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 com.google.common.base.Verify.verify;
12 import static java.util.Objects.requireNonNull;
14 import com.google.common.base.Throwables;
15 import java.lang.invoke.MethodHandle;
16 import java.lang.invoke.MethodHandles;
17 import java.lang.invoke.MethodType;
18 import javax.xml.transform.dom.DOMSource;
19 import net.bytebuddy.ByteBuddy;
20 import net.bytebuddy.dynamic.DynamicType.Builder;
21 import net.bytebuddy.jar.asm.Opcodes;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.mdsal.binding.dom.codec.api.BindingOpaqueObjectCodecTreeNode;
24 import org.opendaylight.mdsal.binding.loader.BindingClassLoader;
25 import org.opendaylight.mdsal.binding.loader.BindingClassLoader.GeneratorResult;
26 import org.opendaylight.yangtools.yang.binding.OpaqueData;
27 import org.opendaylight.yangtools.yang.binding.OpaqueObject;
28 import org.opendaylight.yangtools.yang.data.api.schema.AnydataNode;
29 import org.opendaylight.yangtools.yang.data.api.schema.DOMSourceAnyxmlNode;
30 import org.opendaylight.yangtools.yang.data.api.schema.ForeignDataNode;
31 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
32 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
33 import org.opendaylight.yangtools.yang.model.api.AnydataSchemaNode;
34 import org.opendaylight.yangtools.yang.model.api.AnyxmlSchemaNode;
35 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
37 abstract class OpaqueNodeCodecContext<T extends OpaqueObject<T>> extends ValueNodeCodecContext
38 implements BindingOpaqueObjectCodecTreeNode<T> {
39 static final class Anyxml<T extends OpaqueObject<T>> extends OpaqueNodeCodecContext<T> {
40 Anyxml(final AnyxmlSchemaNode schema, final String getterName, final Class<T> bindingClass,
41 final BindingClassLoader loader) {
42 super(schema, getterName, bindingClass, loader);
46 ForeignDataNode<?> serializedData(final OpaqueData<?> opaqueData) {
47 final Class<?> model = opaqueData.getObjectModel();
48 verify(DOMSource.class.isAssignableFrom(model), "Cannot just yet support object model %s", model);
49 return Builders.anyXmlBuilder().withNodeIdentifier(getDomPathArgument())
50 .withValue((DOMSource) opaqueData.getData()).build();
54 T deserialize(final ForeignDataNode<?> foreignData) {
55 // Streaming cannot support anything but DOMSource-based AnyxmlNodes.
56 verify(foreignData instanceof DOMSourceAnyxmlNode, "Variable node %s not supported yet", foreignData);
57 return super.deserialize(foreignData);
61 static final class Anydata<T extends OpaqueObject<T>> extends OpaqueNodeCodecContext<T> {
62 Anydata(final AnydataSchemaNode schema, final String getterName, final Class<T> bindingClass,
63 final BindingClassLoader loader) {
64 super(schema, getterName, bindingClass, loader);
68 AnydataNode<?> serializedData(final OpaqueData<?> opaqueData) {
69 return buildAnydata(opaqueData);
72 private <M> @NonNull AnydataNode<M> buildAnydata(final OpaqueData<M> opaqueData) {
73 return Builders.anydataBuilder(opaqueData.getObjectModel()).withNodeIdentifier(getDomPathArgument())
74 .withValue(opaqueData.getData()).build();
78 private static final MethodType CTOR_LOOKUP_TYPE = MethodType.methodType(void.class, OpaqueData.class);
79 private static final MethodType CTOR_INVOKE_TYPE = MethodType.methodType(OpaqueObject.class, OpaqueData.class);
80 @SuppressWarnings("rawtypes")
81 private static final Builder<CodecOpaqueObject> TEMPLATE = new ByteBuddy().subclass(CodecOpaqueObject.class)
82 .modifiers(Opcodes.ACC_PUBLIC | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC);
84 private final AbstractValueCodec<Object, Object> valueCodec = new AbstractValueCodec<>() {
86 protected Object serializeImpl(final Object input) {
87 checkArgument(bindingClass.isInstance(input), "Unexpected input %s", input);
88 // FIXME: this works for DOMSource only, for generalization we need to pass down the object model, too
89 final OpaqueData<?> opaqueData = bindingClass.cast(input).getValue();
90 final Object data = opaqueData.getData();
91 checkArgument(data instanceof DOMSource, "Unexpected data %s", data);
96 protected Object deserializeImpl(final Object input) {
97 checkArgument(input instanceof NormalizedNode, "Unexpected input %s", input);
98 return OpaqueNodeCodecContext.this.deserializeObject((NormalizedNode) input);
102 private final MethodHandle proxyConstructor;
103 private final @NonNull Class<T> bindingClass;
105 OpaqueNodeCodecContext(final DataSchemaNode schema, final String getterName, final Class<T> bindingClass,
106 final BindingClassLoader loader) {
107 super(schema, getterName, null);
108 this.bindingClass = requireNonNull(bindingClass);
109 proxyConstructor = createImpl(loader, bindingClass);
113 public final Class<T> getBindingClass() {
118 public final T deserialize(final NormalizedNode data) {
119 if (data instanceof ForeignDataNode<?> foreign) {
120 return deserialize(foreign);
122 throw new IllegalArgumentException("Expected a ForeignDataNode, not " + data.contract().getSimpleName());
125 T deserialize(final ForeignDataNode<?> foreignData) {
126 return bindingClass.cast(createBindingProxy(new ForeignOpaqueData<>(foreignData)));
130 public final ForeignDataNode<?> serialize(final T data) {
131 final OpaqueData<?> opaqueData = data.getValue();
132 return opaqueData instanceof ForeignOpaqueData<?> foreign ? foreign.domData() : serializedData(opaqueData);
136 protected final @NonNull Object deserializeObject(final NormalizedNode normalizedNode) {
137 return deserialize(normalizedNode);
141 ValueCodec<Object, Object> getValueCodec() {
145 abstract @NonNull ForeignDataNode<?> serializedData(OpaqueData<?> opaqueData);
147 @SuppressWarnings("checkstyle:illegalCatch")
148 private OpaqueObject<?> createBindingProxy(final OpaqueData<?> data) {
150 return (OpaqueObject<?>) proxyConstructor.invokeExact(data);
151 } catch (final Throwable e) {
152 Throwables.throwIfUnchecked(e);
153 throw new IllegalStateException(e);
157 private static MethodHandle createImpl(final BindingClassLoader rootLoader, final Class<?> bindingClass) {
158 final Class<?> proxyClass = rootLoader.generateClass(bindingClass, "codecImpl",
159 (loader, fqcn, bindingInterface) -> GeneratorResult.of(TEMPLATE
161 .implement(bindingInterface)
165 return MethodHandles.publicLookup().findConstructor(proxyClass, CTOR_LOOKUP_TYPE).asType(CTOR_INVOKE_TYPE);
166 } catch (IllegalAccessException | NoSuchMethodException e) {
167 throw new LinkageError("Failed to access constructor for prototype " + proxyClass, e);