1 files changed, 120 insertions, 0 deletions
diff --git a/libjava/java/rmi/server/UID.java b/libjava/java/rmi/server/UID.java
new file mode 100644
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+++ b/libjava/java/rmi/server/UID.java
@@ -0,0 +1,120 @@
+/*
+  Copyright (c) 1996, 1997, 1998, 1999 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License.
+ */
+
+package java.rmi.server;
+
+import java.io.Serializable;
+import java.io.DataOutput;
+import java.io.DataInput;
+import java.io.IOException;
+import java.util.Random;
+import java.lang.Thread;
+import java.lang.InterruptedException;
+
+public final class UID
+	implements Serializable {
+
+public static final long serialVersionUID = 1086053664494604050L;
+
+private static final Object lock = UID.class;
+private static long baseTime = System.currentTimeMillis();
+private static short nextCount = Short.MIN_VALUE;
+// This is sun's algorithm - don't ask me why ...
+private static final int uniqueNr = (new Object()).hashCode();
+
+private int unique;
+private long time;
+private short count;
+
+/**
+ * This is sun's algorithm - don't ask me why ...
+ */
+public UID() {
+	synchronized (lock) {
+		if (count == Short.MAX_VALUE) {
+			long newtime;
+			for (;;) {
+				newtime = System.currentTimeMillis();
+				if (newtime - baseTime > 1000) {
+					break;
+				}
+				try {
+					Thread.sleep(1000);
+				}
+				catch (InterruptedException _) {
+				}
+			}
+			baseTime = newtime;
+			nextCount = Short.MIN_VALUE;
+		}
+		count = nextCount++;
+		unique = uniqueNr;
+		time = baseTime;
+	}
+}
+
+public UID(short num) {
+	unique = (int)num;
+	time = 0;
+	count = 0;
+}
+
+public int hashCode() {
+	return (unique);
+}
+
+public boolean equals(Object obj) {
+	if (obj instanceof UID) {
+		UID uid = (UID)obj;
+		if (this.unique == uid.unique &&
+		    this.time == uid.time &&
+		    this.count == uid.count) {
+			return (true);
+		}
+	}
+	return (false);
+}
+
+public String toString() {
+	return ("[UID: " + unique + "," + time + "," + count + "]");
+}
+
+public void write(DataOutput out) throws IOException {
+	out.writeInt(unique);
+	out.writeLong(time);
+	out.writeShort(count);
+}
+
+public static UID read(DataInput in) throws IOException {
+	UID id = new UID();
+	id.unique = in.readInt();
+	id.time = in.readLong();
+	id.count = in.readShort();
+	return (id);
+}
+
+}