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/**
 * PETALS - PETALS Services Platform.
 * Copyright (c) 2005 EBM Websourcing, http://www.ebmwebsourcing.com/
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * -------------------------------------------------------------------------
 * $Id$
 * -------------------------------------------------------------------------
 */
package org.objectweb.petals.ant;

import java.net.MalformedURLException;
import java.net.URL;

import javax.management.MBeanServerConnection;

import org.apache.tools.ant.BuildException;

/**
 * This class is used to install or deploy a JBI component, shared library or
 * service assembly
 *
 * @author ddesjardins chamerling - eBMWebsourcing
 */
public abstract class AbstractInstallerAntTask extends AbstractJBIAntTask {

    /**
     * Action : installSharedLibrary
     */
    protected static final String INSTALL_SHARED_LIBRARY = "installSharedLibrary";

    /**
     * Action : loadNewInstaller
     */
    protected static final String LOAD_NEW_INSTALLED = "loadNewInstaller";

    /**
     * Fully qualified installation file path name
     */
    protected String file;

    /**
     * Perform a Install or Deploy action
     *
     * @param connection
     * @param action
     * @return
     * @throws Exception
     */
    protected Object performAction(MBeanServerConnection connection,
        String action) throws Exception {
        validateFileParameter();

        Object[] parameters = new Object[1];
        parameters[0] = getFileAsUrl(file);
        String[] signature = new String[] {"java.lang.String"};
        Object result = connection.invoke(JBIJMXConnectorUtil
            .getInstallationServiceMBeanName(connection), action, parameters,
            signature);
        return result;
    }

    /**
     * Create an URL like file://fileName if the fileName is not a valid url.
     *
     * @param fileName
     * @return
     */
    protected String getFileAsUrl(String fileName) {
        String result = fileName;
        try {
            new URL(fileName);
        } catch (MalformedURLException e) {
            // generate an url with the file name
            try {
                URL url = new URL("file", null, fileName);
                result = url.toExternalForm();
            } catch (MalformedURLException e1) {
            }
        }
        return result;
    }

    /**
     * Validate the file parameter. The file parameter should not be null and
     * must be a jar or a zip archive.
     *
     * @throws BuildException
     */
    protected void validateFileParameter() throws BuildException {
        if (file == null) {
            throw new BuildException("Missing attribute 'file'");
        }
        if (!file.endsWith(".zip") && !file.endsWith(".jar")) {
            throw new BuildException("File '" + file
                + "' is not a valid archive (zip or jar required)");
        }
    }

    /**
     *
     * @param file
     */
    public void setFile(String file) {
        this.file = file;
    }

}