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

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

Method Details

assemble

default RC assemble(Iterable<T> topLevelEntities)

assembleFromSupplier

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

assembleFromSupplier

static <T,
ID,
R,
RC> RC assembleFromSupplier(io.github.pellse.util.function.checked.CheckedSupplier<Iterable<T>,Throwable> topLevelEntitiesProvider,
 Function<T,ID> idExtractor,
 List<io.github.pellse.util.query.Mapper<ID,?,?>> subQueryMappers,
 BiFunction<T,Object[],R> aggregationFunction,
 AssemblerAdapter<T,ID,R,RC> assemblerAdapter,
 Function<Throwable,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> Stream<Supplier<Map<ID,?>>> buildSubQueryMapperSources(Iterable<T> topLevelEntities,
 Function<T,ID> idExtractor,
 List<io.github.pellse.util.query.Mapper<ID,?,?>> subQueryMappers,
 Function<Throwable,RuntimeException> errorConverter)