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;
13 import com.google.common.base.MoreObjects;
14 import com.google.common.base.MoreObjects.ToStringHelper;
15 import com.google.common.collect.ImmutableMap;
16 import java.lang.reflect.InvocationHandler;
17 import java.lang.reflect.InvocationTargetException;
18 import java.lang.reflect.Method;
19 import java.lang.reflect.Proxy;
20 import java.util.Arrays;
22 import java.util.Objects;
23 import java.util.Optional;
24 import java.util.concurrent.ConcurrentHashMap;
25 import org.opendaylight.mdsal.binding.dom.codec.util.AugmentationReader;
26 import org.opendaylight.mdsal.binding.spec.naming.BindingMapping;
27 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
28 import org.opendaylight.yangtools.yang.binding.Augmentable;
29 import org.opendaylight.yangtools.yang.binding.Augmentation;
30 import org.opendaylight.yangtools.yang.binding.DataObject;
31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
32 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
33 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
34 import org.slf4j.Logger;
35 import org.slf4j.LoggerFactory;
37 class LazyDataObject<D extends DataObject> implements InvocationHandler, AugmentationReader {
39 private static final Logger LOG = LoggerFactory.getLogger(LazyDataObject.class);
40 private static final String GET_IMPLEMENTED_INTERFACE = "getImplementedInterface";
41 private static final String TO_STRING = "toString";
42 private static final String EQUALS = "equals";
43 private static final String HASHCODE = "hashCode";
44 private static final String AUGMENTATIONS = "augmentations";
45 private static final Object NULL_VALUE = new Object();
47 private final ConcurrentHashMap<Method, Object> cachedData = new ConcurrentHashMap<>();
48 private final NormalizedNodeContainer<?, PathArgument, NormalizedNode<?, ?>> data;
49 private final DataObjectCodecContext<D,?> context;
51 private volatile ImmutableMap<Class<? extends Augmentation<?>>, Augmentation<?>> cachedAugmentations = null;
52 private volatile Integer cachedHashcode = null;
54 @SuppressWarnings({ "rawtypes", "unchecked" })
55 LazyDataObject(final DataObjectCodecContext<D,?> ctx, final NormalizedNodeContainer data) {
56 this.context = requireNonNull(ctx, "Context must not be null");
57 this.data = requireNonNull(data, "Data must not be null");
61 public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
62 if (method.getParameterTypes().length == 0) {
63 final String name = method.getName();
64 if (GET_IMPLEMENTED_INTERFACE.equals(name)) {
65 return context.getBindingClass();
66 } else if (TO_STRING.equals(name)) {
67 return bindingToString();
68 } else if (HASHCODE.equals(name)) {
69 return bindingHashCode();
70 } else if (AUGMENTATIONS.equals(name)) {
71 return getAugmentationsImpl();
73 return getBindingData(method);
74 } else if (BindingMapping.AUGMENTABLE_AUGMENTATION_NAME.equals(method.getName())) {
75 return getAugmentationImpl((Class<?>) args[0]);
76 } else if (EQUALS.equals(method.getName())) {
77 return bindingEquals(args[0]);
79 throw new UnsupportedOperationException("Unsupported method " + method);
82 private boolean bindingEquals(final Object other) {
86 final Class<D> bindingClass = context.getBindingClass();
87 if (!bindingClass.isAssignableFrom(other.getClass())) {
91 for (final Method m : context.getHashCodeAndEqualsMethods()) {
92 final Object thisValue = getBindingData(m);
93 final Object otherValue = m.invoke(other);
95 * added for valid byte array comparison, when list key type is binary
96 * deepEquals is not used since it does excessive amount of instanceof calls.
