base/runtime/org.argeo.osgi.boot/src/main/java/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(
  31                         "yyyy-MM-dd HH:mm:ss,SSS Z");
  32
  33         public static void info(Object obj) {
  34                 System.out.println("# OSGiBOOT      # " + dateFormat.format(new Date())
  35                                 + " # " + obj);
  36         }
  37
  38         public static void debug(Object obj) {
  39                 System.out.println("# OSGiBOOT DBG  # " + dateFormat.format(new Date())
  40                                 + " # " + obj);
  41         }
  42
  43         public static void warn(Object obj) {
  44                 System.out.println("# OSGiBOOT WARN # " + dateFormat.format(new Date())
  45                                 + " # " + obj);
  46         }
  47
  48         /**
  49          * Gets a property value
  50          *
  51          * @return null when defaultValue is ""
  52          */
  53         public static String getProperty(String name, String defaultValue) {
  54                 final String value;
  55                 if (defaultValue != null)
  56                         value = System.getProperty(name, defaultValue);
  57                 else
  58                         value = System.getProperty(name);
  59
  60                 if (value == null || value.equals(""))
  61                         return null;
  62                 else
  63                         return value;
  64         }
  65
  66         public static String getProperty(String name) {
  67                 return getProperty(name, null);
  68         }
  69
  70         public static String stateAsString(int state) {
  71                 switch (state) {
  72                 case Bundle.UNINSTALLED:
  73                         return "UNINSTALLED";
  74                 case Bundle.INSTALLED:
  75                         return "INSTALLED";
  76                 case Bundle.RESOLVED:
  77                         return "RESOLVED";
  78                 case Bundle.STARTING:
  79                         return "STARTING";
  80                 case Bundle.ACTIVE:
  81                         return "ACTIVE";
  82                 case Bundle.STOPPING:
  83                         return "STOPPING";
  84                 default:
  85                         return Integer.toString(state);
  86                 }
  87         }
  88
  89         /**
  90          * @return ==0: versions are identical, <0: tested version is newer, >0:
  91          *         currentVersion is newer.
  92          */
  93         public static int compareVersions(String currentVersion,
  94                         String testedVersion) {
  95                 List cToks = new ArrayList();
  96                 StringTokenizer cSt = new StringTokenizer(currentVersion, ".");
  97                 while (cSt.hasMoreTokens())
  98                         cToks.add(cSt.nextToken());
  99                 List tToks = new ArrayList();
 100                 StringTokenizer tSt = new StringTokenizer(currentVersion, ".");
 101                 while (tSt.hasMoreTokens())
 102                         tToks.add(tSt.nextToken());
 103
 104                 int comp = 0;
 105                 comp: for (int i = 0; i < cToks.size(); i++) {
 106                         if (tToks.size() <= i) {
 107                                 // equals until then, tested shorter
 108                                 comp = 1;
 109                                 break comp;
 110                         }
 111
 112                         String c = (String) cToks.get(i);
 113                         String t = (String) tToks.get(i);
 114
 115                         try {
 116                                 int cInt = Integer.parseInt(c);
 117                                 int tInt = Integer.parseInt(t);
 118                                 if (cInt == tInt)
 119                                         continue comp;
 120                                 else {
 121                                         comp = (cInt - tInt);
 122                                         break comp;
 123                                 }
 124                         } catch (NumberFormatException e) {
 125                                 if (c.equals(t))
 126                                         continue comp;
 127                                 else {
 128                                         comp = c.compareTo(t);
 129                                         break comp;
 130                                 }
 131                         }
 132                 }
 133
 134                 if (comp == 0 && tToks.size() > cToks.size()) {
 135                         // equals until then, current shorter
 136                         comp = -1;
 137                 }
 138
 139                 return comp;
 140         }
 141
 142 }