Examples of LobCreator

org.hibernate.engine.jdbc.LobCreator
Contract for creating various LOB references. @author Steve Ebersole @author Gail Badner
org.springframework.jdbc.support.lob.LobCreator
Interface that abstracts potentially database-specific creation of large binary fields and large text fields. Does not work with java.sql.Blob and java.sql.Clob instances in the API, as some JDBC drivers do not support these types as such.
The LOB creation part is where {@link LobHandler} implementations usuallydiffer. Possible strategies include usage of PreparedStatement.setBinaryStream/setCharacterStream but also PreparedStatement.setBlob/setClob with either a stream argument (requires JDBC 4.0) or java.sql.Blob/Clob wrapper objects.
A LobCreator represents a session for creating BLOBs: It is not thread-safe and needs to be instantiated for each statement execution or for each transaction. Each LobCreator needs to be closed after completion.
For convenient working with a PreparedStatement and a LobCreator, consider using {@link org.springframework.jdbc.core.JdbcTemplate} with an{@link org.springframework.jdbc.core.support.AbstractLobCreatingPreparedStatementCallback}implementation. See the latter's javadoc for details. @author Juergen Hoeller @since 04.12.2003 @see #close() @see LobHandler#getLobCreator() @see DefaultLobHandler.DefaultLobCreator @see OracleLobHandler.OracleLobCreator @see java.sql.PreparedStatement#setBlob @see java.sql.PreparedStatement#setClob @see java.sql.PreparedStatement#setBytes @see java.sql.PreparedStatement#setBinaryStream @see java.sql.PreparedStatement#setString @see java.sql.PreparedStatement#setAsciiStream @see java.sql.PreparedStatement#setCharacterStream

Examples of org.hibernate.engine.jdbc.LobCreator

        fail( "Unexpeted call to getConnection" );
        return null;
      }
    };


    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( null ).getLobCreator( lobCreationContext );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof NClobImplementer );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


  }

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Examples of org.hibernate.engine.jdbc.LobCreator

          throw new RuntimeException( "Unexpected SQLException", e );
        }
      }
    };


    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( connection ).getLobCreator( lobCreationContext );
    assertTrue( lobCreator instanceof ContextualLobCreator );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof JdbcBlob );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof JdbcClob );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof JdbcNClob );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


    blob.free();
    clob.free();
    nclob.free();

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Examples of org.hibernate.engine.jdbc.LobCreator

          throw new RuntimeException( "Unexpected SQLException", e );
        }
      }
    };


    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( connection ).getLobCreator( lobCreationContext );
    assertTrue( lobCreator instanceof NonContextualLobCreator );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof ClobImplementer );
    assertTrue( nclob instanceof NClobImplementer );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


    blob.free();
    clob.free();
    nclob.free();

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Examples of org.hibernate.engine.jdbc.LobCreator

    nclob.free();
    connection.close();
  }


  public void testLegacyLobCreator() throws SQLException {
    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( null ).getLobCreator();


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof NClobImplementer );
    assertTrue( NClob.class.isInstance( nclob ) );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


    blob.free();
    clob.free();
    nclob.free();

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Examples of org.hibernate.engine.jdbc.LobCreator

  }


  private LobCreationContextImpl lobCreationContext = new LobCreationContextImpl();


  public void testLobCreator() throws ClassNotFoundException, SQLException {
    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( null ).getLobCreator( lobCreationContext );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof NClobImplementer );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );
  }

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Examples of org.hibernate.engine.jdbc.LobCreator

    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );
  }


  public void testLobAccess() throws SQLException {
    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( null ).getLobCreator( lobCreationContext );


    Blob blob = lobCreator.createBlob( "Hi".getBytes() );
    assertEquals( 2, blob.length() );
    assertEquals( 2, blob.getBytes( 1, 5 ).length );
    blob.getBinaryStream();


    Clob clob = lobCreator.createClob( "Hi" );
    assertEquals( 2, clob.length() );
    assertEquals( 2, clob.getSubString( 1, 5 ).length() );
    clob.getCharacterStream();
    clob.getAsciiStream();
  }

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Examples of org.hibernate.engine.jdbc.LobCreator

          throw new RuntimeException( "Unexpected SQLException", e );
        }
      }
    };


    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( connection ).getLobCreator( lobCreationContext );
    assertTrue( lobCreator instanceof ContextualLobCreator );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof JdbcBlob );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof JdbcClob );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof JdbcNClob );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


    blob.free();
    clob.free();
    nclob.free();

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Examples of org.hibernate.engine.jdbc.LobCreator

          throw new RuntimeException( "Unexpected SQLException", e );
        }
      }
    };


    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( connection ).getLobCreator( lobCreationContext );
    assertTrue( lobCreator instanceof NonContextualLobCreator );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof ClobImplementer );
    assertTrue( nclob instanceof NClobImplementer );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


    blob.free();
    clob.free();
    nclob.free();

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Examples of org.hibernate.engine.jdbc.LobCreator

    nclob.free();
    connection.close();
  }


  public void testLegacyLobCreator() throws SQLException {
    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( null ).getLobCreator();


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof NClobImplementer );
    assertTrue( NClob.class.isInstance( nclob ) );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


    blob.free();
    clob.free();
    nclob.free();

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Examples of org.hibernate.engine.jdbc.LobCreator

        fail( "Unexpeted call to getConnection" );
        return null;
      }
    };


    LobCreator lobCreator = JdbcSupportLoader.loadJdbcSupport( null ).getLobCreator( lobCreationContext );


    Blob blob = lobCreator.createBlob( new byte[] {} );
    assertTrue( blob instanceof BlobImplementer );
    blob = lobCreator.wrap( blob );
    assertTrue( blob instanceof WrappedBlob );


    Clob clob = lobCreator.createClob( "Hi" );
    assertTrue( clob instanceof ClobImplementer );
    clob = lobCreator.wrap( clob );
    assertTrue( clob instanceof WrappedClob );


    Clob nclob = lobCreator.createNClob( "Hi" );
    assertTrue( nclob instanceof NClobImplementer );
    nclob = lobCreator.wrap( nclob );
    assertTrue( nclob instanceof WrappedClob );


  }

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