cms/org.argeo.slc.spring/src/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.jar.JarFile;
   8 import java.util.jar.Manifest;
   9
  10 import org.apache.commons.io.IOUtils;
  11 import org.apache.commons.logging.Log;
  12 import org.apache.commons.logging.LogFactory;
  13 import org.osgi.framework.Constants;
  14
  15 /** <b>Experimental</b> */
  16 public class FileSystemBundleRegister implements BundleRegister {
  17         private final static Log log = LogFactory
  18                         .getLog(FileSystemBundleRegister.class);
  19         private Properties packagesBundles = null;
  20
  21         public String bundleProvidingPackage(String pkg, String version) {
  22                 if (packagesBundles == null)
  23                         return null;
  24                 return packagesBundles.getProperty(pkg);
  25         }
  26
  27         protected void scan(File baseDirectory) {
  28                 long begin = System.currentTimeMillis();
  29                 int bundleCount = 0;
  30                 int packageCount = 0;
  31
  32                 packagesBundles = new Properties();
  33
  34                 File[] files = baseDirectory.listFiles();
  35                 for (File file : files) {
  36                         if (file.isDirectory()) {
  37
  38                         } else {
  39                                 JarFile jarFile = null;
  40                                 try {
  41                                         jarFile = new JarFile(file);
  42                                         Manifest manifest = jarFile.getManifest();
  43                                         String symbolicName = manifest.getMainAttributes()
  44                                                         .getValue(Constants.BUNDLE_SYMBOLICNAME);
  45                                         String exportPackage = manifest.getMainAttributes()
  46                                                         .getValue(Constants.EXPORT_PACKAGE);
  47
  48                                         // List exported packages
  49                                         Set<String> exportedPackages = exportPackageToPackageNames(exportPackage);
  50
  51                                         for (String exportedPackage : exportedPackages) {
  52                                                 packagesBundles.put(exportedPackage, symbolicName);
  53                                                 packageCount++;
  54                                                 if (log.isTraceEnabled())
  55                                                         log.trace("Register " + exportedPackage + "="
  56                                                                         + symbolicName);
  57                                         }
  58                                         bundleCount++;
  59                                 } catch (Exception e) {
  60                                         log.warn("Cannot scan " + file, e);
  61                                         if (log.isTraceEnabled())
  62                                                 e.printStackTrace();
  63                                 } finally {
  64                                         IOUtils.closeQuietly(jarFile);
  65                                 }
  66                         }
  67                 }
  68                 if (log.isDebugEnabled())
  69                         log.debug("Scanned " + bundleCount + " bundles with "
  70                                         + packageCount + " packages in "
  71                                         + (System.currentTimeMillis() - begin) + " ms");
  72         }
  73
  74         protected Set<String> exportPackageToPackageNames(String exportPackage) {
  75                 Set<String> exportedPackages = new HashSet<String>();
  76                 if (exportPackage == null)
  77                         return exportedPackages;
  78                 char[] arr = exportPackage.toCharArray();
  79
  80                 StringBuffer currentPkg = new StringBuffer("");
  81                 boolean skip = false;
  82                 boolean inQuote = false;
  83                 for (char c : arr) {
  84                         if (c == ' ' || c == '\n') {
  85                                 // ignore
  86                         } else if (c == ';') {
  87                                 if (!skip)
  88                                         skip = true;
  89                         } else if (c == ',') {
  90                                 if (skip && !inQuote) {
  91                                         skip = false;
  92                                         // add new package
  93                                         exportedPackages.add(currentPkg.toString());
  94                                         currentPkg = new StringBuffer("");
  95                                 }
  96                         } else if (c == '\"') {
  97                                 inQuote = inQuote ? false : true;
  98                         } else {
  99                                 if (!skip)
 100                                         currentPkg.append(c);
 101                         }
 102                 }
 103
 104                 return exportedPackages;
 105         }
 106
 107         public static void main(String[] args) {
 108                 FileSystemBundleRegister fsbr = new FileSystemBundleRegister();
 109                 fsbr.scan(new File(
 110                                 "/home/mbaudier/dev/src/slc/dist/org.argeo.slc.sdk/target/lib"));
 111
 112         }
 113 }