PC User 2004 August/Disc 1/PCU0804CD1.iso/software/browsers/files/opera1.exe/OPERA.JAR/com/opera/PluginClassLoader.class

Java Class File | 2004-02-12 | 6.0 KB | 206 lines

package com.opera;

import java.io.File;
import java.io.FilePermission;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.SocketPermission;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLConnection;
import java.security.AccessController;
import java.security.AllPermission;
import java.security.CodeSource;
import java.security.PermissionCollection;
import java.util.Enumeration;
import java.util.PropertyPermission;

public class PluginClassLoader extends URLClassLoader {
   private static RuntimePermission usePolicyPermission = new RuntimePermission("usePolicy");
   private static PropertyPermission browserReadPerm = new PropertyPermission("browser", "read");
   private static PropertyPermission browserVerReadPerm = new PropertyPermission("browser.version", "read");
   private URL codeBase;
   String key;
   private AppContextAdapter appContext = null;
   private ThreadGroup threadGroup = null;
   private int usageCount = 0;
   private Object usageCountSync = new Object();

   URL getCodeBase() {
      return this.codeBase;
   }

   String getKey() {
      return this.key;
   }

   public PluginClassLoader(URL var1, String var2) {
      super(new URL[0]);
      this.codeBase = var1;
      this.key = var2;
   }

   public void addJar(URL var1) {
      this.addURL(var1);
   }

   ThreadGroup getThreadGroup() {
      try {
         if (this.threadGroup == null || this.threadGroup.isDestroyed()) {
            this.threadGroup = new ThreadGroup(this.codeBase + "-threadGroup");
            this.threadGroup.setMaxPriority(4);
            AppContextCreator var1 = new AppContextCreator(this.threadGroup);
            var1.setContextClassLoader(this);
            synchronized(var1.syncObject) {
               var1.start();

               try {
                  var1.syncObject.wait();
               } catch (InterruptedException var5) {
               }

               this.appContext = var1.appContext;
            }

            Object var8 = null;
         }
      } catch (Exception var7) {
         var7.printStackTrace(System.err);
      }

      return this.threadGroup;
   }

   protected int getUsageCount() {
      return this.usageCount;
   }

   protected void grab() {
      synchronized(this.usageCountSync) {
         ++this.usageCount;
         this.getThreadGroup();
      }
   }

   protected void release() {
      synchronized(this.usageCountSync) {
         if (this.usageCount > 1) {
            --this.usageCount;
         } else {
            if (this.appContext != null) {
               try {
                  this.appContext.dispose();
               } catch (IllegalThreadStateException var4) {
                  var4.printStackTrace(System.err);
               }
            }

            this.usageCount = 0;
            this.appContext = null;
            this.threadGroup = null;
            PluginPanel.cacheClassLoader(this);
         }

      }
   }

   public AppContextAdapter getAppContext() {
      return this.appContext;
   }

   public PermissionCollection getPermissions(CodeSource var1) {
      PermissionCollection var2 = super.getPermissions(var1);
      URL var3 = var1.getLocation();
      if (var3.getProtocol().equals("file")) {
         String var4 = var3.getFile().replace('/', File.separatorChar);
         if (!var4.endsWith(File.separator)) {
            int var5 = var4.lastIndexOf(File.separatorChar);
            if (var5 != -1) {
               var4 = var4.substring(0, var5 + 1) + "-";
               var2.add(new FilePermission(var4, "read"));
            }
         }

         var2.add(new SocketPermission("localhost", "connect,accept"));
         AccessController.doPrivileged(new 1(this, var2));
         if (this.codeBase.getProtocol().equals("file")) {
            String var7 = this.codeBase.getFile().replace('/', File.separatorChar);
            if (var7.endsWith(File.separator)) {
               var7 = var7 + "-";
            }

            var2.add(new FilePermission(var7, "read"));
         }
      }

      var2.add(browserReadPerm);
      var2.add(browserVerReadPerm);
      if (var1.getCertificates() != null && !var2.implies(usePolicyPermission) && this.allPermissionsGranted(var1)) {
         var2.add(new AllPermission());
      }

      return var2;
   }

   boolean allPermissionsGranted(CodeSource var1) {
      return System.getProperty("browser.opera.useCertificateHandler").equals("true") ? CertificateHandler.checkCertificates(var1) : false;
   }

   public URL findResource(String var1) {
      URL var2 = super.findResource(var1);
      if (var2 == null) {
         try {
            var2 = new URL(this.codeBase, var1);
            if (!this.resourceExists(var2)) {
               var2 = null;
            }
         } catch (Exception var4) {
            var2 = null;
         }
      }

      return var2;
   }

   private boolean resourceExists(URL var1) {
      boolean var2 = true;

      try {
         URLConnection var3 = var1.openConnection();
         if (var3 instanceof HttpURLConnection) {
            HttpURLConnection var4 = (HttpURLConnection)var3;
            int var5 = var4.getResponseCode();
            if (var5 == 200) {
               return true;
            }

            if (var5 >= 400) {
               return false;
            }
         } else {
            InputStream var7 = var3.getInputStream();
            var7.close();
         }
      } catch (Exception var6) {
         var2 = false;
      }

      return var2;
   }

   public Enumeration findResources(String var1) throws IOException {
      if (var1 != null && var1.indexOf("META-INF/services/javax.sound") != -1) {
         return new 2(this);
      } else {
         URL var2 = new URL(this.codeBase, var1);
         if (!this.resourceExists(var2)) {
            var2 = null;
         }

         Enumeration var3 = super.findResources(var1);
         return new 3(this, var3, var2);
      }
   }
}