2014-02-17 23:58:40 +01:00
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/**
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*
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* Copyright the original author or authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.net.URI;
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import java.util.ArrayList;
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import java.util.List;
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public final class FileUtils {
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private FileUtils() {
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}
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public static InputStream getStreamForUrl(String url, ClassLoader loader) throws MalformedURLException, IOException {
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URI fileUri = URI.create(url);
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if (fileUri.getScheme() == null) {
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throw new MalformedURLException("No protocol found in file URL: " + url);
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}
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if (fileUri.getScheme().equals("classpath")) {
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// Get an array of class loaders to try loading the providers files from.
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ClassLoader[] classLoaders = getClassLoaders();
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for (ClassLoader classLoader : classLoaders) {
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InputStream is = classLoader.getResourceAsStream(fileUri.getSchemeSpecificPart());
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if (is != null) {
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return is;
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}
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}
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}
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else {
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return fileUri.toURL().openStream();
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}
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return null;
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}
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/**
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* Returns default classloaders.
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*
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* @return an array of ClassLoader instances.
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*/
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public static ClassLoader[] getClassLoaders() {
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ClassLoader[] classLoaders = new ClassLoader[2];
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classLoaders[0] = FileUtils.class.getClassLoader();
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classLoaders[1] = Thread.currentThread().getContextClassLoader();
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// Clean up possible null values. Note that #getClassLoader may return a null value.
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List<ClassLoader> loaders = new ArrayList<ClassLoader>();
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for (ClassLoader classLoader : classLoaders) {
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if (classLoader != null) {
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loaders.add(classLoader);
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}
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}
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return loaders.toArray(new ClassLoader[loaders.size()]);
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}
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}
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