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/**
 * PETALS: PETALS Services Platform
 * Copyright (C) 2005 EBM WebSourcing
 *
 * 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 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.
 *
 * Initial developer(s): EBM WebSourcing
 *
 * --------------------------------------------------------------------------
 * $Id$
 * --------------------------------------------------------------------------
 */
package org.objectweb.petals.ant.task;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.management.Attribute;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;

import org.objectweb.petals.ant.AbstractInstallerAntTask;

/**
 * Ant task : jbi-install-component. This task install a JBI component (service
 * engine of binding component) into the JBI environment.
 *
 * @author ddesjardins chamerling - eBMWebsourcing
 */
public class InstallComponentTask extends AbstractInstallerAntTask {

    /**
     * The nested elements 
     */
    private List nestedParams = new ArrayList();

    /**
     * Location of the nestedParams file that contains MBean properties
     */
    private String params;

    /**
     * Creates a new instance of {@link InstallComponentTask}
     *
     */
    public InstallComponentTask() {
        super();
    }

    /**
     * Execute the ant task
     *
     * @throws IOException
     */
    public void doTask() throws Exception {
        MBeanServerConnection connection = connector.getMBeanServerConnection();



        Object result = performAction(connection,
            AbstractInstallerAntTask.LOAD_NEW_INSTALLED);
        if (result instanceof ObjectName) {
            ObjectName installerName = (ObjectName) result;


            // Get the installer configuration
            Object result1 = connection.getAttribute(installerName,
                "InstallerConfigurationMBean");
            if (result1 instanceof ObjectName) {
                // set the properties and parameters
                ObjectName configurationMBean = (ObjectName) result1;
                setConnectionAttributeFromPropertiesFile(connection,
                    configurationMBean);
                setConnectionAttributeFromNestedParam(connection,
                    configurationMBean);
            }

            // Install the component
            Object[] objects = new Object[0];
            String[] strings = new String[0];
            connection.invoke(installerName, "install", objects, strings);
            try {
                log("The component '" + installerName.getKeyProperty("name")
                    + "' has been installed");
            } catch (NullPointerException e) {
            }

        }
    }

    /**
     * Get the properties from the params file.
     *
     * @return
     * @throws IOException
     */
    private Properties loadProperties() throws IOException {
        Properties props = new Properties();
        if (params != null)
            props.load(new FileInputStream(params));

        return props;
    }

    /**
     * Set the connection attributes from the properties file
     *
     * @nestedParams connection
     * @nestedParams configurationMBean
     * @throws Exception
     */
    private void setConnectionAttributeFromPropertiesFile(
        MBeanServerConnection connection, ObjectName configurationMBean)
        throws Exception {
        Properties props = loadProperties();
        for (Map.Entry entry : props.entrySet()) {
            Attribute attribute = new Attribute((String) entry.getKey(),
                (String) entry.getValue());
            connection.setAttribute(configurationMBean, attribute);
        }
    }

    /**
     * Set the connection attribute from the nested params
     *
     * @nestedParams connection
     * @nestedParams configurationMBean
     * @throws Exception
     */
    private void setConnectionAttributeFromNestedParam(
        MBeanServerConnection connection, ObjectName configurationMBean)
        throws Exception {
        // Set the properties of the  element
        for (Param p : nestedParams) {
            Attribute attribute = new Attribute(p.getName(), p.getValue());
            connection.setAttribute(configurationMBean, attribute);
        }
    }

    /**
     * @return the params
     */
    public String getParams() {
        return params;
    }

    /**
     * @nestedParams params
     *            the params to set
     */
    public void setParams(String params) {
        this.params = params;
    }

    /**
     *
     * @return
     */
    public Param createParam() {
        Param param = new Param();
        nestedParams.add(param);
        return param;
    }

    /**
     * Parameter class for nested  elements
     * @author chamerling
     *
     */
    public static class Param {
        /**
         * Name attribute
         */
        private String name;

        /**
         * Value attribute
         */
        private String value;

        /**
         * Creates a new instance of {@link Param}
         *
         */
        public Param() {
            this ("", "");
        }

        /**
         * Creates a new instance of {@link Param}
         *
         * @param name
         * @param value
         */
        public Param(String name, String value) {
            this.name = name;
            this.value = value;
        }

        /**
         * @return the name
         */
        public String getName() {
            return name;
        }

        /**
         * @param name the name to set
         */
        public void setName(String name) {
            this.name = name;
        }

        /**
         * @return the value
         */
        public String getValue() {
            return value;
        }

        /**
         * @param value the value to set
         */
        public void setValue(String value) {
            this.value = value;
        }

    }
}