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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package com.sun.star.lib.uno.environments.remote;
import com.sun.star.uno.UnoRuntime;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.util.Arrays;
public final class ThreadId {
public static ThreadId createFresh() {
BigInteger c;
synchronized (PREFIX) {
c = count;
count = count.add(BigInteger.ONE);
}
try {
return new ThreadId((PREFIX + c).getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("this cannot happen: " + e);
}
}
public ThreadId(byte[] id) {
this.id = id;
}
public boolean equals(Object obj) {
return obj instanceof ThreadId
&& Arrays.equals(id, ((ThreadId) obj).id);
}
public int hashCode() {
int h = hash;
if (h == 0) {
// Same algorithm as java.util.List.hashCode (also see Java 1.5
// java.util.Arrays.hashCode(byte[])):
h = 1;
for (int i = 0; i < id.length; ++i) {
h = 31 * h + id[i];
}
hash = h;
}
return h;
}
public String toString() {
StringBuffer b = new StringBuffer("[ThreadId:");
for (int i = 0; i < id.length; ++i) {
String n = Integer.toHexString(id[i] & 0xFF);
if (n.length() == 1) {
b.append('0');
}
b.append(n);
}
b.append(']');
return b.toString();
}
public byte[] getBytes() {
return id;
}
private static final String PREFIX
= "java:" + UnoRuntime.getUniqueKey() + ":";
private static BigInteger count = BigInteger.ZERO;
private byte[] id;
private int hash = 0;
}
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