2 * Copyright (c) 2014 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.yangtools.binding.data.codec.impl;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.ImmutableMap;
12 import com.google.common.collect.Iterables;
13 import java.lang.reflect.Constructor;
14 import java.lang.reflect.InvocationTargetException;
15 import java.lang.reflect.Method;
16 import java.lang.reflect.ParameterizedType;
17 import java.lang.reflect.Type;
18 import java.util.AbstractMap.SimpleEntry;
19 import java.util.ArrayList;
20 import java.util.Collection;
21 import java.util.HashMap;
22 import java.util.LinkedHashMap;
23 import java.util.LinkedList;
24 import java.util.List;
26 import java.util.Map.Entry;
27 import java.util.concurrent.Callable;
28 import javax.annotation.Nonnull;
29 import javax.annotation.Nullable;
30 import org.opendaylight.yangtools.binding.data.codec.impl.NodeCodecContext.CodecContextFactory;
31 import org.opendaylight.yangtools.concepts.Codec;
32 import org.opendaylight.yangtools.concepts.Immutable;
33 import org.opendaylight.yangtools.sal.binding.generator.util.BindingRuntimeContext;
34 import org.opendaylight.yangtools.sal.binding.model.api.GeneratedType;
35 import org.opendaylight.yangtools.util.ClassLoaderUtils;
36 import org.opendaylight.yangtools.yang.binding.BaseIdentity;
37 import org.opendaylight.yangtools.yang.binding.BindingMapping;
38 import org.opendaylight.yangtools.yang.binding.BindingStreamEventWriter;
39 import org.opendaylight.yangtools.yang.binding.DataContainer;
40 import org.opendaylight.yangtools.yang.binding.Identifiable;
41 import org.opendaylight.yangtools.yang.binding.Identifier;
42 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
43 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.IdentifiableItem;
44 import org.opendaylight.yangtools.yang.binding.Notification;
45 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
46 import org.opendaylight.yangtools.yang.common.QName;
47 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
48 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
49 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
50 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
51 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
52 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
53 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
54 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
55 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
56 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
57 import org.opendaylight.yangtools.yang.model.api.type.BooleanTypeDefinition;
58 import org.opendaylight.yangtools.yang.model.api.type.EmptyTypeDefinition;
59 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
60 import org.opendaylight.yangtools.yang.model.api.type.InstanceIdentifierTypeDefinition;
61 import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
62 import org.opendaylight.yangtools.yang.model.api.type.UnionTypeDefinition;
63 import org.slf4j.Logger;
64 import org.slf4j.LoggerFactory;
66 final class BindingCodecContext implements CodecContextFactory, Immutable {
67 private static final Logger LOG = LoggerFactory.getLogger(BindingCodecContext.class);
68 private static final String GETTER_PREFIX = "get";
70 private final Codec<YangInstanceIdentifier, InstanceIdentifier<?>> instanceIdentifierCodec =
71 new InstanceIdentifierCodec();
72 private final Codec<QName, Class<?>> identityCodec;
73 private final BindingRuntimeContext context;
74 private final SchemaRootCodecContext root;
76 public BindingCodecContext(final BindingRuntimeContext context) {
77 this.context = Preconditions.checkNotNull(context, "Binding Runtime Context is required.");
78 this.root = SchemaRootCodecContext.create(this);
79 this.identityCodec = new IdentityCodec(context);
83 public BindingRuntimeContext getRuntimeContext() {
87 Codec<YangInstanceIdentifier, InstanceIdentifier<?>> getInstanceIdentifierCodec() {
88 return instanceIdentifierCodec;
91 public Codec<QName, Class<?>> getIdentityCodec() {
