75 lines
2.4 KiB
Java
75 lines
2.4 KiB
Java
package it.cavallium.dbengine.database.collections;
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import it.cavallium.dbengine.buffers.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.Serializer;
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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 java.util.function.Function;
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import org.jetbrains.annotations.Nullable;
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@SuppressWarnings("unused")
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public class DatabaseSetDictionaryHashed<T, TH> extends DatabaseMapDictionaryHashed<T, Nothing, TH> {
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protected DatabaseSetDictionaryHashed(LLDictionary dictionary,
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@Nullable Buf prefixKeySupplier,
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Serializer<T> keySuffixSerializer,
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Function<T, TH> keySuffixHashFunction,
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SerializerFixedBinaryLength<TH> keySuffixHashSerializer) {
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super(dictionary,
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prefixKeySupplier,
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keySuffixSerializer,
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DatabaseEmpty.nothingSerializer(),
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keySuffixHashFunction,
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keySuffixHashSerializer
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);
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}
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public static <T, TH> DatabaseSetDictionaryHashed<T, TH> simple(LLDictionary dictionary,
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Serializer<T> keySerializer,
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Function<T, TH> keyHashFunction,
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SerializerFixedBinaryLength<TH> keyHashSerializer) {
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return new DatabaseSetDictionaryHashed<>(dictionary,
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null,
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keySerializer,
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keyHashFunction,
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keyHashSerializer
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);
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}
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public static <T, TH> DatabaseSetDictionaryHashed<T, TH> tail(LLDictionary dictionary,
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@Nullable Buf prefixKeySupplier,
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Serializer<T> keySuffixSerializer,
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Function<T, TH> keyHashFunction,
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SerializerFixedBinaryLength<TH> keyHashSerializer) {
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return new DatabaseSetDictionaryHashed<>(dictionary,
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prefixKeySupplier,
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keySuffixSerializer,
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keyHashFunction,
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keyHashSerializer
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);
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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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