Package org.apache.cayenne
Interface DataChannelQueryFilter
- All Known Subinterfaces:
- DataChannelFilter
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface DataChannelQueryFilter
An interface of a filter that allows to intercept DataChannel query operations.
 Query filters allow to implement chains of custom processors around a DataChannel.
 
Example:
 public class MyQueryFilter implements DataChannelQueryFilter {
     public QueryResponse onQuery(ObjectContext originatingContext, Query query,
                                  DataChannelQueryFilterChain filterChain) {
         System.out.println("Do something before query");
         // process query or return some custom response
         QueryResponse response = filterChain.onQuery(originatingContext, query);
         System.out.println("Do something after query");
         return response;
     }
 }- Since:
- 4.1
- See Also:
- DataChannelSyncFilter,- ServerModule.contributeDomainQueryFilters(org.apache.cayenne.di.Binder)
- 
Method SummaryModifier and Type Method Description QueryResponseonQuery(ObjectContext originatingContext, Query query, DataChannelQueryFilterChain filterChain)
- 
Method Details- 
onQueryQueryResponse onQuery(ObjectContext originatingContext, Query query, DataChannelQueryFilterChain filterChain)- Parameters:
- originatingContext- originating context of query
- query- that is processed
- filterChain- chain of query filters to invoke after this filter
- Returns:
- query response
 
 
-