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 java.beans.MethodDescriptor;
11 import java.lang.reflect.Field;
12 import java.lang.reflect.Method;
13 import java.lang.reflect.Type;
14 import java.util.concurrent.Callable;
15 import java.util.concurrent.Future;
16 import java.util.concurrent.TimeUnit;
17 import java.util.regex.MatchResult;
18 import java.util.regex.Matcher;
19 import java.util.regex.Pattern;
21 import org.opendaylight.yangtools.concepts.util.ClassLoaderUtils;
22 import org.opendaylight.yangtools.yang.binding.Augmentable;
23 import org.opendaylight.yangtools.yang.binding.Augmentation;
24 import org.opendaylight.yangtools.yang.binding.BaseIdentity;
25 import org.opendaylight.yangtools.yang.binding.BindingMapping;
26 import org.opendaylight.yangtools.yang.binding.ChildOf;
27 import org.opendaylight.yangtools.yang.binding.DataContainer;
28 import org.opendaylight.yangtools.yang.binding.DataObject;
29 import org.opendaylight.yangtools.yang.binding.Notification;
30 import org.opendaylight.yangtools.yang.binding.RpcService;
31 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
32 import org.opendaylight.yangtools.yang.binding.annotations.ModuleQName;
33 import org.opendaylight.yangtools.yang.common.QName;
35 import static com.google.common.base.Preconditions.*;
36 import static org.opendaylight.yangtools.concepts.util.ClassLoaderUtils.*;
38 import com.google.common.base.Optional;
39 import com.google.common.base.Preconditions;
40 import com.google.common.cache.CacheBuilder;
41 import com.google.common.cache.CacheLoader;
42 import com.google.common.cache.LoadingCache;
44 public class BindingReflections {
46 private static final long EXPIRATION_TIME = 60;
47 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])";
48 private static final Pattern ROOT_PACKAGE_PATTERN = Pattern.compile(ROOT_PACKAGE_PATTERN_STRING);
50 private static final LoadingCache<Class<?>, Optional<QName>> classToQName = CacheBuilder.newBuilder() //
52 .expireAfterAccess(EXPIRATION_TIME, TimeUnit.SECONDS) //
53 .build(new ClassToQNameLoader());
58 * {@link Augmentation} subclass for which we want to determine
59 * augmentation target.
60 * @return Augmentation target - class which augmentation provides
61 * additional extensions.
63 public static Class<? extends Augmentable<?>> findAugmentationTarget(
64 final Class<? extends Augmentation<?>> augmentation) {
65 return ClassLoaderUtils.findFirstGenericArgument(augmentation, Augmentation.class);
71 * {@link Augmentation} subclass for which we want to determine
72 * augmentation target.
73 * @return Augmentation target - class which augmentation provides
74 * additional extensions.
76 public static Class<?> findHierarchicalParent(final Class<? extends ChildOf<?>> childClass) {
77 return ClassLoaderUtils.findFirstGenericArgument(childClass, ChildOf.class);
83 * {@link Augmentation} subclass for which we want to determine
84 * augmentation target.
85 * @return Augmentation target - class which augmentation provides
86 * additional extensions.
