org.argeo.osgi.boot/src/org/argeo/osgi/boot/OsgiBootUtils.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.osgi.boot;
  17
  18 import java.text.DateFormat;
  19 import java.text.SimpleDateFormat;
  20 import java.util.ArrayList;
  21 import java.util.Date;
  22 import java.util.List;
  23 import java.util.StringTokenizer;
  24
  25 import org.osgi.framework.Bundle;
  26
  27 /** Utilities, mostly related to logging. */
  28 public class OsgiBootUtils {
  29         /** ISO8601 (as per log4j) and difference to UTC */
  30         private static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS Z");
  31
  32         static boolean debug = Boolean.valueOf(System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_DEBUG, "false"))
  33                         .booleanValue();
  34
  35         public static void info(Object obj) {
  36                 System.out.println("# OSGiBOOT      # " + dateFormat.format(new Date()) + " # " + obj);
  37         }
  38
  39         public static void debug(Object obj) {
  40                 if (debug)
  41                         System.out.println("# OSGiBOOT DBG  # " + dateFormat.format(new Date()) + " # " + obj);
  42         }
  43
  44         public static void warn(Object obj) {
  45                 System.out.println("# OSGiBOOT WARN # " + dateFormat.format(new Date()) + " # " + obj);
  46         }
  47
  48         public static void error(Object obj, Throwable e) {
  49                 System.err.println("# OSGiBOOT ERR  # " + dateFormat.format(new Date()) + " # " + obj);
  50                 if (e != null)
  51                         e.printStackTrace();
  52         }
  53
  54         public static String stateAsString(int state) {
  55                 switch (state) {
  56                 case Bundle.UNINSTALLED:
  57                         return "UNINSTALLED";
  58                 case Bundle.INSTALLED:
  59                         return "INSTALLED";
  60                 case Bundle.RESOLVED:
  61                         return "RESOLVED";
  62                 case Bundle.STARTING:
  63                         return "STARTING";
  64                 case Bundle.ACTIVE:
  65                         return "ACTIVE";
  66                 case Bundle.STOPPING:
  67                         return "STOPPING";
  68                 default:
  69                         return Integer.toString(state);
  70                 }
  71         }
  72
  73         /**
  74          * @return ==0: versions are identical, <0: tested version is newer, >0:
  75          *         currentVersion is newer.
  76          */
  77         public static int compareVersions(String currentVersion, String testedVersion) {
  78                 List<String> cToks = new ArrayList<String>();
  79                 StringTokenizer cSt = new StringTokenizer(currentVersion, ".");
  80                 while (cSt.hasMoreTokens())
  81                         cToks.add(cSt.nextToken());
  82                 List<String> tToks = new ArrayList<String>();
  83                 StringTokenizer tSt = new StringTokenizer(currentVersion, ".");
  84                 while (tSt.hasMoreTokens())
  85                         tToks.add(tSt.nextToken());
  86
  87                 int comp = 0;
  88                 comp: for (int i = 0; i < cToks.size(); i++) {
  89                         if (tToks.size() <= i) {
  90                                 // equals until then, tested shorter
  91                                 comp = 1;
  92                                 break comp;
  93                         }
  94
  95                         String c = (String) cToks.get(i);
  96                         String t = (String) tToks.get(i);
  97
  98                         try {
  99                                 int cInt = Integer.parseInt(c);
 100                                 int tInt = Integer.parseInt(t);
 101                                 if (cInt == tInt)
 102                                         continue comp;
 103                                 else {
 104                                         comp = (cInt - tInt);
 105                                         break comp;
 106                                 }
 107                         } catch (NumberFormatException e) {
 108                                 if (c.equals(t))
 109                                         continue comp;
 110                                 else {
 111                                         comp = c.compareTo(t);
 112                                         break comp;
 113                                 }
 114                         }
 115                 }
 116
 117                 if (comp == 0 && tToks.size() > cToks.size()) {
 118                         // equals until then, current shorter
 119                         comp = -1;
 120                 }
 121
 122                 return comp;
 123         }
 124
 125 }