prims.cc (_Jv_NewObjectArray): Undo placement change.

2000-11-25  Anthony Green  <green@redhat.com>

	* prims.cc (_Jv_NewObjectArray): Undo placement change.
	(_Jv_NewPrimArray): Likewise.
	* gcj/array.h (__JArray): Undo const change.  Removed constructor.
	(class JArray): Removed constructor.

	* java/lang/Thread.java (context_class_loader): New private data.
	(getContextClassLoader): New method.
	(setContextClassLoader): New method.
	(Thread): Initialize context_class_loader.

	* java/net/URLClassLoader.java: Import java.util.Enumeration.
	(getResource): Rename to findResource.
	(findResource): New method.  Used to be getResource.
	(getResourceAsStream): Deleted.
	(jarFileize): Extracted logic from URLClassLoader constructor into
	this new private method.
	(addURL): New protected method.
	(URLClassLoader): Call jarFileize.  Use addElement instead of
	insertElementAt.
	(findResources): New method.

	* java/lang/ClassLoader.java: Import java.util.Enumeration.
	(getResource): Implement correct logic.
	(findResource): New method.
	(getResources): New method.
	(findClass): Create a ClassNotFoundException with the name of the
	class rather than nothing at all.
	(defineClass) Only throw ClassFormatError.

	* java/lang/Class.java (forName): New method.
	* java/lang/Class.h (forName): New method.
	* java/lang/natClass.cc (forName): New method.

From-SVN: r37751

libjava/gcj/array.h

@@ -17,21 +17,9 @@ extern "Java" {
 
 class __JArray : public java::lang::Object
 {
-protected:
-  // FIXME: this is a hack to work around a bug in the g++ Java
-  // support.  If we add a constructor with a jsize argument to
-  // JArray<T>, then g++ complains.
-  __JArray () : length (0)
-  {
-  }
 public:
-  const jsize length;
+  jsize length;
   friend jsize JvGetArrayLength (__JArray*);
-
-  // This probably shouldn't be public.
-  __JArray (jsize l) : length (l)
-  {
-  }
 };
 
 template<class T>

libjava/java/lang/Class.h

@@ -103,6 +103,7 @@ struct _Jv_ifaces
 class java::lang::Class : public java::lang::Object
 {
 public:
+  static jclass forName (jstring className, java::lang::ClassLoader *loader);
   static jclass forName (jstring className);
   JArray<jclass> *getClasses (void);
 

libjava/java/lang/Class.java

@@ -30,6 +30,8 @@ public final class Class implements Serializable
 {
   public static native Class forName (String className)
     throws ClassNotFoundException;
+  public static native Class forName (String className, ClassLoader loader)
+    throws ClassNotFoundException;
   public native Class[] getClasses ();
   public native ClassLoader getClassLoader ();
   public native Class getComponentType ();

libjava/java/lang/ClassLoader.java

@@ -11,8 +11,10 @@ details.  */
 package java.lang;
 
 import java.io.InputStream;
+import java.io.IOException;
 import java.net.URL;
 import java.net.URLConnection;
+import java.util.Enumeration;
 import java.util.Stack;
 
 /**
@@ -132,7 +134,7 @@ public abstract class ClassLoader {
   protected Class findClass (String name)
     throws ClassNotFoundException
   {
-    throw new ClassNotFoundException ();
+    throw new ClassNotFoundException (name);
   }
 
   /** 
@@ -154,7 +156,7 @@ public abstract class ClassLoader {
    * @exception java.lang.LinkageError
    * @see ClassLoader#defineClass(String,byte[],int,int) */
   protected final Class defineClass(byte[] data, int off, int len) 
-    throws java.lang.ClassNotFoundException, java.lang.LinkageError
+    throws ClassFormatError
   {
     return defineClass (null, data, off, len);
   }
@@ -188,7 +190,7 @@ public abstract class ClassLoader {
 						 byte[] data,
 						 int off,
 						 int len)
-    throws java.lang.ClassNotFoundException, java.lang.LinkageError
+    throws ClassFormatError
   {
     if (data==null || data.length < off+len || off<0 || len<0)
       throw new ClassFormatError ("arguments to defineClass "
@@ -207,10 +209,7 @@ public abstract class ClassLoader {
 
       return defineClass0 (name, data, off, len);
 
-    } catch (java.lang.LinkageError x) {
-      throw x;		// rethrow
-
-    } catch (java.lang.ClassNotFoundException x) {
+    } catch (ClassFormatError x) {
       throw x;		// rethrow
 
