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 java.lang.reflect.InvocationHandler;
19 import java.lang.reflect.Method;
20 import java.lang.reflect.Proxy;
21 import javax.xml.transform.dom.DOMSource;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.mdsal.binding.dom.codec.api.BindingOpaqueObjectCodecTreeNode;
24 import org.opendaylight.yangtools.concepts.Codec;
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.AnyXmlNode;
28 import org.opendaylight.yangtools.yang.data.api.schema.ForeignDataNode;
29 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
30 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
31 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
32 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
34 abstract class OpaqueNodeCodecContext<T extends OpaqueObject<T>> extends ValueNodeCodecContext
35 implements BindingOpaqueObjectCodecTreeNode<T> {
36 static final class AnyXml<T extends OpaqueObject<T>> extends OpaqueNodeCodecContext<T> {
37 AnyXml(final AnyXmlSchemaNode schema, final Method getter, final Class<T> bindingClass) {
38 super(schema, getter, bindingClass);
42 ForeignDataNode<?, ?> serializedData(final OpaqueData<?> opaqueData) {
43 final Class<?> model = opaqueData.getObjectModel();
44 verify(DOMSource.class.isAssignableFrom(model), "Cannot just yet support object model %s", model);
45 return Builders.anyXmlBuilder().withNodeIdentifier(getDomPathArgument())
46 .withValue((DOMSource) opaqueData.getData()).build();
50 private static final MethodType CONSTRUCTOR_TYPE = MethodType.methodType(void.class, InvocationHandler.class);
51 private static final MethodType OPAQUEOBJECT_TYPE = MethodType.methodType(OpaqueObject.class,
52 ForeignOpaqueObject.class);
54 private final Codec<Object, Object> valueCodec = new Codec<Object, Object>() {
56 public Object serialize(final Object input) {
57 checkArgument(bindingClass.isInstance(input), "Unexpected input %s", input);
58 // FIXME: this works for DOMSource only, for generalization we need to pass down the object model, too
59 final OpaqueData<?> opaqueData = bindingClass.cast(input).getValue();
60 final Object data = opaqueData.getData();
61 checkArgument(data instanceof DOMSource, "Unexpected data %s", data);
66 public Object deserialize(final Object input) {
67 checkArgument(input instanceof NormalizedNode, "Unexpected input %s", input);
68 return OpaqueNodeCodecContext.this.deserializeObject((NormalizedNode<?, ?>) input);
72 private final MethodHandle proxyConstructor;
73 private final @NonNull Class<T> bindingClass;
75 OpaqueNodeCodecContext(final DataSchemaNode schema, final Method getter, final Class<T> bindingClass) {
76 super(schema, getter, null);
77 this.bindingClass = requireNonNull(bindingClass);
79 final Class<?> proxyClass = Proxy.getProxyClass(bindingClass.getClassLoader(), bindingClass);
81 proxyConstructor = MethodHandles.publicLookup().findConstructor(proxyClass, CONSTRUCTOR_TYPE)
82 .asType(OPAQUEOBJECT_TYPE);
83 } catch (NoSuchMethodException | IllegalAccessException e) {
84 throw new IllegalStateException("Failed to find contructor for class " + proxyClass, e);
89 public final Class<T> getBindingClass() {
94 public final T deserialize(final NormalizedNode<?, ?> data) {
95 checkArgument(data instanceof ForeignDataNode, "Unexpected value %s", data);
96 final ForeignDataNode<?, ?> foreignData = (ForeignDataNode<?, ?>) data;
97 // Streaming cannot support anything but DOMSource-based AnyxmlNodes.
98 verify(foreignData instanceof AnyXmlNode, "Variable node %s not supported yet", foreignData);
100 final ForeignOpaqueData<?> opaqueData = new ForeignOpaqueData<>(foreignData);
101 return bindingClass.cast(createBindingProxy(new ForeignOpaqueObject<>(bindingClass, opaqueData)));
105 public final ForeignDataNode<?, ?> serialize(final T data) {
106 final OpaqueData<?> opaqueData = data.getValue();
107 return opaqueData instanceof ForeignOpaqueData ? ((ForeignOpaqueData<?>) opaqueData).domData()
108 : serializedData(opaqueData);
112 protected final @NonNull Object deserializeObject(final NormalizedNode<?, ?> normalizedNode) {
113 return deserialize(normalizedNode);
117 Codec<Object, Object> getValueCodec() {
121 abstract @NonNull ForeignDataNode<?, ?> serializedData(OpaqueData<?> opaqueData);
123 @SuppressWarnings("checkstyle:illegalCatch")
124 private OpaqueObject<?> createBindingProxy(final ForeignOpaqueObject<?> handler) {
126 return (OpaqueObject<?>) proxyConstructor.invokeExact(handler);
127 } catch (final Throwable e) {
128 Throwables.throwIfUnchecked(e);
129 throw new IllegalStateException(e);