2003-10-09 Michael Koch <konqueror@gmx.de>

	* java/rmi/server/RMIClassLoader.java:
	Removed unused imports, little reformatings.
	(getClassLoader): New method, implementation was part of old loadCLass
	method.
	(loadClass): Simplified by moving functionality to new method and
	reworking the code a bit.
	(getClassAnnotation): Merged documentation from classpath.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@72267 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 95 insertions, 59 deletions

diff --git a/libjava/java/rmi/server/RMIClassLoader.java b/libjava/java/rmi/server/RMIClassLoader.java
index 20dd7f6384b..c6187983eb1 100644
--- a/libjava/java/rmi/server/RMIClassLoader.java
+++ b/libjava/java/rmi/server/RMIClassLoader.java
@@ -40,17 +40,11 @@ package java.rmi.server;
 
 import java.net.MalformedURLException;
 import java.net.URL;
-import java.net.URLConnection;
 import java.net.URLClassLoader;
-import java.io.IOException;
-import java.io.DataInputStream;
 import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
 import java.util.Hashtable;
 import java.util.Map;
 import java.util.StringTokenizer;
-import java.util.WeakHashMap;
 
 
 /**
@@ -106,6 +100,7 @@ public class RMIClassLoader
   //defaultAnnotation is got from system property
   // "java.rmi.server.defaultAnnotation"
   private static String defaultAnnotation;
+
   //URL object for defaultAnnotation
   private static URL defaultCodebase;
 
@@ -121,19 +116,19 @@ public class RMIClassLoader
     defaultAnnotation = System.getProperty ("java.rmi.server.defaultAnnotation");
 
     try
-    {
-      if (defaultAnnotation != null)
-        defaultCodebase = new URL (defaultAnnotation);
-    }
+      {
+        if (defaultAnnotation != null)
+          defaultCodebase = new URL (defaultAnnotation);
+      }
     catch (Exception _)
-    {
-      defaultCodebase = null;
-    }
+      {
+        defaultCodebase = null;
+      }
 
     if (defaultCodebase != null)
       {
-        defaultLoader = new MyClassLoader(new URL[]{ defaultCodebase },
-					  null, defaultAnnotation);
+        defaultLoader = new MyClassLoader (new URL[] { defaultCodebase }, null,
+                                           defaultAnnotation);
         cacheLoaders.put(defaultAnnotation, defaultLoader);
       }
     }
@@ -150,49 +145,87 @@ public class RMIClassLoader
   public static Class loadClass (String codebases, String name)
     throws MalformedURLException, ClassNotFoundException
   {
-    Class c = null;
     ClassLoader loader = Thread.currentThread().getContextClassLoader();
 
     //try context class loader first
     try 
       {
-	    c = loader.loadClass(name);       
+        return loader.loadClass (name);
+      }
+    catch (ClassNotFoundException e)
+      {
+        // class not found in the local classpath
       }
-    catch(ClassNotFoundException e) {}
-
-    if (c != null)
-      return c;
 
     if (codebases.length() == 0) //==""
-      loader = defaultLoader;
-    else 
       {
-	loader = (ClassLoader)cacheLoaders.get(codebases);
-	if (loader == null)
-	  {
-	    //create an entry in cacheLoaders mapping a loader to codebases.
-            
-	    // codebases are separated by " "
-	    StringTokenizer tok = new StringTokenizer(codebases, " "); 
-	    ArrayList urls = new ArrayList();
-	    while (tok.hasMoreTokens())
-	      urls.add(new URL(tok.nextToken()));
-  
-	    loader = new MyClassLoader((URL[])urls.toArray(new URL[urls.size()]),
-					null, codebases);
-	    cacheLoaders.put(codebases, loader);
-	  }
+        loader = defaultLoader;
+      }
+    else
+      {
+        loader = getClassLoader(codebases);
+      }
+
+    if (loader == null)
+      {
+        //do not throw NullPointerException
+        throw new ClassNotFoundException ("Could not find class (" + name +
+                                          ") at codebase (" + codebases + ")");
       }
+      
+    return loader.loadClass (name);
+  }
 
-    return loader.loadClass(name);
+  /**
+   * Gets a classloader for the given codebase and with the current
+   * context classloader as parent.
+   * 
+   * @param codebases
+   * 
+   * @return a classloader for the given codebase
+   * 
+   * @throws MalformedURLException if the codebase contains a malformed URL
+   */
+  private static ClassLoader getClassLoader (String codebases) 
+    throws MalformedURLException
+  {
+    ClassLoader loader = (ClassLoader) cacheLoaders.get (codebases);
+	
+    if (loader == null)
+      {
+        //create an entry in cacheLoaders mapping a loader to codebases.
+        // codebases are separated by " "
+        StringTokenizer tok = new StringTokenizer (codebases, " ");
+        ArrayList urls = new ArrayList();
+      
+        while (tok.hasMoreTokens())
+          urls.add (new URL (tok.nextToken()));
+      
+        loader = new MyClassLoader ((URL[]) urls.toArray (new URL [urls.size()]),
+    				    null, codebases);
+        cacheLoaders.put (codebases, loader);
+      }
+           
+    return loader;
   }
-  
-  public static String getClassAnnotation(Class cl)
+ 
+  /**
+   * Returns a string representation of the network location where a remote
+   * endpoint can get the class-definition of the given class.
+   *
+   * @param cl
+   *
+   * @return a space seperated list of URLs where the class-definition
+   * of cl may be found
+   */
+  public static String getClassAnnotation (Class cl)
   {
     ClassLoader loader = cl.getClassLoader();
-    if (loader == null || loader == ClassLoader.getSystemClassLoader())
+    
+    if (loader == null
+        || loader == ClassLoader.getSystemClassLoader())
       {
-	return null; //??
+        return System.getProperty ("java.rmi.server.codebase");
       }
 
     if (loader instanceof MyClassLoader)
@@ -203,26 +236,29 @@ public class RMIClassLoader
     String s = (String) cacheAnnotations.get (loader);
 
     if (s != null)
-      {
-        return s;
-      }
+      return s;
 
     if (loader instanceof URLClassLoader)
       {
-	URL[] urls = ((URLClassLoader)loader).getURLs();
-	if(urls.length == 0)
-	  return null;
-
-	StringBuffer annotation = new StringBuffer(64*urls.length);
-	for(int i = 0; i < urls.length; i++)
-	  {
-	    annotation.append(urls[i].toExternalForm());
-	    annotation.append(' ');
-	  }
-	s = annotation.toString();
-	cacheAnnotations.put(loader, s);
+        URL[] urls = ((URLClassLoader) loader).getURLs();
+
+        if (urls.length == 0)
+          return null;
+
+        StringBuffer annotation = new StringBuffer (64 * urls.length);
+
+        for (int i = 0; i < urls.length; i++)
+          {
+            annotation.append (urls [i].toExternalForm());
+            annotation.append (' ');
+          }
+
+        s = annotation.toString();
+        cacheAnnotations.put (loader, s);
+        return s;
       }
-    return null;
+
+    return System.getProperty ("java.rmi.server.codebase");
   }
 
   /**