A ChildRowDataProvider that provides child row data from Liberator containers. This class does not directly implement the caplin.grid.dataprovider.expandable.ChildRowDataProvider interface but instead subclasses caplin.grid.dataprovider.expandable.WrappedChildRowDataProvider.

Due to the complexity of child row data provision this data provider is configured via a separate class. The class is instantiated by the child row data provider and is specified via the "config" attribute in the childRowDataProvider tag in the grid definition.

<childRowDataProvider class="caplin.grid.dataprovider.expandable.ContainerChildRowDataProvider" config="caplinx.grid.dataprovider.expandable.ContainerChildRowConfig"/>

This class (caplinx.grid.dataprovider.expandable.ContainerChildRowConfig in the above case) configures which container to request (getContainerToExpanded method), which fields to request for the child row container (getFieldsToRequest method) and allows the mapping of child row data to different field names (mapUpdateFieldsToCurrentGridFields method).

The getContainerToExpanded method of the config class is passed in a map mRowData of the parent row data and the parent row id sParentSubjectId, the getFieldsToRequest is passed in the GridColumnModel and the mapUpdateFieldsToCurrentGridFields method is called with the mRecordUpdates map of every update to allow the mapping of values to different fields. This can be useful when a child container has a field names that do not match a parent one and therefore needs to be changed before being passed to the grid. For instance a child container has an "orderID" field but the underlying container instead uses a "tradeId" column, this method allows the config class to return a map with the "orderId" value moved to a "tradeId" field.