| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.netbeans; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.StringTokenizer; |
| |
| /** |
| * |
| * @author Jaroslav Tulach <jtulach@netbeans.org> |
| */ |
| final class Clusters implements Stamps.Updater { |
| private static String[] dirs; |
| private static String dirPrefix; |
| private static final Clusters INSTANCE = new Clusters(); |
| |
| private Clusters() { |
| } |
| |
| static void scheduleSave(Stamps s) { |
| s.scheduleSaveImpl(INSTANCE, "all-clusters.dat", false); // NOI18N |
| } |
| |
| static boolean compareDirs(DataInputStream is) throws IOException { |
| int cnt = is.readInt(); |
| String[] arr = relativeDirsWithHome(); |
| if (cnt != arr.length) { |
| return false; |
| } |
| for (int i = 0; i < arr.length; i++) { |
| String cluster = is.readUTF(); |
| if (!cluster.equals(arr[i])) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| static synchronized String[] dirs() { |
| if (dirs == null) { |
| List<String> tmp = new ArrayList<String>(); |
| String nbdirs = System.getProperty("netbeans.dirs"); |
| if (nbdirs != null) { |
| StringTokenizer tok = new StringTokenizer(nbdirs, File.pathSeparator); |
| while (tok.hasMoreTokens()) { |
| tmp.add(tok.nextToken()); |
| } |
| } |
| dirs = tmp.toArray(new String[tmp.size()]); |
| } |
| return dirs; |
| } |
| |
| static int findCommonPrefix(String s1, String s2) { |
| int len = Math.min(s1.length(), s2.length()); |
| int max = 0; |
| for (int i = 0; i < len; i++) { |
| final char ch = s1.charAt(i); |
| if (ch != s2.charAt(i)) { |
| return max; |
| } |
| if (ch == '/' || ch == File.separatorChar) { |
| max = i + 1; |
| } |
| } |
| return len; |
| } |
| |
| static synchronized String dirPrefix() { |
| if (dirPrefix == null) { |
| String p = System.getProperty("netbeans.home"); |
| for (String d : dirs()) { |
| if (p == null) { |
| p = d; |
| } else { |
| int len = findCommonPrefix(p, d); |
| if (len <= 3) { |
| p = ""; |
| break; |
| } |
| p = p.substring(0, len); |
| } |
| } |
| dirPrefix = p == null ? "" : p; |
| } |
| return dirPrefix; |
| } |
| |
| static String[] relativeDirsWithHome() { |
| String[] arr = dirs(); |
| String[] tmp = new String[arr.length + 1]; |
| tmp[0] = System.getProperty("netbeans.home", ""); // NOI18N |
| if (tmp[0].length() >= dirPrefix().length()) { |
| tmp[0] = tmp[0].substring(dirPrefix().length()); |
| } |
| for (int i = 0; i < arr.length; i++) { |
| tmp[i + 1] = arr[i].substring(dirPrefix().length()).replace(File.separatorChar, '/'); |
| } |
| return tmp; |
| } |
| |
| static synchronized void clear() { |
| dirs = null; |
| dirPrefix = null; |
| } |
| |
| @Override |
| public void flushCaches(DataOutputStream os) throws IOException { |
| String[] arr = relativeDirsWithHome(); |
| os.writeInt(arr.length); |
| for (int i = 0; i < arr.length; i++) { |
| os.writeUTF(arr[i]); |
| } |
| } |
| |
| @Override |
| public void cacheReady() { |
| } |
| |
| } |