79 lines
2.4 KiB
Java
79 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.SerializerFixedBinaryLength;
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import java.util.Map;
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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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public class SubStageGetterMapDeep<T, U, US extends DatabaseStage<U>> implements SubStageGetter<Map<T, U>, DatabaseMapDictionaryDeep<T, U, US>> {
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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 SubStageGetter<U, US> subStageGetter;
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private final SerializerFixedBinaryLength<T, byte[]> keySerializer;
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private final int keyExtLength;
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public SubStageGetterMapDeep(SubStageGetter<U, US> subStageGetter,
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SerializerFixedBinaryLength<T, byte[]> keySerializer,
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int keyExtLength) {
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this.subStageGetter = subStageGetter;
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this.keySerializer = keySerializer;
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this.keyExtLength = keyExtLength;
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assert keyExtConsistency();
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}
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private boolean keyExtConsistency() {
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if (subStageGetter instanceof SubStageGetterMapDeep) {
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return keyExtLength == ((SubStageGetterMapDeep<?, ?, ?>) subStageGetter).getKeyBinaryLength();
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} else if (subStageGetter instanceof SubStageGetterMap) {
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return keyExtLength == ((SubStageGetterMap<?, ?>) subStageGetter).getKeyBinaryLength();
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} else {
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return true;
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}
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}
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@Override
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public Mono<DatabaseMapDictionaryDeep<T, U, US>> subStage(LLDictionary dictionary,
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@Nullable CompositeSnapshot snapshot,
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byte[] prefixKey,
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Flux<byte[]> keyFlux) {
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Mono<DatabaseMapDictionaryDeep<T, U, US>> result = Mono.just(DatabaseMapDictionaryDeep.deepIntermediate(dictionary,
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prefixKey,
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keySerializer,
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subStageGetter,
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keyExtLength
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));
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if (assertsEnabled) {
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return checkKeyFluxConsistency(prefixKey, keyFlux).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 needsKeyFlux() {
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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 + getKeyBinaryLength();
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}).then();
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}
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public int getKeyBinaryLength() {
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return keySerializer.getSerializedBinaryLength() + keyExtLength;
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}
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}
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