DynamicResourceIncludeUtil.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * 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 (at your option)
 * 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.
 */

package com.liferay.portal.kernel.servlet;

import com.liferay.portal.kernel.util.Validator;
import com.liferay.registry.collections.ServiceTrackerCollections;

import java.net.MalformedURLException;
import java.net.URL;

import java.util.List;

import javax.servlet.ServletContext;

/**
 * @author Leonardo Barros
 */
public class DynamicResourceIncludeUtil {

	public static ServletContext getPathServletContext(String path) {
		for (ServletContext servletContext : _servletContexts) {
			if (Validator.isNotNull(servletContext.getContextPath()) &&
				path.startsWith(servletContext.getContextPath())) {

				return servletContext;
			}
		}

		return null;
	}

	public static URL getResource(ServletContext servletContext, String path) {
		path = PortalWebResourcesUtil.stripContextPath(servletContext, path);

		try {
			URL url = servletContext.getResource(path);

			if (url != null) {
				return url;
			}
		}
		catch (MalformedURLException murle) {
		}

		return null;
	}

	public static URL getResource(String path) {
		ServletContext servletContext = getPathServletContext(path);

		if (servletContext != null) {
			return getResource(servletContext, path);
		}

		return null;
	}

	private static final List<ServletContext> _servletContexts =
		ServiceTrackerCollections.openList(ServletContext.class);

}