     } catch (java.lang.VirtualMachineError x) {
@@ -223,7 +222,7 @@ public abstract class ClassLoader {
 			       + "while defining class "
 			       + name + ": " 
 			       + x.toString ());
-     }
+    }
   }
 
   /** This is the entry point of defineClass into the native code */
@@ -231,7 +230,7 @@ public abstract class ClassLoader {
 				     byte[] data,
 				     int off,
 				     int len)
-    throws java.lang.ClassNotFoundException, java.lang.LinkageError;
+    throws ClassFormatError;
 
 
   /** 
@@ -356,8 +355,8 @@ public abstract class ClassLoader {
       if (res == null) return null;
       return res.openStream ();
     } catch (java.io.IOException x) {
-       return null;
-     }
+      return null;
+    }
   }
  
   /**
@@ -369,9 +368,62 @@ public abstract class ClassLoader {
    * @see     java.lang.ClassLoader#getResourceAsStream(String)
    * @see     java.io.URL
    */
-  public URL getResource(String name) {
+  public URL getResource (String name) 
+  {
+    // The rules say search the parent class if non-null,
+    // otherwise search the built-in class loader (assumed to be
+    // the system ClassLoader).  If not found, call
+    // findResource().
+    URL result = null;
+
+    ClassLoader delegate = parent;
+
+    if (delegate == null)
+      delegate = getSystemClassLoader ();
+	
+    // Protect ourselves from looping.
+    if (this != delegate)
+      result = delegate.getResource (name);
+
+    if (result != null)
+      return result;
+    else
+      return findResource (name);
+  }
+
+  protected URL findResource (String name)
+  {
+    // Default to returning null.  Derived classes implement this.
     return null;
   }
 
+  public Enumeration getResources (String name) throws IOException
+  {
+    // The rules say search the parent class if non-null,
+    // otherwise search the built-in class loader (assumed to be
+    // the system ClassLoader).  If not found, call
+    // findResource().
+    Enumeration result = null;
+
+    ClassLoader delegate = parent;
+
+    if (delegate == null)
+      delegate = getSystemClassLoader ();
+	
+    // Protect ourselves from looping.
+    if (this != delegate)
+      result = delegate.getResources (name);
+
+    if (result != null)
+      return result;
+    else
+      return findResources (name);
+  }
+
+  protected Enumeration findResources (String name) throws IOException
+  {
+    // Default to returning null.  Derived classes implement this.
+    return null;
+  }
 }
 

libjava/java/lang/Thread.java

@@ -145,15 +145,23 @@ public class Thread implements Runnable
     daemon_flag = status;
   }
 
-  // TODO12:
-  // public ClassLoader getContextClassLoader()
-  // {
-  // }
+  public ClassLoader getContextClassLoader()
+  {
+    if (context_class_loader == null)
+      {
+	context_class_loader = ClassLoader.getSystemClassLoader ();
+	return context_class_loader;
+      }
+
+    // FIXME: Add security manager stuff here.
+    return context_class_loader;
+  }
 
-  // TODO12:
-  // public void setContextClassLoader(ClassLoader cl)
-  // {
-  // }
+  public void setContextClassLoader(ClassLoader cl)
+  {
+    // FIXME: Add security manager stuff here.
+    context_class_loader = cl;
+  }
 
   public final void setName (String n)
   {
@@ -227,13 +235,14 @@ public class Thread implements Runnable
     interrupt_flag = false;
     alive_flag = false;
     startable_flag = true;
-    
+
     if (current != null)
       {
 	daemon_flag = current.isDaemon();
         int gmax = group.getMaxPriority();
 	int pri = current.getPriority();
 	priority = (gmax < pri ? gmax : pri);
+	context_class_loader = current.context_class_loader;
       }
     else
       {
@@ -277,7 +286,7 @@ public class Thread implements Runnable
   public String toString ()
   {
     return "Thread[" + name + "," + priority + "," + 
-	   (group == null ? "" : group.getName()) + "]";
+      (group == null ? "" : group.getName()) + "]";
   }
 
   public static native void yield ();
@@ -291,6 +300,7 @@ public class Thread implements Runnable
   boolean interrupt_flag;
   private boolean alive_flag;
   private boolean startable_flag;
+  private ClassLoader context_class_loader;
 
