runtime/org.argeo.slc.support.osgi/src/main/java/org/argeo/slc/osgi/FileSystemBundleRegister.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   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.slc.osgi;
  17
  18 import java.io.File;
  19 import java.util.HashSet;
  20 import java.util.Properties;
  21 import java.util.Set;
  22 import java.util.jar.JarFile;
  23 import java.util.jar.Manifest;
  24
  25 import org.apache.commons.logging.Log;
  26 import org.apache.commons.logging.LogFactory;
  27 import org.osgi.framework.Constants;
  28
  29 /** <b>Experimental</b> */
  30 public class FileSystemBundleRegister implements BundleRegister {
  31         private final static Log log = LogFactory
  32                         .getLog(FileSystemBundleRegister.class);
  33         private Properties packagesBundles = null;
  34
  35         public String bundleProvidingPackage(String pkg, String version) {
  36                 if (packagesBundles == null)
  37                         return null;
  38                 return packagesBundles.getProperty(pkg);
  39         }
  40
  41         protected void scan(File baseDirectory) {
  42                 long begin = System.currentTimeMillis();
  43                 int bundleCount = 0;
  44                 int packageCount = 0;
  45
  46                 packagesBundles = new Properties();
  47
  48                 File[] files = baseDirectory.listFiles();
  49                 for (File file : files) {
  50                         if (file.isDirectory()) {
  51
  52                         } else {
  53                                 try {
  54                                         JarFile jarFile = new JarFile(file);
  55                                         Manifest manifest = jarFile.getManifest();
  56                                         String symbolicName = manifest.getMainAttributes()
  57                                                         .getValue(Constants.BUNDLE_SYMBOLICNAME);
  58                                         String exportPackage = manifest.getMainAttributes()
  59                                                         .getValue(Constants.EXPORT_PACKAGE);
  60
  61                                         // List exported packages
  62                                         Set<String> exportedPackages = exportPackageToPackageNames(exportPackage);
  63
  64                                         for (String exportedPackage : exportedPackages) {
  65                                                 packagesBundles.put(exportedPackage, symbolicName);
  66                                                 packageCount++;
  67                                                 if (log.isTraceEnabled())
  68                                                         log.trace("Register " + exportedPackage + "="
  69                                                                         + symbolicName);
  70                                         }
  71                                         bundleCount++;
  72                                 } catch (Exception e) {
  73                                         log.warn("Cannot scan " + file, e);
  74                                         if (log.isTraceEnabled())
  75                                                 e.printStackTrace();
  76                                 }
  77                         }
  78                 }
  79                 if (log.isDebugEnabled())
  80                         log.debug("Scanned " + bundleCount + " bundles with "
  81                                         + packageCount + " packages in "
  82                                         + (System.currentTimeMillis() - begin) + " ms");
  83         }
  84
  85         protected Set<String> exportPackageToPackageNames(String exportPackage) {
  86                 Set<String> exportedPackages = new HashSet<String>();
  87                 if (exportPackage == null)
  88                         return exportedPackages;
  89                 char[] arr = exportPackage.toCharArray();
  90
  91                 StringBuffer currentPkg = new StringBuffer("");
  92                 boolean skip = false;
  93                 boolean inQuote = false;
  94                 for (char c : arr) {
  95                         if (c == ' ' || c == '\n') {
  96                                 // ignore
  97                         } else if (c == ';') {
  98                                 if (!skip)
  99                                         skip = true;
 100                         } else if (c == ',') {
 101                                 if (skip && !inQuote) {
 102                                         skip = false;
 103                                         // add new package
 104                                         exportedPackages.add(currentPkg.toString());
 105                                         currentPkg = new StringBuffer("");
 106                                 }
 107                         } else if (c == '\"') {
 108                                 inQuote = inQuote ? false : true;
 109                         } else {
 110                                 if (!skip)
 111                                         currentPkg.append(c);
 112                         }
 113                 }
 114
 115                 return exportedPackages;
 116         }
 117
 118         public static void main(String[] args) {
 119                 FileSystemBundleRegister fsbr = new FileSystemBundleRegister();
 120                 fsbr.scan(new File(
 121                                 "/home/mbaudier/dev/src/slc/dist/org.argeo.slc.sdk/target/lib"));
 122
 123         }
 124 }