示例#1
0
 /**
  * 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);
   }
 }
示例#2
0
 /**
  * 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);
   }
 }
示例#3
0
 /**
  * Create an independent copy of this temporary value. The file will not be deleted automatically.
  *
  * @return the value
  */
 @Override
 public ValueLob copyToTemp() {
   ValueLob lob;
   if (type == CLOB) {
     lob = ValueLob.createClob(getReader(), precision, handler);
   } else {
     lob = ValueLob.createBlob(getInputStream(), precision, handler);
   }
   return lob;
 }
示例#4
0
 @Override
 public Value convertPrecision(long precision, boolean force) {
   if (this.precision <= precision) {
     return this;
   }
   ValueLob lob;
   if (type == CLOB) {
     lob = ValueLob.createClob(getReader(), precision, handler);
   } else {
     lob = ValueLob.createBlob(getInputStream(), precision, handler);
   }
   return lob;
 }
示例#5
0
 /**
  * Convert a lob to another data type. The data is fully read in memory except when converting to
  * BLOB or CLOB.
  *
  * @param t the new type
  * @return the converted value
  */
 @Override
 public Value convertTo(int t) {
   if (t == type) {
     return this;
   } else if (t == Value.CLOB) {
     ValueLob copy = ValueLob.createClob(getReader(), -1, handler);
     return copy;
   } else if (t == Value.BLOB) {
     ValueLob copy = ValueLob.createBlob(getInputStream(), -1, handler);
     return copy;
   }
   return super.convertTo(t);
 }
示例#6
0
 private static ValueLob copy(ValueLob lob) {
   ValueLob copy =
       new ValueLob(
           lob.type,
           lob.handler,
           lob.fileName,
           lob.tableId,
           lob.objectId,
           lob.linked,
           lob.precision,
           lob.compressed);
   copy.small = lob.small;
   copy.hash = lob.hash;
   return copy;
 }
示例#7
0
 @Override
 public Value link(DataHandler h, int tabId) {
   if (fileName == null) {
     this.tableId = tabId;
     return this;
   }
   if (linked) {
     ValueLob copy = ValueLob.copy(this);
     copy.objectId = getNewObjectId(h);
     copy.tableId = tabId;
     String live = getFileName(h, copy.tableId, copy.objectId);
     copyFileTo(h, fileName, live);
     copy.fileName = live;
     copy.linked = true;
     return copy;
   }
   if (!linked) {
     this.tableId = tabId;
     String live = getFileName(h, tableId, objectId);
     if (tempFile != null) {
       tempFile.stopAutoDelete();
       tempFile = null;
     }
     renameFile(h, fileName, live);
     fileName = live;
     linked = true;
   }
   return this;
 }