Initial revision

From-SVN: r102074

libjava/classpath/java/rmi/MarshalledObject.java

@@ -0,0 +1,113 @@
+/* MarshalledObject.java --
+   Copyright (c) 1996, 1997, 1998, 1999, 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 java.rmi;
+
+import gnu.java.rmi.RMIMarshalledObjectInputStream;
+import gnu.java.rmi.RMIMarshalledObjectOutputStream;
+
+import java.io.ByteArrayOutputStream;
+import java.io.Serializable;
+
+/**
+ * FIXME - doc missing
+ */
+public final class MarshalledObject implements Serializable 
+{
+  //The following fields are from Java API Documentation "Serialized form"
+  private static final long serialVersionUID = 8988374069173025854L;
+  byte[] objBytes;
+  byte[] locBytes;
+  int hash;
+  
+  public MarshalledObject(Object obj) throws java.io.IOException
+  {
+    ByteArrayOutputStream objStream = new ByteArrayOutputStream();
+    RMIMarshalledObjectOutputStream stream = new RMIMarshalledObjectOutputStream(objStream);
+    stream.writeObject(obj);
+    stream.flush();
+    objBytes = objStream.toByteArray();
+    locBytes = stream.getLocBytes();
+    
+    //The following algorithm of calculating hashCode is similar to String
+    hash = 0;
+    for (int i = 0; i < objBytes.length; i++)
+      hash = hash * 31 + objBytes[i];
+    if(locBytes != null)
+      for (int i = 0; i < locBytes.length; i++)
+	hash = hash * 31 + locBytes[i];
+  }
+  
+  public boolean equals(Object obj) 
+  {
+    if (! (obj instanceof MarshalledObject))
+      return false;
+
+    // hashCode even differs, don't do the time-consuming comparisons
+    if (obj.hashCode() != hash)
+      return false;
+    
+    MarshalledObject aobj = (MarshalledObject)obj;
+    if (objBytes == null || aobj.objBytes == null)
+      return objBytes == aobj.objBytes;
+    if (objBytes.length != aobj.objBytes.length)
+      return false;
+    for (int i = 0; i < objBytes.length; i++) 
+      {
+	if (objBytes[i] != aobj.objBytes[i])
+	  return false;
+      }
+    // Ignore comparison of locBytes(annotation)
+    return true;
+  }
+  
+public Object get() 
+  throws java.io.IOException, java.lang.ClassNotFoundException
+{
+  if(objBytes == null)
+    return null;
+  RMIMarshalledObjectInputStream stream = 
+    new RMIMarshalledObjectInputStream(objBytes, locBytes);
+  return stream.readObject();
+}
+  
+  public int hashCode() {
+    return hash;
+  }
+  
+}