95 public Entry<YangInstanceIdentifier, BindingStreamEventWriter> newWriter(final InstanceIdentifier<?> path,
96 final NormalizedNodeStreamWriter domWriter) {
97 final LinkedList<YangInstanceIdentifier.PathArgument> yangArgs = new LinkedList<>();
98 final DataContainerCodecContext<?> codecContext = getCodecContextNode(path, yangArgs);
99 final BindingStreamEventWriter writer = new BindingToNormalizedStreamWriter(codecContext, domWriter);
100 return new SimpleEntry<>(YangInstanceIdentifier.create(yangArgs), writer);
103 public BindingStreamEventWriter newWriterWithoutIdentifier(final InstanceIdentifier<?> path,
104 final NormalizedNodeStreamWriter domWriter) {
105 return new BindingToNormalizedStreamWriter(getCodecContextNode(path, null), domWriter);
108 BindingStreamEventWriter newRpcWriter(final Class<? extends DataContainer> rpcInputOrOutput,
109 final NormalizedNodeStreamWriter domWriter) {
110 final NodeCodecContext schema = root.getRpc(rpcInputOrOutput);
111 return new BindingToNormalizedStreamWriter(schema, domWriter);
114 BindingStreamEventWriter newNotificationWriter(final Class<? extends Notification> notification,
115 final NormalizedNodeStreamWriter domWriter) {
116 final NodeCodecContext schema = root.getNotification(notification);
117 return new BindingToNormalizedStreamWriter(schema, domWriter);
120 public DataContainerCodecContext<?> getCodecContextNode(final InstanceIdentifier<?> binding,
121 final List<YangInstanceIdentifier.PathArgument> builder) {
122 DataContainerCodecContext<?> currentNode = root;
123 for (final InstanceIdentifier.PathArgument bindingArg : binding.getPathArguments()) {
124 currentNode = currentNode.getIdentifierChild(bindingArg, builder);
130 * Multi-purpose utility function. Traverse the codec tree, looking for
131 * the appropriate codec for the specified {@link YangInstanceIdentifier}.
132 * As a side-effect, gather all traversed binding {@link InstanceIdentifier.PathArgument}s
133 * into the supplied collection.
135 * @param dom {@link YangInstanceIdentifier} which is to be translated
136 * @param bindingArguments Collection for traversed path arguments
137 * @return Codec for target node, or @null if the node does not have a
138 * binding representation (choice, case, leaf).
140 @Nullable NodeCodecContext getCodecContextNode(final @Nonnull YangInstanceIdentifier dom,
141 final @Nonnull Collection<InstanceIdentifier.PathArgument> bindingArguments) {
142 NodeCodecContext currentNode = root;
143 ListNodeCodecContext currentList = null;
145 for (final YangInstanceIdentifier.PathArgument domArg : dom.getPathArguments()) {
146 Preconditions.checkArgument(currentNode instanceof DataContainerCodecContext<?>, "Unexpected child of non-container node %s", currentNode);
147 final DataContainerCodecContext<?> previous = (DataContainerCodecContext<?>) currentNode;
148 final NodeCodecContext nextNode = previous.getYangIdentifierChild(domArg);
151 * List representation in YANG Instance Identifier consists of two
152 * arguments: first is list as a whole, second is list as an item so
153 * if it is /list it means list as whole, if it is /list/list - it
154 * is wildcarded and if it is /list/list[key] it is concrete item,
155 * all this variations are expressed in Binding Aware Instance
156 * Identifier as Item or IdentifiableItem
158 if (currentList != null) {
159 Preconditions.checkArgument(currentList == nextNode, "List should be referenced two times in YANG Instance Identifier %s", dom);
161 // We entered list, so now we have all information to emit
162 // list path using second list argument.
163 bindingArguments.add(currentList.getBindingPathArgument(domArg));
165 currentNode = nextNode;
166 } else if (nextNode instanceof ListNodeCodecContext) {
167 // We enter list, we do not update current Node yet,
168 // since we need to verify
169 currentList = (ListNodeCodecContext) nextNode;
170 } else if (nextNode instanceof ChoiceNodeCodecContext) {
171 // We do not add path argument for choice, since
172 // it is not supported by binding instance identifier.
