2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.binding.util;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Preconditions.checkState;
12 import static org.opendaylight.yangtools.concepts.util.ClassLoaderUtils.withClassLoader;
14 import java.lang.reflect.Field;
15 import java.lang.reflect.Method;
16 import java.lang.reflect.Type;
17 import java.util.ServiceLoader;
18 import java.util.concurrent.Callable;
19 import java.util.concurrent.Future;
20 import java.util.concurrent.TimeUnit;
21 import java.util.regex.Matcher;
22 import java.util.regex.Pattern;
24 import org.opendaylight.yangtools.concepts.util.ClassLoaderUtils;
25 import org.opendaylight.yangtools.yang.binding.Augmentable;
26 import org.opendaylight.yangtools.yang.binding.Augmentation;
27 import org.opendaylight.yangtools.yang.binding.BaseIdentity;
28 import org.opendaylight.yangtools.yang.binding.BindingMapping;
29 import org.opendaylight.yangtools.yang.binding.ChildOf;
30 import org.opendaylight.yangtools.yang.binding.DataContainer;
31 import org.opendaylight.yangtools.yang.binding.DataObject;
32 import org.opendaylight.yangtools.yang.binding.Notification;
33 import org.opendaylight.yangtools.yang.binding.RpcService;
34 import org.opendaylight.yangtools.yang.binding.YangModelBindingProvider;
35 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
36 import org.opendaylight.yangtools.yang.common.QName;
38 import com.google.common.base.Optional;
39 import com.google.common.cache.CacheBuilder;
40 import com.google.common.cache.CacheLoader;
41 import com.google.common.cache.LoadingCache;
42 import com.google.common.collect.ImmutableSet;
43 import com.google.common.collect.ImmutableSet.Builder;
45 public class BindingReflections {
47 private static final long EXPIRATION_TIME = 60;
48 private static final String ROOT_PACKAGE_PATTERN_STRING = "(org.opendaylight.yang.gen.v1.[a-z0-9_\\.]*\\.rev[0-9][0-9][0-1][0-9][0-3][0-9])";
49 private static final Pattern ROOT_PACKAGE_PATTERN = Pattern.compile(ROOT_PACKAGE_PATTERN_STRING);
51 private static final LoadingCache<Class<?>, Optional<QName>> classToQName = CacheBuilder.newBuilder() //
53 .expireAfterAccess(EXPIRATION_TIME, TimeUnit.SECONDS) //
54 .build(new ClassToQNameLoader());
59 * {@link Augmentation} subclass for which we want to determine
60 * augmentation target.
61 * @return Augmentation target - class which augmentation provides
62 * additional extensions.
64 public static Class<? extends Augmentable<?>> findAugmentationTarget(
65 final Class<? extends Augmentation<?>> augmentation) {
66 return ClassLoaderUtils.findFirstGenericArgument(augmentation, Augmentation.class);
72 * {@link Augmentation} subclass for which we want to determine
73 * augmentation target.
74 * @return Augmentation target - class which augmentation provides
75 * additional extensions.
77 public static Class<?> findHierarchicalParent(final Class<? extends ChildOf<?>> childClass) {
78 return ClassLoaderUtils.findFirstGenericArgument(childClass, ChildOf.class);
84 * {@link Augmentation} subclass for which we want to determine
85 * augmentation target.
86 * @return Augmentation target - class which augmentation provides
87 * additional extensions.
89 public static Class<?> findHierarchicalParent(final DataObject childClass) {
90 if (childClass instanceof ChildOf) {
91 return ClassLoaderUtils.findFirstGenericArgument(childClass.getImplementedInterface(), ChildOf.class);
97 * Returns a QName associated to supplied type
100 * @return QName associated to supplied dataType. If dataType is Augmentation
101 * method does not return canonical QName, but QName with correct namespace
102 * revision, but virtual local name, since augmentations do not have name.
