Class LobDataFetchOnDemand


  • public final class LobDataFetchOnDemand
    extends LobData
    A implementation of the LOB data used on the client side of a remote H2 connection. Fetches the underlying on data from the server.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private SessionRemote handler  
      protected byte[] hmac
      If this is a client-side ValueLobDb object returned by a ResultSet, the hmac acts a security cookie that the client can send back to the server to ask for data related to this LOB.
      private long lobId  
      private int tableId
      If the LOB is managed by the one the LobStorageBackend classes, these are the unique key inside that storage.
    • Field Detail

      • tableId

        private final int tableId
        If the LOB is managed by the one the LobStorageBackend classes, these are the unique key inside that storage.
      • lobId

        private final long lobId
      • hmac

        protected final byte[] hmac
        If this is a client-side ValueLobDb object returned by a ResultSet, the hmac acts a security cookie that the client can send back to the server to ask for data related to this LOB.
    • Constructor Detail

      • LobDataFetchOnDemand

        public LobDataFetchOnDemand​(DataHandler handler,
                                    int tableId,
                                    long lobId,
                                    byte[] hmac)
    • Method Detail

      • isLinkedToTable

        public boolean isLinkedToTable()
        Check if this value is linked to a specific table. For values that are kept fully in memory, this method returns false.
        Overrides:
        isLinkedToTable in class LobData
        Returns:
        true if it is
      • getTableId

        public int getTableId()
        Get the current table id of this lob.
        Returns:
        the table id
      • getLobId

        public long getLobId()
      • getInputStream

        public java.io.InputStream getInputStream​(long precision)
        Description copied from class: LobData
        Get stream to read LOB data from
        Specified by:
        getInputStream in class LobData
        Parameters:
        precision - octet length of the stream, or -1 if unknown
        Returns:
        stream to read LOB data from
      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object