   // Our native data.
   private Object data;

libjava/java/lang/natClass.cc

@@ -72,7 +72,7 @@ static _Jv_Utf8Const *finit_leg_name = _Jv_makeUtf8Const ("$finit$", 7);
 
 
 jclass
-java::lang::Class::forName (jstring className)
+java::lang::Class::forName (jstring className, java::lang::ClassLoader *loader)
 {
   if (! className)
     JvThrow (new java::lang::NullPointerException);
@@ -85,10 +85,10 @@ java::lang::Class::forName (jstring className)
   // IllegalArgumentException on failure.
   _Jv_Utf8Const *name = _Jv_makeUtf8Const (buffer, length);
 
-  // FIXME: should use class loader from calling method.
+  // FIXME: should use bootstrap class loader if loader is null.
   jclass klass = (buffer[0] == '[' 
-		  ? _Jv_FindClassFromSignature (name->data, NULL)
-		  : _Jv_FindClass (name, NULL));
+		  ? _Jv_FindClassFromSignature (name->data, loader)
+		  : _Jv_FindClass (name, loader));
 
   if (klass)
     _Jv_InitClass (klass);
@@ -98,6 +98,13 @@ java::lang::Class::forName (jstring className)
   return klass;
 }
 
+jclass
+java::lang::Class::forName (jstring className)
+{
+  // FIXME: should use class loader from calling method.
+  return forName (className, NULL);
+}
+
 java::lang::reflect::Constructor *
 java::lang::Class::getConstructor (JArray<jclass> *param_types)
 {
@@ -608,7 +615,7 @@ java::lang::Class::getMethods (void)
   return result;
 }
 
-jboolean
+inline jboolean
 java::lang::Class::isAssignableFrom (jclass klass)
 {
   // Arguments may not have been initialized, given ".class" syntax.
@@ -899,7 +906,7 @@ _Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface, int method_idx)
   return cldt->cls.itable[idx];
 }
 
-inline jboolean
+jboolean
 _Jv_IsAssignableFrom (jclass target, jclass source)
 {
   if (target == &ObjectClass 

libjava/java/net/URLClassLoader.java

@@ -10,6 +10,7 @@ package java.net;
 
 import java.io.*;
 import java.util.jar.*;
+import java.util.Enumeration;
 import java.util.Vector;
 
 public class URLClassLoader extends ClassLoader 
@@ -42,6 +43,56 @@ public class URLClassLoader extends ClassLoader
     this (urls, parent, null);
   }
 
+  // A File URL may actually be a Jar URL.  Convert if possible.
+  private URL jarFileize (URL url)
+  {
+    if (! url.getProtocol ().equals ("jar"))
+      {
+	String f = url.getFile ();
+
+	// If it ends with '/' we'll take it for a directory,
+	// otherwise it's a jar file.  This is how JDK 1.2 defines
+	// it, so we will not try to be smart here.
+	if (f.charAt (f.length ()-1) != '/')
+	  {
+	    try
+	      {
+		url = new URL ("jar", "", -1, (url.toExternalForm ())+"!/", 
+			       getHandler0 ("jar"));
+	      } 
+	    catch (MalformedURLException x)
+	      {
+		/* ignore */
+	      }
+	  }
+      }
+    return url;
+  }
+
+  protected void addURL (URL url)
+  {
+    JarURLConnection conn = null;
+    
+    // Convert a Jar File URL into Jar URL if possible.
+    url = jarFileize (url);
+
+    path.addElement (url);
+
+    if (url.getProtocol ().equals ("jar"))
+      {
+	try
+	  {
+	    conn = (JarURLConnection) url.openConnection ();
+	  }
+	catch (java.io.IOException x)
+	  {
+	    /* ignore */
+	  }
+      }
+
+    info.addElement (conn);
+  }
+
   public URLClassLoader (URL[] urls, ClassLoader parent,
 			 URLStreamHandlerFactory fac)
   { 
@@ -61,31 +112,10 @@ public class URLClassLoader extends ClassLoader
 
     for (int i = 0; i < urls.length; i++)
       {
-	URL u = urls[i];
+	// Convert a Jar File URL into a Jar URL is possible. 
+	URL u = jarFileize(urls[i]);
 
