Package org.eclipse.core.runtime.internal.adaptor

Source Code of org.eclipse.core.runtime.internal.adaptor.PluginConverterImpl

/*******************************************************************************
* Copyright (c) 2003, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*     IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.runtime.internal.adaptor;

import java.io.*;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.eclipse.core.runtime.adaptor.LocationManager;
import org.eclipse.osgi.framework.adaptor.FrameworkAdaptor;
import org.eclipse.osgi.framework.internal.core.Constants;
import org.eclipse.osgi.framework.internal.core.FrameworkProperties;
import org.eclipse.osgi.framework.log.FrameworkLogEntry;
import org.eclipse.osgi.internal.baseadaptor.DevClassPathHelper;
import org.eclipse.osgi.service.pluginconversion.PluginConversionException;
import org.eclipse.osgi.service.pluginconversion.PluginConverter;
import org.eclipse.osgi.service.resolver.VersionRange;
import org.eclipse.osgi.util.ManifestElement;
import org.eclipse.osgi.util.NLS;
import org.osgi.framework.*;

/**
* Internal class.
*/
public class PluginConverterImpl implements PluginConverter {
  public static boolean DEBUG = false;
  /** bundle manifest type unknown */
  static public final byte MANIFEST_TYPE_UNKNOWN = 0x00;
  /** bundle manifest type bundle (META-INF/MANIFEST.MF) */
  static public final byte MANIFEST_TYPE_BUNDLE = 0x01;
  /** bundle manifest type plugin (plugin.xml) */
  static public final byte MANIFEST_TYPE_PLUGIN = 0x02;
  /** bundle manifest type fragment (fragment.xml) */
  static public final byte MANIFEST_TYPE_FRAGMENT = 0x04;
  /** bundle manifest type jared bundle */
  static public final byte MANIFEST_TYPE_JAR = 0x08;
  private static final String SEMICOLON = "; "; //$NON-NLS-1$
  private static final String UTF_8 = "UTF-8"; //$NON-NLS-1$
  private static final String LIST_SEPARATOR = ",\n "; //$NON-NLS-1$
  private static final String LINE_SEPARATOR = "\n "; //$NON-NLS-1$
  private static final String DOT = "."; //$NON-NLS-1$
  private static int MAXLINE = 511;
  private BundleContext context;
  private FrameworkAdaptor adaptor;
  private BufferedWriter out;
  private IPluginInfo pluginInfo;
  private File pluginManifestLocation;
  private ZipFile pluginZip;
  private Dictionary generatedManifest;
  private byte manifestType;
  private Version target;
  private Dictionary devProperties;
  static final Version TARGET31 = new Version(3, 1, 0);
  static final Version TARGET32 = new Version(3, 2, 0);
  private static final String MANIFEST_VERSION = "Manifest-Version"; //$NON-NLS-1$
  private static final String PLUGIN_PROPERTIES_FILENAME = "plugin"; //$NON-NLS-1$
  private static PluginConverterImpl instance;
  private static final String[] ARCH_LIST = {org.eclipse.osgi.service.environment.Constants.ARCH_PA_RISC, org.eclipse.osgi.service.environment.Constants.ARCH_PPC, org.eclipse.osgi.service.environment.Constants.ARCH_SPARC, org.eclipse.osgi.service.environment.Constants.ARCH_X86, org.eclipse.osgi.service.environment.Constants.ARCH_AMD64, org.eclipse.osgi.service.environment.Constants.ARCH_IA64};
  static public final String FRAGMENT_MANIFEST = "fragment.xml"; //$NON-NLS-1$
  static public final String GENERATED_FROM = "Generated-from"; //$NON-NLS-1$
  static public final String MANIFEST_TYPE_ATTRIBUTE = "type"; //$NON-NLS-1$
  private static final String[] OS_LIST = {org.eclipse.osgi.service.environment.Constants.OS_AIX, org.eclipse.osgi.service.environment.Constants.OS_HPUX, org.eclipse.osgi.service.environment.Constants.OS_LINUX, org.eclipse.osgi.service.environment.Constants.OS_MACOSX, org.eclipse.osgi.service.environment.Constants.OS_QNX, org.eclipse.osgi.service.environment.Constants.OS_SOLARIS, org.eclipse.osgi.service.environment.Constants.OS_WIN32};
  protected static final String PI_RUNTIME = "org.eclipse.core.runtime"; //$NON-NLS-1$
  protected static final String PI_BOOT = "org.eclipse.core.boot"; //$NON-NLS-1$
  protected static final String PI_RUNTIME_COMPATIBILITY = "org.eclipse.core.runtime.compatibility"; //$NON-NLS-1$
  static public final String PLUGIN_MANIFEST = "plugin.xml"; //$NON-NLS-1$
  private static final String COMPATIBILITY_ACTIVATOR = "org.eclipse.core.internal.compatibility.PluginActivator"; //$NON-NLS-1$
  private static final String[] WS_LIST = {org.eclipse.osgi.service.environment.Constants.WS_CARBON, org.eclipse.osgi.service.environment.Constants.WS_GTK, org.eclipse.osgi.service.environment.Constants.WS_MOTIF, org.eclipse.osgi.service.environment.Constants.WS_PHOTON, org.eclipse.osgi.service.environment.Constants.WS_WIN32};
  private static final String IGNORE_DOT = "@ignoredot@"; //$NON-NLS-1$