88 public static Class<?> findHierarchicalParent(DataObject childClass) {
89 if (childClass instanceof ChildOf) {
90 return ClassLoaderUtils.findFirstGenericArgument(childClass.getImplementedInterface(), ChildOf.class);
95 public static final QName findQName(Class<?> dataType) {
96 return classToQName.getUnchecked(dataType).orNull();
99 private static class ClassToQNameLoader extends CacheLoader<Class<?>, Optional<QName>> {
102 public Optional<QName> load(Class<?> key) throws Exception {
104 Field field = key.getField(BindingMapping.QNAME_STATIC_FIELD_NAME);
105 Object obj = field.get(null);
106 if (obj instanceof QName) {
107 return Optional.of((QName) obj);
109 } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
112 return Optional.absent();
116 public static boolean isRpcMethod(Method possibleMethod) {
117 return possibleMethod != null && RpcService.class.isAssignableFrom(possibleMethod.getDeclaringClass())
118 && Future.class.isAssignableFrom(possibleMethod.getReturnType())
119 && possibleMethod.getParameterTypes().length <= 1;
122 @SuppressWarnings("rawtypes")
123 public static Optional<Class<?>> resolveRpcOutputClass(Method targetMethod) {
124 checkState(isRpcMethod(targetMethod), "Supplied method is not Rpc invocation method");
125 Type futureType = targetMethod.getGenericReturnType();
126 Type rpcResultType = ClassLoaderUtils.getFirstGenericParameter(futureType);
127 Type rpcResultArgument = ClassLoaderUtils.getFirstGenericParameter(rpcResultType);
128 if (rpcResultArgument instanceof Class && !Void.class.equals(rpcResultArgument)) {
129 return Optional.<Class<?>> of((Class) rpcResultArgument);
131 return Optional.absent();
134 @SuppressWarnings("unchecked")
135 public static Optional<Class<? extends DataContainer>> resolveRpcInputClass(Method targetMethod) {
136 @SuppressWarnings("rawtypes")
137 Class[] types = targetMethod.getParameterTypes();
138 if (types.length == 0) {
139 return Optional.absent();
141 if (types.length == 1) {
142 return Optional.<Class<? extends DataContainer>> of(types[0]);
144 throw new IllegalArgumentException("Method has 2 or more arguments.");
147 public static QName getQName(Class<? extends BaseIdentity> context) {
148 return findQName(context);
151 public static boolean isAugmentationChild(Class<?> clazz) {
152 // FIXME: Current resolver could be still confused when
153 // child node was added by grouping
154 checkArgument(clazz != null);
155 @SuppressWarnings({ "rawtypes", "unchecked" })
156 Class<?> parent = findHierarchicalParent((Class) clazz);
157 String clazzModelPackage = getModelRootPackageName(clazz.getPackage());
158 String parentModelPackage = getModelRootPackageName(parent.getPackage());
160 return !clazzModelPackage.equals(parentModelPackage);
163 public static String getModelRootPackageName(Package pkg) {
164 return getModelRootPackageName(pkg.getName());
167 public static String getModelRootPackageName(String name) {
168 checkArgument(name != null, "Package name should not be null.");
169 checkArgument(name.startsWith(BindingMapping.PACKAGE_PREFIX));
170 Matcher match = ROOT_PACKAGE_PATTERN.matcher(name);
171 checkArgument(match.find());
172 String rootPackage = match.group(0);
176 public static YangModuleInfo getModuleInfo(final Class<?> cls) throws Exception {
177 checkArgument(cls != null);
178 String packageName = getModelRootPackageName(cls.getPackage());
179 final String potentialClassName = getModuleInfoClassName(packageName);
180 return withClassLoader(cls.getClassLoader(), new Callable<YangModuleInfo>() {
183 public YangModuleInfo call() throws Exception {
184 Class<?> moduleInfoClass = Thread.currentThread().getContextClassLoader().loadClass(potentialClassName);
185 return (YangModuleInfo) moduleInfoClass.getMethod("getInstance").invoke(null);
190 public static String getModuleInfoClassName(String packageName) {
191 return packageName + "." + BindingMapping.MODULE_INFO_CLASS_NAME;
194 public static boolean isBindingClass(Class<?> cls) {
195 if (DataContainer.class.isAssignableFrom(cls) || Augmentation.class.isAssignableFrom(cls)) {
198 return (cls.getName().startsWith(BindingMapping.PACKAGE_PREFIX));
201 public static boolean isNotificationCallback(Method method) {
202 checkArgument(method != null);
203 if (method.getName().startsWith("on") && method.getParameterTypes().length == 1) {
204 Class<?> potentialNotification = method.getParameterTypes()[0];
205 if (isNotification(potentialNotification)
206 && method.getName().equals("on" + potentialNotification.getSimpleName())) {
213 public static boolean isNotification(Class<?> potentialNotification) {
214 checkArgument(potentialNotification != null);
215 return Notification.class.isAssignableFrom(potentialNotification);