
+    scheme = scheme + "." + scheme + "URLContextFactory";
+
+    StringTokenizer tokens = new StringTokenizer (prefixes, ":");
+    while (tokens.hasMoreTokens ())
+      {
+	String aTry = tokens.nextToken ();
+	try
+	  {
+	    Class factoryClass = Class.forName (aTry + "." + scheme,
+						true,
+						Thread.currentThread().getContextClassLoader());
+	    ObjectFactory factory =
+	      (ObjectFactory) factoryClass.newInstance ();
+	    Object obj = factory.getObjectInstance (refInfo, name,
+						    nameCtx, environment);
+	    Context ctx = (Context) obj;
+	    if (ctx != null)
+	      return ctx;
+	  }
+	catch (ClassNotFoundException _1)
+	  {
+	    // Ignore it.
+	  }
+	catch (ClassCastException _2)
+	  {
+	    // This means that the class we found was not an
+	    // ObjectFactory or that the factory returned something
+	    // which was not a Context.
+	  }
+	catch (InstantiationException _3)
+	  {
+	    // If we couldn't instantiate the factory we might get
+	    // this.
+	  }
+	catch (IllegalAccessException _4)
+	  {
+	    // Another possibility when instantiating.
+	  }
+	catch (NamingException _5)
+	  {
+	    throw _5;
+	  }
+	catch (Exception _6)
+	  {
+	    // Anything from getObjectInstance.
+	  }
+      }
+
+    return null;
+  }
+
+  public static Context getURLContext (String scheme,
+				       Hashtable environment) 
+       throws NamingException
+  {
+    return getURLContext (null, null, null, scheme, environment);
+  }
+
+  public static void setObjectFactoryBuilder (ObjectFactoryBuilder builder)
+    throws NamingException
+  {
+    SecurityManager sm = System.getSecurityManager ();
+    if (sm != null)
+      sm.checkSetFactory ();
+    // Once the builder is installed it cannot be replaced.
+    if (ofb != null)
+      throw new IllegalStateException ("builder already installed");
+    if (builder != null)
+      ofb = builder;
+  }
+
+  static StringTokenizer getPlusPath (String property, Hashtable env,
+				      Context nameCtx)
+    throws NamingException
+  {
+    String path = (String) env.get (property);
+    if (nameCtx == null)
+      nameCtx = getInitialContext (env);
+    String path2 = (String) nameCtx.getEnvironment ().get (property);
+    if (path == null)
+      path = path2;
+    else if (path2 != null)
+      path += ":" + path2;
+    return new StringTokenizer (path != null ? path : "", ":");
+  }
+
+  public static Object getObjectInstance (Object refInfo,
+					  Name name,
+					  Context nameCtx,
+					  Hashtable environment)
+    throws Exception
+  {
+    ObjectFactory factory = null;
+
+    if (ofb != null)
+      factory = ofb.createObjectFactory (refInfo, environment);
+    else
+      {
+	// First see if we have a Reference or a Referenceable.  If so
+	// we do some special processing.
+	Object ref2 = refInfo;
+	if (refInfo instanceof Referenceable)
+	  ref2 = ((Referenceable) refInfo).getReference ();
+	if (ref2 instanceof Reference)
+	  {
+	    Reference ref = (Reference) ref2;
+
+	    // If we have a factory class name then we use that.
+	    String fClass = ref.getFactoryClassName ();
+	    if (fClass != null)
+	      {
+		// Exceptions here are passed to the caller.
+		Class k = Class.forName (fClass,
+					 true,
+					 Thread.currentThread().getContextClassLoader());
+		factory = (ObjectFactory) k.newInstance ();
+	      }
+	    else
+	      {
+		// There's no factory class name.  If the address is a
+		// StringRefAddr with address type `URL', then we try
+		// the URL's context factory.