  public static PluginConverterImpl getDefault() {
    return instance;
  }

  public PluginConverterImpl(FrameworkAdaptor adaptor, BundleContext context) {
    this.context = context;
    this.adaptor = adaptor;
    instance = this;
  }

  private void init() {
    // need to make sure these fields are cleared out for each conversion.
    out = null;
    pluginInfo = null;
    pluginManifestLocation = null;
    pluginZip = null;
    generatedManifest = new Hashtable(10);
    manifestType = MANIFEST_TYPE_UNKNOWN;
    target = null;
    devProperties = null;
  }

  private void fillPluginInfo(File pluginBaseLocation) throws PluginConversionException {
    pluginManifestLocation = pluginBaseLocation;
    if (pluginManifestLocation == null)
      throw new IllegalArgumentException();
    InputStream pluginFile = null;
    try {
      try {
        pluginFile = findPluginManifest(pluginBaseLocation);
      } catch (IOException e) {
        throw new PluginConversionException(NLS.bind(EclipseAdaptorMsg.ECLIPSE_CONVERTER_FILENOTFOUND, pluginBaseLocation.getAbsolutePath()), e);
      }
      if (pluginFile == null)
        throw new PluginConversionException(NLS.bind(EclipseAdaptorMsg.ECLIPSE_CONVERTER_FILENOTFOUND, pluginBaseLocation.getAbsolutePath()));
      pluginInfo = parsePluginInfo(pluginFile);
    } finally {
      if (pluginZip != null)
        try {
          pluginZip.close();
          pluginZip = null;
        } catch (IOException e) {
          // ignore
        }
    }
    String validation = pluginInfo.validateForm();
    if (validation != null)
      throw new PluginConversionException(validation);
  }

  private Set filterExport(Collection exportToFilter, Collection filter) {
    if (filter == null || filter.contains("*")) //$NON-NLS-1$
      return (Set) exportToFilter;
    Set filteredExport = new HashSet(exportToFilter.size());
    for (Iterator iter = exportToFilter.iterator(); iter.hasNext();) {
      String anExport = (String) iter.next();
      for (Iterator iter2 = filter.iterator(); iter2.hasNext();) {
        String aFilter = (String) iter2.next();
        int dotStar = aFilter.indexOf(".*"); //$NON-NLS-1$
        if (dotStar != -1)
          aFilter = aFilter.substring(0, dotStar);
        if (anExport.equals(aFilter)) {
          filteredExport.add(anExport);
          break;
        }
      }
    }
    return filteredExport;
  }

  private ArrayList findOSJars(File pluginRoot, String path, boolean filter) {
    path = path.substring(4);
    ArrayList found = new ArrayList(0);
    for (int i = 0; i < OS_LIST.length; i++) {
      //look for os/osname/path
      String searchedPath = "os/" + OS_LIST[i] + "/" + path; //$NON-NLS-1$ //$NON-NLS-2$
      if (new File(pluginRoot, searchedPath).exists())
        found.add(searchedPath + (filter ? ";(os=" + WS_LIST[i] + ")" : "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
      //look for os/osname/archname/path
      for (int j = 0; j < ARCH_LIST.length; j++) {
        searchedPath = "os/" + OS_LIST[i] + "/" + ARCH_LIST[j] + "/" + path; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
        if (new File(pluginRoot, searchedPath).exists()) {
          found.add(searchedPath + (filter ? ";(& (os=" + WS_LIST[i] + ") (arch=" + ARCH_LIST[j] + ")" : "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
        }
      }
    }
    return found;
  }

