org.firebirdsql.gds.ng.wire

## Class AbstractFbWireBlob

- java.lang.Object
- - org.firebirdsql.gds.ng.AbstractFbBlob
  - - org.firebirdsql.gds.ng.wire.AbstractFbWireBlob

- All Implemented Interfaces:
    java.lang.AutoCloseable, FbBlob, DatabaseListener, ExceptionListenable, TransactionListener, FbWireBlob
  Direct Known Subclasses:
    AbstractFbWireInputBlob, AbstractFbWireOutputBlob

      public abstract class AbstractFbWireBlob
      extends AbstractFbBlob
      implements FbWireBlob

  Since:
    3.0
  Author:
    Mark Rotteveel

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.firebirdsql.gds.ng.FbBlob

      `FbBlob.SeekMode`

  - ### Field Summary

    - ### Fields inherited from class org.firebirdsql.gds.ng.AbstractFbBlob

      `exceptionListenerDispatcher`

    - ### Fields inherited from interface org.firebirdsql.gds.ng.FbBlob

      `NO_BLOB_ID`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `AbstractFbWireBlob(FbWireDatabase database, FbWireTransaction transaction, BlobParameterBuffer blobParameterBuffer)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `cancelImpl()` Internal implementation of `AbstractFbBlob.cancel()`.
    `protected void` | `closeImpl()` Internal implementation of `AbstractFbBlob.close()`.
    `byte[]` | `getBlobInfo(byte[] requestItems, int bufferLength)` Request blob info.
    `FbWireDatabase` | `getDatabase()`
    `int` | `getHandle()`
    `protected void` | `releaseBlob(int releaseOperation)` Release this blob with the specified operation.
    `protected void` | `releaseResources()` Release Java resources held.
    `protected void` | `setHandle(int blobHandle)`

    - ### Methods inherited from class org.firebirdsql.gds.ng.AbstractFbBlob

      `addExceptionListener, cancel, checkBlobClosed, checkBlobOpen, checkDatabaseAttached, checkTransactionActive, clearDatabase, clearTransaction, close, createBlobLengthProcessor, detached, detaching, getBlobInfo, getBlobParameterBuffer, getMaximumSegmentSize, getSynchronizationObject, getTransaction, isEndingTransaction, isEof, isOpen, length, removeExceptionListener, resetEof, setEof, setOpen, transactionStateChanged, warningReceived`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.firebirdsql.gds.ng.FbBlob

      `cancel, close, getBlobId, getBlobInfo, getMaximumSegmentSize, getSegment, getSynchronizationObject, isEof, isOpen, isOutput, length, open, putSegment, seek`

    - ### Methods inherited from interface org.firebirdsql.gds.ng.listeners.ExceptionListenable

      `addExceptionListener, removeExceptionListener`

- - ### Constructor Detail

    - #### AbstractFbWireBlob

          protected AbstractFbWireBlob(FbWireDatabase database,
                                       FbWireTransaction transaction,
                                       BlobParameterBuffer blobParameterBuffer)

  - ### Method Detail

    - #### getDatabase

          public FbWireDatabase getDatabase()

      Specified by:
        `getDatabase` in interface `FbBlob`
      Overrides:
        `getDatabase` in class `AbstractFbBlob`
      Returns:
        The database connection that created this blob

    - #### getHandle

          public final int getHandle()

      Specified by:
        `getHandle` in interface `FbBlob`
      Returns:
        The Firebird blob handle identifier

    - #### setHandle

          protected final void setHandle(int blobHandle)

      Parameters:
        `blobHandle` - The Firebird blob handle identifier

    - #### releaseBlob

          protected void releaseBlob(int releaseOperation)
                              throws java.sql.SQLException

      Release this blob with the specified operation.

      Implementations should only do the operation and not perform any further clean up or checks on attached database and active transaction, as those checks and clean up should be done by the caller.

      Parameters:
        `releaseOperation` - Either `WireProtocolConstants.op_close_blob` or `WireProtocolConstants.op_cancel_blob`
      Throws:
        `java.sql.SQLException` - For database communication errors.

    - #### closeImpl

          protected void closeImpl()
                            throws java.sql.SQLException

      Description copied from class: `AbstractFbBlob`
      Internal implementation of `AbstractFbBlob.close()`. The implementation does not need to check for attached database and active transaction, nor does it need to mark this blob as closed.
      Specified by:
        `closeImpl` in class `AbstractFbBlob`
      Throws:
        `java.sql.SQLException`

    - #### cancelImpl

          protected void cancelImpl()
                             throws java.sql.SQLException

      Description copied from class: `AbstractFbBlob`
      Internal implementation of `AbstractFbBlob.cancel()`. The implementation does not need to check for attached database and active transaction, nor does it need to mark this blob as closed.
      Specified by:
        `cancelImpl` in class `AbstractFbBlob`
      Throws:
        `java.sql.SQLException`

    - #### releaseResources

          protected void releaseResources()

      Description copied from class: `AbstractFbBlob`
      Release Java resources held. This should not communicate with the Firebird server.
      Specified by:
        `releaseResources` in class `AbstractFbBlob`

    - #### getBlobInfo

          public byte[] getBlobInfo(byte[] requestItems,
                                    int bufferLength)
                             throws java.sql.SQLException

      Description copied from interface: `FbBlob`
      Request blob info.
      Specified by:
        `getBlobInfo` in interface `FbBlob`
      Parameters:
        `requestItems` - Array of info items to request
        `bufferLength` - Response buffer length to use
      Returns:
        Response buffer
      Throws:
        `java.sql.SQLException`

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