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

   1 package org.argeo.slc.osgi;
   2
   3 import java.io.File;
   4 import java.util.HashSet;
   5 import java.util.Properties;
   6 import java.util.Set;
   7 import java.util.StringTokenizer;
   8 import java.util.jar.JarFile;
   9 import java.util.jar.Manifest;
  10
  11 import org.apache.commons.logging.Log;
  12 import org.apache.commons.logging.LogFactory;
  13 import org.osgi.framework.Constants;
  14
  15 public class FileSystemBundleRegister implements BundleRegister {
  16         private final static Log log = LogFactory
  17                         .getLog(FileSystemBundleRegister.class);
  18
  19         private File baseDirectory;
  20
  21         private Properties packagesBundles = null;
  22
  23         public String bundleProvidingPackage(String pkg, String version) {
  24                 if (packagesBundles == null)
  25                         return null;
  26                 return packagesBundles.getProperty(pkg);
  27         }
  28
  29         protected void scan(File baseDirectory) {
  30                 long begin = System.currentTimeMillis();
  31                 int bundleCount = 0;
  32                 int packageCount = 0;
  33
  34                 packagesBundles = new Properties();
  35
  36                 File[] files = baseDirectory.listFiles();
  37                 for (File file : files) {
  38                         if (file.isDirectory()) {
  39
  40                         } else {
  41                                 try {
  42                                         JarFile jarFile = new JarFile(file);
  43                                         Manifest manifest = jarFile.getManifest();
  44                                         String symbolicName = manifest.getMainAttributes()
  45                                                         .getValue(Constants.BUNDLE_SYMBOLICNAME);
  46                                         String exportPackage = manifest.getMainAttributes()
  47                                                         .getValue(Constants.EXPORT_PACKAGE);
  48
  49                                         // List exported packages
  50                                         Set<String> exportedPackages = exportPackageToPackageNames(exportPackage);
  51
  52                                         for (String exportedPackage : exportedPackages) {
  53                                                 packagesBundles.put(exportedPackage, symbolicName);
  54                                                 packageCount++;
  55                                                 if (log.isTraceEnabled())
  56                                                         log.trace("Register " + exportedPackage + "="
  57                                                                         + symbolicName);
  58                                         }
  59                                         bundleCount++;
  60                                 } catch (Exception e) {
  61                                         log.warn("Cannot scan " + file, e);
  62                                         if (log.isTraceEnabled())
  63                                                 e.printStackTrace();
  64                                 }
  65                         }
  66                 }
  67                 if (log.isDebugEnabled())
  68                         log.debug("Scanned " + bundleCount + " bundles with "
  69                                         + packageCount + " packages in "
  70                                         + (System.currentTimeMillis() - begin) + " ms");
  71         }
  72
  73         protected Set<String> exportPackageToPackageNames(String exportPackage) {
  74                 Set<String> exportedPackages = new HashSet<String>();
  75                 if (exportPackage == null)
  76                         return exportedPackages;
  77                 char[] arr = exportPackage.toCharArray();
  78
  79                 StringBuffer currentPkg = new StringBuffer("");
  80                 boolean skip = false;
  81                 boolean inQuote = false;
  82                 for (char c : arr) {
  83                         if (c == ' ' || c == '\n') {
  84                                 // ignore
  85                         } else if (c == ';') {
  86                                 if (!skip)
  87                                         skip = true;
  88                         } else if (c == ',') {
  89                                 if (skip && !inQuote) {
  90                                         skip = false;
  91                                         // add new package
  92                                         exportedPackages.add(currentPkg.toString());
  93                                         currentPkg = new StringBuffer("");
  94                                 }
  95                         } else if (c == '\"') {
  96                                 inQuote = inQuote ? false : true;
  97                         } else {
  98                                 if (!skip)
  99                                         currentPkg.append(c);
 100                         }
 101                 }
 102
 103                 return exportedPackages;
 104         }
 105
 106         public static void main(String[] args) {
 107                 FileSystemBundleRegister fsbr = new FileSystemBundleRegister();
 108                 fsbr.scan(new File(
 109                                 "/home/mbaudier/dev/src/slc/dist/org.argeo.slc.sdk/target/lib"));
 110
 111         }
 112 }