45 lines
1.3 KiB
Java
45 lines
1.3 KiB
Java
package it.cavallium.dbengine.database.collections;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.serialization.Serializer;
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import org.jetbrains.annotations.NotNull;
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public class DatabaseEmpty {
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@SuppressWarnings({"unused", "InstantiationOfUtilityClass"})
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public static final Nothing NOTHING = new Nothing();
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private static final byte[] NOTHING_BYTES = new byte[0];
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private static final Serializer<Nothing, byte[]> NOTHING_SERIALIZER = new Serializer<>() {
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@Override
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public @NotNull Nothing deserialize(byte @NotNull [] serialized) {
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return NOTHING;
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}
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@Override
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public byte @NotNull [] serialize(@NotNull Nothing deserialized) {
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return NOTHING_BYTES;
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}
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};
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private static final SubStageGetter<Nothing, DatabaseStageEntry<Nothing>> NOTHING_SUB_STAGE_GETTER = new SubStageGetterSingle<>(NOTHING_SERIALIZER);
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private DatabaseEmpty() {
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}
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public static DatabaseStageEntry<Nothing> create(LLDictionary dictionary, byte[] key) {
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return new DatabaseSingle<>(dictionary, key, NOTHING_SERIALIZER);
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}
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public static SubStageGetter<Nothing, DatabaseStageEntry<Nothing>> createSubStageGetter() {
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return NOTHING_SUB_STAGE_GETTER;
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}
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public static final class Nothing {
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@SuppressWarnings("InstantiationOfUtilityClass")
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public static Nothing INSTANCE = new Nothing();
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private Nothing() {
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}
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}
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} |