binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/mdsal/binding/dom/codec/impl/BindingCodecContext.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.mdsal.binding.dom.codec.impl;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11 import static com.google.common.base.Preconditions.checkState;
  12 import static java.util.Objects.requireNonNull;
  13
  14 import com.google.common.collect.ImmutableMap;
  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.Collection;
  20 import java.util.HashMap;
  21 import java.util.LinkedList;
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.Map.Entry;
  25 import java.util.concurrent.Callable;
  26 import org.eclipse.jdt.annotation.NonNull;
  27 import org.eclipse.jdt.annotation.Nullable;
  28 import org.opendaylight.mdsal.binding.dom.codec.api.BindingCodecTree;
  29 import org.opendaylight.mdsal.binding.dom.codec.api.BindingCodecTreeNode;
  30 import org.opendaylight.mdsal.binding.dom.codec.impl.NodeCodecContext.CodecContextFactory;
  31 import org.opendaylight.mdsal.binding.dom.codec.util.BindingSchemaMapping;
  32 import org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext;
  33 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
  34 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
  35 import org.opendaylight.yangtools.concepts.Codec;
  36 import org.opendaylight.yangtools.concepts.Immutable;
  37 import org.opendaylight.yangtools.util.ClassLoaderUtils;
  38 import org.opendaylight.yangtools.yang.binding.Action;
  39 import org.opendaylight.yangtools.yang.binding.BindingStreamEventWriter;
  40 import org.opendaylight.yangtools.yang.binding.DataContainer;
  41 import org.opendaylight.yangtools.yang.binding.DataObject;
  42 import org.opendaylight.yangtools.yang.binding.DataObjectSerializer;
  43 import org.opendaylight.yangtools.yang.binding.Identifiable;
  44 import org.opendaylight.yangtools.yang.binding.Identifier;
  45 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  46 import org.opendaylight.yangtools.yang.binding.Notification;
  47 import org.opendaylight.yangtools.yang.common.QName;
  48 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  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.DocumentedNode.WithStatus;
  53 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
  54 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
  55 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
  56 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  57 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  58 import org.opendaylight.yangtools.yang.model.api.TypedDataSchemaNode;
  59 import org.opendaylight.yangtools.yang.model.api.type.EmptyTypeDefinition;
  60 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
  61 import org.opendaylight.yangtools.yang.model.api.type.InstanceIdentifierTypeDefinition;
  62 import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
  63 import org.opendaylight.yangtools.yang.model.api.type.UnionTypeDefinition;
  64 import org.slf4j.Logger;
  65 import org.slf4j.LoggerFactory;
  66
  67 final class BindingCodecContext implements CodecContextFactory, BindingCodecTree, Immutable {
  68     private static final Logger LOG = LoggerFactory.getLogger(BindingCodecContext.class);
  69
  70     private final InstanceIdentifierCodec instanceIdentifierCodec;
  71     private final IdentityCodec identityCodec;
  72     private final BindingNormalizedNodeCodecRegistry registry;
  73     private final BindingRuntimeContext context;
  74     private final SchemaRootCodecContext<?> root;
  75
  76     BindingCodecContext(final BindingRuntimeContext context, final BindingNormalizedNodeCodecRegistry registry) {
  77         this.context = requireNonNull(context, "Binding Runtime Context is required.");
  78         this.root = SchemaRootCodecContext.create(this);
  79         this.identityCodec = new IdentityCodec(context);
  80         this.instanceIdentifierCodec = new InstanceIdentifierCodec(this);
  81         this.registry = requireNonNull(registry);
  82     }
  83
  84     @Override
  85     public BindingRuntimeContext getRuntimeContext() {
  86         return context;
  87     }
  88
  89     InstanceIdentifierCodec getInstanceIdentifierCodec() {
  90         return instanceIdentifierCodec;
  91     }
  92
  93     IdentityCodec getIdentityCodec() {
  94         return identityCodec;
  95     }
  96
  97     @SuppressWarnings({"rawtypes", "unchecked"})
  98     @Override
  99     public DataObjectSerializer getEventStreamSerializer(final Class<?> type) {
 100         return registry.getSerializer((Class) type);
 101     }
 102
 103     public Entry<YangInstanceIdentifier, BindingStreamEventWriter> newWriter(final InstanceIdentifier<?> path,
 104             final NormalizedNodeStreamWriter domWriter) {
