CavalliumDBEngine/src/main/java/it/cavallium/dbengine/database/collections/DatabaseEmpty.java

45 lines
1.3 KiB
Java
Raw Normal View History

2021-02-04 00:48:49 +01:00
package it.cavallium.dbengine.database.collections;
import it.cavallium.dbengine.database.LLDictionary;
import it.cavallium.dbengine.database.serialization.Serializer;
import org.jetbrains.annotations.NotNull;
public class DatabaseEmpty {
@SuppressWarnings("unused")
public static final Nothing NOTHING = new Nothing();
private static final byte[] NOTHING_BYTES = new byte[0];
private static final Serializer<Nothing, byte[]> NOTHING_SERIALIZER = new Serializer<>() {
@Override
public @NotNull Nothing deserialize(byte @NotNull [] serialized) {
return NOTHING;
}
@Override
public byte @NotNull [] serialize(@NotNull Nothing deserialized) {
return NOTHING_BYTES;
}
};
private static final SubStageGetter<Nothing, DatabaseStageEntry<Nothing>> NOTHING_SUB_STAGE_GETTER = new SubStageGetterSingle<>(NOTHING_SERIALIZER);
private DatabaseEmpty() {
}
public static DatabaseStageEntry<Nothing> create(LLDictionary dictionary, byte[] key) {
return new DatabaseSingle<>(dictionary, key, NOTHING_SERIALIZER);
}
public static SubStageGetter<Nothing, DatabaseStageEntry<Nothing>> createSubStageGetter() {
return NOTHING_SUB_STAGE_GETTER;
}
public static final class Nothing {
2021-02-06 15:53:10 +01:00
@SuppressWarnings("InstantiationOfUtilityClass")
public static Nothing INSTANCE = new Nothing();
2021-02-04 00:48:49 +01:00
private Nothing() {
}
}
}