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