Smack/source/org/jivesoftware/smack/util/FileUtils.java

60 lines
1.9 KiB
Java

package org.jivesoftware.smack.util;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
public final class FileUtils {
private FileUtils() {
}
public static InputStream getStreamForUrl(String url, ClassLoader loader) throws MalformedURLException, IOException {
URI fileUri = URI.create(url);
if (fileUri.getScheme() == null) {
throw new MalformedURLException("No protocol found in file URL: " + url);
}
if (fileUri.getScheme().equals("classpath")) {
// Get an array of class loaders to try loading the providers files from.
ClassLoader[] classLoaders = getClassLoaders();
for (ClassLoader classLoader : classLoaders) {
InputStream is = classLoader.getResourceAsStream(fileUri.getSchemeSpecificPart());
if (is != null) {
return is;
}
}
}
else {
return fileUri.toURL().openStream();
}
return null;
}
/**
* Returns default classloaders.
*
* @return an array of ClassLoader instances.
*/
public static ClassLoader[] getClassLoaders() {
ClassLoader[] classLoaders = new ClassLoader[2];
classLoaders[0] = FileUtils.class.getClassLoader();
classLoaders[1] = Thread.currentThread().getContextClassLoader();
// Clean up possible null values. Note that #getClassLoader may return a null value.
List<ClassLoader> loaders = new ArrayList<ClassLoader>();
for (ClassLoader classLoader : classLoaders) {
if (classLoader != null) {
loaders.add(classLoader);
}
}
return loaders.toArray(new ClassLoader[loaders.size()]);
}
}