Package io.github.pellse.assembler

Interface Assembler<T,​RC>

  • Type Parameters:
    T - Type for Top Level Entity e.g. Customer
    RC - Output Type e.g. Stream<Transaction> or Flux<Transaction>
    All Known Implementing Classes:
    AssemblerBuilder.AssemblerImpl
    public interface Assembler<T,​RC>

    • Method Summary

      All Methods Static Methods Instance Methods Abstract Methods Default Methods 
      Modifier and Type Method Description
      default RC assemble​(java.lang.Iterable<T> topLevelEntities)  
      RC assembleFromSupplier​(io.github.pellse.util.function.checked.CheckedSupplier<java.lang.Iterable<T>,​java.lang.Throwable> topLevelEntitiesProvider)  
      static <T,​ID,​R,​RC>
      RC      		 assembleFromSupplier​(io.github.pellse.util.function.checked.CheckedSupplier<java.lang.Iterable<T>,​java.lang.Throwable> topLevelEntitiesProvider, java.util.function.Function<T,​ID> idExtractor, java.util.List<io.github.pellse.util.query.Mapper<ID,​?,​?>> subQueryMappers, java.util.function.BiFunction<T,​java.lang.Object[],​R> aggregationFunction, AssemblerAdapter<T,​ID,​R,​RC> assemblerAdapter, java.util.function.Function<java.lang.Throwable,​java.lang.RuntimeException> errorConverter)  
      static <T,​ID>
      java.util.stream.Stream<java.util.function.Supplier<java.util.Map<ID,​?>>>      		 buildSubQueryMapperSources​(java.lang.Iterable<T> topLevelEntities, java.util.function.Function<T,​ID> idExtractor, java.util.List<io.github.pellse.util.query.Mapper<ID,​?,​?>> subQueryMappers, java.util.function.Function<java.lang.Throwable,​java.lang.RuntimeException> errorConverter)  

    • Method Detail

      • assemble

        default RC assemble​(java.lang.Iterable<T> topLevelEntities)

      • assembleFromSupplier

        RC assembleFromSupplier​(io.github.pellse.util.function.checked.CheckedSupplier<java.lang.Iterable<T>,​java.lang.Throwable> topLevelEntitiesProvider)

      • assembleFromSupplier

        static <T,​ID,​R,​RC> RC assembleFromSupplier​(io.github.pellse.util.function.checked.CheckedSupplier<java.lang.Iterable<T>,​java.lang.Throwable> topLevelEntitiesProvider,
                                                             java.util.function.Function<T,​ID> idExtractor,
                                                             java.util.List<io.github.pellse.util.query.Mapper<ID,​?,​?>> subQueryMappers,
                                                             java.util.function.BiFunction<T,​java.lang.Object[],​R> aggregationFunction,
                                                             AssemblerAdapter<T,​ID,​R,​RC> assemblerAdapter,
                                                             java.util.function.Function<java.lang.Throwable,​java.lang.RuntimeException> errorConverter)
        Type Parameters:
        T - e.g. <Customer>
        ID - e.g. <Long>
        R - e.g. <Transaction>
        RC - e.g. Stream<Transaction> or Flux<Transaction>
        Parameters:
        topLevelEntitiesProvider - e.g. () -> List<Customer>
        idExtractor - e.g. Customer::getCustomerId
        subQueryMappers - e.g. [ Mapper<Long, BillingInfo>, Mapper<Long, List<OrderItem>> ]
        aggregationFunction - e.g. buildTransaction(customer, [ billingInfo, orderItemList ])
        assemblerAdapter - Pluggable execution engine for invoking top and sub queries (e.g. Project Reactor, RxJava)
        errorConverter - Converts any exception thrown into a user defined RuntimeException
        Returns:
        A list of aggregated objects e.g. Stream<Transaction> or Flux<Transaction> as specified by the assemblerAdapter return type

      • buildSubQueryMapperSources

        static <T,​ID> java.util.stream.Stream<java.util.function.Supplier<java.util.Map<ID,​?>>> buildSubQueryMapperSources​(java.lang.Iterable<T> topLevelEntities,
                                                                                                                               java.util.function.Function<T,​ID> idExtractor,
                                                                                                                               java.util.List<io.github.pellse.util.query.Mapper<ID,​?,​?>> subQueryMappers,
                                                                                                                               java.util.function.Function<java.lang.Throwable,​java.lang.RuntimeException> errorConverter)