54 lines
1.9 KiB
Java
54 lines
1.9 KiB
Java
package it.cavallium.dbengine.database.collections;
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import io.net5.buffer.api.Buffer;
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import io.net5.buffer.api.Send;
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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.Mono;
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public class SubStageGetterMapDeep<T, U, US extends DatabaseStage<U>> implements
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SubStageGetter<Map<T, U>, DatabaseMapDictionaryDeep<T, U, US>> {
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private final SubStageGetter<U, US> subStageGetter;
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private final SerializerFixedBinaryLength<T> 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> 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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Mono<Send<Buffer>> prefixKeyMono) {
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return Mono.usingWhen(prefixKeyMono,
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prefixKey -> Mono.fromSupplier(() -> DatabaseMapDictionaryDeep
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.deepIntermediate(dictionary, prefixKey, keySerializer, subStageGetter, keyExtLength)),
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prefixKey -> Mono.fromRunnable(prefixKey::close)
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);
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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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