import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
+import com.google.common.base.Optional;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.ImmutableSet.Builder;
+import com.google.common.collect.Sets;
+
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
+import java.util.Map;
import java.util.ServiceLoader;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.google.common.base.Optional;
-import com.google.common.cache.CacheBuilder;
-import com.google.common.cache.CacheLoader;
-import com.google.common.cache.LoadingCache;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.ImmutableSet.Builder;
-
public class BindingReflections {
private static final long EXPIRATION_TIME = 60;
.expireAfterAccess(EXPIRATION_TIME, TimeUnit.SECONDS) //
.build(new ClassToQNameLoader());
+
+
+ private BindingReflections() {
+ throw new UnsupportedOperationException("Utility class.");
+ }
+
/**
+ * Find augmentation target class from concrete Augmentation class
+ *
+ * This method uses first generic argument of
+ * implemented {@link Augmentation} interface.
*
* @param augmentation
* {@link Augmentation} subclass for which we want to determine
}
/**
+ * Find data hierarchy parent from concrete Data class
+ *
+ * This method uses first generic argument of
+ * implemented {@link ChildOf} interface.
*
* @param augmentation
* {@link Augmentation} subclass for which we want to determine
}
/**
+ * Find data hierarchy parent from concrete Data class
*
- * @param augmentation
+ * This method is shorthand which gets DataObject class by invoking
+ * {@link DataObject#getImplementedInterface()} and uses {@link #findHierarchicalParent(Class)}.
+ *
+ * @param childClass
* {@link Augmentation} subclass for which we want to determine
* augmentation target.
* @return Augmentation target - class which augmentation provides
* additional extensions.
*/
- public static Class<?> findHierarchicalParent(final DataObject childClass) {
- if (childClass instanceof ChildOf) {
- return ClassLoaderUtils.findFirstGenericArgument(childClass.getImplementedInterface(), ChildOf.class);
+ public static Class<?> findHierarchicalParent(final DataObject child) {
+ if (child instanceof ChildOf) {
+ return ClassLoaderUtils.findFirstGenericArgument(child.getImplementedInterface(), ChildOf.class);
}
return null;
}
* Augmentation method does not return canonical QName, but QName
* with correct namespace revision, but virtual local name, since
* augmentations do not have name.
+ *
+ * May return null if QName is not present.
*/
public static final QName findQName(final Class<?> dataType) {
return classToQName.getUnchecked(dataType).orNull();
}
- private static class ClassToQNameLoader extends CacheLoader<Class<?>, Optional<QName>> {
-
- @Override
- public Optional<QName> load(final Class<?> key) throws Exception {
- try {
- Field field = key.getField(BindingMapping.QNAME_STATIC_FIELD_NAME);
- Object obj = field.get(null);
- if (obj instanceof QName) {
- return Optional.of((QName) obj);
- }
- } catch (NoSuchFieldException e) {
- if (Augmentation.class.isAssignableFrom(key)) {
- YangModuleInfo moduleInfo = getModuleInfo(key);
- return Optional.of(QName.create(moduleInfo.getNamespace(), moduleInfo.getRevision(),
- moduleInfo.getName()));
- }
- } catch (SecurityException | IllegalArgumentException | IllegalAccessException e) {
- // NOOP
- }
- return Optional.absent();
- }
- }
-
+ /**
+ * Checks if method is RPC invocation
+ *
+ *
+ *
+ * @param possibleMethod Method to check
+ * @return true if method is RPC invocation, false otherwise.
+ */
public static boolean isRpcMethod(final Method possibleMethod) {
return possibleMethod != null && RpcService.class.isAssignableFrom(possibleMethod.getDeclaringClass())
&& Future.class.isAssignableFrom(possibleMethod.getReturnType())
&& possibleMethod.getParameterTypes().length <= 1;
}
+ /**
+ *
+ * Extracts Output class for RPC method
+ *
+ * @param targetMethod method to scan
+ * @return Optional.absent() if result type could not be get,
+ * or return type is Void.
+ */
@SuppressWarnings("rawtypes")
public static Optional<Class<?>> resolveRpcOutputClass(final Method targetMethod) {
checkState(isRpcMethod(targetMethod), "Supplied method is not Rpc invocation method");
return Optional.absent();
}
+ /**
+ *
+ * Extracts input class for RPC method
+ *
+ * @param targetMethod method to scan
+ * @return Optional.absent() if rpc has no input, Rpc input type otherwise.
