2 * Copyright (c) 2019 PANTHEON.tech, s.r.o. 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.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.Throwables;
14 import java.lang.invoke.MethodHandle;
15 import java.lang.invoke.MethodHandles;
16 import java.lang.invoke.MethodType;
17 import javax.xml.transform.dom.DOMSource;
18 import net.bytebuddy.ByteBuddy;
19 import net.bytebuddy.dynamic.DynamicType.Builder;
20 import net.bytebuddy.jar.asm.Opcodes;
21 import org.eclipse.jdt.annotation.NonNull;
22 import org.opendaylight.mdsal.binding.dom.codec.api.BindingOpaqueObjectCodecTreeNode;
23 import org.opendaylight.mdsal.binding.loader.BindingClassLoader;
24 import org.opendaylight.mdsal.binding.loader.BindingClassLoader.GeneratorResult;
25 import org.opendaylight.yangtools.yang.binding.OpaqueData;
26 import org.opendaylight.yangtools.yang.binding.OpaqueObject;
27 import org.opendaylight.yangtools.yang.data.api.schema.ForeignDataNode;
28 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
29 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
31 abstract sealed class AbstractOpaqueCodecContext<T extends OpaqueObject<T>> extends ValueNodeCodecContext
32 implements BindingOpaqueObjectCodecTreeNode<T> permits AnydataCodecContext, AnyxmlCodecContext {
33 private static final MethodType CTOR_LOOKUP_TYPE = MethodType.methodType(void.class, OpaqueData.class);
34 private static final MethodType CTOR_INVOKE_TYPE = MethodType.methodType(OpaqueObject.class, OpaqueData.class);
35 @SuppressWarnings("rawtypes")
36 private static final Builder<CodecOpaqueObject> TEMPLATE = new ByteBuddy().subclass(CodecOpaqueObject.class)
37 .modifiers(Opcodes.ACC_PUBLIC | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC);
39 private final AbstractValueCodec<Object, Object> valueCodec = new AbstractValueCodec<>() {
41 protected Object serializeImpl(final Object input) {
42 checkArgument(bindingClass.isInstance(input), "Unexpected input %s", input);
43 // FIXME: this works for DOMSource only, for generalization we need to pass down the object model, too
44 final OpaqueData<?> opaqueData = bindingClass.cast(input).getValue();
45 final Object data = opaqueData.getData();
46 checkArgument(data instanceof DOMSource, "Unexpected data %s", data);
51 protected Object deserializeImpl(final Object input) {
52 checkArgument(input instanceof NormalizedNode, "Unexpected input %s", input);
53 return deserializeObject((NormalizedNode) input);
57 private final MethodHandle proxyConstructor;
58 private final @NonNull Class<T> bindingClass;
60 AbstractOpaqueCodecContext(final DataSchemaNode schema, final String getterName, final Class<T> bindingClass,
61 final BindingClassLoader loader) {
62 super(schema, getterName, null);
63 this.bindingClass = requireNonNull(bindingClass);
64 proxyConstructor = createImpl(loader, bindingClass);
68 public final Class<T> getBindingClass() {
73 public final T deserialize(final NormalizedNode data) {
74 if (data instanceof ForeignDataNode<?> foreign) {
75 return deserialize(foreign);
77 throw new IllegalArgumentException("Expected a ForeignDataNode, not " + data.contract().getSimpleName());
80 T deserialize(final ForeignDataNode<?> foreignData) {
81 return bindingClass.cast(createBindingProxy(new ForeignOpaqueData<>(foreignData)));
85 public final ForeignDataNode<?> serialize(final T data) {
86 final OpaqueData<?> opaqueData = data.getValue();
87 return opaqueData instanceof ForeignOpaqueData<?> foreign ? foreign.domData() : serializedData(opaqueData);
91 protected final @NonNull Object deserializeObject(final NormalizedNode normalizedNode) {
92 return deserialize(normalizedNode);
96 ValueCodec<Object, Object> getValueCodec() {
100 abstract @NonNull ForeignDataNode<?> serializedData(OpaqueData<?> opaqueData);
102 @SuppressWarnings("checkstyle:illegalCatch")
103 private OpaqueObject<?> createBindingProxy(final OpaqueData<?> data) {
105 return (OpaqueObject<?>) proxyConstructor.invokeExact(data);
106 } catch (final Throwable e) {
107 Throwables.throwIfUnchecked(e);
108 throw new IllegalStateException(e);
112 private static MethodHandle createImpl(final BindingClassLoader rootLoader, final Class<?> bindingClass) {
113 final Class<?> proxyClass = CodecPackage.CODEC.generateClass(rootLoader, bindingClass,
114 (loader, fqcn, bindingInterface) -> GeneratorResult.of(TEMPLATE
116 .implement(bindingInterface)
120 return MethodHandles.publicLookup().findConstructor(proxyClass, CTOR_LOOKUP_TYPE).asType(CTOR_INVOKE_TYPE);
121 } catch (IllegalAccessException | NoSuchMethodException e) {
122 throw new LinkageError("Failed to access constructor for prototype " + proxyClass, e);