src/solaris/classes/sun/net/www/protocol/jar/JarFileFactory.java

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  26 package sun.net.www.protocol.jar;
  27 
  28 import java.io.IOException;
  29 import java.io.FileNotFoundException;
  30 import java.net.URL;
  31 import java.net.URLConnection;
  32 import java.util.HashMap;
  33 import java.util.jar.JarFile;
  34 import java.security.Permission;
  35 import sun.net.util.URLUtil;
  36 
  37 /* A factory for cached JAR file. This class is used to both retrieve
  38  * and cache Jar files.
  39  *
  40  * @author Benjamin Renaud
  41  * @since JDK1.2
  42  */
  43 class JarFileFactory implements URLJarFile.URLJarFileCloseController {
  44 
  45     /* the url to file cache */
  46     private static HashMap<String, JarFile> fileCache = new HashMap<String, JarFile>();
  47 
  48     /* the file to url cache */
  49     private static HashMap<JarFile, URL> urlCache = new HashMap<JarFile, URL>();
  50 








  51     URLConnection getConnection(JarFile jarFile) throws IOException {
  52         URL u = urlCache.get(jarFile);



  53         if (u != null)
  54             return u.openConnection();
  55 
  56         return null;
  57     }
  58 
  59     public JarFile get(URL url) throws IOException {
  60         return get(url, true);
  61     }
  62 
  63     JarFile get(URL url, boolean useCaches) throws IOException {
  64 
  65         JarFile result = null;
  66         JarFile local_result = null;
  67 
  68         if (useCaches) {
  69             synchronized (this) {
  70                 result = getCachedJarFile(url);
  71             }
  72             if (result == null) {
  73                 local_result = URLJarFile.getJarFile(url, this);
  74                 synchronized (this) {
  75                     result = getCachedJarFile(url);
  76                     if (result == null) {
  77                         fileCache.put(URLUtil.urlNoFragString(url), local_result);
  78                         urlCache.put(local_result, url);
  79                         result = local_result;
  80                     } else {
  81                         if (local_result != null) {
  82                             local_result.close();
  83                         }
  84                     }
  85                 }
  86             }
  87         } else {
  88             result = URLJarFile.getJarFile(url, this);
  89         }
  90         if (result == null)
  91             throw new FileNotFoundException(url.toString());
  92 
  93         return result;
  94     }
  95 
  96     /**
  97      * Callback method of the URLJarFileCloseController to
  98      * indicate that the JarFile is close. This way we can
  99      * remove the JarFile from the cache
 100      */
 101     public void close(JarFile jarFile) {

 102         URL urlRemoved = urlCache.remove(jarFile);
 103         if( urlRemoved != null) {
 104                 fileCache.remove(URLUtil.urlNoFragString(urlRemoved));
 105         }
 106     }
 107 
 108 
 109     private JarFile getCachedJarFile(URL url) {
 110         JarFile result = fileCache.get(URLUtil.urlNoFragString(url));
 111 
 112         /* if the JAR file is cached, the permission will always be there */
 113         if (result != null) {
 114             Permission perm = getPermission(result);
 115             if (perm != null) {
 116                 SecurityManager sm = System.getSecurityManager();
 117                 if (sm != null) {
 118                     try {
 119                         sm.checkPermission(perm);
 120                     } catch (SecurityException se) {
 121                         // fallback to checkRead/checkConnect for pre 1.2
 122                         // security managers
 123                         if ((perm instanceof java.io.FilePermission) &&
 124                             perm.getActions().indexOf("read") != -1) {
 125                             sm.checkRead(perm.getName());
 126                         } else if ((perm instanceof
 127                             java.net.SocketPermission) &&
 128                             perm.getActions().indexOf("connect") != -1) {




  26 package sun.net.www.protocol.jar;
  27 
  28 import java.io.IOException;
  29 import java.io.FileNotFoundException;
  30 import java.net.URL;
  31 import java.net.URLConnection;
  32 import java.util.HashMap;
  33 import java.util.jar.JarFile;
  34 import java.security.Permission;
  35 import sun.net.util.URLUtil;
  36 
  37 /* A factory for cached JAR file. This class is used to both retrieve
  38  * and cache Jar files.
  39  *
  40  * @author Benjamin Renaud
  41  * @since JDK1.2
  42  */
  43 class JarFileFactory implements URLJarFile.URLJarFileCloseController {
  44 
  45     /* the url to file cache */
  46     private static final HashMap<String, JarFile> fileCache = new HashMap<>();
  47 
  48     /* the file to url cache */
  49     private static final HashMap<JarFile, URL> urlCache = new HashMap<>();
  50 
  51     private static final JarFileFactory instance = new JarFileFactory();
  52 
  53     private JarFileFactory() { }
  54 
  55     public static JarFileFactory getInstance() {
  56         return instance;
  57     }
  58 
  59     URLConnection getConnection(JarFile jarFile) throws IOException {
  60         URL u;
  61         synchronized (instance) {
  62             u = urlCache.get(jarFile);
  63         }
  64         if (u != null)
  65             return u.openConnection();
  66 
  67         return null;
  68     }
  69 
  70     public JarFile get(URL url) throws IOException {
  71         return get(url, true);
  72     }
  73 
  74     JarFile get(URL url, boolean useCaches) throws IOException {
  75 
  76         JarFile result;
  77         JarFile local_result;
  78 
  79         if (useCaches) {
  80             synchronized (instance) {
  81                 result = getCachedJarFile(url);
  82             }
  83             if (result == null) {
  84                 local_result = URLJarFile.getJarFile(url, this);
  85                 synchronized (instance) {
  86                     result = getCachedJarFile(url);
  87                     if (result == null) {
  88                         fileCache.put(URLUtil.urlNoFragString(url), local_result);
  89                         urlCache.put(local_result, url);
  90                         result = local_result;
  91                     } else {
  92                         if (local_result != null) {
  93                             local_result.close();
  94                         }
  95                     }
  96                 }
  97             }
  98         } else {
  99             result = URLJarFile.getJarFile(url, this);
 100         }
 101         if (result == null)
 102             throw new FileNotFoundException(url.toString());
 103 
 104         return result;
 105     }
 106 
 107     /**
 108      * Callback method of the URLJarFileCloseController to
 109      * indicate that the JarFile is close. This way we can
 110      * remove the JarFile from the cache
 111      */
 112     public void close(JarFile jarFile) {
 113         synchronized (instance) {
 114             URL urlRemoved = urlCache.remove(jarFile);
 115             if( urlRemoved != null)
 116                 fileCache.remove(URLUtil.urlNoFragString(urlRemoved));
 117         }
 118     }
 119 
 120     // must be called while holding the 'instance' lock
 121     private JarFile getCachedJarFile(URL url) {
 122         JarFile result = fileCache.get(URLUtil.urlNoFragString(url));
 123 
 124         /* if the JAR file is cached, the permission will always be there */
 125         if (result != null) {
 126             Permission perm = getPermission(result);
 127             if (perm != null) {
 128                 SecurityManager sm = System.getSecurityManager();
 129                 if (sm != null) {
 130                     try {
 131                         sm.checkPermission(perm);
 132                     } catch (SecurityException se) {
 133                         // fallback to checkRead/checkConnect for pre 1.2
 134                         // security managers
 135                         if ((perm instanceof java.io.FilePermission) &&
 136                             perm.getActions().indexOf("read") != -1) {
 137                             sm.checkRead(perm.getName());
 138                         } else if ((perm instanceof
 139                             java.net.SocketPermission) &&
 140                             perm.getActions().indexOf("connect") != -1) {