+ */
@SuppressWarnings("unchecked")
public static Optional<Class<? extends DataContainer>> resolveRpcInputClass(final Method targetMethod) {
@SuppressWarnings("rawtypes")
return findQName(context);
}
+ /**
+ *
+ * Checks if class is child of augmentation.
+ *
+ *
+ * @param clazz
+ * @return
+ */
public static boolean isAugmentationChild(final Class<?> clazz) {
// FIXME: Current resolver could be still confused when
// child node was added by grouping
return !clazzModelPackage.equals(parentModelPackage);
}
+ /**
+ * Returns root package name for suplied package.
+ *
+ * @param pkg Package for which find model root package.
+ * @return Package of model root.
+ */
public static String getModelRootPackageName(final Package pkg) {
return getModelRootPackageName(pkg.getName());
}
+ /**
+ * Returns root package name for suplied package name.
+ *
+ * @param pkg Package for which find model root package.
+ * @return Package of model root.
+ */
public static String getModelRootPackageName(final String name) {
checkArgument(name != null, "Package name should not be null.");
checkArgument(name.startsWith(BindingMapping.PACKAGE_PREFIX), "Package name not starting with %s, is: %s",
return match.group(0);
}
+ /**
+ *
+ * Returns instance of {@link YangModuleInfo} of declaring model for specific class.
+ *
+ * @param cls
+ * @return Instance of {@link YangModuleInfo} associated with model, from which this class was derived.
+ * @throws Exception
+ */
public static YangModuleInfo getModuleInfo(final Class<?> cls) throws Exception {
checkArgument(cls != null);
String packageName = getModelRootPackageName(cls.getPackage());
return packageName + "." + BindingMapping.MODULE_INFO_CLASS_NAME;
}
+ /**
+ *
+ * Check if supplied class is derived from YANG model.
+ *
+ * @param cls Class to check
+ * @return true if class is derived from YANG model.
+ */
public static boolean isBindingClass(final Class<?> cls) {
if (DataContainer.class.isAssignableFrom(cls) || Augmentation.class.isAssignableFrom(cls)) {
return true;
return (cls.getName().startsWith(BindingMapping.PACKAGE_PREFIX));
}
+ /**
+ *
+ * Checks if supplied method is callback for notifications.
+ *
+ * @param method
+ * @return true if method is notification callback.
+ */
public static boolean isNotificationCallback(final Method method) {
checkArgument(method != null);
if (method.getName().startsWith("on") && method.getParameterTypes().length == 1) {
return false;
}
+ /**
+ *
+ * Checks is supplied class is Notification.
+ *
+ * @param potentialNotification
+ * @return
+ */
public static boolean isNotification(final Class<?> potentialNotification) {
- checkArgument(potentialNotification != null);
+ checkArgument(potentialNotification != null,"potentialNotification must not be null.");
return Notification.class.isAssignableFrom(potentialNotification);
}
+ /**
+ *
+ * Loads {@link YangModuleInfo} infos available on current classloader.
+ *
+ * This method is shorthand for {@link #loadModuleInfos(ClassLoader)} with
+ * {@link Thread#getContextClassLoader()} for current thread.
+ *
+ * @return Set of {@link YangModuleInfo} available for current classloader.
+ */
public static ImmutableSet<YangModuleInfo> loadModuleInfos() {
return loadModuleInfos(Thread.currentThread().getContextClassLoader());
}
+ /**
+ *
+ * Loads {@link YangModuleInfo} infos available on supplied classloader.
+ *
+ * {@link YangModuleInfo} are discovered using {@link ServiceLoader}
+ * for {@link YangModelBindingProvider}. {@link YangModelBindingProvider}
+ * are simple classes which holds only pointers to actual instance
+ * {@link YangModuleInfo}.
+ *
+ * When {@link YangModuleInfo} is available, all dependencies are recursivelly collected
+ * into returning set by collecting results of {@link YangModuleInfo#getImportedModules()}.
+ *
+ *
+ * @param loader Classloader for which {@link YangModuleInfo} should be retrieved.
+ * @return Set of {@link YangModuleInfo} available for supplied classloader.
