Package org.h2.store

Interface LobStorageInterface

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      ValueLob copyLob​(ValueLob old, int tableId)
      Copy a lob.
      ValueBlob createBlob​(java.io.InputStream in, long maxLength)
      Create a BLOB object.
      ValueClob createClob​(java.io.Reader reader, long maxLength)
      Create a CLOB object.
      java.io.InputStream getInputStream​(long lobId, int tableId, long byteCount)
      Get the input stream for the given lob
      java.io.InputStream getInputStream​(long lobId, long byteCount)
      Get the input stream for the given lob, only called on server side of a TCP connection.
      boolean isReadOnly()
      Whether the storage is read-only
      void removeAllForTable​(int tableId)
      Remove all LOBs for this table.
      void removeLob​(ValueLob lob)
      Delete a LOB (from the database, if it is stored there).

    • Method Detail

      • createClob

        ValueClob createClob​(java.io.Reader reader,
                     long maxLength)
        Create a CLOB object.
        Parameters:
        reader - the reader
        maxLength - the maximum length (-1 if not known)
        Returns:
        the LOB

      • createBlob

        ValueBlob createBlob​(java.io.InputStream in,
                     long maxLength)
        Create a BLOB object.
        Parameters:
        in - the input stream
        maxLength - the maximum length (-1 if not known)
        Returns:
        the LOB

      • copyLob

        ValueLob copyLob​(ValueLob old,
                 int tableId)
        Copy a lob.
        Parameters:
        old - the old lob
        tableId - the new table id
        Returns:
        the new lob

      • getInputStream

        java.io.InputStream getInputStream​(long lobId,
                                   long byteCount)
                            throws java.io.IOException
        Get the input stream for the given lob, only called on server side of a TCP connection.
        Parameters:
        lobId - the lob id
        byteCount - the number of bytes to read, or -1 if not known
        Returns:
        the stream
        Throws:
        java.io.IOException - on failure

      • getInputStream

        java.io.InputStream getInputStream​(long lobId,
                                   int tableId,
                                   long byteCount)
                            throws java.io.IOException
        Get the input stream for the given lob
        Parameters:
        lobId - the lob id
        tableId - the able id
        byteCount - the number of bytes to read, or -1 if not known
        Returns:
        the stream
        Throws:
        java.io.IOException - on failure

      • removeLob

        void removeLob​(ValueLob lob)
        Delete a LOB (from the database, if it is stored there).
        Parameters:
        lob - the lob

      • removeAllForTable

        void removeAllForTable​(int tableId)
        Remove all LOBs for this table.
        Parameters:
        tableId - the table id

      • isReadOnly

        boolean isReadOnly()
        Whether the storage is read-only
        Returns:
        true if yes