  private InputStream findPluginManifest(File baseLocation) throws IOException {
    //Here, we can not use the bundlefile because it may explode the jar and returns a location from which we will not be able to derive the jars location
    if (pluginZip != null)
      try {
        pluginZip.close();
      } catch (IOException e) {
        // ignore
      }
    pluginZip = null;
    if (!baseLocation.isDirectory()) {
      manifestType |= MANIFEST_TYPE_JAR;
      pluginZip = new ZipFile(baseLocation);
    }

    if (pluginZip != null) {
      ZipEntry manifestEntry = pluginZip.getEntry(PLUGIN_MANIFEST);
      if (manifestEntry != null) {
        manifestType |= MANIFEST_TYPE_PLUGIN;
        return pluginZip.getInputStream(manifestEntry);
      }
    } else {
      File manifestFile = new File(baseLocation, PLUGIN_MANIFEST);
      if (manifestFile.exists()) {
        manifestType |= MANIFEST_TYPE_PLUGIN;
        return new FileInputStream(manifestFile);
      }
    }

    if (pluginZip != null) {
      ZipEntry manifestEntry = pluginZip.getEntry(FRAGMENT_MANIFEST);
      if (manifestEntry != null) {
        manifestType |= MANIFEST_TYPE_PLUGIN;
        return pluginZip.getInputStream(manifestEntry);
      }
    } else {
      File manifestFile = new File(baseLocation, FRAGMENT_MANIFEST);
      if (manifestFile.exists()) {
        manifestType |= MANIFEST_TYPE_FRAGMENT;
        return new FileInputStream(manifestFile);
      }
    }

    return null;
  }

  private ArrayList findWSJars(File pluginRoot, String path, boolean filter) {
    path = path.substring(4);
    ArrayList found = new ArrayList(0);
    for (int i = 0; i < WS_LIST.length; i++) {
      String searchedPath = "ws/" + WS_LIST[i] + path; //$NON-NLS-1$
      if (new File(pluginRoot, searchedPath).exists()) {
        found.add(searchedPath + (filter ? ";(ws=" + WS_LIST[i] + ")" : "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
      }
    }
    return found;
  }

  protected void fillManifest(boolean compatibilityManifest, boolean analyseJars) {
    generateManifestVersion();
    generateHeaders();
    generateClasspath();
    generateActivator();
    generatePluginClass();
    if (analyseJars)
      generateProvidePackage();
    generateRequireBundle();
    generateLocalizationEntry();
    generateEclipseHeaders();
    if (compatibilityManifest) {
      generateTimestamp();
    }
  }

  public void writeManifest(File generationLocation, Dictionary manifestToWrite, boolean compatibilityManifest) throws PluginConversionException {
    long start = System.currentTimeMillis();
    try {
      File parentFile = new File(generationLocation.getParent());
      parentFile.mkdirs();
      generationLocation.createNewFile();
      if (!generationLocation.isFile()) {
        String message = NLS.bind(EclipseAdaptorMsg.ECLIPSE_CONVERTER_ERROR_CREATING_BUNDLE_MANIFEST, this.pluginInfo.getUniqueId(), generationLocation);
        throw new PluginConversionException(message);
      }
      // replaces any eventual existing file
      manifestToWrite = new Hashtable((Map) manifestToWrite);
      // MANIFEST.MF files must be written using UTF-8
      out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(generationLocation), UTF_8));
      writeEntry(MANIFEST_VERSION, (String) manifestToWrite.remove(MANIFEST_VERSION));
      writeEntry(GENERATED_FROM, (String) manifestToWrite.remove(GENERATED_FROM)); //Need to do this first uptoDate check expect the generated-from tag to be in the first line
      // always attempt to write the Bundle-ManifestVersion header if it exists (bug 109863)
      writeEntry(Constants.BUNDLE_MANIFESTVERSION, (String) manifestToWrite.remove(Constants.BUNDLE_MANIFESTVERSION));
      writeEntry(Constants.BUNDLE_NAME, (String) manifestToWrite.remove(Constants.BUNDLE_NAME));
      writeEntry(Constants.BUNDLE_SYMBOLICNAME, (String) manifestToWrite.remove(Constants.BUNDLE_SYMBOLICNAME));
      writeEntry(Constants.BUNDLE_VERSION, (String) manifestToWrite.remove(Constants.BUNDLE_VERSION));
      writeEntry(Constants.BUNDLE_CLASSPATH, (String) manifestToWrite.remove(Constants.BUNDLE_CLASSPATH));
      writeEntry(Constants.BUNDLE_ACTIVATOR, (String) manifestToWrite.remove(Constants.BUNDLE_ACTIVATOR));
      writeEntry(Constants.BUNDLE_VENDOR, (String) manifestToWrite.remove(Constants.BUNDLE_VENDOR));
      writeEntry(Constants.FRAGMENT_HOST, (String) manifestToWrite.remove(Constants.FRAGMENT_HOST));
      writeEntry(Constants.BUNDLE_LOCALIZATION, (String) manifestToWrite.remove(Constants.BUNDLE_LOCALIZATION));
      // always attempt to write the Export-Package header if it exists (bug 109863)
      writeEntry(Constants.EXPORT_PACKAGE, (String) manifestToWrite.remove(Constants.EXPORT_PACKAGE));
      // always attempt to write the Provide-Package header if it exists (bug 109863)
      writeEntry(Constants.PROVIDE_PACKAGE, (String) manifestToWrite.remove(Constants.PROVIDE_PACKAGE));
      writeEntry(Constants.REQUIRE_BUNDLE, (String) manifestToWrite.remove(Constants.REQUIRE_BUNDLE));
      Enumeration keys = manifestToWrite.keys();
      while (keys.hasMoreElements()) {
        String key = (String) keys.nextElement();
        writeEntry(key, (String) manifestToWrite.get(key));
      }
      out.flush();
    } catch (IOException e) {
      String message = NLS.bind(EclipseAdaptorMsg.ECLIPSE_CONVERTER_ERROR_CREATING_BUNDLE_MANIFEST, this.pluginInfo.getUniqueId(), generationLocation);
      throw new PluginConversionException(message, e);
    } finally {
      if (out != null)
        try {
          out.close();
        } catch (IOException e) {
          // only report problems writing to/flushing the file
        }
    }
    if (DEBUG)
      System.out.println("Time to write out converted manifest to: " + generationLocation + ": " + (System.currentTimeMillis() - start) + "ms."); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
  }