173 currentNode = nextNode;
174 } else if (nextNode instanceof DataContainerCodecContext<?>) {
175 bindingArguments.add(((DataContainerCodecContext<?>) nextNode).getBindingPathArgument(domArg));
176 currentNode = nextNode;
177 } else if (nextNode instanceof LeafNodeCodecContext) {
178 LOG.debug("Instance identifier referencing a leaf is not representable (%s)", dom);
183 // Algorithm ended in list as whole representation
184 // we sill need to emit identifier for list
185 if (currentNode instanceof ChoiceNodeCodecContext) {
186 LOG.debug("Instance identifier targeting a choice is not representable (%s)", dom);
189 if (currentNode instanceof CaseNodeCodecContext) {
190 LOG.debug("Instance identifier targeting a case is not representable (%s)", dom);
194 if (currentList != null) {
195 bindingArguments.add(currentList.getBindingPathArgument(null));
201 NotificationCodecContext getNotificationContext(final SchemaPath notification) {
202 return root.getNotification(notification);
205 ContainerNodeCodecContext getRpcDataContext(final SchemaPath path) {
206 return root.getRpc(path);
210 public ImmutableMap<String, LeafNodeCodecContext> getLeafNodes(final Class<?> parentClass,
211 final DataNodeContainer childSchema) {
212 final HashMap<String, DataSchemaNode> getterToLeafSchema = new HashMap<>();
213 for (final DataSchemaNode leaf : childSchema.getChildNodes()) {
214 final TypeDefinition<?> typeDef;
215 if (leaf instanceof LeafSchemaNode) {
216 typeDef = ((LeafSchemaNode) leaf).getType();
217 } else if (leaf instanceof LeafListSchemaNode) {
218 typeDef = ((LeafListSchemaNode) leaf).getType();
223 final String getterName = getGetterName(leaf.getQName(), typeDef);
224 getterToLeafSchema.put(getterName, leaf);
226 return getLeafNodesUsingReflection(parentClass, getterToLeafSchema);
229 private String getGetterName(final QName qName, TypeDefinition<?> typeDef) {
230 final String suffix = BindingMapping.getClassName(qName);
232 while (typeDef.getBaseType() != null) {
233 typeDef = typeDef.getBaseType();
235 if (typeDef instanceof BooleanTypeDefinition || typeDef instanceof EmptyTypeDefinition) {
236 return "is" + suffix;
238 return GETTER_PREFIX + suffix;
241 private ImmutableMap<String, LeafNodeCodecContext> getLeafNodesUsingReflection(final Class<?> parentClass,
242 final Map<String, DataSchemaNode> getterToLeafSchema) {
243 final Map<String, LeafNodeCodecContext> leaves = new HashMap<>();
244 for (final Method method : parentClass.getMethods()) {
245 if (method.getParameterTypes().length == 0) {
246 final DataSchemaNode schema = getterToLeafSchema.get(method.getName());
247 final Class<?> valueType;
248 if (schema instanceof LeafSchemaNode) {
249 valueType = method.getReturnType();
250 } else if (schema instanceof LeafListSchemaNode) {
251 final Type genericType = ClassLoaderUtils.getFirstGenericParameter(method.getGenericReturnType());
253 if (genericType instanceof Class<?>) {
254 valueType = (Class<?>) genericType;
255 } else if (genericType instanceof ParameterizedType) {
256 valueType = (Class<?>) ((ParameterizedType) genericType).getRawType();
258 throw new IllegalStateException("Unexpected return type " + genericType);
261 continue; // We do not have schema for leaf, so we will ignore it (eg. getClass, getImplementedInterface).
