55 lines
1.8 KiB
Java
55 lines
1.8 KiB
Java
package it.cavallium.dbengine.database.collections;
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import io.netty.buffer.api.Buffer;
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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.collections.DatabaseEmpty.Nothing;
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import it.cavallium.dbengine.database.serialization.SerializerFixedBinaryLength;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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@SuppressWarnings("unused")
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public class DatabaseSetDictionary<T> extends DatabaseMapDictionary<T, Nothing> {
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protected DatabaseSetDictionary(LLDictionary dictionary,
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Buffer prefixKey,
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SerializerFixedBinaryLength<T, Buffer> keySuffixSerializer) {
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super(dictionary, prefixKey, keySuffixSerializer, DatabaseEmpty.NOTHING_SERIALIZER);
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}
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public static <T> DatabaseSetDictionary<T> simple(LLDictionary dictionary,
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SerializerFixedBinaryLength<T, Buffer> keySerializer) {
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var buf = dictionary.getAllocator().buffer(0);
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try {
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return new DatabaseSetDictionary<>(dictionary, buf, keySerializer);
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} finally {
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buf.release();
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}
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}
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public static <T> DatabaseSetDictionary<T> tail(LLDictionary dictionary,
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Buffer prefixKey,
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SerializerFixedBinaryLength<T, Buffer> keySuffixSerializer) {
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return new DatabaseSetDictionary<>(dictionary, prefixKey, keySuffixSerializer);
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}
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public Mono<Set<T>> getKeySet(@Nullable CompositeSnapshot snapshot) {
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return get(snapshot).map(Map::keySet);
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}
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public Mono<Set<T>> setAndGetPreviousKeySet(Set<T> value) {
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var hm = new HashMap<T, Nothing>();
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for (T t : value) {
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hm.put(t, DatabaseEmpty.NOTHING);
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}
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return setAndGetPrevious(hm).map(Map::keySet);
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}
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public Mono<Set<T>> clearAndGetPreviousKeySet() {
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return clearAndGetPrevious().map(Map::keySet);
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}
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}
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