/*******************************************************************************
 * Copyright (c) 2009, 2010 Progress Software Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 ******************************************************************************/
package org.fusesource.tools.messaging.utils;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
import org.fusesource.tools.messaging.ui.dialogs.DestinationDialog;

public class ExtensionsUtil {

    public static final String EXTENSION_CLASS = "class";
    public static final String EXTENSION_ID = "id";
    public static final String EXTENSION_PROVIDERID = "providerid";
    public static final String MESSAGE_TYPE = "type";

    private static IConfigurationElement[] msgTypeUIConfigElements;

    public static DestinationDialog getDestinationUIExtension(String type, String providerID) {
        if (type == null || providerID == null) {
            return null;
        }
        IConfigurationElement[] extensions = getConfigElementsForMsgTypeUI(DestinationDialog.DESTINATION_UI_EXT_PT);
        String tempType = "";
        String tempProviderId = "";
        for (IConfigurationElement extnData : extensions) {
            try {
                DestinationDialog participant = (DestinationDialog) extnData.createExecutableExtension(EXTENSION_CLASS);
                tempProviderId = extnData.getAttribute(EXTENSION_PROVIDERID);
                tempType = extnData.getAttribute(MESSAGE_TYPE);
                if (type.equals(tempType) && providerID.equals(tempProviderId)) {
                    return participant;
                }
            } catch (CoreException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    private static IConfigurationElement[] getConfigElementsForMsgTypeUI(String id) {
        IExtensionPoint xp = Platform.getExtensionRegistry().getExtensionPoint(id);
        if (xp == null) {
            return new IConfigurationElement[0];
        }

        msgTypeUIConfigElements = xp.getConfigurationElements();
        return msgTypeUIConfigElements;
    }

}