/*
 * JBoss, Home of Professional Open Source.
 * See the COPYRIGHT.txt file distributed with this work for information
 * regarding copyright ownership.  Some portions may be licensed
 * to Red Hat, Inc. under one or more contributor license agreements.
 *
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */
package org.komodo.repository;

import javax.jcr.Repository;
import org.komodo.repository.internal.KSequencers;
import org.komodo.repository.internal.WorkspaceIdentifier;
import org.modeshape.jcr.JcrRepository;

/**
 * Factory for constructing instances of the sequencer controller
 */
public class KSequencersFactory {

    private static KSequencersFactory instance;

    /**
     * @return singleton instance of this factory
     */
    public static KSequencersFactory getInstance() {
        if (instance == null)
            instance = new KSequencersFactory();

        return instance;
    }

    private KSequencersFactory() {}

    /**
     * @param workspaceName a jcr workspace name
     * @param repository a jcr repository
     *
     * @return a new sequencer controller instance
     * @throws Exception if error occurs
     */
    public KSequencerController createSequencerController(String workspaceName, Repository repository) throws Exception {
        if (! (repository instanceof JcrRepository))
            throw new UnsupportedOperationException("Only modeshape repositories supported at this time"); //$NON-NLS-1$

        WorkspaceIdentifier identifier = new WorkspaceIdentifier(workspaceName, (JcrRepository) repository);
        return new KSequencers(identifier);
    }
    
}