  private void generateLocalizationEntry() {
    generatedManifest.put(Constants.BUNDLE_LOCALIZATION, PLUGIN_PROPERTIES_FILENAME);
  }

  private void generateManifestVersion() {
    generatedManifest.put(MANIFEST_VERSION, "1.0"); //$NON-NLS-1$
  }

  private boolean requireRuntimeCompatibility() {
    ArrayList requireList = pluginInfo.getRequires();
    for (Iterator iter = requireList.iterator(); iter.hasNext();) {
      if (((PluginParser.Prerequisite) iter.next()).getName().equalsIgnoreCase(PI_RUNTIME_COMPATIBILITY))
        return true;
    }
    return false;
  }

  private void generateActivator() {
    if (!pluginInfo.isFragment())
      if (!requireRuntimeCompatibility()) {
        String pluginClass = pluginInfo.getPluginClass();
        if (pluginClass != null && !pluginClass.trim().equals("")) //$NON-NLS-1$
          generatedManifest.put(Constants.BUNDLE_ACTIVATOR, pluginClass);
      } else {
        generatedManifest.put(Constants.BUNDLE_ACTIVATOR, COMPATIBILITY_ACTIVATOR);
      }
  }

  private void generateClasspath() {
    String[] classpath = pluginInfo.getLibrariesName();
    if (classpath.length != 0)
      generatedManifest.put(Constants.BUNDLE_CLASSPATH, getStringFromArray(classpath, LIST_SEPARATOR));
  }

  private void generateHeaders() {
    if (TARGET31.compareTo(target) <= 0)
      generatedManifest.put(Constants.BUNDLE_MANIFESTVERSION, "2"); //$NON-NLS-1$
    generatedManifest.put(Constants.BUNDLE_NAME, pluginInfo.getPluginName());
    generatedManifest.put(Constants.BUNDLE_VERSION, pluginInfo.getVersion());
    generatedManifest.put(Constants.BUNDLE_SYMBOLICNAME, getSymbolicNameEntry());
    String provider = pluginInfo.getProviderName();
    if (provider != null)
      generatedManifest.put(Constants.BUNDLE_VENDOR, provider);
    if (pluginInfo.isFragment()) {
      StringBuffer hostBundle = new StringBuffer();
      hostBundle.append(pluginInfo.getMasterId());
      String versionRange = getVersionRange(pluginInfo.getMasterVersion(), pluginInfo.getMasterMatch()); // TODO need to get match rule here!
      if (versionRange != null)
        hostBundle.append(versionRange);
      generatedManifest.put(Constants.FRAGMENT_HOST, hostBundle.toString());
    }
  }

