95 lines
2.6 KiB
Java
95 lines
2.6 KiB
Java
package it.cavallium.dbengine.database.collections;
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.database.serialization.Serializer;
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import java.util.Optional;
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import java.util.function.Function;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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public class DatabaseSingleMapped<U> implements DatabaseStageEntry<U> {
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private final DatabaseSingle<byte[]> serializedSingle;
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private final Serializer<U, byte[]> serializer;
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public DatabaseSingleMapped(DatabaseSingle<byte[]> serializedSingle, Serializer<U, byte[]> serializer) {
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this.serializedSingle = serializedSingle;
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this.serializer = serializer;
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}
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@Override
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public Mono<U> get(@Nullable CompositeSnapshot snapshot) {
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return serializedSingle.get(snapshot).map(this::deserialize);
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}
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@Override
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public Mono<U> getOrDefault(@Nullable CompositeSnapshot snapshot, Mono<U> defaultValue) {
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return serializedSingle.get(snapshot).map(this::deserialize).switchIfEmpty(defaultValue);
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}
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@Override
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public Mono<Void> set(U value) {
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return serializedSingle.set(serialize(value));
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}
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@Override
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public Mono<U> setAndGetPrevious(U value) {
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return serializedSingle.setAndGetPrevious(serialize(value)).map(this::deserialize);
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}
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@Override
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public Mono<Boolean> setAndGetStatus(U value) {
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return serializedSingle.setAndGetStatus(serialize(value));
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}
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@Override
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public Mono<Boolean> update(Function<Optional<U>, Optional<U>> updater) {
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return serializedSingle.update(oldValue -> updater.apply(oldValue.map(this::deserialize)).map(this::serialize));
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}
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@Override
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public Mono<Void> clear() {
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return serializedSingle.clear();
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}
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@Override
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public Mono<U> clearAndGetPrevious() {
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return serializedSingle.clearAndGetPrevious().map(this::deserialize);
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}
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@Override
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public Mono<Boolean> clearAndGetStatus() {
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return serializedSingle.clearAndGetStatus();
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}
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@Override
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public Mono<Void> close() {
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return serializedSingle.close();
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}
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@Override
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public Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
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return serializedSingle.leavesCount(snapshot, fast);
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}
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@Override
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public Mono<Boolean> isEmpty(@Nullable CompositeSnapshot snapshot) {
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return serializedSingle.isEmpty(snapshot);
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}
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@Override
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public DatabaseStageEntry<U> entry() {
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return this;
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}
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//todo: temporary wrapper. convert the whole class to buffers
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private U deserialize(byte[] bytes) {
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return serializer.deserialize(bytes);
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}
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//todo: temporary wrapper. convert the whole class to buffers
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private byte[] serialize(U bytes) {
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return serializer.serialize(bytes);
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}
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}
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