48 lines
1.3 KiB
Java
48 lines
1.3 KiB
Java
package it.cavallium.dbengine.database.collections;
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import io.netty.buffer.api.Buffer;
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import io.netty.buffer.api.BufferAllocator;
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import io.netty.buffer.api.Send;
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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 java.util.function.Function;
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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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public static Serializer<Nothing, Send<Buffer>> nothingSerializer(BufferAllocator bufferAllocator) {
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return new Serializer<>() {
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@Override
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public @NotNull Nothing deserialize(@NotNull Send<Buffer> serialized) {
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try (serialized) {
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return NOTHING;
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}
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}
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@Override
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public @NotNull Send<Buffer> serialize(@NotNull Nothing deserialized) {
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return bufferAllocator.allocate(0).send();
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}
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};
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}
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private DatabaseEmpty() {
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}
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public static DatabaseStageEntry<Nothing> create(LLDictionary dictionary, Send<Buffer> key) {
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return new DatabaseSingle<>(dictionary, key, nothingSerializer(dictionary.getAllocator()));
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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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} |