  /*
   * Generates an entry in the form:
   *   <symbolic-name>[; singleton=true]
   */
  private String getSymbolicNameEntry() {
    // false is the default, so don't bother adding anything
    if (!pluginInfo.isSingleton())
      return pluginInfo.getUniqueId();
    StringBuffer result = new StringBuffer(pluginInfo.getUniqueId());
    result.append(SEMICOLON);
    result.append(Constants.SINGLETON_DIRECTIVE);
    String assignment = TARGET31.compareTo(target) <= 0 ? ":=" : "="; //$NON-NLS-1$ //$NON-NLS-2$
    result.append(assignment).append("true"); //$NON-NLS-1$
    return result.toString();
  }

  private void generatePluginClass() {
    if (requireRuntimeCompatibility()) {
      String pluginClass = pluginInfo.getPluginClass();
      if (pluginClass != null)
        generatedManifest.put(Constants.PLUGIN_CLASS, pluginClass);
    }
  }

  private void generateProvidePackage() {
    Set exports = getExports();
    if (exports != null && exports.size() != 0) {
      generatedManifest.put(TARGET31.compareTo(target) <= 0 ? Constants.EXPORT_PACKAGE : Constants.PROVIDE_PACKAGE, getStringFromCollection(exports, LIST_SEPARATOR));
    }
  }

  private void generateRequireBundle() {
    ArrayList requiredBundles = pluginInfo.getRequires();
    if (requiredBundles.size() == 0)
      return;
    StringBuffer bundleRequire = new StringBuffer();
    for (Iterator iter = requiredBundles.iterator(); iter.hasNext();) {
      PluginParser.Prerequisite element = (PluginParser.Prerequisite) iter.next();
      StringBuffer modImport = new StringBuffer(element.getName());
      String versionRange = getVersionRange(element.getVersion(), element.getMatch());
      if (versionRange != null)
        modImport.append(versionRange);
      if (element.isExported()) {
        if (TARGET31.compareTo(target) <= 0)
          modImport.append(';').append(Constants.VISIBILITY_DIRECTIVE).append(":=").append(Constants.VISIBILITY_REEXPORT);//$NON-NLS-1$
        else
          modImport.append(';').append(Constants.REPROVIDE_ATTRIBUTE).append("=true");//$NON-NLS-1$
      }
      if (element.isOptional()) {
        if (TARGET31.compareTo(target) <= 0)
          modImport.append(';').append(Constants.RESOLUTION_DIRECTIVE).append(":=").append(Constants.RESOLUTION_OPTIONAL);//$NON-NLS-1$
        else
          modImport.append(';').append(Constants.OPTIONAL_ATTRIBUTE).append("=true");//$NON-NLS-1$
      }
      bundleRequire.append(modImport.toString());
      if (iter.hasNext())
        bundleRequire.append(LIST_SEPARATOR);
    }
    generatedManifest.put(Constants.REQUIRE_BUNDLE, bundleRequire.toString());
  }

  private void generateTimestamp() {
    // so it is easy to tell which ones are generated
    generatedManifest.put(GENERATED_FROM, Long.toString(getTimeStamp(pluginManifestLocation, manifestType)) + ";" + MANIFEST_TYPE_ATTRIBUTE + "=" + manifestType); //$NON-NLS-1$ //$NON-NLS-2$
  }

  private void generateEclipseHeaders() {
    if (pluginInfo.isFragment())
      return;

    String pluginClass = pluginInfo.getPluginClass();
    if (pluginInfo.hasExtensionExtensionPoints() || (pluginClass != null && !pluginClass.trim().equals(""))) //$NON-NLS-1$
      generatedManifest.put(TARGET32.compareTo(target) <= 0 ? Constants.ECLIPSE_LAZYSTART : Constants.ECLIPSE_AUTOSTART, "true"); //$NON-NLS-1$
  }

  private Set getExports() {
    Map libs = pluginInfo.getLibraries();
    if (libs == null)
      return null;

    //If we are in dev mode, then add the binary folders on the list libs with the export clause set to be the cumulation of the export clause of the real libs  
    if (devProperties != null || DevClassPathHelper.inDevelopmentMode()) {
      String[] devClassPath = DevClassPathHelper.getDevClassPath(pluginInfo.getUniqueId(), devProperties);
      // collect export clauses
      List allExportClauses = new ArrayList(libs.size());
      Set libEntries = libs.entrySet();
      for (Iterator iter = libEntries.iterator(); iter.hasNext();) {
        Map.Entry element = (Map.Entry) iter.next();
        allExportClauses.addAll((List) element.getValue());
      }
      if (devClassPath != null) {
        // bug 88498
        // if there is a devClassPath defined for this plugin and the @ignoredot@ flag is true
        // then we will ignore the '.' library specified in the plugin.xml
        String[] ignoreDotProp = DevClassPathHelper.getDevClassPath(IGNORE_DOT, devProperties);
        if (devClassPath.length > 0 && ignoreDotProp != null && ignoreDotProp.length > 0 && "true".equals(ignoreDotProp[0])) //$NON-NLS-1$
          libs.remove(DOT);
        for (int i = 0; i < devClassPath.length; i++)
          libs.put(devClassPath[i], allExportClauses);
      }
    }

