| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Gobernment (CIT)

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 * 

 * This program 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 General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {DiSiD Technologies}   {Create a base Locator implementation}

 */

package org.gvsig.tools.library.impl;

import java.util.HashSet;

import java.util.Set;

import org.gvsig.tools.library.Library;

import org.gvsig.tools.library.LibraryException;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Base Library implementation, checking that a Library is initialized and

 * postInitialized only once.

 * 

 * Also adds initialization logging.

 * 

 * @author <a href="mailto:cordin@disid.com">C?sar Ordi?ana</a>

 * @author jjdelcerro

 */

public abstract class BaseLibrary implements Library {

        public static Set initialized = new HashSet();

        public static Set postInitialized = new HashSet();

        public synchronized final void initialize() throws LibraryException {

                Logger logger = null;

                // Check if we have been already initialized

                String name = getName();

                if (initialized.contains(name)) {

                        return;

                }

                logger = LoggerFactory.getLogger(this.getClass());

                logger

                                .info("Initializing library '" + this.getClass().getName()

                                                + "'.");

                doInitialize();

                // Set the current Library as initialized

                initialized.add(name);

        }

        public synchronized final void postInitialize() throws LibraryException {

                Logger logger = null;

                // Check if we have been already postInitialized

                String name = getName();

                if (postInitialized.contains(name)) {

                        return;

                }

                logger = LoggerFactory.getLogger(this.getClass());

                logger.info("PostInitializing library '" + this.getClass().getName()

                                + "'.");

                doPostInitialize();

                // Set the current Library as postInitialized

                postInitialized.add(name);

        }

        protected abstract void doInitialize() throws LibraryException;

        protected abstract void doPostInitialize() throws LibraryException;

        /**

         * Returns the name of the current Library

         */

        private String getName() {

                return getClass().getName();

        }

}