/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.mj.impl.rt.midp;

import java.util.Enumeration;

import com.nokia.mj.impl.storage.StorageAttribute;

import com.nokia.mj.impl.storage.StorageEntry;

import com.nokia.mj.impl.storage.StorageFactory;

import com.nokia.mj.impl.storage.StorageNames;

import com.nokia.mj.impl.storage.StorageSession;

import com.nokia.mj.impl.utils.Uid;

/**

 * A utility class for reading the MIDlet specfic data from storage. At the

 * moment it is known that setMidletStartArguments() is called first and

 * rigth after that setMidletAttributes() is called. Therefore the session

 * created in setMidletStartArguments() is reused in setMidletAttributes()

 * method and then closed. If this scenario changes, then the close must

 * be done also in setMidletStartArguments() method.

 *

 * @author Nokia Corporation

 * @version $Rev$

 */

final class StorageAccessor

{

    /**

     * Session to storage in order to re-use.

     */

    private static StorageSession mSession;

    /*** ----------------------------- PACKAGE ---------------------------- */

    /**

     * Sets the MidletInfo to contain a set of static data related to the

     * MIDlet.

     * @param midletInfo where to store the data.

     */

    static void setMidletStartArguments(MidletInfo midletInfo)

    {

        mSession = StorageFactory.createSession();

        mSession.open();

        // Reading the MIDlet specific attributes from APPLICATION_TABLE.

        // MIDlet UID is a key.

        StorageEntry midletEntry =

            mSession.readEntry(StorageNames.APPLICATION_TABLE,

                               midletInfo.getUid());

        // Set the main class of the MIDlet.

        midletInfo.setMainClass(

            midletEntry.getAttribute(StorageNames.MAIN_CLASS).getValue());

        // Set the name of the MIDlet.

        midletInfo.setName(

            midletEntry.getAttribute(StorageNames.NAME).getValue());

        // Set the UID of the MIDlet suite.

        midletInfo.setSuiteUid(Uid.createUid(

                                   midletEntry.getAttribute(StorageNames.PACKAGE_ID).getValue()));

        // Reading the MIDlet suite specific attributes from

        // APPLICATION_PACKAGE_TABLE. MIDlet suite UID is a key.

        StorageEntry midletSuiteEntry =

            mSession.readEntry(StorageNames.APPLICATION_PACKAGE_TABLE,

                               midletInfo.getSuiteUid());

        // Set the name of the MIDlet suite.

        midletInfo.setSuiteName(

            midletSuiteEntry.getAttribute(StorageNames.PACKAGE_NAME).

            getValue());

        // Set the vendor of the MIDlet suite.

        midletInfo.setVendor(

            midletSuiteEntry.getAttribute(StorageNames.VENDOR).getValue());

        // Set the version of the MIDlet suite.

        midletInfo.setVersion(

            midletSuiteEntry.getAttribute(StorageNames.VERSION).getValue());

        // Set the root path of the MIDlet suite.

        midletInfo.setRootPath(

            midletSuiteEntry.getAttribute(StorageNames.ROOT_PATH).getValue());

        // Set the classpath of the MIDlet suite.

        midletInfo.setClassPath(

            midletSuiteEntry.getAttribute(StorageNames.JAR_PATH).getValue());

        // Set the drm info.

        midletInfo.setDrm(

            midletSuiteEntry.getAttribute(StorageNames.CONTENT_INFO).

            getValue().equals("1"));

        StorageAttribute contentId =

            midletSuiteEntry.getAttribute(StorageNames.CONTENT_ID);

        if (contentId != null)

        {

            midletInfo.setContentId(contentId.getValue());

        }

        // Reading the MIDlet suite specific attributes from

        // MIDP_PACKAGE_TABLE. MIDlet suite UID is a key.

        StorageEntry midletSuiteSpecificEntry =

            mSession.readEntry(StorageNames.MIDP_PACKAGE_TABLE,

                               midletInfo.getSuiteUid());

        midletInfo.setProtectionDomain(

            midletSuiteSpecificEntry.getAttribute(

                StorageNames.SECURITY_DOMAIN_CATEGORY).

            getValue());

        // Set the hash of the MIDlet suite if available.

        StorageAttribute hash =

            midletSuiteSpecificEntry.getAttribute(StorageNames.HASH);

        if (hash != null)

        {

            midletInfo.setMidletHash(hash.getValue());

        }

        // Set the securoty domain name of the MIDlet suite.

        midletInfo.setProtectionDomainName(

            midletSuiteSpecificEntry.getAttribute(

                StorageNames.SECURITY_DOMAIN).getValue());

        // Set the hash of the root if available.

        StorageAttribute rootHash =

            midletSuiteSpecificEntry.getAttribute(StorageNames.CERT_HASH);

        if (rootHash != null)

        {

            midletInfo.setRootHash(rootHash.getValue());

        }

        // Session is intentionally left open in a success case since at the

        // moment setMidletAttributes() is called before starting the MIDlet,

        // so already created session can be re-used.

    }

    /**

     * Sets the MidletInfo to contain MIDlet attributes stored from manifest

     * and jad file (if exists) during installation.

     * @param midletInfo where to store the attributes.

     */

    static void setMidletAttributes(MidletInfo midletInfo)

    {

        try

        {

            // Re-use the session if available.

            if (mSession == null)

            {

                mSession = StorageFactory.createSession();

                mSession.open();

            }

            // Reading the MIDlet suite attributes from

            // APPLICATION_PACKAGE_ATTRIBUTES_TABLE. MIDlet suite UID is a key.

            StorageEntry[] attributeEntries =

                mSession.readEntries(

                    StorageNames.APPLICATION_PACKAGE_ATTRIBUTES_TABLE,

                    midletInfo.getSuiteUid());

            if (attributeEntries != null)

            {

                int midletN = 1;

                // Loop through all the arguments and store them.

                for (int i = 0; i<attributeEntries.length; ++i)

                {

                    StorageAttribute name =

                        attributeEntries[i].getAttribute(StorageNames.NAME);

                    StorageAttribute value =

                        attributeEntries[i].getAttribute(StorageNames.VALUE);

                    midletInfo.addAttribute(name.getValue(), value.getValue());

                    // Determine what is the <n> of this MIDlet,

                    // (which attribute "Nokia-MIDlet-Localized-<n>" contains the localized

                    // name of this MIDlet)

                    if ((value.getValue().indexOf(midletInfo.getName()) > -1) &&

                            name.getValue().startsWith("MIDlet-"))

                    {

                        try

                        {

                            // Try to parse the rest of attribute name (after "MIDlet-")

                            // into an int. If this throws exception, the attribute was

                            // propably 'MIDlet-Name'

                            midletN = Integer.parseInt(name.getValue().substring(7));

                        }

                        catch (NumberFormatException ne) {};

                    }

                }

                // Set the localized name of the MIDlet.

                String localizedName = midletInfo.getAttribute("Nokia-MIDlet-Localized-" + midletN);

                if (localizedName == null)

                {

                    localizedName = midletInfo.getName();

                }

                midletInfo.setLocalizedName(localizedName);

            }

        }

        finally

        {

            // Closing the session.

            if (mSession != null)

            {

                mSession.close();

                mSession.destroySession();

                mSession = null;

            }

        }

    }

}