127 lines
3.7 KiB
Java
127 lines
3.7 KiB
Java
package it.cavallium.dbengine.client;
|
|
|
|
import io.net5.buffer.api.Drop;
|
|
import io.net5.buffer.api.Owned;
|
|
import io.net5.buffer.api.Send;
|
|
import it.cavallium.dbengine.client.query.current.data.TotalHitsCount;
|
|
import io.net5.buffer.api.internal.ResourceSupport;
|
|
import it.cavallium.dbengine.database.collections.ValueGetter;
|
|
import it.cavallium.dbengine.database.collections.ValueTransformer;
|
|
import java.util.function.Function;
|
|
import reactor.core.publisher.Flux;
|
|
import reactor.core.publisher.Mono;
|
|
import reactor.util.function.Tuples;
|
|
|
|
public final class Hits<T> extends ResourceSupport<Hits<T>, Hits<T>> {
|
|
|
|
private static final Drop<Hits<?>> DROP = new Drop<>() {
|
|
@Override
|
|
public void drop(Hits<?> obj) {
|
|
if (obj.onClose != null) {
|
|
obj.onClose.run();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Drop<Hits<?>> fork() {
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public void attach(Hits<?> obj) {
|
|
|
|
}
|
|
};
|
|
|
|
private Flux<T> results;
|
|
private TotalHitsCount totalHitsCount;
|
|
private Runnable onClose;
|
|
|
|
@SuppressWarnings({"unchecked", "rawtypes"})
|
|
public Hits(Flux<T> results, TotalHitsCount totalHitsCount, Runnable onClose) {
|
|
super((Drop<Hits<T>>) (Drop) DROP);
|
|
this.results = results;
|
|
this.totalHitsCount = totalHitsCount;
|
|
this.onClose = onClose;
|
|
}
|
|
|
|
public static <T> Hits<T> empty() {
|
|
return new Hits<>(Flux.empty(), TotalHitsCount.of(0, true), null);
|
|
}
|
|
|
|
public static <K, V> Hits<LazyHitEntry<K, V>> withValuesLazy(Hits<LazyHitKey<K>> hits,
|
|
ValueGetter<K, V> valuesGetter) {
|
|
var hitsEntry = hits.results().map(hitKey -> hitKey.withValue(valuesGetter::get));
|
|
|
|
return new Hits<>(hitsEntry, hits.totalHitsCount, hits::close);
|
|
}
|
|
|
|
public static <K, V> Hits<HitEntry<K, V>> withValues(Hits<HitKey<K>> hits, ValueGetter<K, V> valuesGetter) {
|
|
var hitsEntry = hits.results().flatMap(hitKey -> hitKey.withValue(valuesGetter::get));
|
|
|
|
return new Hits<>(hitsEntry, hits.totalHitsCount, hits::close);
|
|
}
|
|
|
|
public static <T, U> Function<Send<Hits<HitKey<T>>>, Send<Hits<LazyHitEntry<T, U>>>> generateMapper(
|
|
ValueGetter<T, U> valueGetter) {
|
|
return resultToReceive -> {
|
|
var result = resultToReceive.receive();
|
|
var hitsToTransform = result.results()
|
|
.map(hit -> new LazyHitEntry<>(Mono.just(hit.key()), valueGetter.get(hit.key()), hit.score()));
|
|
return new Hits<>(hitsToTransform, result.totalHitsCount(), result::close).send();
|
|
};
|
|
}
|
|
|
|
public static <T, U> Function<Send<Hits<HitKey<T>>>, Send<Hits<LazyHitEntry<T, U>>>> generateMapper(
|
|
ValueTransformer<T, U> valueTransformer) {
|
|
return resultToReceive -> {
|
|
var result = resultToReceive.receive();
|
|
var hitsToTransform = result.results().map(hit -> Tuples.of(hit.score(), hit.key()));
|
|
var transformed = valueTransformer
|
|
.transform(hitsToTransform)
|
|
.filter(tuple3 -> tuple3.getT3().isPresent())
|
|
.map(tuple3 -> new LazyHitEntry<>(Mono.just(tuple3.getT2()),
|
|
Mono.just(tuple3.getT3().orElseThrow()),
|
|
tuple3.getT1()
|
|
));
|
|
return new Hits<>(transformed, result.totalHitsCount(), result::close).send();
|
|
};
|
|
}
|
|
|
|
public Flux<T> results() {
|
|
return results;
|
|
}
|
|
|
|
public TotalHitsCount totalHitsCount() {
|
|
return totalHitsCount;
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "Hits[" + "results=" + results + ", " + "totalHitsCount=" + totalHitsCount + ']';
|
|
}
|
|
|
|
@Override
|
|
protected RuntimeException createResourceClosedException() {
|
|
return new IllegalStateException("Closed");
|
|
}
|
|
|
|
@Override
|
|
protected Owned<Hits<T>> prepareSend() {
|
|
var results = this.results;
|
|
var totalHitsCount = this.totalHitsCount;
|
|
var onClose = this.onClose;
|
|
return drop -> {
|
|
var instance = new Hits<>(results, totalHitsCount, onClose);
|
|
drop.attach(instance);
|
|
return instance;
|
|
};
|
|
}
|
|
|
|
protected void makeInaccessible() {
|
|
this.results = null;
|
|
this.totalHitsCount = null;
|
|
this.onClose = null;
|
|
}
|
|
}
|