263 final Codec<Object, Object> codec = getCodec(valueType, schema);
264 final LeafNodeCodecContext leafNode = new LeafNodeCodecContext(schema, codec, method);
265 leaves.put(schema.getQName().getLocalName(), leafNode);
268 return ImmutableMap.copyOf(leaves);
273 private Codec<Object, Object> getCodec(final Class<?> valueType, final DataSchemaNode schema) {
274 final TypeDefinition<?> instantiatedType;
275 if (schema instanceof LeafSchemaNode) {
276 instantiatedType = ((LeafSchemaNode) schema).getType();
277 } else if (schema instanceof LeafListSchemaNode) {
278 instantiatedType = ((LeafListSchemaNode) schema).getType();
280 throw new IllegalArgumentException("Unsupported leaf node type " + schema.getClass());
282 if (Class.class.equals(valueType)) {
283 @SuppressWarnings({ "unchecked", "rawtypes" })
284 final Codec<Object, Object> casted = (Codec) identityCodec;
286 } else if (InstanceIdentifier.class.equals(valueType)) {
287 @SuppressWarnings({ "unchecked", "rawtypes" })
288 final Codec<Object, Object> casted = (Codec) instanceIdentifierCodec;
290 } else if (Boolean.class.equals(valueType)) {
291 if(instantiatedType instanceof EmptyTypeDefinition) {
292 return ValueTypeCodec.EMPTY_CODEC;
294 } else if (BindingReflections.isBindingClass(valueType)) {
295 return getCodec(valueType, instantiatedType);
297 return ValueTypeCodec.NOOP_CODEC;
300 private Codec<Object, Object> getCodec(final Class<?> valueType, final TypeDefinition<?> instantiatedType) {
301 @SuppressWarnings("rawtypes")
302 TypeDefinition rootType = instantiatedType;
303 while (rootType.getBaseType() != null) {
304 rootType = rootType.getBaseType();
306 if (rootType instanceof IdentityrefTypeDefinition) {
307 return ValueTypeCodec.encapsulatedValueCodecFor(valueType, identityCodec);
308 } else if (rootType instanceof InstanceIdentifierTypeDefinition) {
309 return ValueTypeCodec.encapsulatedValueCodecFor(valueType, instanceIdentifierCodec);
310 } else if (rootType instanceof UnionTypeDefinition) {
311 final Callable<UnionTypeCodec> loader = UnionTypeCodec.loader(valueType, (UnionTypeDefinition) rootType);
313 return loader.call();
314 } catch (final Exception e) {
315 throw new IllegalStateException("Unable to load codec for " + valueType, e);
317 } else if(rootType instanceof LeafrefTypeDefinition) {
318 final Entry<GeneratedType, Object> typeWithSchema = context.getTypeWithSchema(valueType);
319 final Object schema = typeWithSchema.getValue();
320 Preconditions.checkState(schema instanceof TypeDefinition<?>);
321 return getCodec(valueType, (TypeDefinition<?>) schema);
323 return ValueTypeCodec.getCodecFor(valueType, instantiatedType);
326 private class InstanceIdentifierCodec implements Codec<YangInstanceIdentifier, InstanceIdentifier<?>> {
329 public YangInstanceIdentifier serialize(final InstanceIdentifier<?> input) {
330 final List<YangInstanceIdentifier.PathArgument> domArgs = new ArrayList<>();
331 getCodecContextNode(input, domArgs);
332 return YangInstanceIdentifier.create(domArgs);
336 public InstanceIdentifier<?> deserialize(final YangInstanceIdentifier input) {
337 final List<InstanceIdentifier.PathArgument> builder = new ArrayList<>();
338 final NodeCodecContext codec = getCodecContextNode(input, builder);
342 if (codec instanceof ListNodeCodecContext && Iterables.getLast(builder) instanceof InstanceIdentifier.Item) {
343 // We ended up in list, but without key, which means it represent list as a whole,
344 // which is not binding representable.
