Package com.vaadin.client.data

Class AbstractRemoteDataSource.RowHandleImpl

    • Constructor Detail

      • RowHandleImpl

        public RowHandleImpl​(T row,
                     Object key)

    • Method Detail

      • setRow

        public void setRow​(T row)
        A method for the data source to update the row data.
        Parameters:
        row - the updated row object

      • isPinned

        public boolean isPinned()

      • pin

        public void pin()
        Description copied from class: DataSource.RowHandle
        Marks this row as pinned.

        Note: Pinning a row multiple times requires an equal amount of unpins to free the row from the "pinned" status.

        Technical Note: Pinning a row makes sure that the row object for a particular set of data is always kept as up to date as the data source is able to. Since the DataSource might create a new instance of an object, object references aren't necessarily kept up-to-date. This is a technical work-around for that.

        Specified by:
        pin in class DataSource.RowHandle<T>
        See Also:
        DataSource.RowHandle.unpin()

      • unpin

        public void unpin()
           throws IllegalStateException
        Description copied from class: DataSource.RowHandle
        Marks this row as unpinned.

        Note: Pinning a row multiple times requires an equal amount of unpins to free the row from the "pinned" status.

        Technical Note: Pinning a row makes sure that the row object for a particular set of data is always kept as up to date as the data source is able to. Since the DataSource might create a new instance of an object, object references aren't necessarily kept up-to-date. This is a technical work-around for that.

        Specified by:
        unpin in class DataSource.RowHandle<T>
        Throws:
        IllegalStateException - if this row handle has not been pinned before
        See Also:
        DataSource.RowHandle.pin()

      • equalsExplicit

        protected boolean equalsExplicit​(Object obj)
        Description copied from class: DataSource.RowHandle
        An explicit override for Object.equals(Object). This method should be functionally equivalent to a properly implemented equals method.

        Having a properly implemented equals method is imperative for RowHandle to function. Because Java has no mechanism to force an override of an existing method, we're defining a new method for that instead.

        Specified by:
        equalsExplicit in class DataSource.RowHandle<T>
        Parameters:
        obj - the reference object with which to compare
        Returns:
        true if this object is the same as the obj argument; false otherwise.

      • hashCodeExplicit

        protected int hashCodeExplicit()
        Description copied from class: DataSource.RowHandle
        An explicit override for Object.hashCode(). This method should be functionally equivalent to a properly implemented hashCode method.

        Having a properly implemented hashCode method is imperative for RowHandle to function. Because Java has no mechanism to force an override of an existing method, we're defining a new method for that instead.

        Specified by:
        hashCodeExplicit in class DataSource.RowHandle<T>
        Returns:
        a hash code value for this object