org.exoplatform.services.command.impl.CommandService.java Source code

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Here is the source code for org.exoplatform.services.command.impl.CommandService.java

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/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * 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.exoplatform.services.command.impl;

import org.apache.commons.chain.Catalog;
import org.apache.commons.chain.CatalogFactory;
import org.apache.commons.chain.config.ConfigParser;
import org.apache.commons.chain.impl.CatalogFactoryBase;
import org.apache.commons.digester.Digester;
import org.exoplatform.commons.utils.SecurityHelper;
import org.exoplatform.container.component.ComponentPlugin;
import org.xml.sax.SAXException;

import java.io.IOException;
import java.io.InputStream;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Iterator;

/**
 * Created by The eXo Platform SAS.
 * 
 * @author <a href="mailto:gennady.azarenkov@exoplatform.com">Gennady
 *         Azarenkov</a>
 * @version $Id: CommandService.java 12832 2007-02-15 12:41:32Z geaz $
 */

public class CommandService {

    // protected Catalog catalog;

    protected CatalogFactory catalogFactory;

    protected Digester digester;

    public CommandService() {
        this.catalogFactory = CatalogFactoryBase.getInstance();

        final ConfigParser parser = new ConfigParser();
        this.digester = SecurityHelper.doPrivilegedAction(new PrivilegedAction<Digester>() {
            public Digester run() {
                return parser.getDigester();
            }
        });
    }

    public void addPlugin(ComponentPlugin plugin) {
        // no needs to do anything as CatalogFactory is initialized in plugin

        // if (plugin instanceof CommonsXMLConfigurationPlugin) {
        // CommonsXMLConfigurationPlugin cplugin = (CommonsXMLConfigurationPlugin)
        // plugin;
        // can just reinitialize it every time as have single instance
        // catalog = cplugin.getCatalog();
        // Iterator names = cplugin.getCatalogNames();
        // while(names.hasNext()) {
        // String name = (String)names.next();
        // catalogs.put(name, cplugin.getCatalog(name));
        // }
        // }
    }

    /**
     * puts catalog (add or update) using XML input stream
     * 
     * @param xml
     * @throws IOException
     * @throws SAXException
     */
    public void putCatalog(final InputStream xml) throws IOException, SAXException {
        // ConfigParser parser = new ConfigParser();
        // Prepare our Digester instance
        // Digester digester = parser.getDigester();
        digester.clear();

        try {
            SecurityHelper.doPrivilegedExceptionAction(new PrivilegedExceptionAction<Void>() {
                public Void run() throws Exception {
                    digester.parse(xml);
                    return null;
                }
            });
        } catch (PrivilegedActionException pae) {
            Throwable cause = pae.getCause();
            if (cause instanceof IOException) {
                throw (IOException) cause;
            } else if (cause instanceof SAXException) {
                throw (SAXException) cause;
            } else if (cause instanceof RuntimeException) {
                throw (RuntimeException) cause;
            } else {
                throw new RuntimeException(cause);
            }
        }

        // parser.getDigester().parse(xml);
    }

    /**
     * @return default catalog
     */
    public Catalog getCatalog() {
        Catalog catalog = catalogFactory.getCatalog();
        return catalog;
    }

    /**
     * @param name
     * @return named catalog
     */
    public Catalog getCatalog(String name) {
        Catalog catalog = catalogFactory.getCatalog(name);
        return catalog;

    }

    /**
     * @return iterator of catalog names. default catalog is not listed here!
     */
    public Iterator getCatalogNames() {
        return catalogFactory.getNames();
    }

}