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.mdsal.binding.dom.codec.impl;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
12 import static org.opendaylight.mdsal.binding.spec.naming.BindingMapping.AUGMENTABLE_AUGMENTATION_NAME;
13 import static org.opendaylight.mdsal.binding.spec.naming.BindingMapping.DATA_CONTAINER_GET_IMPLEMENTED_INTERFACE_NAME;
15 import com.google.common.base.MoreObjects;
16 import com.google.common.base.MoreObjects.ToStringHelper;
17 import com.google.common.collect.ImmutableMap;
18 import java.lang.reflect.InvocationHandler;
19 import java.lang.reflect.InvocationTargetException;
20 import java.lang.reflect.Method;
21 import java.lang.reflect.Proxy;
22 import java.util.Arrays;
24 import java.util.Objects;
25 import java.util.Optional;
26 import java.util.concurrent.ConcurrentHashMap;
27 import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
28 import org.opendaylight.mdsal.binding.dom.codec.util.AugmentationReader;
29 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
30 import org.opendaylight.yangtools.yang.binding.Augmentable;
31 import org.opendaylight.yangtools.yang.binding.Augmentation;
32 import org.opendaylight.yangtools.yang.binding.DataObject;
33 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
34 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
36 import org.slf4j.Logger;
37 import org.slf4j.LoggerFactory;
39 class LazyDataObject<D extends DataObject> implements InvocationHandler, AugmentationReader {
41 private static final Logger LOG = LoggerFactory.getLogger(LazyDataObject.class);
42 private static final String TO_STRING = "toString";
43 private static final String EQUALS = "equals";
44 private static final String HASHCODE = "hashCode";
45 private static final String AUGMENTATIONS = "augmentations";
46 private static final Object NULL_VALUE = new Object();
48 private final ConcurrentHashMap<Method, Object> cachedData = new ConcurrentHashMap<>();
49 private final NormalizedNodeContainer<?, PathArgument, NormalizedNode<?, ?>> data;
50 private final DataObjectCodecContext<D,?> context;
52 @SuppressWarnings("rawtypes")
53 private static final AtomicReferenceFieldUpdater<LazyDataObject, ImmutableMap> CACHED_AUGMENTATIONS_UPDATER =
54 AtomicReferenceFieldUpdater.newUpdater(LazyDataObject.class, ImmutableMap.class, "cachedAugmentations");
55 private volatile ImmutableMap<Class<? extends Augmentation<?>>, Augmentation<?>> cachedAugmentations = null;
56 private volatile Integer cachedHashcode = null;
58 @SuppressWarnings({ "rawtypes", "unchecked" })
59 LazyDataObject(final DataObjectCodecContext<D,?> ctx, final NormalizedNodeContainer data) {
60 this.context = requireNonNull(ctx, "Context must not be null");
61 this.data = requireNonNull(data, "Data must not be null");
65 public Object invoke(final Object proxy, final Method method, final Object[] args) {
66 if (method.getParameterCount() == 0) {
67 final String name = method.getName();
68 if (DATA_CONTAINER_GET_IMPLEMENTED_INTERFACE_NAME.equals(name)) {
69 return context.getBindingClass();
70 } else if (TO_STRING.equals(name)) {
71 return bindingToString();
72 } else if (HASHCODE.equals(name)) {
73 return bindingHashCode();
74 } else if (AUGMENTATIONS.equals(name)) {
75 return getAugmentationsImpl();
77 return getBindingData(method);
78 } else if (AUGMENTABLE_AUGMENTATION_NAME.equals(method.getName())) {
79 return getAugmentationImpl((Class<?>) args[0]);
80 } else if (EQUALS.equals(method.getName())) {
81 return bindingEquals(args[0]);
83 throw new UnsupportedOperationException("Unsupported method " + method);
86 private boolean bindingEquals(final Object other) {
90 final Class<D> bindingClass = context.getBindingClass();
91 if (!bindingClass.isAssignableFrom(other.getClass())) {
95 for (final Method m : context.getHashCodeAndEqualsMethods()) {
96 final Object thisValue = getBindingData(m);
97 final Object otherValue = m.invoke(other);
99 * added for valid byte array comparison, when list key type is binary
100 * deepEquals is not used since it does excessive amount of instanceof calls.
