org.wildfly.clustering.marshalling.protostream.time.LocalDateMarshaller Maven / Gradle / Ivy

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/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.wildfly.clustering.marshalling.protostream.time;

import java.io.IOException;
import java.time.LocalDate;

import org.infinispan.protostream.descriptors.WireType;
import org.wildfly.clustering.marshalling.protostream.FieldSetMarshaller;
import org.wildfly.clustering.marshalling.protostream.ProtoStreamReader;
import org.wildfly.clustering.marshalling.protostream.ProtoStreamWriter;

/**
 * Marshals a {@link LocalDate} as an epoch day.
 * @author Paul Ferraro
 */
public enum LocalDateMarshaller implements FieldSetMarshaller.Simple {
	INSTANCE;

	private static final int POST_EPOCH_DAY = 0;
	private static final int PRE_EPOCH_DAY = 1;
	private static final int FIELDS = 2;

	private static final LocalDate EPOCH = LocalDate.ofEpochDay(0);

	@Override
	public LocalDate createInitialValue() {
		return EPOCH;
	}

	@Override
	public int getFields() {
		return FIELDS;
	}

	@Override
	public LocalDate readFrom(ProtoStreamReader reader, int index, WireType type, LocalDate date) throws IOException {
		switch (index) {
			case POST_EPOCH_DAY:
				return LocalDate.ofEpochDay(reader.readUInt64());
			case PRE_EPOCH_DAY:
				return LocalDate.ofEpochDay(0L - reader.readUInt64());
			default:
				reader.skipField(type);
				return date;
		}
	}

	@Override
	public void writeTo(ProtoStreamWriter writer, LocalDate date) throws IOException {
		long epochDay = date.toEpochDay();
		if (epochDay > 0) {
			writer.writeUInt64(POST_EPOCH_DAY, epochDay);
		} else if (epochDay < 0) {
			writer.writeUInt64(PRE_EPOCH_DAY, 0L - epochDay);
		}
	}
}