/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, 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.jboss.as.jpa.container;

import java.io.Serializable;
import java.util.UUID;

/**
 * Uniquely identifies an ExtendedEntityManager instance.
 *
 * @author Scott Marlow
 */
public class ExtendedEntityManagerKey implements Serializable {
    private static final long serialVersionUID = 135790L;
    private final String ID = UUID.randomUUID().toString();

    /**
     * generates a new unique ExtendedEntityManagerID
     * @return unique ExtendedEntityManagerID
     */
    public static ExtendedEntityManagerKey extendedEntityManagerID() {
        return new ExtendedEntityManagerKey();
    }

    @Override
    public String toString() {
        return "ExtendedEntityManagerKey{" +
            "ID='" + ID + '\'' +
            '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || ! (o instanceof ExtendedEntityManagerKey))
            return false;

        ExtendedEntityManagerKey that = (ExtendedEntityManagerKey) o;
        if (ID != null ? !ID.equals(that.getKey()) : that.getKey() != null)
            return false;

        return true;
    }

    @Override
    public int hashCode() {
        return ID != null ? ID.hashCode() : 0;
    }


    public String getKey() {
        return ID;
    }


}