347 return InstanceIdentifier.create(builder);
351 private static class IdentityCodec implements Codec<QName, Class<?>> {
352 private final BindingRuntimeContext context;
354 IdentityCodec(final BindingRuntimeContext context) {
355 this.context = Preconditions.checkNotNull(context);
359 public Class<?> deserialize(final QName input) {
360 Preconditions.checkArgument(input != null, "Input must not be null.");
361 return context.getIdentityClass(input);
365 public QName serialize(final Class<?> input) {
366 Preconditions.checkArgument(BaseIdentity.class.isAssignableFrom(input));
367 return BindingReflections.findQName(input);
371 private static class ValueContext {
374 Codec<Object, Object> codec;
376 public ValueContext(final Class<?> identifier, final LeafNodeCodecContext leaf) {
377 final String getterName = GETTER_PREFIX
378 + BindingMapping.getClassName(leaf.getDomPathArgument().getNodeType());
380 getter = identifier.getMethod(getterName);
381 } catch (NoSuchMethodException | SecurityException e) {
382 throw new IllegalStateException(e);
384 codec = leaf.getValueCodec();
387 public Object getAndSerialize(final Object obj) {
389 final Object value = getter.invoke(obj);
390 Preconditions.checkArgument(value != null,
391 "All keys must be specified for %s. Missing key is %s. Supplied key is %s",
392 getter.getDeclaringClass(), getter.getName(), obj);
393 return codec.serialize(value);
394 } catch (IllegalAccessException | InvocationTargetException e) {
395 throw new IllegalArgumentException(e);
399 public Object deserialize(final Object obj) {
400 return codec.deserialize(obj);
405 private static class IdentifiableItemCodec implements Codec<NodeIdentifierWithPredicates, IdentifiableItem<?, ?>> {
407 private final Map<QName, ValueContext> keyValueContexts;
408 private final ListSchemaNode schema;
409 private final Constructor<? extends Identifier<?>> constructor;
410 private final Class<?> identifiable;
412 public IdentifiableItemCodec(final ListSchemaNode schema, final Class<? extends Identifier<?>> keyClass,
413 final Class<?> identifiable, final Map<QName, ValueContext> keyValueContexts) {
414 this.schema = schema;
415 this.identifiable = identifiable;
416 this.constructor = getConstructor(keyClass);
419 * We need to re-index to make sure we instantiate nodes in the order in which
422 final Map<QName, ValueContext> keys = new LinkedHashMap<>();
423 for (final QName qname : schema.getKeyDefinition()) {
424 keys.put(qname, keyValueContexts.get(qname));
426 this.keyValueContexts = ImmutableMap.copyOf(keys);
430 public IdentifiableItem<?, ?> deserialize(final NodeIdentifierWithPredicates input) {
431 final Collection<QName> keys = schema.getKeyDefinition();
432 final ArrayList<Object> bindingValues = new ArrayList<>(keys.size());
433 for (final QName key : keys) {
434 final Object yangValue = input.getKeyValues().get(key);
435 bindingValues.add(keyValueContexts.get(key).deserialize(yangValue));
438 final Identifier<?> identifier;
440 identifier = constructor.newInstance(bindingValues.toArray());
441 } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
442 throw new IllegalStateException(String.format("Failed to instantiate key class %s", constructor.getDeclaringClass()), e);
445 @SuppressWarnings({ "rawtypes", "unchecked" })
446 final IdentifiableItem identifiableItem = new IdentifiableItem(identifiable, identifier);
447 return identifiableItem;
451 public NodeIdentifierWithPredicates serialize(final IdentifiableItem<?, ?> input) {
452 final Object value = input.getKey();
454 final Map<QName, Object> values = new LinkedHashMap<>();
455 for (final Entry<QName, ValueContext> valueCtx : keyValueContexts.entrySet()) {
456 values.put(valueCtx.getKey(), valueCtx.getValue().getAndSerialize(value));
458 return new NodeIdentifierWithPredicates(schema.getQName(), values);
462 @SuppressWarnings("unchecked")
463 private static Constructor<? extends Identifier<?>> getConstructor(final Class<? extends Identifier<?>> clazz) {
464 for (@SuppressWarnings("rawtypes") final Constructor constr : clazz.getConstructors()) {
465 final Class<?>[] parameters = constr.getParameterTypes();
466 if (!clazz.equals(parameters[0])) {
467 // It is not copy constructor;
471 throw new IllegalArgumentException("Supplied class " + clazz + "does not have required constructor.");
475 public Codec<NodeIdentifierWithPredicates, IdentifiableItem<?, ?>> getPathArgumentCodec(final Class<?> listClz,
476 final ListSchemaNode schema) {
477 final Class<? extends Identifier<?>> identifier = ClassLoaderUtils.findFirstGenericArgument(listClz,
479 final Map<QName, ValueContext> valueCtx = new HashMap<>();
480 for (final LeafNodeCodecContext leaf : getLeafNodes(identifier, schema).values()) {
481 final QName name = leaf.getDomPathArgument().getNodeType();
482 valueCtx.put(name, new ValueContext(identifier, leaf));
484 return new IdentifiableItemCodec(schema, identifier, listClz, valueCtx);