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 com.google.common.collect.ImmutableList;
16 import java.io.IOException;
17 import java.lang.invoke.MethodHandle;
18 import java.lang.invoke.MethodHandles;
19 import java.lang.invoke.MethodType;
20 import java.lang.reflect.Constructor;
21 import java.lang.reflect.Method;
22 import javassist.CannotCompileException;
23 import javassist.CtClass;
24 import javassist.Modifier;
25 import javassist.NotFoundException;
26 import javax.xml.transform.dom.DOMSource;
27 import org.eclipse.jdt.annotation.NonNull;
28 import org.opendaylight.mdsal.binding.dom.codec.api.BindingOpaqueObjectCodecTreeNode;
29 import org.opendaylight.mdsal.binding.dom.codec.loader.CodecClassLoader;
30 import org.opendaylight.mdsal.binding.dom.codec.loader.StaticClassPool;
31 import org.opendaylight.yangtools.concepts.Codec;
32 import org.opendaylight.yangtools.yang.binding.OpaqueData;
33 import org.opendaylight.yangtools.yang.binding.OpaqueObject;
34 import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.ForeignDataNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
37 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
38 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
39 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
41 abstract class OpaqueNodeCodecContext<T extends OpaqueObject<T>> extends ValueNodeCodecContext
42 implements BindingOpaqueObjectCodecTreeNode<T> {
43 static final class AnyXml<T extends OpaqueObject<T>> extends OpaqueNodeCodecContext<T> {
44 AnyXml(final AnyXmlSchemaNode schema, final Method getter, final Class<T> bindingClass,
45 final CodecClassLoader loader) {
46 super(schema, getter, bindingClass, loader);
50 ForeignDataNode<?, ?> serializedData(final OpaqueData<?> opaqueData) {
51 final Class<?> model = opaqueData.getObjectModel();
52 verify(DOMSource.class.isAssignableFrom(model), "Cannot just yet support object model %s", model);
53 return Builders.anyXmlBuilder().withNodeIdentifier(getDomPathArgument())
54 .withValue((DOMSource) opaqueData.getData()).build();
58 private static final CtClass SUPERCLASS = StaticClassPool.findClass(CodecOpaqueObject.class);
59 private static final MethodType CONSTRUCTOR_TYPE = MethodType.methodType(OpaqueObject.class,
62 private final Codec<Object, Object> valueCodec = new Codec<Object, Object>() {
64 public Object serialize(final Object input) {
65 checkArgument(bindingClass.isInstance(input), "Unexpected input %s", input);
66 // FIXME: this works for DOMSource only, for generalization we need to pass down the object model, too
67 final OpaqueData<?> opaqueData = bindingClass.cast(input).getValue();
68 final Object data = opaqueData.getData();
69 checkArgument(data instanceof DOMSource, "Unexpected data %s", data);
74 public Object deserialize(final Object input) {
75 checkArgument(input instanceof NormalizedNode, "Unexpected input %s", input);
76 return OpaqueNodeCodecContext.this.deserializeObject((NormalizedNode<?, ?>) input);
80 private final MethodHandle proxyConstructor;
81 private final @NonNull Class<T> bindingClass;
83 OpaqueNodeCodecContext(final DataSchemaNode schema, final Method getter, final Class<T> bindingClass,
84 final CodecClassLoader loader) {
85 super(schema, getter, null);
86 this.bindingClass = requireNonNull(bindingClass);
87 proxyConstructor = createImpl(loader, bindingClass);
91 public final Class<T> getBindingClass() {
96 public final T deserialize(final NormalizedNode<?, ?> data) {
97 checkArgument(data instanceof ForeignDataNode, "Unexpected value %s", data);
98 final ForeignDataNode<?, ?> foreignData = (ForeignDataNode<?, ?>) data;
99 // Streaming cannot support anything but DOMSource-based AnyxmlNodes.
100 verify(foreignData instanceof AnyXmlNode, "Variable node %s not supported yet", foreignData);
102 return bindingClass.cast(createBindingProxy(new ForeignOpaqueData<>(foreignData)));
106 public final ForeignDataNode<?, ?> serialize(final T data) {
107 final OpaqueData<?> opaqueData = data.getValue();
108 return opaqueData instanceof ForeignOpaqueData ? ((ForeignOpaqueData<?>) opaqueData).domData()
109 : serializedData(opaqueData);
113 protected final @NonNull Object deserializeObject(final NormalizedNode<?, ?> normalizedNode) {
114 return deserialize(normalizedNode);
118 Codec<Object, Object> getValueCodec() {
122 abstract @NonNull ForeignDataNode<?, ?> serializedData(OpaqueData<?> opaqueData);
124 @SuppressWarnings("checkstyle:illegalCatch")
125 private OpaqueObject<?> createBindingProxy(final OpaqueData<?> data) {
127 return (OpaqueObject<?>) proxyConstructor.invokeExact(data);
128 } catch (final Throwable e) {
129 Throwables.throwIfUnchecked(e);
130 throw new IllegalStateException(e);
134 private static MethodHandle createImpl(final CodecClassLoader rootLoader, final Class<?> bindingClass) {
135 final Class<?> proxyClass;
137 proxyClass = rootLoader.generateSubclass(SUPERCLASS, bindingClass, "codecImpl",
138 (pool, binding, generated) -> {
139 generated.addInterface(binding);
140 generated.setModifiers(Modifier.PUBLIC | Modifier.FINAL);
141 return ImmutableList.of();
143 } catch (CannotCompileException | IOException | NotFoundException e) {
144 throw new LinkageError("Failed to instantiate prototype for " + bindingClass, e);
149 ctor = proxyClass.getDeclaredConstructor(OpaqueData.class);
150 } catch (NoSuchMethodException e) {
151 throw new LinkageError("Failed to acquire constructor for prototype " + proxyClass, e);
154 return MethodHandles.publicLookup().unreflectConstructor(ctor).asType(CONSTRUCTOR_TYPE);
155 } catch (IllegalAccessException e) {
156 throw new LinkageError("Failed to access constructor for prototype " + proxyClass, e);