104 public static final QName findQName(final Class<?> dataType) {
105 return classToQName.getUnchecked(dataType).orNull();
108 private static class ClassToQNameLoader extends CacheLoader<Class<?>, Optional<QName>> {
111 public Optional<QName> load(final Class<?> key) throws Exception {
113 Field field = key.getField(BindingMapping.QNAME_STATIC_FIELD_NAME);
114 Object obj = field.get(null);
115 if (obj instanceof QName) {
116 return Optional.of((QName) obj);
118 } catch (NoSuchFieldException e) {
119 if(Augmentation.class.isAssignableFrom(key)) {
120 YangModuleInfo moduleInfo = getModuleInfo(key);
121 return Optional.of(QName.create(moduleInfo.getNamespace(), moduleInfo.getRevision(), moduleInfo.getName()));
124 } catch (SecurityException | IllegalArgumentException | IllegalAccessException e) {
127 return Optional.absent();
131 public static boolean isRpcMethod(final Method possibleMethod) {
132 return possibleMethod != null && RpcService.class.isAssignableFrom(possibleMethod.getDeclaringClass())
133 && Future.class.isAssignableFrom(possibleMethod.getReturnType())
134 && possibleMethod.getParameterTypes().length <= 1;
137 @SuppressWarnings("rawtypes")
138 public static Optional<Class<?>> resolveRpcOutputClass(final Method targetMethod) {
139 checkState(isRpcMethod(targetMethod), "Supplied method is not Rpc invocation method");
140 Type futureType = targetMethod.getGenericReturnType();
141 Type rpcResultType = ClassLoaderUtils.getFirstGenericParameter(futureType);
142 Type rpcResultArgument = ClassLoaderUtils.getFirstGenericParameter(rpcResultType);
143 if (rpcResultArgument instanceof Class && !Void.class.equals(rpcResultArgument)) {
144 return Optional.<Class<?>> of((Class) rpcResultArgument);
146 return Optional.absent();
149 @SuppressWarnings("unchecked")
150 public static Optional<Class<? extends DataContainer>> resolveRpcInputClass(final Method targetMethod) {
151 @SuppressWarnings("rawtypes")
152 Class[] types = targetMethod.getParameterTypes();
153 if (types.length == 0) {
154 return Optional.absent();
156 if (types.length == 1) {
157 return Optional.<Class<? extends DataContainer>> of(types[0]);
159 throw new IllegalArgumentException("Method has 2 or more arguments.");
162 public static QName getQName(final Class<? extends BaseIdentity> context) {
163 return findQName(context);
166 public static boolean isAugmentationChild(final Class<?> clazz) {
167 // FIXME: Current resolver could be still confused when
168 // child node was added by grouping
169 checkArgument(clazz != null);
170 @SuppressWarnings({ "rawtypes", "unchecked" })
171 Class<?> parent = findHierarchicalParent((Class) clazz);
172 String clazzModelPackage = getModelRootPackageName(clazz.getPackage());
173 String parentModelPackage = getModelRootPackageName(parent.getPackage());
175 return !clazzModelPackage.equals(parentModelPackage);
178 public static String getModelRootPackageName(final Package pkg) {
179 return getModelRootPackageName(pkg.getName());
182 public static String getModelRootPackageName(final String name) {
183 checkArgument(name != null, "Package name should not be null.");
184 checkArgument(name.startsWith(BindingMapping.PACKAGE_PREFIX), "Package name not starting with %s, is: %s",
185 BindingMapping.PACKAGE_PREFIX, name);
186 Matcher match = ROOT_PACKAGE_PATTERN.matcher(name);
187 checkArgument(match.find(),"Package name '%s' does not match required pattern '%s'",name,ROOT_PACKAGE_PATTERN_STRING);
188 return match.group(0);
191 public static YangModuleInfo getModuleInfo(final Class<?> cls) throws Exception {
192 checkArgument(cls != null);
193 String packageName = getModelRootPackageName(cls.getPackage());
194 final String potentialClassName = getModuleInfoClassName(packageName);
195 return withClassLoader(cls.getClassLoader(), new Callable<YangModuleInfo>() {
198 public YangModuleInfo call() throws Exception {
199 Class<?> moduleInfoClass = Thread.currentThread().getContextClassLoader().loadClass(potentialClassName);
200 return (YangModuleInfo) moduleInfoClass.getMethod("getInstance").invoke(null);
205 public static String getModuleInfoClassName(final String packageName) {
206 return packageName + "." + BindingMapping.MODULE_INFO_CLASS_NAME;
209 public static boolean isBindingClass(final Class<?> cls) {
210 if (DataContainer.class.isAssignableFrom(cls) || Augmentation.class.isAssignableFrom(cls)) {
213 return (cls.getName().startsWith(BindingMapping.PACKAGE_PREFIX));
216 public static boolean isNotificationCallback(final Method method) {
217 checkArgument(method != null);
218 if (method.getName().startsWith("on") && method.getParameterTypes().length == 1) {
219 Class<?> potentialNotification = method.getParameterTypes()[0];
220 if (isNotification(potentialNotification)
221 && method.getName().equals("on" + potentialNotification.getSimpleName())) {
228 public static boolean isNotification(final Class<?> potentialNotification) {
229 checkArgument(potentialNotification != null);
230 return Notification.class.isAssignableFrom(potentialNotification);
233 public static ImmutableSet<YangModuleInfo> loadModuleInfos() {
234 return loadModuleInfos(Thread.currentThread().getContextClassLoader());
237 public static ImmutableSet<YangModuleInfo> loadModuleInfos(final ClassLoader loader) {
238 Builder<YangModuleInfo> moduleInfoSet = ImmutableSet.<YangModuleInfo>builder();
239 ServiceLoader<YangModelBindingProvider> serviceLoader = ServiceLoader.load(YangModelBindingProvider.class, loader);
240 for(YangModelBindingProvider bindingProvider : serviceLoader) {
241 YangModuleInfo moduleInfo = bindingProvider.getModuleInfo();
242 checkState(moduleInfo != null, "Module Info for %s is not available.",bindingProvider.getClass());
243 collectYangModuleInfo(bindingProvider.getModuleInfo(),moduleInfoSet);
245 return moduleInfoSet.build();
248 private static void collectYangModuleInfo(final YangModuleInfo moduleInfo, final Builder<YangModuleInfo> moduleInfoSet) {
249 moduleInfoSet.add(moduleInfo);
250 for(YangModuleInfo dependency : moduleInfo.getImportedModules()) {
251 collectYangModuleInfo(dependency, moduleInfoSet);
255 public static boolean isRpcType(final Class<? extends DataObject> targetType) {
256 return DataContainer.class.isAssignableFrom(targetType) //
257 && !ChildOf.class.isAssignableFrom(targetType) //
258 && !Notification.class.isAssignableFrom(targetType) //
259 && (targetType.getName().endsWith("Input") || targetType.getName().endsWith("Output"));