51 lines
1.8 KiB
Java
51 lines
1.8 KiB
Java
package it.cavallium.dbengine.database.collections;
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import it.cavallium.buffer.Buf;
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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 it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap;
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import java.util.Set;
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import org.jetbrains.annotations.Nullable;
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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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Buf prefixKeySupplier,
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SerializerFixedBinaryLength<T> keySuffixSerializer) {
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super(dictionary, prefixKeySupplier, keySuffixSerializer, DatabaseEmpty.nothingSerializer());
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}
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public static <T> DatabaseSetDictionary<T> simple(LLDictionary dictionary,
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SerializerFixedBinaryLength<T> keySerializer) {
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return new DatabaseSetDictionary<>(dictionary, null, keySerializer);
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}
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public static <T> DatabaseSetDictionary<T> tail(LLDictionary dictionary,
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Buf prefixKeySupplier,
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SerializerFixedBinaryLength<T> keySuffixSerializer) {
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return new DatabaseSetDictionary<>(dictionary, prefixKeySupplier, keySuffixSerializer);
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}
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public Set<T> getKeySet(@Nullable CompositeSnapshot snapshot) {
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var v = get(snapshot);
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return v != null ? v.keySet() : null;
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}
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public Set<T> setAndGetPreviousKeySet(Set<T> value) {
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var hm = new Object2ObjectLinkedOpenHashMap<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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var v = setAndGetPrevious(hm);
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return v != null ? v.keySet() : null;
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}
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public Set<T> clearAndGetPreviousKeySet() {
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var v = clearAndGetPrevious();
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return v != null ? v.keySet() : null;
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}
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}
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