コード例 #1
0
ファイル: ValueLob.java プロジェクト: zhoupan/Lealone
 /**
  * Create a 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
  */
 private static ValueLob createBlob(InputStream in, long length, DataHandler handler) {
   try {
     if (handler == null) {
       byte[] data = IOUtils.readBytesAndClose(in, (int) length);
       return createSmallLob(Value.BLOB, data);
     }
     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 ValueLob.createSmallLob(Value.BLOB, small);
     }
     ValueLob lob = new ValueLob(Value.BLOB, null);
     lob.createFromStream(buff, len, in, remaining, handler);
     return lob;
   } catch (IOException e) {
     throw DbException.convertIOException(e, null);
   }
 }
コード例 #2
0
ファイル: ValueLob.java プロジェクト: zhoupan/Lealone
 /**
  * Create a 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
  */
 private static ValueLob createClob(Reader in, long length, DataHandler handler) {
   try {
     if (handler == null) {
       String s = IOUtils.readStringAndClose(in, (int) length);
       return createSmallLob(Value.CLOB, s.getBytes(Constants.UTF8));
     }
     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(in, -1);
       buff = data.toCharArray();
       len = buff.length;
     } else {
       buff = new char[len];
       len = IOUtils.readFully(in, buff, len);
     }
     if (len <= handler.getMaxLengthInplaceLob()) {
       byte[] small = new String(buff, 0, len).getBytes(Constants.UTF8);
       return ValueLob.createSmallLob(Value.CLOB, small);
     }
     ValueLob lob = new ValueLob(Value.CLOB, null);
     lob.createFromReader(buff, len, in, remaining, handler);
     return lob;
   } catch (IOException e) {
     throw DbException.convertIOException(e, null);
   }
 }
コード例 #3
0
ファイル: ValueLob.java プロジェクト: zhoupan/Lealone
 /**
  * Store the lob data to a file if the size of the buffer is larger than the maximum size for an
  * in-place lob.
  *
  * @param h the data handler
  */
 public void convertToFileIfRequired(DataHandler h) {
   try {
     if (small != null && small.length > h.getMaxLengthInplaceLob()) {
       boolean compress = h.getLobCompressionAlgorithm(type) != null;
       int len = getBufferSize(h, compress, Long.MAX_VALUE);
       int tabId = tableId;
       if (type == Value.BLOB) {
         createFromStream(DataUtils.newBytes(len), 0, getInputStream(), Long.MAX_VALUE, h);
       } else {
         createFromReader(new char[len], 0, getReader(), Long.MAX_VALUE, h);
       }
       Value v2 = link(h, tabId);
       if (SysProperties.CHECK && v2 != this) {
         DbException.throwInternalError();
       }
     }
   } catch (IOException e) {
     throw DbException.convertIOException(e, null);
   }
 }
コード例 #4
0
ファイル: ValueLob.java プロジェクト: zhoupan/Lealone
 private void createFromStream(byte[] buff, int len, InputStream in, long remaining, DataHandler h)
     throws IOException {
   FileStoreOutputStream out = initLarge(h);
   boolean compress = h.getLobCompressionAlgorithm(Value.BLOB) != null;
   try {
     while (true) {
       precision += len;
       out.write(buff, 0, len);
       remaining -= len;
       if (remaining <= 0) {
         break;
       }
       len = getBufferSize(h, compress, remaining);
       len = IOUtils.readFully(in, buff, len);
       if (len <= 0) {
         break;
       }
     }
   } finally {
     out.close();
   }
 }
コード例 #5
0
ファイル: ValueLob.java プロジェクト: zhoupan/Lealone
 private void createFromReader(char[] buff, int len, Reader in, long remaining, DataHandler h)
     throws IOException {
   FileStoreOutputStream out = initLarge(h);
   boolean compress = h.getLobCompressionAlgorithm(Value.CLOB) != null;
   try {
     while (true) {
       precision += len;
       byte[] b = new String(buff, 0, len).getBytes(Constants.UTF8);
       out.write(b, 0, b.length);
       remaining -= len;
       if (remaining <= 0) {
         break;
       }
       len = getBufferSize(h, compress, remaining);
       len = IOUtils.readFully(in, buff, len);
       if (len == 0) {
         break;
       }
     }
   } finally {
     out.close();
   }
 }
コード例 #6
0
ファイル: ValueLob.java プロジェクト: zhoupan/Lealone
 private FileStoreOutputStream initLarge(DataHandler h) {
   this.handler = h;
   this.tableId = 0;
   this.linked = false;
   this.precision = 0;
   this.small = null;
   this.hash = 0;
   String compressionAlgorithm = h.getLobCompressionAlgorithm(type);
   this.compressed = compressionAlgorithm != null;
   synchronized (h) {
     String path = h.getDatabasePath();
     if ((path != null) && (path.length() == 0)) {
       path =
           new File(Utils.getProperty("java.io.tmpdir", "."), SysProperties.PREFIX_TEMP_FILE)
               .getAbsolutePath();
     }
     objectId = getNewObjectId(h);
     fileName = getFileNamePrefix(path, objectId) + Constants.SUFFIX_TEMP_FILE;
     tempFile = h.openFile(fileName, "rw", false);
     tempFile.autoDelete();
   }
   FileStoreOutputStream out = new FileStoreOutputStream(tempFile, h, compressionAlgorithm);
   return out;
 }