Example usage for java.lang Class getClassLoader

Introduction

In this page you can find the example usage for java.lang Class getClassLoader.

Prototype

@CallerSensitive
@ForceInline 
public ClassLoader getClassLoader()

Source Link

Document

Returns the class loader for the class.

Usage

From source file:main.java.refinement_class.Useful.java

static public byte[] readFileAsBytes(Class c, String fileName) throws IOException {
    InputStream inStream = new java.io.BufferedInputStream(c.getClassLoader().getResourceAsStream(fileName));
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int nbytes = 0;
    byte[] buffer = new byte[100000];

    try {/*from   w w  w.  j a  v a  2  s . com*/
        while ((nbytes = inStream.read(buffer)) != -1) {
            out.write(buffer, 0, nbytes);
        }
        return out.toByteArray();
    } finally {
        if (inStream != null) {
            inStream.close();
        }
        if (out != null) {
            out.close();
        }
    }
}

From source file:api_proto3.TestElf.java

public static void setSlf4jTargetStream(Class<?> clazz, PrintStream stream) {
    try {//from  w w w.ja  v  a 2  s  .  c  o  m
        //Log4jLogger log4Jlogger = (Log4jLogger) LoggerFactory.getLogger(clazz);
        Log4JLogger log4Jlogger = (Log4JLogger) LoggerFactory.getLogger(clazz);

        //Field field = clazz.getClassLoader().loadClass("org.apache.logging.slf4j.Log4jLogger").getDeclaredField("logger");
        Field field = clazz.getClassLoader().loadClass("org.apache.commons.logging.impl.Log4JLogger")
                .getDeclaredField("logger");
        field.setAccessible(true);

        Logger logger = (Logger) field.get(log4Jlogger);
        if (logger.getAppenders().containsKey("string")) {
            Appender appender = logger.getAppenders().get("string");
            logger.removeAppender(appender);
        }

        logger.addAppender(new StringAppender("string", stream));
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:com.palantir.leader.proxy.AwaitingLeadershipProxy.java

@SuppressWarnings("unchecked")
public static <T> T newProxyInstance(Class<T> interfaceClass, Supplier<T> delegateSupplier,
        LeaderElectionService leaderElectionService) {
    AwaitingLeadershipProxy proxy = new AwaitingLeadershipProxy(delegateSupplier, leaderElectionService,
            interfaceClass);//from w  ww.  j  a va2  s  .c om
    proxy.tryToGainLeadership();
    return (T) Proxy.newProxyInstance(interfaceClass.getClassLoader(),
            new Class<?>[] { interfaceClass, Closeable.class }, proxy);
}

From source file:com.tesora.dve.common.PEFileUtils.java

/**
 * Helper function to load a file from the classpath relative to the root
 * classpath and return it as an <code>InputStream</code>.
 * //from w  w  w. java 2  s. c  o m
 * @param testClass
 *            <code>Class</code> of caller
 * @param fileName
 *            name of file to load
 * @return <code>InputStream</code> of file
 * @throws PEException
 *             if file cannot be located
 */
public static InputStream getClasspathResourceStream(Class<?> testClass, String fileName) throws PEException {

    InputStream is = testClass.getClassLoader().getResourceAsStream(fileName);

    validateFileResource(fileName, is);

    return is;
}

From source file:com.mani.cucumber.ReflectionUtils.java

public static <T> Class<T> loadClass(Class<?> base, String name) {
    return loadClass(base.getClassLoader(), name);
}

From source file:org.apache.hama.bsp.BSPJob.java

private static String findContainingJar(Class<?> my_class) {
    ClassLoader loader = my_class.getClassLoader();
    String class_file = my_class.getName().replaceAll("\\.", "/") + ".class";
    try {/*from w w  w . j  a v a  2  s .  c  o m*/
        for (Enumeration<URL> itr = loader.getResources(class_file); itr.hasMoreElements();) {

            URL url = itr.nextElement();
            if ("jar".equals(url.getProtocol())) {
                String toReturn = url.getPath();
                if (toReturn.startsWith("file:")) {
                    toReturn = toReturn.substring("file:".length());
                }
                toReturn = URLDecoder.decode(toReturn, "UTF-8");
                return toReturn.replaceAll("!.*$", "");
            }
        }
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    return null;
}

From source file:org.apache.hive.hcatalog.templeton.tool.TempletonUtils.java

/**
 * Find a jar that contains a class of the same name and which
 * file name matches the given pattern.//from   w  w  w  .j ava2  s . co  m
 *
 * @param clazz the class to find.
 * @param fileNamePattern regex pattern that must match the jar full path
 * @return a jar file that contains the class, or null
 */
public static String findContainingJar(Class<?> clazz, String fileNamePattern) {
    ClassLoader loader = clazz.getClassLoader();
    String classFile = clazz.getName().replaceAll("\\.", "/") + ".class";
    try {
        for (final Enumeration<URL> itr = loader.getResources(classFile); itr.hasMoreElements();) {
            final URL url = itr.nextElement();
            if ("jar".equals(url.getProtocol())) {
                String toReturn = url.getPath();
                if (fileNamePattern == null || toReturn.matches(fileNamePattern)) {
                    toReturn = URLDecoder.decode(toReturn, "UTF-8");
                    return toReturn.replaceAll("!.*$", "");
                }
            }
        }
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    return null;
}

From source file:org.blocks4j.reconf.client.proxy.ConfigurationRepositoryFactory.java

private static synchronized <T> T newInstance(Class<T> arg, ConfigurationRepositoryElement repo) {
    ConfigurationRepositoryFactory factory = new ConfigurationRepositoryFactory();
    ConfigurationRepositoryUpdater thread = new ConfigurationRepositoryUpdater(repo,
            ServiceLocator.defaultImplementation, factory);
    Environment.addThreadToCheck(thread);
    thread.start();//www  .ja va 2  s  .co m
    return (T) Proxy.newProxyInstance(arg.getClassLoader(), new Class<?>[] { arg }, factory);
}

From source file:com.tesora.dve.common.PEFileUtils.java

public static URL getClasspathURL(final Class<?> testClass, final String fileName) throws PEException {
    final URL resource = testClass.getClassLoader().getResource(fileName);

    validateFileResource(fileName, resource);

    return resource;
}

From source file:fm.last.commons.io.LastFileUtils.java

/**
 * Searches for a file on local filesytem, classpath etc.
 * //w w  w  .  j  a v a  2  s . c om
 * @param fileName Name of file to find.
 * @param classToLoadFrom Class to use as a base for finding the file via it's classloader, if necessary.
 * @return The file if found on the file system.
 * @throws FileNotFoundException If the File could not be found.
 */
public static File getFile(String fileName, Class<?> classToLoadFrom) throws FileNotFoundException {
    File file = new File(fileName); // first try the path directly
    if (!file.exists()) {
        URL fileURL = classToLoadFrom.getResource(fileName);// next try the class's classpath
        if (fileURL == null) {
            fileURL = classToLoadFrom.getClassLoader().getResource(fileName);// next try the class' classloader's classpath
            if (fileURL == null) {
                fileURL = ClassLoader.getSystemClassLoader().getResource(fileName); // finally try the system classloader's
                // classpath
                if (fileURL == null) {
                    throw new FileNotFoundException(
                            "Could not find " + fileName + " on path, classpath " + "or system classpath");
                }
            }
        }
        file = new File(fileURL.getFile());
    }
    log.debug("Path to file located is " + file.getAbsolutePath());
    return file;
}