/**

 * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "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:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 */

package org.symbian.tools.tmw.internal.ui.wizard;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;

import java.util.TreeMap;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IConfigurationElement;

import org.eclipse.core.runtime.Platform;

import org.symbian.tools.tmw.ui.TMWCoreUI;

import org.symbian.tools.tmw.ui.project.INewApplicationWizardPage;

public class PageContributions {

    private Map<String, List<IConfigurationElement>> templatePages;

    public INewApplicationWizardPage[] createPages(final String id) {

        if (templatePages == null) {

            walkExtensions();

        }

        final List<IConfigurationElement> pages = templatePages.get(id);

        if (pages == null || pages.size() == 0) {

            return new INewApplicationWizardPage[0];

        }

        final INewApplicationWizardPage[] newPages = new INewApplicationWizardPage[pages.size()];

        for (int i = 0; i < pages.size(); i++) {

            IConfigurationElement element = pages.get(i);

            try {

                newPages[i] = (INewApplicationWizardPage) element.createExecutableExtension("class");

            } catch (CoreException e) {

                TMWCoreUI.log(e);

            }

        }

        return newPages;

    }

    private void walkExtensions() {

        final IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(

                TMWCoreUI.PLUGIN_ID, "wizardPages");

        templatePages = new TreeMap<String, List<IConfigurationElement>>();

        for (IConfigurationElement element : elements) {

            final String id = element.getAttribute("template-id");

            List<IConfigurationElement> extensions = templatePages.get(id);

            if (extensions == null) {

                extensions = new LinkedList<IConfigurationElement>();

                templatePages.put(id, extensions);

            }

            extensions.add(element);

        }

    }

}