Examples of org.apache.derby.iapi.services.io.ArrayInputStream

Package org.apache.derby.iapi.services.io

Examples of org.apache.derby.iapi.services.io.ArrayInputStream

org.apache.derby.iapi.services.io.ArrayInputStream
An InputStream that allows reading from an array of bytes. The array of bytes that is read from can be changed without having to create a new instance of this class.

     **/
  private void readPageHeader() 
        throws IOException
  {
    // these reads are always against the page array
    ArrayInputStream lrdi = rawDataIn;


    lrdi.setPosition(PAGE_HEADER_OFFSET);
    long spare;


    isOverflowPage  =  lrdi.readBoolean();
    setPageStatus    (lrdi.readByte());
    setPageVersion    (lrdi.readLong());
    slotsInUse      =  lrdi.readUnsignedShort();
    nextId          =  lrdi.readInt();
    generation      =  lrdi.readInt();     // page generation (Future Use)
    prevGeneration  =  lrdi.readInt();     // previous generation (Future Use)
    bipLocation     =  lrdi.readLong();  // BIPage location (Future Use)


    // number of deleted rows on page, we start to store this release 2.0.
    // for upgrade reasons, a 0 on disk means -1, so, we subtract one here.
    deletedRowCount =  lrdi.readUnsignedShort() - 1;


        // the next 4 (total 22 bytes) are reserved for future
    spare           =   lrdi.readUnsignedShort();  
    spare           =   lrdi.readInt();     // used by encryption
    spare           =   lrdi.readLong();
    spare           =   lrdi.readLong();
  }

View Full Code Here

    @exception IOException error in reading the header from file
  */
  private void readHeaderFromArray(byte[] a)
     throws StandardException, IOException
  {
    ArrayInputStream inStream = new ArrayInputStream(a);


    inStream.setLimit(CONTAINER_INFO_SIZE);
    int fid = inStream.readInt();
    if (fid != formatIdInteger)
        {
      throw StandardException.newException(
                SQLState.DATA_UNKNOWN_CONTAINER_FORMAT, getIdentity(), 
                new Long(fid));
        }


    int status = inStream.readInt();
    pageSize = inStream.readInt();
    spareSpace = inStream.readInt();
    minimumRecordSize = inStream.readInt();
    initialPages = inStream.readShort(); 
    PreAllocSize = inStream.readShort();
    firstAllocPageNumber = inStream.readLong();
    firstAllocPageOffset = inStream.readLong();
    containerVersion = inStream.readLong();
    estimatedRowCount = inStream.readLong();
    reusableRecordIdSequenceNumber = inStream.readLong();
    lastLogInstant = null;


    if (PreAllocSize == 0)  // pre 2.0, we don't store this.
      PreAllocSize = DEFAULT_PRE_ALLOC_SIZE;


    long spare3 = inStream.readLong();  // read spare long


    // upgrade - if this is a container that was created before
    // initialPages was stored, it will have a zero value.  Set it to the
    // default of 1.
    if (initialPages == 0)  
      initialPages = 1;


    // container read in from disk, reset preAllocation values
    PreAllocThreshold = PRE_ALLOC_THRESHOLD;


    // validate checksum
    long onDiskChecksum = inStream.readLong();
    checksum.reset();
    checksum.update(a, 0, CONTAINER_INFO_SIZE - CHECKSUM_SIZE);


    if (onDiskChecksum != checksum.getValue())
    {

View Full Code Here


    byte[] array = byteArray.getArray();
    
    // now extract the relavent information from array - basically 
    // duplicate the code in readHeaderFromArray 
    ArrayInputStream inStream = new ArrayInputStream(array);


    int status = 0;


    try
    {      
      inStream.setLimit(CONTAINER_INFO_SIZE);


      int fid = inStream.readInt();
      if (fid != formatIdInteger)
      {
        // RESOLVE: do something about this when we have > 1 container format
        throw StandardException.newException(
                    SQLState.DATA_UNKNOWN_CONTAINER_FORMAT, 
                    getIdentity(), new Long(fid));
      }


      status = inStream.readInt();
      pageSize = inStream.readInt();
      spareSpace = inStream.readInt();
      minimumRecordSize = inStream.readInt();
      initialPages = inStream.readShort(); 


    }
    catch (IOException ioe)
    {
      throw StandardException.newException(

View Full Code Here

    @exception IOException error in reading the header from file
  */
  private void readHeaderFromArray(byte[] a)
     throws StandardException, IOException
  {
    ArrayInputStream inStream = new ArrayInputStream(a);


    inStream.setLimit(0, CONTAINER_INFO_SIZE);
    int fid = inStream.readInt();
    if (fid != formatIdInteger)
        {
      throw StandardException.newException(
                SQLState.DATA_UNKNOWN_CONTAINER_FORMAT, getIdentity(), 
                new Long(fid));
        }


    int status = inStream.readInt();
    pageSize = inStream.readInt();
    spareSpace = inStream.readInt();
    minimumRecordSize = inStream.readInt();
    initialPages = inStream.readShort(); 
    PreAllocSize = inStream.readShort();
    firstAllocPageNumber = inStream.readLong();
    firstAllocPageOffset = inStream.readLong();
    containerVersion = inStream.readLong();
    estimatedRowCount = inStream.readLong();
    lastLogInstant = null;


    if (PreAllocSize == 0)  // pre 2.0, we don't store this.
      PreAllocSize = DEFAULT_PRE_ALLOC_SIZE;


    long spare2 = inStream.readLong();  // read spare long
    long spare3 = inStream.readLong();  // read spare long