-	// If it is a jar url, then we'll search it as is.  
-	if (! u.getProtocol ().equals ("jar"))
-	  {
-	    String f = u.getFile ();
-
-	    // If it ends with '/' we'll take it for a directory,
-	    // otherwise it's a jar file.  This is how JDK 1.2 defines
-	    // it, so we will not try to be smart here.
-	    if (f.charAt (f.length ()-1) != '/')
-	      {
-		try
-		  {
-		    u = new URL ("jar", "", -1, (u.toExternalForm ())+"!/", 
-				 getHandler0 ("jar"));
-		  } 
-		catch (MalformedURLException x)
-		  {
-		    /* ignore */
-		  }
-	      }
-	  }
-
-	path.insertElementAt (u, i);
+	path.addElement (u);
 
 	if (u.getProtocol ().equals ("jar"))
 	  {
@@ -98,75 +128,83 @@ public class URLClassLoader extends ClassLoader
 	      {
 		/* ignore */
 	      }
-	    info.insertElementAt (conn, i);
+	    info.addElement (conn);
 	  }
 	else
 	  {
-	    info.insertElementAt (null, i);
+	    info.addElement (null);
 	  }
       }
   }
+
+  public URL[] getURLs ()
+  {
+    URL[] urls = new URL[path.size()];
+    path.copyInto (urls);
+    return urls;
+  }
   
-  public URL getResource (String name)
+  public Enumeration findResources (String name)
   {
+    Vector results = new Vector ();
+
     for (int i = 0; i < path.size(); i++)
       {
-	URL u    = (URL)path.elementAt (i);
-	
+	URL u = (URL)path.elementAt (i);
+		
 	try {
 	  JarURLConnection conn = (JarURLConnection) info.elementAt (i);
- 	  
+	  
 	  if (conn != null)
 	    {
 	      if (conn.getJarFile().getJarEntry (name) != null)
-		return new URL(u, name, getHandler0 (u.getProtocol()));
+		results.addElement (new URL(u, name, getHandler0 (u.getProtocol())));
 	    }
 	  else
 	    {
 	      URL p = new URL (u, name, getHandler0 (u.getProtocol()));
-
+			    
 	      InputStream is = p.openStream();
 	      if (is != null)
 		{
 		  is.close();
-		  return p;
+		  results.addElement (p);
 		}
 	    }
-	
+		    
 	  // if we get an exception ... try the next path element
 	} catch (IOException x) {
 	  continue;
 	}
       }
-
-    return null;
+	
+    return results.elements ();
   }
 
-  /** IN jdk 1.2 this method is not overridden, but we gain performance
-      by doing so.
-   */
-
-  public InputStream getResourceAsStream (String name)
+  public URL findResource (String name)
   {
     for (int i = 0; i < path.size(); i++)
       {
-	URL u    = (URL)path.elementAt (i);
+	URL u = (URL)path.elementAt (i);
 	
 	try {
 	  JarURLConnection conn = (JarURLConnection) info.elementAt (i);
-	  
+ 	  
 	  if (conn != null)
 	    {
-	      JarFile file = conn.getJarFile ();
-	      JarEntry ent = file.getJarEntry (name);
-	      if (ent != null)
-		return file.getInputStream(ent);
+	      if (conn.getJarFile().getJarEntry (name) != null)
+		return new URL(u, name, getHandler0 (u.getProtocol()));
 	    }
 	  else
 	    {
-	      InputStream is = new URL(u, name, getHandler0 (u.getProtocol())).openStream();
+	      URL p = new URL (u, name, getHandler0 (u.getProtocol()));
+
+	      InputStream is = p.openStream();
 	      if (is != null)
-		return is;
+		{
+		  is.close();
+		  return p;
+		}
 	    }
 	
 	  // if we get an exception ... try the next path element

libjava/prims.cc

@@ -67,9 +67,6 @@ details.  */
 #include <ltdl.h>
 #endif
 
-// We use placement new.
-#include <new>
-
 // We allocate a single OutOfMemoryError exception which we keep
 // around for use if we run out of memory.
 static java::lang::OutOfMemoryError *no_memory;
@@ -414,9 +411,8 @@ _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
   obj = (jobjectArray) _Jv_AllocArray (size, klass);
   if (__builtin_expect (! obj, false))
     JvThrow (no_memory);
-  // Use placement new to initialize length field.
-  new (obj) __JArray (count);
-  jobject *ptr = elements(obj);
+  obj->length = count;
+  jobject *ptr = elements (obj);
   // We know the allocator returns zeroed memory.  So don't bother
   // zeroing it again.
   if (init)
@@ -450,8 +446,7 @@ _Jv_NewPrimArray (jclass eltype, jint count)
   __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
   if (__builtin_expect (! arr, false))
     JvThrow (no_memory);
-  // Use placement new to initialize length field.
-  new (arr) __JArray (count);
+  arr->length = count;
   // Note that we assume we are given zeroed memory by the allocator.
 
   return arr;