    Set result = new TreeSet();
    Set libEntries = libs.entrySet();
    for (Iterator iter = libEntries.iterator(); iter.hasNext();) {
      Map.Entry element = (Map.Entry) iter.next();
      List filter = (List) element.getValue();
      if (filter.size() == 0) //If the library is not exported, then ignore it
        continue;
      String libEntryText = ((String) element.getKey()).trim();
      File libraryLocation;
      if (libEntryText.equals(DOT))
        libraryLocation = pluginManifestLocation;
      else {
        // in development time, libEntries may contain absolute locations (linked folders)       
        File libEntryAsPath = new File(libEntryText);
        libraryLocation = libEntryAsPath.isAbsolute() ? libEntryAsPath : new File(pluginManifestLocation, libEntryText);
      }
      Set exports = null;
      if (libraryLocation.exists()) {
        if (libraryLocation.isFile())
          exports = filterExport(getExportsFromJAR(libraryLocation), filter); //TODO Need to handle $xx$ variables
        else if (libraryLocation.isDirectory())
          exports = filterExport(getExportsFromDir(libraryLocation), filter);
      } else {
        ArrayList expandedLibs = getLibrariesExpandingVariables((String) element.getKey(), false);
        exports = new HashSet();
        for (Iterator iterator = expandedLibs.iterator(); iterator.hasNext();) {
          String libName = (String) iterator.next();
          File libFile = new File(pluginManifestLocation, libName);
          if (libFile.isFile()) {
            exports.addAll(filterExport(getExportsFromJAR(libFile), filter));
          }
        }
      }
      if (exports != null)
        result.addAll(exports);
    }
    return result;
  }

  private Set getExportsFromDir(File location) {
    return getExportsFromDir(location, ""); //$NON-NLS-1$
  }

  private Set getExportsFromDir(File location, String packageName) {
    String prefix = (packageName.length() > 0) ? (packageName + '.') : ""; //$NON-NLS-1$
    String[] files = location.list();
    Set exportedPaths = new HashSet();
    boolean containsFile = false;
    if (files != null)
      for (int i = 0; i < files.length; i++) {
        if (!isValidPackageName(files[i]))
          continue;
        File pkgFile = new File(location, files[i]);
        if (pkgFile.isDirectory())
          exportedPaths.addAll(getExportsFromDir(pkgFile, prefix + files[i]));
        else
          containsFile = true;
      }
    if (containsFile)
      // Allow the default package to be provided.  If the default package
      // contains a File then use "." as the package name to provide for default.
      if (packageName.length() > 0)
        exportedPaths.add(packageName);
      else
        exportedPaths.add(DOT);
    return exportedPaths;
  }

  private Set getExportsFromJAR(File jarFile) {
    Set names = new HashSet();
    ZipFile file = null;
    try {
      file = new ZipFile(jarFile);
    } catch (IOException e) {
      String message = NLS.bind(EclipseAdaptorMsg.ECLIPSE_CONVERTER_PLUGIN_LIBRARY_IGNORED, jarFile, pluginInfo.getUniqueId());
      adaptor.getFrameworkLog().log(new FrameworkLogEntry(FrameworkAdaptor.FRAMEWORK_SYMBOLICNAME, FrameworkLogEntry.ERROR, 0, message, 0, e, null));
      return names;
    }
    //Run through the entries
    for (Enumeration entriesEnum = file.entries(); entriesEnum.hasMoreElements();) {
      ZipEntry entry = (ZipEntry) entriesEnum.nextElement();
      String name = entry.getName();
      if (!isValidPackageName(name))
        continue;
      int lastSlash = name.lastIndexOf("/"); //$NON-NLS-1$
      //Ignore folders that do not contain files
      if (lastSlash != -1) {
        if (lastSlash != name.length() - 1 && name.lastIndexOf(' ') == -1)
          names.add(name.substring(0, lastSlash).replace('/', '.'));
      } else {
        // Allow the default package to be provided.  If the default package
        // contains a File then use "." as the package name to provide for default.
        names.add(DOT);
      }
    }
    try {
      file.close();
    } catch (IOException e) {
      // Nothing to do
    }
    return names;
  }

  private ArrayList getLibrariesExpandingVariables(String libraryPath, boolean filter) {
    String var = hasPrefix(libraryPath);
    if (var == null) {
      ArrayList returnValue = new ArrayList(1);
      returnValue.add(libraryPath);
      return returnValue;
    }
    if (var.equals("ws")) { //$NON-NLS-1$
      return findWSJars(pluginManifestLocation, libraryPath, filter);
    }
    if (var.equals("os")) { //$NON-NLS-1$
      return findOSJars(pluginManifestLocation, libraryPath, filter);
    }
    return new ArrayList(0);
  }

