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Diffstat (limited to 'libjava/classpath/java/rmi/MarshalledObject.java')
-rw-r--r-- | libjava/classpath/java/rmi/MarshalledObject.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/libjava/classpath/java/rmi/MarshalledObject.java b/libjava/classpath/java/rmi/MarshalledObject.java new file mode 100644 index 0000000..9ec0ace --- /dev/null +++ b/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; + } + +} |