This class provides a hint for the operation performed by a {@link org.apache.beehive.netui.databinding.datagrid.api.filter.Filter} instance. Thefilter operations supported for a specific query language are not encoded in the FilterOperation class and are provided on an per-instance basis. The hint provides a way of representing a generic type of operation. The operations here are common across query languages and are not meant to be an exhaustive list.
Setting a FilterOperationHint on a Filter object, allows query infrastructure to generically interact with Filter instances regardless of the type of query mechanism.
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