+		Enumeration e = ref.getAll ();
+		while (e.hasMoreElements ())
+		  {
+		    RefAddr ra = (RefAddr) e.nextElement ();
+		    if (ra instanceof StringRefAddr
+			&& "URL".equals (ra.getType ()))
+		      {
+			factory
+			  = (ObjectFactory) getURLContext (refInfo,
+							   name,
+							   nameCtx,
+							   (String) ra.getContent (),
+							   environment);
+			Object obj = factory.getObjectInstance (refInfo,
+								name,
+								nameCtx,
+								environment);
+			if (obj != null)
+			  return obj;
+		      }
+		  }
+
+		// Have to try the next step.
+		factory = null;
+	      }
+	  }
+
+	// Now look at OBJECT_FACTORIES to find the factory.
+	if (factory == null)
+	  {
+	    StringTokenizer tokens = getPlusPath (Context.OBJECT_FACTORIES,
+						  environment, nameCtx);
+
+	    while (tokens.hasMoreTokens ())
+	      {
+		String klassName = tokens.nextToken ();
+		Class k = Class.forName (klassName,
+					 true,
+					 Thread.currentThread().getContextClassLoader());
+		factory = (ObjectFactory) k.newInstance ();
+		Object obj = factory.getObjectInstance (refInfo, name,
+							nameCtx, environment);
+		if (obj != null)
+		  return obj;
+	      }
+
+	    // Failure.
+	    return refInfo;
+	  }
+      }
+
+    if (factory == null)
+      return refInfo;
+    Object obj = factory.getObjectInstance (refInfo, name,
+					    nameCtx, environment);
+    return obj == null ? refInfo : obj;
+  }
+
+  public static void setInitialContextFactoryBuilder (InitialContextFactoryBuilder builder)
+    throws NamingException
+  {
+    SecurityManager sm = System.getSecurityManager ();
+    if (sm != null)
+      sm.checkSetFactory ();
+    // Once the builder is installed it cannot be replaced.
+    if (icfb != null)
+      throw new IllegalStateException ("builder already installed");
+    if (builder != null)
+      icfb = builder;
+  }
+
+  public static Context getContinuationContext (CannotProceedException cpe)
+    throws NamingException
+  {
+    Hashtable env = cpe.getEnvironment ();
+    if (env != null)
+      env.put (CPE, cpe);
+
+    // It is really unclear to me if this is right.
+    try
+      {
+	Object obj = getObjectInstance (cpe.getResolvedObj(),
+					cpe.getAltName (),
+					cpe.getAltNameCtx (), 
+					env);
+	if (obj != null)
+	  return (Context) obj;
+      }
+    catch (Exception _)
+      {
+      }
+
+    // fix stack trace for re-thrown exception (message confusing otherwise)
+    cpe.fillInStackTrace();
+
+    throw cpe;
+  }
+
+  public static Object getStateToBind (Object obj, Name name,
+				       Context nameCtx, Hashtable environment)
+    throws NamingException
+  {
+    StringTokenizer tokens = getPlusPath (Context.STATE_FACTORIES,
+					  environment, nameCtx);
+    while (tokens.hasMoreTokens ())
+      {
+	String klassName = tokens.nextToken ();
+	try
+	  {
+	    Class k = Class.forName (klassName,
+				     true,
+				     Thread.currentThread().getContextClassLoader());
+	    StateFactory factory = (StateFactory) k.newInstance ();
+	    Object o = factory.getStateToBind (obj, name, nameCtx,
+					       environment);
+	    if (o != null)
+	      return o;
+	  }
+	catch (ClassNotFoundException _1)
+	  {
+	    // Ignore it.
+	  }
+	catch (ClassCastException _2)
+	  {
+	    // This means that the class we found was not an
+	    // ObjectFactory or that the factory returned something
+	    // which was not a Context.
+	  }
+	catch (InstantiationException _3)
+	  {
+	    // If we couldn't instantiate the factory we might get
+	    // this.
+	  }
+	catch (IllegalAccessException _4)
+	  {
+	    // Another possibility when instantiating.
+	  }
+      }
+
+    return obj;
+  }
+}