102 if (thisValue instanceof byte[] && otherValue instanceof byte[]) {
103 if (!Arrays.equals((byte[]) thisValue, (byte[]) otherValue)) {
106 } else if (!Objects.equals(thisValue, otherValue)) {
111 if (Augmentable.class.isAssignableFrom(bindingClass)) {
112 if (!getAugmentationsImpl().equals(getAllAugmentations(other))) {
116 } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
117 LOG.warn("Can not determine equality of {} and {}", this, other, e);
123 private static Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAllAugmentations(final Object dataObject) {
124 if (dataObject instanceof AugmentationReader) {
125 return ((AugmentationReader) dataObject).getAugmentations(dataObject);
126 } else if (dataObject instanceof Augmentable<?>) {
127 return BindingReflections.getAugmentations((Augmentable<?>) dataObject);
130 throw new IllegalArgumentException("Unable to get all augmentations from " + dataObject);
133 private Integer bindingHashCode() {
134 final Integer ret = cachedHashcode;
139 final int prime = 31;
141 for (final Method m : context.getHashCodeAndEqualsMethods()) {
142 final Object value = getBindingData(m);
143 result = prime * result + Objects.hashCode(value);
145 if (Augmentable.class.isAssignableFrom(context.getBindingClass())) {
146 result = prime * result + getAugmentationsImpl().hashCode();
148 cachedHashcode = result;
152 private Object getBindingData(final Method method) {
153 Object cached = cachedData.get(method);
154 if (cached == null) {
155 final Object readedValue = context.getBindingChildValue(method, data);
156 cached = readedValue == null ? NULL_VALUE : readedValue;
158 final Object raced = cachedData.putIfAbsent(method, cached);
160 // Load/store raced, we should return the stored value
165 return cached == NULL_VALUE ? null : cached;
168 private Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAugmentationsImpl() {
169 ImmutableMap<Class<? extends Augmentation<?>>, Augmentation<?>> local = cachedAugmentations;
174 local = ImmutableMap.copyOf(context.getAllAugmentationsFrom(data));
175 return CACHED_AUGMENTATIONS_UPDATER.compareAndSet(this, null, local) ? local : cachedAugmentations;
179 public Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAugmentations(final Object obj) {
180 checkArgument(this == Proxy.getInvocationHandler(obj),
181 "Supplied object is not associated with this proxy handler");
183 return getAugmentationsImpl();
186 private Object getAugmentationImpl(final Class<?> cls) {
187 requireNonNull(cls, "Supplied augmentation must not be null.");
189 final ImmutableMap<Class<? extends Augmentation<?>>, Augmentation<?>> aug = cachedAugmentations;
194 @SuppressWarnings({"unchecked","rawtypes"})
195 final Optional<DataContainerCodecContext<?, ?>> optAugCtx = context.possibleStreamChild((Class) cls);
196 if (optAugCtx.isPresent()) {
197 final DataContainerCodecContext<?, ?> augCtx = optAugCtx.get();
198 // Due to binding specification not representing grouping instantiations we can end up having the same
199 // augmentation applied to a grouping multiple times. While these augmentations have the same shape, they
200 // are still represented by distinct binding classes and therefore we need to make sure the result matches
201 // the augmentation the user is requesting -- otherwise a strict receiver would end up with a cryptic
202 // ClassCastException.
203 if (cls.isAssignableFrom(augCtx.getBindingClass())) {
204 final Optional<NormalizedNode<?, ?>> augData = data.getChild(augCtx.getDomPathArgument());
205 if (augData.isPresent()) {
206 return augCtx.deserialize(augData.get());
213 public String bindingToString() {
214 final Class<D> bindingClass = context.getBindingClass();
215 final ToStringHelper helper = MoreObjects.toStringHelper(bindingClass).omitNullValues();
217 for (final Method m : context.getHashCodeAndEqualsMethods()) {
218 helper.add(m.getName(), getBindingData(m));
220 if (Augmentable.class.isAssignableFrom(bindingClass)) {
221 helper.add("augmentations", getAugmentationsImpl());
223 return helper.toString();
227 public int hashCode() {
228 final int prime = 31;
230 result = prime * result + context.hashCode();
231 result = prime * result + data.hashCode();
236 public boolean equals(final Object obj) {
243 if (getClass() != obj.getClass()) {
246 final LazyDataObject<?> other = (LazyDataObject<?>) obj;
247 return Objects.equals(context, other.context) && Objects.equals(data, other.data);