org.argeo.slc.core/src/org/argeo/slc/osgi/FileSystemBundleRegister.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.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.io.IOUtils;
  26 import org.apache.commons.logging.Log;
  27 import org.apache.commons.logging.LogFactory;
  28 import org.osgi.framework.Constants;
  29
  30 /** <b>Experimental</b> */
  31 public class FileSystemBundleRegister implements BundleRegister {
  32         private final static Log log = LogFactory
  33                         .getLog(FileSystemBundleRegister.class);
  34         private Properties packagesBundles = null;
  35
  36         public String bundleProvidingPackage(String pkg, String version) {
  37                 if (packagesBundles == null)
  38                         return null;
  39                 return packagesBundles.getProperty(pkg);
  40         }
  41
  42         protected void scan(File baseDirectory) {
  43                 long begin = System.currentTimeMillis();
  44                 int bundleCount = 0;
  45                 int packageCount = 0;
  46
  47                 packagesBundles = new Properties();
  48
  49                 File[] files = baseDirectory.listFiles();
  50                 for (File file : files) {
  51                         if (file.isDirectory()) {
  52
  53                         } else {
  54                                 JarFile jarFile = null;
  55                                 try {
  56                                         jarFile = new JarFile(file);
  57                                         Manifest manifest = jarFile.getManifest();
  58                                         String symbolicName = manifest.getMainAttributes()
  59                                                         .getValue(Constants.BUNDLE_SYMBOLICNAME);
  60                                         String exportPackage = manifest.getMainAttributes()
  61                                                         .getValue(Constants.EXPORT_PACKAGE);
  62
  63                                         // List exported packages
  64                                         Set<String> exportedPackages = exportPackageToPackageNames(exportPackage);
  65
  66                                         for (String exportedPackage : exportedPackages) {
  67                                                 packagesBundles.put(exportedPackage, symbolicName);
  68                                                 packageCount++;
  69                                                 if (log.isTraceEnabled())
  70                                                         log.trace("Register " + exportedPackage + "="
  71                                                                         + symbolicName);
  72                                         }
  73                                         bundleCount++;
  74                                 } catch (Exception e) {
  75                                         log.warn("Cannot scan " + file, e);
  76                                         if (log.isTraceEnabled())
  77                                                 e.printStackTrace();
  78                                 } finally {
  79                                         IOUtils.closeQuietly(jarFile);
  80                                 }
  81                         }
  82                 }
  83                 if (log.isDebugEnabled())
  84                         log.debug("Scanned " + bundleCount + " bundles with "
  85                                         + packageCount + " packages in "
  86                                         + (System.currentTimeMillis() - begin) + " ms");
  87         }
  88
  89         protected Set<String> exportPackageToPackageNames(String exportPackage) {
  90                 Set<String> exportedPackages = new HashSet<String>();
  91                 if (exportPackage == null)
  92                         return exportedPackages;
  93                 char[] arr = exportPackage.toCharArray();
  94
  95                 StringBuffer currentPkg = new StringBuffer("");
  96                 boolean skip = false;
  97                 boolean inQuote = false;
  98                 for (char c : arr) {
  99                         if (c == ' ' || c == '\n') {
 100                                 // ignore
 101                         } else if (c == ';') {
 102                                 if (!skip)
 103                                         skip = true;
 104                         } else if (c == ',') {
 105                                 if (skip && !inQuote) {
 106                                         skip = false;
 107                                         // add new package
 108                                         exportedPackages.add(currentPkg.toString());
 109                                         currentPkg = new StringBuffer("");
 110                                 }
 111                         } else if (c == '\"') {
 112                                 inQuote = inQuote ? false : true;
 113                         } else {
 114                                 if (!skip)
 115                                         currentPkg.append(c);
 116                         }
 117                 }
 118
 119                 return exportedPackages;
 120         }
 121
 122         public static void main(String[] args) {
 123                 FileSystemBundleRegister fsbr = new FileSystemBundleRegister();
 124                 fsbr.scan(new File(
 125                                 "/home/mbaudier/dev/src/slc/dist/org.argeo.slc.sdk/target/lib"));
 126
 127         }
 128 }