98 if (thisValue instanceof byte[] && otherValue instanceof byte[]) {
99 if (!Arrays.equals((byte[]) thisValue, (byte[]) otherValue)) {
102 } else if (!Objects.equals(thisValue, otherValue)) {
107 if (Augmentable.class.isAssignableFrom(bindingClass)) {
108 if (!getAugmentationsImpl().equals(getAllAugmentations(other))) {
112 } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
113 LOG.warn("Can not determine equality of {} and {}", this, other, e);
119 private static Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAllAugmentations(final Object dataObject) {
120 if (dataObject instanceof AugmentationReader) {
121 return ((AugmentationReader) dataObject).getAugmentations(dataObject);
122 } else if (dataObject instanceof Augmentable<?>) {
123 return BindingReflections.getAugmentations((Augmentable<?>) dataObject);
126 throw new IllegalArgumentException("Unable to get all augmentations from " + dataObject);
129 private Integer bindingHashCode() {
130 final Integer ret = cachedHashcode;
135 final int prime = 31;
137 for (final Method m : context.getHashCodeAndEqualsMethods()) {
138 final Object value = getBindingData(m);
139 result = prime * result + Objects.hashCode(value);
141 if (Augmentable.class.isAssignableFrom(context.getBindingClass())) {
142 result = prime * result + getAugmentationsImpl().hashCode();
144 cachedHashcode = result;
148 private Object getBindingData(final Method method) {
149 Object cached = cachedData.get(method);
150 if (cached == null) {
151 final Object readedValue = context.getBindingChildValue(method, data);
152 cached = readedValue == null ? NULL_VALUE : readedValue;
154 final Object raced = cachedData.putIfAbsent(method, cached);
156 // Load/store raced, we should return the stored value
161 return cached == NULL_VALUE ? null : cached;
164 private Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAugmentationsImpl() {
165 ImmutableMap<Class<? extends Augmentation<?>>, Augmentation<?>> ret = cachedAugmentations;
167 synchronized (this) {
168 ret = cachedAugmentations;
170 ret = ImmutableMap.copyOf(context.getAllAugmentationsFrom(data));
171 cachedAugmentations = ret;
180 public Map<Class<? extends Augmentation<?>>, Augmentation<?>> getAugmentations(final Object obj) {
181 checkArgument(this == Proxy.getInvocationHandler(obj),
182 "Supplied object is not associated with this proxy handler");
184 return getAugmentationsImpl();
187 private Object getAugmentationImpl(final Class<?> cls) {
188 requireNonNull(cls, "Supplied augmentation must not be null.");
190 final ImmutableMap<Class<? extends Augmentation<?>>, Augmentation<?>> aug = cachedAugmentations;
195 @SuppressWarnings({"unchecked","rawtypes"})
196 final Optional<DataContainerCodecContext<?, ?>> optAugCtx = context.possibleStreamChild((Class) cls);
197 if (optAugCtx.isPresent()) {
198 final DataContainerCodecContext<?, ?> augCtx = optAugCtx.get();
199 // Due to binding specification not representing grouping instantiations we can end up having the same
200 // augmentation applied to a grouping multiple times. While these augmentations have the same shape, they
201 // are still represented by distinct binding classes and therefore we need to make sure the result matches
202 // the augmentation the user is requesting -- otherwise a strict receiver would end up with a cryptic
203 // ClassCastException.
204 if (cls.isAssignableFrom(augCtx.getBindingClass())) {
205 final Optional<NormalizedNode<?, ?>> augData = data.getChild(augCtx.getDomPathArgument());
206 if (augData.isPresent()) {
207 return augCtx.deserialize(augData.get());
214 public String bindingToString() {
215 final Class<D> bindingClass = context.getBindingClass();
216 final ToStringHelper helper = MoreObjects.toStringHelper(bindingClass).omitNullValues();
218 for (final Method m : context.getHashCodeAndEqualsMethods()) {
219 helper.add(m.getName(), getBindingData(m));
221 if (Augmentable.class.isAssignableFrom(bindingClass)) {
222 helper.add("augmentations", getAugmentationsImpl());
224 return helper.toString();
228 public int hashCode() {
229 final int prime = 31;
231 result = prime * result + context.hashCode();
232 result = prime * result + data.hashCode();
237 public boolean equals(final Object obj) {
244 if (getClass() != obj.getClass()) {
247 final LazyDataObject<?> other = (LazyDataObject<?>) obj;
248 return Objects.equals(context, other.context) && Objects.equals(data, other.data);