 105         final List<YangInstanceIdentifier.PathArgument> yangArgs = new LinkedList<>();
 106         final DataContainerCodecContext<?,?> codecContext = getCodecContextNode(path, yangArgs);
 107         return new SimpleEntry<>(YangInstanceIdentifier.create(yangArgs), codecContext.createWriter(domWriter));
 108     }
 109
 110     public BindingStreamEventWriter newWriterWithoutIdentifier(final InstanceIdentifier<?> path,
 111             final NormalizedNodeStreamWriter domWriter) {
 112         return getCodecContextNode(path, null).createWriter(domWriter);
 113     }
 114
 115     BindingStreamEventWriter newRpcWriter(final Class<? extends DataContainer> rpcInputOrOutput,
 116             final NormalizedNodeStreamWriter domWriter) {
 117         return root.getRpc(rpcInputOrOutput).createWriter(domWriter);
 118     }
 119
 120     BindingStreamEventWriter newNotificationWriter(final Class<? extends Notification> notification,
 121             final NormalizedNodeStreamWriter domWriter) {
 122         return root.getNotification(notification).createWriter(domWriter);
 123     }
 124
 125     public DataContainerCodecContext<?,?> getCodecContextNode(final InstanceIdentifier<?> binding,
 126             final List<YangInstanceIdentifier.PathArgument> builder) {
 127         DataContainerCodecContext<?,?> currentNode = root;
 128         for (final InstanceIdentifier.PathArgument bindingArg : binding.getPathArguments()) {
 129             currentNode = currentNode.bindingPathArgumentChild(bindingArg, builder);
 130             checkArgument(currentNode != null, "Supplied Instance Identifier %s is not valid.", binding);
 131         }
 132         return currentNode;
 133     }
 134
 135     /**
 136      * Multi-purpose utility function. Traverse the codec tree, looking for
 137      * the appropriate codec for the specified {@link YangInstanceIdentifier}.
 138      * As a side-effect, gather all traversed binding {@link InstanceIdentifier.PathArgument}s
 139      * into the supplied collection.
 140      *
 141      * @param dom {@link YangInstanceIdentifier} which is to be translated
 142      * @param bindingArguments Collection for traversed path arguments
 143      * @return Codec for target node, or @null if the node does not have a
 144      *         binding representation (choice, case, leaf).
 145      *
 146      */
 147     @Nullable NodeCodecContext<?> getCodecContextNode(final @NonNull YangInstanceIdentifier dom,
 148             final @Nullable Collection<InstanceIdentifier.PathArgument> bindingArguments) {
 149         NodeCodecContext<?> currentNode = root;
 150         ListNodeCodecContext<?> currentList = null;
 151
 152         for (final YangInstanceIdentifier.PathArgument domArg : dom.getPathArguments()) {
 153             checkArgument(currentNode instanceof DataContainerCodecContext,
 154                 "Unexpected child of non-container node %s", currentNode);
 155             final DataContainerCodecContext<?,?> previous = (DataContainerCodecContext<?, ?>) currentNode;
 156             final NodeCodecContext<?> nextNode = previous.yangPathArgumentChild(domArg);
 157
 158             /*
 159              * List representation in YANG Instance Identifier consists of two
 160              * arguments: first is list as a whole, second is list as an item so
 161              * if it is /list it means list as whole, if it is /list/list - it
 162              * is wildcarded and if it is /list/list[key] it is concrete item,
 163              * all this variations are expressed in Binding Aware Instance
 164              * Identifier as Item or IdentifiableItem
 165              */
 166             if (currentList != null) {
 167                 checkArgument(currentList == nextNode,
 168                         "List should be referenced two times in YANG Instance Identifier %s", dom);
 169
 170                 // We entered list, so now we have all information to emit
 171                 // list path using second list argument.
 172                 if (bindingArguments != null) {
 173                     bindingArguments.add(currentList.getBindingPathArgument(domArg));
 174                 }
 175                 currentList = null;
 176                 currentNode = nextNode;
 177             } else if (nextNode instanceof ListNodeCodecContext) {
 178                 // We enter list, we do not update current Node yet,
 179                 // since we need to verify
 180                 currentList = (ListNodeCodecContext<?>) nextNode;
 181             } else if (nextNode instanceof ChoiceNodeCodecContext) {
 182                 // We do not add path argument for choice, since
 183                 // it is not supported by binding instance identifier.
