40 lines
1.5 KiB
Java
40 lines
1.5 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.Resource;
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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.LLUtils;
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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 org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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public class SubStageGetterMap<T, U> implements SubStageGetter<Map<T, U>, DatabaseMapDictionary<T, U>> {
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private final SerializerFixedBinaryLength<T> keySerializer;
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private final Serializer<U> valueSerializer;
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public SubStageGetterMap(SerializerFixedBinaryLength<T> keySerializer,
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Serializer<U> valueSerializer) {
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this.keySerializer = keySerializer;
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this.valueSerializer = valueSerializer;
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}
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@Override
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public Mono<DatabaseMapDictionary<T, U>> subStage(LLDictionary dictionary,
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@Nullable CompositeSnapshot snapshot,
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Mono<Send<Buffer>> prefixKeyMono) {
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return prefixKeyMono.map(prefixKeyToReceive -> {
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var prefixKey = prefixKeyToReceive.receive();
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return DatabaseMapDictionary.tail(dictionary, prefixKey, keySerializer, valueSerializer, null);
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}).doOnDiscard(Send.class, Send::close).doOnDiscard(Resource.class, Resource::close);
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}
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public int getKeyBinaryLength() {
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return keySerializer.getSerializedBinaryLength();
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}
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}
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