1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 package com.sun.star.lib.uno.environments.remote; 25 26 import com.sun.star.uno.UnoRuntime; 27 import java.io.UnsupportedEncodingException; 28 import java.math.BigInteger; 29 import java.util.Arrays; 30 31 public final class ThreadId { createFresh()32 public static ThreadId createFresh() { 33 BigInteger c; 34 synchronized (PREFIX) { 35 c = count; 36 count = count.add(BigInteger.ONE); 37 } 38 try { 39 return new ThreadId((PREFIX + c).getBytes("UTF-8")); 40 } catch (UnsupportedEncodingException e) { 41 throw new RuntimeException("this cannot happen: " + e); 42 } 43 } 44 ThreadId(byte[] id)45 public ThreadId(byte[] id) { 46 this.id = id; 47 } 48 equals(Object obj)49 public boolean equals(Object obj) { 50 return obj instanceof ThreadId 51 && Arrays.equals(id, ((ThreadId) obj).id); 52 } 53 hashCode()54 public int hashCode() { 55 int h = hash; 56 if (h == 0) { 57 // Same algorithm as java.util.List.hashCode (also see Java 1.5 58 // java.util.Arrays.hashCode(byte[])): 59 h = 1; 60 for (int i = 0; i < id.length; ++i) { 61 h = 31 * h + id[i]; 62 } 63 hash = h; 64 } 65 return h; 66 } 67 toString()68 public String toString() { 69 StringBuffer b = new StringBuffer("[ThreadId:"); 70 for (int i = 0; i < id.length; ++i) { 71 String n = Integer.toHexString(id[i] & 0xFF); 72 if (n.length() == 1) { 73 b.append('0'); 74 } 75 b.append(n); 76 } 77 b.append(']'); 78 return b.toString(); 79 } 80 getBytes()81 public byte[] getBytes() { 82 return id; 83 } 84 85 private static final String PREFIX 86 = "java:" + UnoRuntime.getUniqueKey() + ":"; 87 private static BigInteger count = BigInteger.ZERO; 88 89 private byte[] id; 90 private int hash = 0; 91 } 92