 184                 currentNode = nextNode;
 185             } else if (nextNode instanceof DataContainerCodecContext) {
 186                 if (bindingArguments != null) {
 187                     bindingArguments.add(((DataContainerCodecContext<?, ?>) nextNode).getBindingPathArgument(domArg));
 188                 }
 189                 currentNode = nextNode;
 190             } else if (nextNode instanceof LeafNodeCodecContext) {
 191                 LOG.debug("Instance identifier referencing a leaf is not representable ({})", dom);
 192                 return null;
 193             }
 194         }
 195
 196         // Algorithm ended in list as whole representation
 197         // we sill need to emit identifier for list
 198         if (currentNode instanceof ChoiceNodeCodecContext) {
 199             LOG.debug("Instance identifier targeting a choice is not representable ({})", dom);
 200             return null;
 201         }
 202         if (currentNode instanceof CaseNodeCodecContext) {
 203             LOG.debug("Instance identifier targeting a case is not representable ({})", dom);
 204             return null;
 205         }
 206
 207         if (currentList != null) {
 208             if (bindingArguments != null) {
 209                 bindingArguments.add(currentList.getBindingPathArgument(null));
 210             }
 211             return currentList;
 212         }
 213         return currentNode;
 214     }
 215
 216     NotificationCodecContext<?> getNotificationContext(final SchemaPath notification) {
 217         return root.getNotification(notification);
 218     }
 219
 220     RpcInputCodec<?> getRpcInputCodec(final SchemaPath path) {
 221         return root.getRpc(path);
 222     }
 223
 224     ActionCodecContext getActionCodec(final Class<? extends Action<?, ?, ?>> action) {
 225         return root.getAction(action);
 226     }
 227
 228     @Override
 229     public ImmutableMap<String, LeafNodeCodecContext<?>> getLeafNodes(final Class<?> parentClass,
 230             final DataNodeContainer childSchema) {
 231         final Map<String, DataSchemaNode> getterToLeafSchema = new HashMap<>();
 232         for (final DataSchemaNode leaf : childSchema.getChildNodes()) {
 233             if (leaf instanceof TypedDataSchemaNode) {
 234                 getterToLeafSchema.put(BindingSchemaMapping.getGetterMethodName((TypedDataSchemaNode) leaf), leaf);
 235             }
 236         }
 237         return getLeafNodesUsingReflection(parentClass, getterToLeafSchema);
 238     }
 239
 240     private ImmutableMap<String, LeafNodeCodecContext<?>> getLeafNodesUsingReflection(final Class<?> parentClass,
 241             final Map<String, DataSchemaNode> getterToLeafSchema) {
 242         final Map<String, LeafNodeCodecContext<?>> leaves = new HashMap<>();
 243         for (final Method method : parentClass.getMethods()) {
 244             if (method.getParameterCount() == 0) {
 245                 final DataSchemaNode schema = getterToLeafSchema.get(method.getName());
 246                 final Class<?> valueType;
 247                 if (schema instanceof LeafSchemaNode) {
 248                     valueType = method.getReturnType();
 249                 } else if (schema instanceof LeafListSchemaNode) {
 250                     final Type genericType = ClassLoaderUtils.getFirstGenericParameter(method.getGenericReturnType());
 251
 252                     if (genericType instanceof Class<?>) {
 253                         valueType = (Class<?>) genericType;
 254                     } else if (genericType instanceof ParameterizedType) {
 255                         valueType = (Class<?>) ((ParameterizedType) genericType).getRawType();
 256                     } else {
 257                         throw new IllegalStateException("Unexpected return type " + genericType);
 258                     }
 259                 } else {
 260                     // We do not have schema for leaf, so we will ignore it (eg. getClass, getImplementedInterface).
