/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.wildfly.clustering.marshalling.spi;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

import org.wildfly.clustering.marshalling.Externalizer;

/**
 * Base {@link Externalizer} for enumerations.
 * @author Paul Ferraro
 */
public class EnumExternalizer<E extends Enum<E>> implements Externalizer<E> {

    private final IndexExternalizer ordinalExternalizer;
    private final Class<E> enumClass;

    public EnumExternalizer(Class<E> enumClass) {
        this.ordinalExternalizer = IndexExternalizer.select(enumClass.getEnumConstants().length);
        this.enumClass = enumClass;
    }

    @Override
    public void writeObject(ObjectOutput output, E value) throws IOException {
        this.ordinalExternalizer.writeData(output, value.ordinal());
    }

    @Override
    public E readObject(ObjectInput input) throws IOException, ClassNotFoundException {
        return this.enumClass.getEnumConstants()[this.ordinalExternalizer.readData(input)];
    }

    @Override
    public Class<E> getTargetClass() {
        return this.enumClass;
    }
}
