Robust/Transactions/TransactionalIO/src/TransactionalIO/core/TransactionalFileWrapperFactory.java

   1 /*
   2  * To change this template, choose Tools | Templates
   3  * and open the template in the editor.
   4  */
   5 package TransactionalIO.core;
   6
   7 import java.io.File;
   8 import java.util.HashMap;
   9
  10 /**
  11  *
  12  * @author navid
  13  */
  14 public class TransactionalFileWrapperFactory {
  15
  16
  17
  18     private TransactionalFileWrapperFactory() {
  19     }
  20   //  private static HashMap<INode, Adapter> filemappings;
  21     public static HashMap filemappings = new HashMap();
  22
  23     private static native long getINodeNative(String filename);
  24
  25    // static{
  26         //System.load("/home/navid/libnav.so");
  27        // System.load("/home/navid/libkooni.so");
  28   //  }
  29
  30     static INode getINodefromFileName(String filename) {
  31         return new INode(getINodeNative(filename), filename);
  32     }
  33
  34
  35
  36     public synchronized static GlobalINodeState getTateransactionalFileINodeState(INode inode) {
  37
  38         return (GlobalINodeState)filemappings.get(inode.getNumber());
  39
  40     }
  41     public synchronized static GlobalINodeState createTransactionalFile(INode inode, String filename, String mode) {
  42
  43         long inodenumber = inode.getNumber();
  44         if (inodenumber != -1)
  45
  46             if (filemappings.containsKey(inode.getNumber())) {
  47              //   System.out.println("here");
  48                 return (GlobalINodeState)filemappings.get(inode.getNumber());
  49
  50             } else {
  51
  52
  53                 long length = new File(filename).length();
  54
  55                 GlobalINodeState inodestate = new GlobalINodeState(inode, length);
  56                 filemappings.put(inode.getNumber(), inodestate);
  57                 return inodestate;
  58             }
  59
  60         else
  61         {
  62             return null;
  63         }
  64
  65     }
  66
  67 }