+ */
public static ImmutableSet<YangModuleInfo> loadModuleInfos(final ClassLoader loader) {
Builder<YangModuleInfo> moduleInfoSet = ImmutableSet.<YangModuleInfo> builder();
ServiceLoader<YangModelBindingProvider> serviceLoader = ServiceLoader.load(YangModelBindingProvider.class,
}
}
+ /**
+ *
+ * Checks if supplied class represents RPC Input / RPC Output.
+ *
+ * @param targetType Class to be checked
+ * @return true if class represents RPC Input or RPC Output class.
+ */
public static boolean isRpcType(final Class<? extends DataObject> targetType) {
return DataContainer.class.isAssignableFrom(targetType) //
&& !ChildOf.class.isAssignableFrom(targetType) //
return ret;
}
+ /**
+ *
+ * Scans supplied class and returns an iterable of all data children classes.
+ *
+ * @param type YANG Modeled Entity derived from DataContainer
+ * @return Iterable of all data children, which have YANG modeled entity
+ */
+ @SuppressWarnings("unchecked")
+ public static Map<Class<?>,Method> getChildrenClassToMethod(final Class<?> type) {
+ checkArgument(type != null, "Target type must not be null");
+ checkArgument(DataContainer.class.isAssignableFrom(type), "Supplied type must be derived from DataContainer");
+ Map<Class<?>,Method> ret = new HashMap<>();
+ for (Method method : type.getMethods()) {
+ Optional<Class<? extends DataContainer>> entity = getYangModeledReturnType(method);
+ if (entity.isPresent()) {
+ ret.put(entity.get(),method);
+ }
+ }
+ return ret;
+ }
+
@SuppressWarnings("unchecked")
private static Optional<Class<? extends DataContainer>> getYangModeledReturnType(final Method method) {
if (method.getName().equals("getClass") || !method.getName().startsWith("get")
});
} catch (Exception e) {
+ /*
+ *
+ * It is safe to log this this exception on debug, since
+ * this method should not fail. Only failures are possible if
+ * the runtime / backing.
+ *
+ */
LOG.debug("Unable to find YANG modeled return type for {}", method, e);
}
}
return Optional.absent();
}
+ private static class ClassToQNameLoader extends CacheLoader<Class<?>, Optional<QName>> {
+
+ @Override
+ public Optional<QName> load(final Class<?> key) throws Exception {
+ return resolveQNameNoCache(key);
+ }
+ }
+
+ /**
+ *
+ * Tries to resolve QName for supplied class.
+ *
+ * Looks up for static field with name from constant {@link BindingMapping#QNAME_STATIC_FIELD_NAME}
+ * and returns value if present.
+ *
+ * If field is not present uses {@link #computeQName(Class)} to compute QName for missing types.
+ *
+ * @param key
+ * @return
+ */
+ private static Optional<QName> resolveQNameNoCache(final Class<?> key) {
+ try {
+ Field field = key.getField(BindingMapping.QNAME_STATIC_FIELD_NAME);
+ Object obj = field.get(null);
+ if (obj instanceof QName) {
+ return Optional.of((QName) obj);
+ }
+
+ } catch (NoSuchFieldException e) {
+ return Optional.of(computeQName(key));
+
+ } catch (SecurityException | IllegalArgumentException | IllegalAccessException e) {
+ /*
+ *
+ * It is safe to log this this exception on debug, since
+ * this method should not fail. Only failures are possible if
+ * the runtime / backing.
+ *
+ */
+ LOG.debug("Unexpected exception during extracting QName for {}",key,e);
+ }
+ return Optional.absent();
+ }
+
+ /**
+ * Computes QName for supplied class
+ *
+ * Namespace and revision are same as {@link YangModuleInfo}
+ * associated with supplied class.
+ * <p>
+ * If class is
+ * <ul>
+ * <li>rpc input: local name is "input".
+ * <li>rpc output: local name is "output".
+ * <li>augmentation: local name is "module name".
+ * </ul>
+ *
+ * There is also fallback, if it is not possible to compute QName
+ * using following algorithm returns module QName.
+ *
+ * FIXME: Extend this algorithm to also provide QName for YANG modeled simple types.
+ *
+ * @throws IllegalStateException If YangModuleInfo could not be resolved
+ * @throws IllegalArgumentException If supplied class was not derived from YANG model.
