From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/rmi/server/ObjID.java | 197 +++++++++++++++++++++++++++ 1 file changed, 197 insertions(+) create mode 100644 libjava/classpath/java/rmi/server/ObjID.java (limited to 'libjava/classpath/java/rmi/server/ObjID.java') diff --git a/libjava/classpath/java/rmi/server/ObjID.java b/libjava/classpath/java/rmi/server/ObjID.java new file mode 100644 index 000000000..2bdd44ae0 --- /dev/null +++ b/libjava/classpath/java/rmi/server/ObjID.java @@ -0,0 +1,197 @@ +/* ObjID.java -- Unique object id with respect to the given host. + Copyright (c) 1996, 1997, 1998, 1999, 2004, 2006 + 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.server; + +import java.io.DataInput; +import java.io.DataOutput; +import java.io.IOException; +import java.io.ObjectInput; +import java.io.ObjectOutput; +import java.io.Serializable; + +/** + * Represents the object identifier, unique for the host that generated it. + * The ObjID contains inside the integer object identifier that, if needed, + * may indicated that this is a reference to one of the well known objects + * on that host (registry, activator or dgc) and the {@link UID} that + * ensures uniqueness. + */ +public final class ObjID + implements Serializable +{ + + /** + * Use serial version uid for interoperability. + */ + static final long serialVersionUID = - 6386392263968365220L; + + /** + * The object counter, which value is assigned when creating the ordinary + * objects without the known object id. The counter is incremented each time + * the new ObjID is constructed. + */ + private static long next = 0x8000000000000000L; + + /** + * The object to put the lock on when incrementing {@link #next} + */ + private static final Object lock = ObjID.class; + + /** + * Defines the ID of the naming service. + */ + public static final int REGISTRY_ID = 0; + + /** + * Defines the ID of the activator. + */ + public static final int ACTIVATOR_ID = 1; + + /** + * Defines the ID of the distributed garbage collector. + */ + public static final int DGC_ID = 2; + + /** + * The object Id (either well-known value or the value of the incrementing + * object counter. + */ + long objNum; + + /** + * The object unique identifier, generated individually for each object. + */ + UID space; + + /** + * Create the new object id, unique for this host. + */ + public ObjID() + { + synchronized (lock) + { + objNum = next++; + } + space = new UID(); + } + + /** + * Create the new object id defining the well known remotely accessible + * object, present in this host. The well - known objects are: + * + * + * @param id the well known object id, one of the above. + */ + public ObjID(int id) + { + objNum = (long) id; + space = new UID((short) 0); + } + + /** + * Write object id as long, then the object {@link UID}. + */ + public void write(ObjectOutput out) throws IOException + { + DataOutput dout = (DataOutput) out; + dout.writeLong(objNum); + space.write(dout); + } + + /** + * Read object id (as long), then the object {@link UID}. + */ + public static ObjID read(ObjectInput in) throws IOException + { + DataInput din = (DataInput) in; + ObjID id = new ObjID(); + id.objNum = din.readLong(); + id.space = UID.read(din); + return (id); + } + + /** + * Get the hashcode. + */ + public int hashCode() + { + return space == null ? (int) objNum : space.hashCode() ^ (int) objNum; + } + + /** + * Compare for equality. + */ + public boolean equals(Object obj) + { + if (obj instanceof ObjID) + { + ObjID that = (ObjID) obj; + return that.objNum == objNum && eq(that.space, space); + } + else + return false; + } + + /** + * Compare by .equals if both a and b are not null, compare directly if at + * least one of them is null. + */ + static final boolean eq(Object a, Object b) + { + if (a == null || b == null) + return a == b; + else + return a.equals(b); + } + + /** + * Get the string representation. + */ + public String toString() + { + return (objNum + ":" + space); + } + +} -- cgit v1.2.3