80 lines
2.4 KiB
Java
80 lines
2.4 KiB
Java
package it.cavallium.dbengine.database.collections;
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.serialization.Serializer;
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import it.cavallium.dbengine.database.serialization.SerializerFixedBinaryLength;
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import java.util.Map;
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import java.util.function.Function;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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@SuppressWarnings("unused")
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public class SubStageGetterHashMap<T, U, TH> implements
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SubStageGetter<Map<T, U>, DatabaseMapDictionaryHashed<T, U, TH>> {
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private static final boolean assertsEnabled;
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static {
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boolean assertsEnabledTmp = false;
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//noinspection AssertWithSideEffects
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assert assertsEnabledTmp = true;
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//noinspection ConstantConditions
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assertsEnabled = assertsEnabledTmp;
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}
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private final Serializer<T, byte[]> keySerializer;
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private final Serializer<U, byte[]> valueSerializer;
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private final Function<T, TH> keyHashFunction;
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private final SerializerFixedBinaryLength<TH, byte[]> keyHashSerializer;
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public SubStageGetterHashMap(Serializer<T, byte[]> keySerializer,
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Serializer<U, byte[]> valueSerializer,
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Function<T, TH> keyHashFunction,
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SerializerFixedBinaryLength<TH, byte[]> keyHashSerializer) {
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this.keySerializer = keySerializer;
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this.valueSerializer = valueSerializer;
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this.keyHashFunction = keyHashFunction;
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this.keyHashSerializer = keyHashSerializer;
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}
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@Override
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public Mono<DatabaseMapDictionaryHashed<T, U, TH>> subStage(LLDictionary dictionary,
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@Nullable CompositeSnapshot snapshot,
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byte[] prefixKey,
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Flux<byte[]> debuggingKeyFlux) {
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Mono<DatabaseMapDictionaryHashed<T, U, TH>> result = Mono.just(DatabaseMapDictionaryHashed.tail(dictionary,
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prefixKey,
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keySerializer,
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valueSerializer,
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keyHashFunction,
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keyHashSerializer
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));
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if (assertsEnabled) {
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return checkKeyFluxConsistency(prefixKey, debuggingKeyFlux).then(result);
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} else {
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return result;
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}
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}
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@Override
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public boolean isMultiKey() {
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return true;
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}
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@Override
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public boolean needsDebuggingKeyFlux() {
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return assertsEnabled;
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}
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private Mono<Void> checkKeyFluxConsistency(byte[] prefixKey, Flux<byte[]> keyFlux) {
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return keyFlux.doOnNext(key -> {
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assert key.length == prefixKey.length + getKeyHashBinaryLength();
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}).then();
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}
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public int getKeyHashBinaryLength() {
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return keyHashSerializer.getSerializedBinaryLength();
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}
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}
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