+ *
+ */
+ @SuppressWarnings({ "rawtypes", "unchecked" })
+ private static QName computeQName(final Class key) {
+ if(isBindingClass(key)) {
+ YangModuleInfo moduleInfo;
+ try {
+ moduleInfo = getModuleInfo(key);
+ } catch (Exception e) {
+ throw new IllegalStateException("Unable to get QName for " + key + ". YangModuleInfo was not found.",e);
+ }
+ final QName module = getModuleQName(moduleInfo);
+ if (Augmentation.class.isAssignableFrom(key)) {
+ return module;
+ } else if(isRpcType(key)) {
+ final String className = key.getSimpleName();
+ if(className.endsWith(BindingMapping.RPC_OUTPUT_SUFFIX)) {
+ return QName.create(module,"output");
+ } else {
+ return QName.create(module,"input");
+ }
+ }
+ /*
+ * Fallback for Binding types which fo not have QNAME
+ * field
+ */
+ return module;
+ } else {
+ throw new IllegalArgumentException("Supplied class "+key+"is not derived from YANG.");
+ }
+ }
+
+ /**
+ * Given a {@link YangModuleInfo}, create a QName representing it. The QName
+ * is formed by reusing the module's namespace and revision using the module's
+ * name as the QName's local name.
+ *
+ * @param moduleInfo module information
+ * @return QName representing the module
+ */
+ public static QName getModuleQName(final YangModuleInfo moduleInfo) {
+ checkArgument(moduleInfo != null, "moduleInfo must not be null.");
+ return QName.create(moduleInfo.getNamespace(), moduleInfo.getRevision(),
+ moduleInfo.getName());
+ }
+
+ /**
+ * Extracts augmentation from Binding DTO field using reflection
+ *
+ * @param input Instance of DataObject which is augmentable and
+ * may contain augmentation
+ * @return Map of augmentations if read was successful, otherwise
+ * empty map.
+ */
+ public static Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAugmentations(final Augmentable<?> input) {
+ return AugmentationFieldGetter.getGetter(input.getClass()).getAugmentations(input);
+ }
+
+ /**
+ *
+ * Determines if two augmentation classes or case classes represents same data.
+ * <p>
+ * Two augmentations or cases could be substituted only if and if:
+ * <ul>
+ * <li>Both implements same interfaces</li>
+ * <li>Both have same children</li>
+ * <li>If augmentations: Both have same augmentation target class. Target class was generated for data node in grouping.</li>
+ * <li>If cases: Both are from same choice. Choice class was generated for data node in grouping.</li>
+ * </ul>
+ * <p>
+ * <b>Explanation:</b> Binding Specification reuses classes generated for groupings as part of normal data tree,
+ * this classes from grouping could be used at various locations and user may not be aware of it
+ * and may use incorrect case or augmentation in particular subtree (via copy constructors, etc).
+ *
+ * @param potential Class which is potential substition
+ * @param target Class which should be used at particular subtree
+ * @return true if and only if classes represents same data.
+ */
+ @SuppressWarnings({"rawtypes","unchecked"})
+ public static boolean isSubstitutionFor(Class potential, Class target) {
+ HashSet<Class> subImplemented = Sets.newHashSet(potential.getInterfaces());
+ HashSet<Class> targetImplemented = Sets.newHashSet(target.getInterfaces());
+ if(!subImplemented.equals(targetImplemented)) {
+ return false;
+ }
+ if(Augmentation.class.isAssignableFrom(potential)
+ && !BindingReflections.findAugmentationTarget(potential).equals(BindingReflections.findAugmentationTarget(target))) {
+ return false;
+ }
+ for(Method potentialMethod : potential.getMethods()) {
+ try {
+ Method targetMethod = target.getMethod(potentialMethod.getName(), potentialMethod.getParameterTypes());
+ if(!potentialMethod.getReturnType().equals(targetMethod.getReturnType())) {
+ return false;
+ }
+ } catch (NoSuchMethodException e) {
+ // Counterpart method is missing, so classes could not be substituted.
+ return false;
+ } catch (SecurityException e) {
+ throw new IllegalStateException("Could not compare methods",e);
+ }
+ }
+ return true;
+ }
}
Code Review / yangtools.git / blobdiff