Examples of java.io.DataInputStream.reset()

java.io.DataInputStream.reset()
Repositions this stream to the position at the time the mark method was last called on this input stream.
This method simply performs in.reset().
Stream marks are intended to be used in situations where you need to read ahead a little to see what's in the stream. Often this is most easily done by invoking some general parser. If the stream is of the type handled by the parse, it just chugs along happily. If the stream is not of that type, the parser should toss an exception when it fails. If this happens within readlimit bytes, it allows the outer code to reset the stream and try another parser. @exception IOException if the stream has not been marked or if themark has been invalidated.

              new FileInputStream(edits)));
      // Read log file version. Could be missing. 
      in.mark( 4 );
      if( in.available() > 0 ) {
        logVersion = in.readByte();
        in.reset();
        if( logVersion >= 0 )
          logVersion = 0;
        else
          logVersion = in.readInt();
        if( logVersion < FSConstants.DFS_CURRENT_VERSION ) // future version

View Full Code Here

        logVersion = in.readByte();
      } catch (EOFException e) {
        available = false;
      }
      if (available) {
        in.reset();
        logVersion = in.readInt();
        if (logVersion < FSConstants.LAYOUT_VERSION) // future version
          throw new IOException(
                          "Unexpected version of the file system log file: "
                          + logVersion + ". Current version = "

View Full Code Here

        logVersion = in.readByte();
      } catch (EOFException e) {
        available = false;
      }
      if (available) {
        in.reset();
        if (logVersion >= 0)
          logVersion = 0;
        else
          logVersion = in.readInt();
        if (logVersion < FSConstants.LAYOUT_VERSION) // future version

View Full Code Here

        data = new byte[length];
        writeInt(rootRes, data, 0);
        writeInt(indexLength, data, 4);


        // now reset to the mark, which was set after reading rootRes and indexLength
        ds.reset();
        ds.readFully(data, 8, length-8);
    }


    /**
     * Gets the full name of the resource with suffix.

View Full Code Here

    
        This.fTrie = new CharTrie(dis, fTrieFoldingFunc);  // Deserialize the TRIE, leaving input
                                                //  stream at an unknown position, preceding the
                                                //  padding between TRIE and following section.
    
        dis.reset();                            // Move input stream back to marked position at
                                                //   the start of the serialized TRIE.  Now our
                                                //   "pos" variable and the input stream are in
                                                //   agreement.
        
        //

View Full Code Here

    
        This.fTrie = new CharTrie(dis, fTrieFoldingFunc);  // Deserialize the TRIE, leaving input
                                                //  stream at an unknown position, preceding the
                                                //  padding between TRIE and following section.
    
        dis.reset();                            // Move input stream back to marked position at
                                                //   the start of the serialized TRIE.  Now our
                                                //   "pos" variable and the input stream are in
                                                //   agreement.
        
        //

View Full Code Here

        logVersion = in.readByte();
      } catch (EOFException e) {
        available = false;
      }
      if (available) {
        in.reset();
        logVersion = in.readInt();
        if (logVersion < FSConstants.LAYOUT_VERSION) // future version
          throw new IOException(
                          "Unexpected version of the file system log file: "
                          + logVersion + ". Current version = "

View Full Code Here

        logVersion = in.readByte();
      } catch (EOFException e) {
        available = false;
      }
      if (available) {
        in.reset();
        logVersion = in.readInt();
        if (logVersion < FSConstants.LAYOUT_VERSION) // future version
          throw new IOException(
                          "Unexpected version of the file system log file: "
                          + logVersion + ". Current version = "

View Full Code Here

            int lastIndex = header.numRecords - 1;


            for (int i = 0; i < lastIndex; i++) {


                //dis.seek(recOffset[i]);
    dis.reset();
    dis.skip(recOffset[i]);
                len = recOffset[i+1] - recOffset[i];
                bytes = new byte[len];
                dis.readFully(bytes);
                recArray[i] = new Record(bytes, recAttrs[i]);

View Full Code Here

                recArray[i] = new Record(bytes, recAttrs[i]);
            }
     
            // last record
          
            dis.reset();
      len = (int) dis.available() - recOffset[lastIndex];
      dis.skip(recOffset[lastIndex]);     
      bytes = new byte[len];
            dis.readFully(bytes);
            recArray[lastIndex] = new Record(bytes, recAttrs[lastIndex]);

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.