--- /dev/null
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. 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
+ */
+package org.opendaylight.yangtools.yang.binding.util;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Joiner;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Supplier;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.locks.Lock;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * @deprecated Use {@link org.opendaylight.yangtools.util.ClassLoaderUtils} instead.
+ */
+@Deprecated
+public final class ClassLoaderUtils {
+ private static final Logger LOG = LoggerFactory.getLogger(ClassLoaderUtils.class);
+
+ private ClassLoaderUtils() {
+ throw new UnsupportedOperationException("Utility class");
+ }
+
+ /**
+ *
+ * Runs {@link Supplier} with provided {@link ClassLoader}.
+ *
+ * Invokes supplies function and makes sure that original {@link ClassLoader}
+ * is context {@link ClassLoader} after execution.
+ *
+ * @param cls {@link ClassLoader} to be used.
+ * @param function Function to be executed.
+ * @return Result of supplier invocation.
+ *
+ */
+ public static <V> V withClassLoader(final ClassLoader cls, final Supplier<V> function) {
+ checkNotNull(cls, "Classloader should not be null");
+ checkNotNull(function, "Function should not be null");
+
+ final ClassLoader oldCls = Thread.currentThread().getContextClassLoader();
+ try {
+ Thread.currentThread().setContextClassLoader(cls);
+ return function.get();
+ } finally {
+ Thread.currentThread().setContextClassLoader(oldCls);
+ }
+ }
+
+ /**
+ *
+ * Runs {@link Callable} with provided {@link ClassLoader}.
+ *
+ * Invokes supplies function and makes sure that original {@link ClassLoader}
+ * is context {@link ClassLoader} after execution.
+ *
+ * @param cls {@link ClassLoader} to be used.
+ * @param function Function to be executed.
+ * @return Result of callable invocation.
+ *
+ */
+ public static <V> V withClassLoader(final ClassLoader cls, final Callable<V> function) throws Exception {
+ checkNotNull(cls, "Classloader should not be null");
+ checkNotNull(function, "Function should not be null");
+
+ final ClassLoader oldCls = Thread.currentThread().getContextClassLoader();
+ try {
+ Thread.currentThread().setContextClassLoader(cls);
+ return function.call();
+ } finally {
+ Thread.currentThread().setContextClassLoader(oldCls);
+ }
+ }
+
+ /**
+ *
+ * Runs {@link Callable} with provided {@link ClassLoader} and Lock.
+ *
+ * Invokes supplies function after acquiring lock
+ * and makes sure that original {@link ClassLoader}
+ * is context {@link ClassLoader} and lock is unlocked
+ * after execution.
+ *
+ * @param cls {@link ClassLoader} to be used.
+ * @param function Function to be executed.
+ * @return Result of Callable invocation.
+ *
+ */
+ public static <V> V withClassLoaderAndLock(final ClassLoader cls, final Lock lock, final Supplier<V> function) {
+ checkNotNull(lock, "Lock should not be null");
+
+ lock.lock();
+ try {
+ return withClassLoader(cls, function);
+ } finally {
+ lock.unlock();
+ }
+ }
+
+ public static Object construct(final Constructor<? extends Object> constructor, final List<Object> objects)
+ throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
+ final Object[] initargs = objects.toArray();
+ return constructor.newInstance(initargs);
+ }
+
+ /**
+ *
+ * Loads class using this supplied classloader.
+ *
+ *
+ * @param cls
+ * @param name String name of class.
+ * @return
+ * @throws ClassNotFoundException
+ */
+ public static Class<?> loadClass(final ClassLoader cls, final String name) throws ClassNotFoundException {
+ if ("byte[]".equals(name)) {
+ return byte[].class;
+ }
+ if ("char[]".equals(name)) {
+ return char[].class;
+ }
+
+ try {
+ return cls.loadClass(name);
+ } catch (ClassNotFoundException e) {
+ String[] components = name.split("\\.");
+ String potentialOuter;
+ int length = components.length;
+ if (length > 2 && (potentialOuter = components[length - 2]) != null && Character.isUpperCase(potentialOuter.charAt(0))) {
+ String outerName = Joiner.on(".").join(Arrays.asList(components).subList(0, length - 1));
+ String innerName = outerName + "$" + components[length-1];
+ return cls.loadClass(innerName);
+ } else {
+ throw e;
+ }
+ }
+ }
+
+ public static Class<?> loadClassWithTCCL(final String name) throws ClassNotFoundException {
+ return loadClass(Thread.currentThread().getContextClassLoader(), name);
+ }
+
+ public static Class<?> tryToLoadClassWithTCCL(final String fullyQualifiedName) {
+ try {
+ return loadClassWithTCCL(fullyQualifiedName);
+ } catch (ClassNotFoundException e) {
+ LOG.debug("Failed to load class {}", fullyQualifiedName, e);
+ return null;
+ }
+ }
+
+ public static <S,G,P> Class<P> findFirstGenericArgument(final Class<S> scannedClass, final Class<G> genericType) {
+ return withClassLoader(scannedClass.getClassLoader(), ClassLoaderUtils.<S,G,P>findFirstGenericArgumentTask(scannedClass, genericType));
+ }
+
+ private static <S,G,P> Supplier<Class<P>> findFirstGenericArgumentTask(final Class<S> scannedClass, final Class<G> genericType) {
+ return new Supplier<Class<P>>() {
+ @Override
+ @SuppressWarnings("unchecked")
+ public Class<P> get() {
+ final ParameterizedType augmentationGeneric = findParameterizedType(scannedClass, genericType);
+ if (augmentationGeneric != null) {
+ return (Class<P>) augmentationGeneric.getActualTypeArguments()[0];
+ }
+ return null;
+ }
+ };
+ }
+
+ public static ParameterizedType findParameterizedType(final Class<?> subclass, final Class<?> genericType) {
+ Preconditions.checkNotNull(subclass);
+ Preconditions.checkNotNull(genericType);
+
+ for (Type type : subclass.getGenericInterfaces()) {
+ if (type instanceof ParameterizedType && genericType.equals(((ParameterizedType) type).getRawType())) {
+ return (ParameterizedType) type;
+ }
+ }
+
+ LOG.debug("Class {} does not declare interface {}", subclass, genericType);
+ return null;
+ }
+
+ public static Type getFirstGenericParameter(final Type type) {
+ if (type instanceof ParameterizedType) {
+ return ((ParameterizedType) type).getActualTypeArguments()[0];
+ }
+ return null;
+ }
+}
Code Review / mdsal.git / blobdiff