  //return a String representing the string found between the $s
  private String hasPrefix(String libPath) {
    if (libPath.startsWith("$ws$")) //$NON-NLS-1$
      return "ws"; //$NON-NLS-1$
    if (libPath.startsWith("$os$")) //$NON-NLS-1$
      return "os"; //$NON-NLS-1$
    if (libPath.startsWith("$nl$")) //$NON-NLS-1$
      return "nl"; //$NON-NLS-1$
    return null;
  }

  private boolean isValidPackageName(String name) {
    if (name.indexOf(' ') > 0 || name.equalsIgnoreCase("META-INF") || name.startsWith("META-INF/")) //$NON-NLS-1$ //$NON-NLS-2$
      return false;
    return true;
  }

  /**
   * Parses the plugin manifest to find out: - the plug-in unique identifier -
   * the plug-in version - runtime/libraries entries - the plug-in class -
   * the master plugin (for a fragment)
   */
  private IPluginInfo parsePluginInfo(InputStream pluginLocation) throws PluginConversionException {
    InputStream input = null;
    try {
      input = new BufferedInputStream(pluginLocation);
      return new PluginParser(adaptor, context, target).parsePlugin(input);
    } catch (Exception e) {
      String message = NLS.bind(EclipseAdaptorMsg.ECLIPSE_CONVERTER_ERROR_PARSING_PLUGIN_MANIFEST, pluginManifestLocation);
      throw new PluginConversionException(message, e);
    } finally {
      if (input != null)
        try {
          input.close();
        } catch (IOException e) {
          //ignore exception
        }
    }
  }

  public static boolean upToDate(File generationLocation, File pluginLocation, byte manifestType) {
    if (!generationLocation.isFile())
      return false;
    String secondLine = null;
    BufferedReader reader = null;
    try {
      reader = new BufferedReader(new InputStreamReader(new FileInputStream(generationLocation)));
      reader.readLine();
      secondLine = reader.readLine();
    } catch (IOException e) {
      // not a big deal - we could not read an existing manifest
      return false;
    } finally {
      if (reader != null)
        try {
          reader.close();
        } catch (IOException e) {
          // ignore
        }
    }
    String tag = GENERATED_FROM + ": "; //$NON-NLS-1$
    if (secondLine == null || !secondLine.startsWith(tag))
      return false;

    secondLine = secondLine.substring(tag.length());
    ManifestElement generatedFrom;
    try {
      generatedFrom = ManifestElement.parseHeader(PluginConverterImpl.GENERATED_FROM, secondLine)[0];
    } catch (BundleException be) {
      return false;
    }
    String timestampStr = generatedFrom.getValue();
    try {
      return Long.parseLong(timestampStr.trim()) == getTimeStamp(pluginLocation, manifestType);
    } catch (NumberFormatException nfe) {
      // not a big deal - just a bogus existing manifest that will be ignored
    }
    return false;
  }

  public static long getTimeStamp(File pluginLocation, byte manifestType) {
    if ((manifestType & MANIFEST_TYPE_JAR) != 0)
      return pluginLocation.lastModified();
    else if ((manifestType & MANIFEST_TYPE_PLUGIN) != 0)
      return new File(pluginLocation, PLUGIN_MANIFEST).lastModified();
    else if ((manifestType & MANIFEST_TYPE_FRAGMENT) != 0)
      return new File(pluginLocation, FRAGMENT_MANIFEST).lastModified();
    else if ((manifestType & MANIFEST_TYPE_BUNDLE) != 0)
      return new File(pluginLocation, Constants.OSGI_BUNDLE_MANIFEST).lastModified();
    return -1;
  }

  private void writeEntry(String key, String value) throws IOException {
    if (value != null && value.length() > 0) {
      out.write(splitOnComma(key + ": " + value)); //$NON-NLS-1$
      out.write('\n');
    }
  }

