Package org.apache.cayenne
Interface DataChannelQueryFilter
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- 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)
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description QueryResponse
onQuery(ObjectContext originatingContext, Query query, DataChannelQueryFilterChain filterChain)
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Method Detail
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onQuery
QueryResponse onQuery(ObjectContext originatingContext, Query query, DataChannelQueryFilterChain filterChain)
- Parameters:
originatingContext
- originating context of queryquery
- that is processedfilterChain
- chain of query filters to invoke after this filter- Returns:
- query response
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