 261                     continue;
 262                 }
 263                 final Codec<Object, Object> codec = getCodec(valueType, schema);
 264                 final LeafNodeCodecContext<?> leafNode = new LeafNodeCodecContext<>(schema, codec, method,
 265                         context.getSchemaContext());
 266                 leaves.put(schema.getQName().getLocalName(), leafNode);
 267             }
 268         }
 269         return ImmutableMap.copyOf(leaves);
 270     }
 271
 272     private Codec<Object, Object> getCodec(final Class<?> valueType, final DataSchemaNode schema) {
 273         checkArgument(schema instanceof TypedDataSchemaNode, "Unsupported leaf node type %s", schema);
 274         return getCodec(valueType, ((TypedDataSchemaNode)schema).getType());
 275     }
 276
 277     Codec<Object, Object> getCodec(final Class<?> valueType, final TypeDefinition<?> instantiatedType) {
 278         if (Class.class.equals(valueType)) {
 279             @SuppressWarnings({ "unchecked", "rawtypes" })
 280             final Codec<Object, Object> casted = (Codec) identityCodec;
 281             return casted;
 282         } else if (InstanceIdentifier.class.equals(valueType)) {
 283             @SuppressWarnings({ "unchecked", "rawtypes" })
 284             final Codec<Object, Object> casted = (Codec) instanceIdentifierCodec;
 285             return casted;
 286         } else if (Boolean.class.equals(valueType)) {
 287             if (instantiatedType instanceof EmptyTypeDefinition) {
 288                 return ValueTypeCodec.EMPTY_CODEC;
 289             }
 290         } else if (BindingReflections.isBindingClass(valueType)) {
 291             return getCodecForBindingClass(valueType, instantiatedType);
 292         }
 293         return ValueTypeCodec.NOOP_CODEC;
 294     }
 295
 296     @SuppressWarnings("checkstyle:illegalCatch")
 297     private Codec<Object, Object> getCodecForBindingClass(final Class<?> valueType, final TypeDefinition<?> typeDef) {
 298         if (typeDef instanceof IdentityrefTypeDefinition) {
 299             return ValueTypeCodec.encapsulatedValueCodecFor(valueType, typeDef, identityCodec);
 300         } else if (typeDef instanceof InstanceIdentifierTypeDefinition) {
 301             return ValueTypeCodec.encapsulatedValueCodecFor(valueType, typeDef, instanceIdentifierCodec);
 302         } else if (typeDef instanceof UnionTypeDefinition) {
 303             final Callable<UnionTypeCodec> loader = UnionTypeCodec.loader(valueType, (UnionTypeDefinition) typeDef,
 304                 this);
 305             try {
 306                 return loader.call();
 307             } catch (final Exception e) {
 308                 throw new IllegalStateException("Unable to load codec for " + valueType, e);
 309             }
 310         } else if (typeDef instanceof LeafrefTypeDefinition) {
 311             final Entry<GeneratedType, WithStatus> typeWithSchema = context.getTypeWithSchema(valueType);
 312             final WithStatus schema = typeWithSchema.getValue();
 313             checkState(schema instanceof TypeDefinition);
 314             return getCodec(valueType, (TypeDefinition<?>) schema);
 315         }
 316         return ValueTypeCodec.getCodecFor(valueType, typeDef);
 317     }
 318
 319     @Override
 320     public IdentifiableItemCodec getPathArgumentCodec(final Class<?> listClz, final ListSchemaNode schema) {
 321         final Class<? extends Identifier<?>> identifier = ClassLoaderUtils.findFirstGenericArgument(listClz,
 322                 Identifiable.class);
 323         final Map<QName, ValueContext> valueCtx = new HashMap<>();
 324         for (final LeafNodeCodecContext<?> leaf : getLeafNodes(identifier, schema).values()) {
 325             final QName name = leaf.getDomPathArgument().getNodeType();
 326             valueCtx.put(name, new ValueContext(identifier, leaf));
 327         }
 328         return IdentifiableItemCodec.of(schema, identifier, listClz, valueCtx);
 329     }
 330
 331     @SuppressWarnings("unchecked")
 332     @Override
 333     public <T extends DataObject> BindingCodecTreeNode<T> getSubtreeCodec(final InstanceIdentifier<T> path) {
 334         // TODO Do we need defensive check here?
 335         return (BindingCodecTreeNode<T>) getCodecContextNode(path, null);
 336     }
 337
 338     @Override
 339     public BindingCodecTreeNode<?> getSubtreeCodec(final YangInstanceIdentifier path) {
 340         return getCodecContextNode(path, null);
 341     }
 342
 343     @Override
 344     public BindingCodecTreeNode<?> getSubtreeCodec(final SchemaPath path) {
 345         throw new UnsupportedOperationException("Not implemented yet.");
 346     }
 347 }