  private String splitOnComma(String value) {
    if (value.length() < MAXLINE || value.indexOf(LINE_SEPARATOR) >= 0)
      return value; // assume the line is already split
    String[] values = ManifestElement.getArrayFromList(value);
    if (values == null || values.length == 0)
      return value;
    StringBuffer sb = new StringBuffer(value.length() + ((values.length - 1) * LIST_SEPARATOR.length()));
    for (int i = 0; i < values.length - 1; i++)
      sb.append(values[i]).append(LIST_SEPARATOR);
    sb.append(values[values.length - 1]);
    return sb.toString();
  }

  private String getStringFromArray(String[] values, String separator) {
    if (values == null)
      return ""; //$NON-NLS-1$
    StringBuffer result = new StringBuffer();
    for (int i = 0; i < values.length; i++) {
      if (i > 0)
        result.append(separator);
      result.append(values[i]);
    }
    return result.toString();
  }

  private String getStringFromCollection(Collection collection, String separator) {
    StringBuffer result = new StringBuffer();
    boolean first = true;
    for (Iterator i = collection.iterator(); i.hasNext();) {
      if (first)
        first = false;
      else
        result.append(separator);
      result.append(i.next());
    }
    return result.toString();
  }

  public synchronized Dictionary convertManifest(File pluginBaseLocation, boolean compatibility, String target, boolean analyseJars, Dictionary devProperties) throws PluginConversionException {
    long start = System.currentTimeMillis();
    if (DEBUG)
      System.out.println("Convert " + pluginBaseLocation); //$NON-NLS-1$
    init();
    this.target = target == null ? TARGET32 : new Version(target);
    this.devProperties = devProperties;
    fillPluginInfo(pluginBaseLocation);
    fillManifest(compatibility, analyseJars);
    if (DEBUG)
      System.out.println("Time to convert manifest for: " + pluginBaseLocation + ": " + (System.currentTimeMillis() - start) + "ms."); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    return generatedManifest;
  }

  public synchronized File convertManifest(File pluginBaseLocation, File bundleManifestLocation, boolean compatibilityManifest, String target, boolean analyseJars, Dictionary devProperties) throws PluginConversionException {
    convertManifest(pluginBaseLocation, compatibilityManifest, target, analyseJars, devProperties);
    if (bundleManifestLocation == null) {
      String cacheLocation = FrameworkProperties.getProperty(LocationManager.PROP_MANIFEST_CACHE);
      bundleManifestLocation = new File(cacheLocation, pluginInfo.getUniqueId() + '_' + pluginInfo.getVersion() + ".MF"); //$NON-NLS-1$
    }
    if (upToDate(bundleManifestLocation, pluginManifestLocation, manifestType))
      return bundleManifestLocation;
    writeManifest(bundleManifestLocation, generatedManifest, compatibilityManifest);
    return bundleManifestLocation;
  }

  private String getVersionRange(String reqVersion, String matchRule) {
    if (reqVersion == null)
      return null;

    Version minVersion = Version.parseVersion(reqVersion);
    String versionRange;
    if (matchRule != null) {
      if (matchRule.equalsIgnoreCase(IModel.PLUGIN_REQUIRES_MATCH_PERFECT)) {
        versionRange = new VersionRange(minVersion, true, minVersion, true).toString();
      } else if (matchRule.equalsIgnoreCase(IModel.PLUGIN_REQUIRES_MATCH_EQUIVALENT)) {
        versionRange = new VersionRange(minVersion, true, new Version(minVersion.getMajor(), minVersion.getMinor() + 1, 0, ""), false).toString(); //$NON-NLS-1$
      } else if (matchRule.equalsIgnoreCase(IModel.PLUGIN_REQUIRES_MATCH_COMPATIBLE)) {
        versionRange = new VersionRange(minVersion, true, new Version(minVersion.getMajor() + 1, 0, 0, ""), false).toString(); //$NON-NLS-1$
      } else if (matchRule.equalsIgnoreCase(IModel.PLUGIN_REQUIRES_MATCH_GREATER_OR_EQUAL)) {
        // just return the reqVersion here without any version range
        versionRange = reqVersion;
      } else {
        versionRange = new VersionRange(minVersion, true, new Version(minVersion.getMajor() + 1, 0, 0, ""), false).toString(); //$NON-NLS-1$
      }
    } else {
      versionRange = new VersionRange(minVersion, true, new Version(minVersion.getMajor() + 1, 0, 0, ""), false).toString(); //$NON-NLS-1$
    }

    StringBuffer result = new StringBuffer();
    result.append(';').append(Constants.BUNDLE_VERSION_ATTRIBUTE).append('=');
    result.append('\"').append(versionRange).append('\"');
    return result.toString();
  }
}
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