    // upgrade - if this is a container that was created before
    // initialPages was stored, it will have a zero value.  Set it to the
    // default of 1.
    if (initialPages == 0)  
      initialPages = 1;


    // container read in from disk, reset preAllocation values
    PreAllocThreshold = PRE_ALLOC_THRESHOLD;


    // validate checksum
    long onDiskChecksum = inStream.readLong();
    checksum.reset();
    checksum.update(a, 0, CONTAINER_INFO_SIZE - CHECKSUM_SIZE);


    if (onDiskChecksum != checksum.getValue())
    {

View Full Code Here


    byte[] array = byteArray.getArray();
    
    // now extract the relavent information from array - basically 
    // duplicate the code in readHeaderFromArray 
    ArrayInputStream inStream = new ArrayInputStream(array);


    int status = 0;


    try
    {      
      inStream.setLimit(0, CONTAINER_INFO_SIZE);


      int fid = inStream.readInt();
      if (fid != formatIdInteger)
      {
        // RESOLVE: do something about this when we have > 1 container format
        throw StandardException.newException(
                    SQLState.DATA_UNKNOWN_CONTAINER_FORMAT, 
                    getIdentity(), new Long(fid));
      }


      status = inStream.readInt();
      pageSize = inStream.readInt();
      spareSpace = inStream.readInt();
      minimumRecordSize = inStream.readInt();
      initialPages = inStream.readShort(); 


    }
    catch (IOException ioe)
    {
      throw StandardException.newException(

View Full Code Here

  {
    super.initialize();


    if (rawDataIn == null) 
        {
      rawDataIn            = new ArrayInputStream();
      checksum             = new CRC32();
    }


    if (pageData != null)
      rawDataIn.setData(pageData);

View Full Code Here

                    "restoreRecordFromSlot called on an overflow page.");
      }


            // position the array reading stream at beginning of row data just
            // past the record header.
      ArrayInputStream lrdi = rawDataIn;
      lrdi.setPosition(offset_to_row_data);


      if (!recordHeader.hasOverflow())
            {
                if (isHeadRow)
                {
                    if (fetchDesc != null && 
                        fetchDesc.getQualifierList() != null)
                    {
                        fetchDesc.reset();


                        if (!qualifyRecordFromSlot(
                                row, 
                                offset_to_row_data, 
                                fetchDesc,
                                recordHeader,
                                recordToLock))
                        {
                            return(false);
                        }
                        else
                        {
                            // reset position back for subsequent record read.
                            lrdi.setPosition(offset_to_row_data);
                        }
                    }
                }


                // call routine to do the real work.  Note that

View Full Code Here

                }
            }


            // position the array reading stream at beginning of row data 
            // just past the record header.
            ArrayInputStream lrdi = rawDataIn;
            lrdi.setPosition(offset_to_row_data);


            if (fetchDesc != null)
            {
                if (fetchDesc.getQualifierList() != null)
                {

View Full Code Here

     **/
  private void readPageHeader() 
        throws IOException
  {
    // these reads are always against the page array
    ArrayInputStream lrdi = rawDataIn;


    lrdi.setPosition(PAGE_HEADER_OFFSET);
    long spare;


    isOverflowPage  =  lrdi.readBoolean();
    setPageStatus    (lrdi.readByte());
    setPageVersion    (lrdi.readLong());
    slotsInUse      =  lrdi.readUnsignedShort();
    nextId          =  lrdi.readInt();
    generation      =  lrdi.readInt();     // page generation (Future Use)
    prevGeneration  =  lrdi.readInt();     // previous generation (Future Use)
    bipLocation     =  lrdi.readLong();  // BIPage location (Future Use)


    // number of deleted rows on page, we start to store this release 2.0.
    // for upgrade reasons, a 0 on disk means -1, so, we subtract one here.
    deletedRowCount =  lrdi.readUnsignedShort() - 1;


        // the next 4 (total 22 bytes) are reserved for future
    spare           =   lrdi.readUnsignedShort();  
    spare           =   lrdi.readInt();     // used by encryption
    spare           =   lrdi.readLong();
    spare           =   lrdi.readLong();
  }

View Full Code Here

        {
      SanityManager.ASSERT(getRecordOffset(slot) != 0);
    }


    // these reads are always against the page array
    ArrayInputStream lrdi = rawDataIn;


    lrdi.setPosition(
            slotTableOffsetToFirstRecordLengthField - (slot * slotEntrySize));


        return( 
            (slotFieldSize == SMALL_SLOT_SIZE) ?
                lrdi.readUnsignedShort() : lrdi.readInt());
  }

View Full Code Here

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org.apache.derby.impl.store.raw.log.FileLogger

org.apache.derby.impl.store.raw.log.LogToFile

org.apache.derbyTesting.unitTests.junit.ArrayInputStreamTest

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