Exemplo n.º 1
0
 /**
  * Create a temporary CLOB value from a stream.
  *
  * @param in the reader
  * @param length the number of characters to read, or -1 for no limit
  * @param handler the data handler
  * @return the lob value
  */
 public static ValueLobDb createTempClob(Reader in, long length, DataHandler handler) {
   BufferedReader reader;
   if (in instanceof BufferedReader) {
     reader = (BufferedReader) in;
   } else {
     reader = new BufferedReader(in, Constants.IO_BUFFER_SIZE);
   }
   try {
     boolean compress = handler.getLobCompressionAlgorithm(Value.CLOB) != null;
     long remaining = Long.MAX_VALUE;
     if (length >= 0 && length < remaining) {
       remaining = length;
     }
     int len = getBufferSize(handler, compress, remaining);
     char[] buff;
     if (len >= Integer.MAX_VALUE) {
       String data = IOUtils.readStringAndClose(reader, -1);
       buff = data.toCharArray();
       len = buff.length;
     } else {
       buff = new char[len];
       reader.mark(len);
       len = IOUtils.readFully(reader, buff, len);
     }
     if (len <= handler.getMaxLengthInplaceLob()) {
       byte[] small = new String(buff, 0, len).getBytes(Constants.UTF8);
       return ValueLobDb.createSmallLob(Value.CLOB, small, len);
     }
     reader.reset();
     ValueLobDb lob = new ValueLobDb(handler, reader, remaining);
     return lob;
   } catch (IOException e) {
     throw DbException.convertIOException(e, null);
   }
 }
Exemplo n.º 2
0
 /**
  * Create a temporary BLOB value from a stream.
  *
  * @param in the input stream
  * @param length the number of characters to read, or -1 for no limit
  * @param handler the data handler
  * @return the lob value
  */
 public static ValueLobDb createTempBlob(InputStream in, long length, DataHandler handler) {
   try {
     long remaining = Long.MAX_VALUE;
     boolean compress = handler.getLobCompressionAlgorithm(Value.BLOB) != null;
     if (length >= 0 && length < remaining) {
       remaining = length;
     }
     int len = getBufferSize(handler, compress, remaining);
     byte[] buff;
     if (len >= Integer.MAX_VALUE) {
       buff = IOUtils.readBytesAndClose(in, -1);
       len = buff.length;
     } else {
       buff = DataUtils.newBytes(len);
       len = IOUtils.readFully(in, buff, len);
     }
     if (len <= handler.getMaxLengthInplaceLob()) {
       byte[] small = DataUtils.newBytes(len);
       System.arraycopy(buff, 0, small, 0, len);
       return ValueLobDb.createSmallLob(Value.BLOB, small, small.length);
     }
     ValueLobDb lob = new ValueLobDb(handler, buff, len, in, remaining);
     return lob;
   } catch (IOException e) {
     throw DbException.convertIOException(e, null);
   }
 }
Exemplo n.º 3
0
 @Override
 public Value copy(DataHandler database, int tableId) {
   if (small == null) {
     Value v2 = handler.getLobStorage().copyLob(this, tableId, getPrecision());
     return v2;
   } else if (small.length > database.getMaxLengthInplaceLob()) {
     LobStorageInterface s = database.getLobStorage();
     Value v;
     if (type == Value.BLOB) {
       v = s.createBlob(getInputStream(), getPrecision());
     } else {
       v = s.createClob(getReader(), getPrecision());
     }
     Value v2 = v.copy(database, tableId);
     v.remove();
     return v2;
   }
   return this;
 }
Exemplo n.º 4
0
 private static int getBufferSize(DataHandler handler, boolean compress, long remaining) {
   if (remaining < 0 || remaining > Integer.MAX_VALUE) {
     remaining = Integer.MAX_VALUE;
   }
   int inplace = handler.getMaxLengthInplaceLob();
   long m = compress ? Constants.IO_BUFFER_SIZE_COMPRESS : Constants.IO_BUFFER_SIZE;
   if (m < remaining && m <= inplace) {
     // using "1L" to force long arithmetic because
     // inplace could be Integer.MAX_VALUE
     m = Math.min(remaining, inplace + 1L);
     // the buffer size must be bigger than the inplace lob, otherwise we
     // can't know if it must be stored in-place or not
     m = MathUtils.roundUpLong(m, Constants.IO_BUFFER_SIZE);
   }
   m = Math.min(remaining, m);
   m = MathUtils.convertLongToInt(m);
   if (m < 0) {
     m = Integer.MAX_VALUE;
   }
   return (int) m;
 }