de.escidoc.core.common.persistence.EscidocIdGenerator.java Source code

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Here is the source code for de.escidoc.core.common.persistence.EscidocIdGenerator.java

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/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the Common Development and Distribution License, Version 1.0
 * only (the "License"). You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at license/ESCIDOC.LICENSE or http://www.escidoc.de/license. See the License for
 * the specific language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each file and include the License file at
 * license/ESCIDOC.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by
 * brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 * Copyright 2006-2011 Fachinformationszentrum Karlsruhe Gesellschaft fuer wissenschaftlich-technische Information mbH
 * and Max-Planck-Gesellschaft zur Foerderung der Wissenschaft e.V. All rights reserved. Use is subject to license
 * terms.
 */

package de.escidoc.core.common.persistence;

import de.escidoc.core.common.exceptions.system.SystemException;
import de.escidoc.core.common.util.SpringApplicationContextHolder;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.id.IdentifierGenerator;

import java.io.Serializable;

/**
 * Implementation of a hibernate id generator.<br> This implementation fetches the ids from the {@link
 * EscidocIdProvider}.
 *
 * @author Torsten Tetteroo
 */
public class EscidocIdGenerator implements IdentifierGenerator {

    public static final String ID_PREFIX = "escidoc:";

    /**
     * See Interface for functional description.
     */
    @Override
    public Serializable generate(final SessionImplementor sessionImplementor, final Object arg1) {
        try {
            final EscidocIdProvider idProvider = (EscidocIdProvider) SpringApplicationContextHolder.getContext()
                    .getBean("escidoc.core.business.EscidocIdProvider");
            return idProvider.getNextPid();
        } catch (final SystemException e) {
            throw new HibernateException("Failed to generate an id. ", e);
        }
    }

}