2 * Copyright (c) 2015 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.mdsal.binding.dom.codec.impl;
10 import static com.google.common.base.Preconditions.checkState;
11 import static net.bytebuddy.implementation.bytecode.member.MethodVariableAccess.loadThis;
12 import static org.opendaylight.mdsal.binding.dom.codec.impl.ByteBuddyUtils.getField;
13 import static org.opendaylight.mdsal.binding.dom.codec.impl.ByteBuddyUtils.putField;
15 import com.google.common.base.Throwables;
16 import java.lang.invoke.MethodHandle;
17 import java.lang.invoke.MethodHandles;
18 import java.lang.invoke.MethodType;
19 import java.time.Instant;
20 import net.bytebuddy.ByteBuddy;
21 import net.bytebuddy.description.method.MethodDescription;
22 import net.bytebuddy.description.method.MethodDescription.InGenericShape;
23 import net.bytebuddy.description.type.TypeDefinition;
24 import net.bytebuddy.description.type.TypeDescription;
25 import net.bytebuddy.description.type.TypeDescription.Generic;
26 import net.bytebuddy.dynamic.scaffold.InstrumentedType;
27 import net.bytebuddy.dynamic.scaffold.subclass.ConstructorStrategy;
28 import net.bytebuddy.implementation.Implementation;
29 import net.bytebuddy.implementation.bytecode.ByteCodeAppender;
30 import net.bytebuddy.implementation.bytecode.StackManipulation;
31 import net.bytebuddy.implementation.bytecode.member.MethodInvocation;
32 import net.bytebuddy.implementation.bytecode.member.MethodReturn;
33 import net.bytebuddy.implementation.bytecode.member.MethodVariableAccess;
34 import net.bytebuddy.jar.asm.Opcodes;
35 import net.bytebuddy.matcher.ElementMatchers;
36 import org.eclipse.jdt.annotation.NonNull;
37 import org.opendaylight.mdsal.binding.dom.codec.loader.CodecClassLoader.GeneratorResult;
38 import org.opendaylight.yangtools.yang.binding.DataObject;
39 import org.opendaylight.yangtools.yang.binding.EventInstantAware;
40 import org.opendaylight.yangtools.yang.binding.Notification;
41 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
42 import org.opendaylight.yangtools.yang.data.api.schema.DistinctNodeContainer;
43 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
44 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
46 final class NotificationCodecContext<D extends DataObject & Notification>
47 extends DataObjectCodecContext<D, NotificationDefinition> {
48 private static final Generic EVENT_INSTANT_AWARE = TypeDefinition.Sort.describe(EventInstantAware.class);
50 private static final String EVENT_INSTANT_NAME;
51 private static final Generic EVENT_INSTANT_RETTYPE;
54 final MethodDescription eventInstance = EVENT_INSTANT_AWARE.getDeclaredMethods().getOnly();
55 EVENT_INSTANT_NAME = eventInstance.getName();
56 EVENT_INSTANT_RETTYPE = eventInstance.getReturnType();
59 private static final Generic BB_DOCC = TypeDefinition.Sort.describe(DataObjectCodecContext.class);
60 private static final Generic BB_DNC = TypeDefinition.Sort.describe(DistinctNodeContainer.class);
61 private static final Generic BB_I = TypeDefinition.Sort.describe(Instant.class);
63 private static final MethodType CONSTRUCTOR_TYPE = MethodType.methodType(void.class, DataObjectCodecContext.class,
64 DistinctNodeContainer.class, Instant.class);
65 private static final MethodType NOTIFICATION_TYPE = MethodType.methodType(Notification.class,
66 NotificationCodecContext.class, ContainerNode.class, Instant.class);
67 private static final String INSTANT_FIELD = "instant";
69 private final MethodHandle eventProxy;
71 NotificationCodecContext(final Class<?> key, final NotificationDefinition schema,
72 final CodecContextFactory factory) {
73 super(DataContainerCodecPrototype.from(key, schema, factory));
74 final Class<D> bindingClass = getBindingClass();
76 final Class<?> awareClass = factory().getLoader().generateClass(bindingClass, "eventInstantAware",
77 (loader, fqcn, bindingInterface) -> {
78 final Class<?> codecImpl = loader.getGeneratedClass(bindingClass, "codecImpl");
80 return GeneratorResult.of(new ByteBuddy()
81 .subclass(codecImpl, ConstructorStrategy.Default.NO_CONSTRUCTORS)
82 .implement(EVENT_INSTANT_AWARE)
84 .defineField(INSTANT_FIELD, BB_I, Opcodes.ACC_PRIVATE | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC)
85 .defineConstructor(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC)
86 .withParameters(BB_DOCC, BB_DNC, BB_I)
87 .intercept(ConstructorImplementation.INSTANCE)
88 .defineMethod(EVENT_INSTANT_NAME, EVENT_INSTANT_RETTYPE, Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC)
89 .intercept(EventInstantImplementation.INSTANCE)
93 final MethodHandle ctor;
95 ctor = MethodHandles.publicLookup().findConstructor(awareClass, CONSTRUCTOR_TYPE);
96 } catch (IllegalAccessException | NoSuchMethodException e) {
97 throw new LinkageError("Failed to acquire constructor", e);
99 eventProxy = ctor.asType(NOTIFICATION_TYPE);
103 public D deserialize(final NormalizedNode data) {
104 checkState(data instanceof ContainerNode, "Unexpected data %s", data);
105 return createBindingProxy((ContainerNode) data);
108 @SuppressWarnings("checkstyle:illegalCatch")
109 Notification deserialize(final @NonNull ContainerNode data, final @NonNull Instant eventInstant) {
111 return (Notification) eventProxy.invokeExact(this, data, eventInstant);
112 } catch (final Throwable e) {
113 Throwables.throwIfUnchecked(e);
114 throw new IllegalStateException(e);
119 protected Object deserializeObject(final NormalizedNode normalizedNode) {
120 return deserialize(normalizedNode);
123 private enum ConstructorImplementation implements Implementation {
126 private static final StackManipulation LOAD_INSTANT_ARG = MethodVariableAccess.REFERENCE.loadFrom(3);
127 private static final StackManipulation LOAD_CTOR_ARGS;
131 LOAD_CTOR_ARGS = MethodVariableAccess.allArgumentsOf(new MethodDescription.ForLoadedConstructor(
132 AugmentableCodecDataObject.class.getDeclaredConstructor(DataObjectCodecContext.class,
133 DistinctNodeContainer.class)));
134 } catch (NoSuchMethodException e) {
135 throw new ExceptionInInitializerError(e);
140 public InstrumentedType prepare(final InstrumentedType instrumentedType) {
141 return instrumentedType;
145 public ByteCodeAppender appender(final Target implementationTarget) {
146 final TypeDescription instrumentedType = implementationTarget.getInstrumentedType();
147 final InGenericShape superCtor = instrumentedType.getSuperClass().getDeclaredMethods()
148 .filter(ElementMatchers.isConstructor()).getOnly();
150 return new ByteCodeAppender.Simple(
153 MethodInvocation.invoke(superCtor),
156 putField(instrumentedType, INSTANT_FIELD),
161 private enum EventInstantImplementation implements Implementation {
165 public InstrumentedType prepare(final InstrumentedType instrumentedType) {
166 return instrumentedType;
170 public ByteCodeAppender appender(final Target implementationTarget) {
171 return new ByteCodeAppender.Simple(
173 getField(implementationTarget.getInstrumentedType(), INSTANT_FIELD),
174 MethodReturn.REFERENCE);