/*******************************************************************************
 * Copyright (c) 2004 IBM Corporation and others.
 * 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
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.html.ui.internal.contentproperties.ui;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;

public class DeviceProfileEntryProviderBuilder {
	private static final String EXTENSION_POINT_PLUGINID = "org.eclipse.wst.html.ui";  //$NON-NLS-1$
	private static final String EXTENSION_POINT_NAME = "deviceProfileEntryProvider"; //$NON-NLS-1$
	private static final String ATTR_CLASS = "class"; //$NON-NLS-1$

	public DeviceProfileEntryProviderBuilder() {
		super();
	}
	static public DeviceProfileEntryProvider getEntryProvider() {
		IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(EXTENSION_POINT_PLUGINID, EXTENSION_POINT_NAME);
		if (point != null) {
			IExtension extensions[] = point.getExtensions();
			if ((extensions != null) && (extensions.length > 0)) {
				for (int i = 0; i < extensions.length; i++) {
					IConfigurationElement elements[] = extensions[i].getConfigurationElements();
					if ((elements != null) && (elements.length > 0)) {
						for (int j = 0; j < elements.length; j++) {
							IConfigurationElement config = elements[j];
							if ((config != null) && (config.getName().equals(EXTENSION_POINT_NAME) == true)) {
								String className = config.getAttribute(ATTR_CLASS);
								if (className != null) {
									try {
										DeviceProfileEntryProvider provider = (DeviceProfileEntryProvider)config.createExecutableExtension(ATTR_CLASS);
										if (provider != null) {
											return provider;
										}
									} catch (CoreException ignored) {
									}
								}
							}
						}
					}
				}
			}
		}
		return null;
	}
}