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 java.util.Objects.requireNonNull;
12 import com.google.common.base.Throwables;
13 import com.google.common.collect.ImmutableList;
14 import java.lang.invoke.MethodHandle;
15 import java.lang.invoke.MethodHandles;
16 import java.lang.invoke.MethodType;
17 import java.lang.reflect.Constructor;
18 import java.util.ArrayList;
19 import java.util.Comparator;
20 import java.util.List;
22 import java.util.Map.Entry;
23 import org.eclipse.jdt.annotation.NonNull;
24 import org.opendaylight.mdsal.binding.spec.naming.BindingMapping;
25 import org.opendaylight.yangtools.concepts.AbstractIllegalArgumentCodec;
26 import org.opendaylight.yangtools.util.ImmutableOffsetMap;
27 import org.opendaylight.yangtools.util.ImmutableOffsetMapTemplate;
28 import org.opendaylight.yangtools.yang.binding.Identifiable;
29 import org.opendaylight.yangtools.yang.binding.Identifier;
30 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.IdentifiableItem;
31 import org.opendaylight.yangtools.yang.common.QName;
32 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
33 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
36 * Codec support for extracting the {@link Identifiable#key()} method return from a MapEntryNode.
38 abstract class IdentifiableItemCodec
39 extends AbstractIllegalArgumentCodec<NodeIdentifierWithPredicates, IdentifiableItem<?, ?>> {
40 private static final class SingleKey extends IdentifiableItemCodec {
41 private static final MethodType CTOR_TYPE = MethodType.methodType(Identifier.class, Object.class);
43 private final ValueContext keyContext;
44 private final MethodHandle ctor;
45 private final QName keyName;
47 SingleKey(final ListSchemaNode schema, final Class<? extends Identifier<?>> keyClass,
48 final Class<?> identifiable, final QName keyName, final ValueContext keyContext) {
49 super(schema, keyClass, identifiable);
50 this.keyContext = requireNonNull(keyContext);
51 this.keyName = requireNonNull(keyName);
52 ctor = getConstructor(keyClass).asType(CTOR_TYPE);
56 Identifier<?> deserializeIdentifierImpl(final NodeIdentifierWithPredicates nip) throws Throwable {
57 return (Identifier<?>) ctor.invokeExact(keyContext.deserialize(nip.getValue(keyName)));
61 NodeIdentifierWithPredicates serializeIdentifier(final QName qname, final Identifier<?> key) {
62 return NodeIdentifierWithPredicates.of(qname, keyName, keyContext.getAndSerialize(key));
66 private static final class MultiKey extends IdentifiableItemCodec {
67 private final ImmutableOffsetMapTemplate<QName> predicateTemplate;
68 private final ImmutableOffsetMap<QName, ValueContext> keyValueContexts;
69 private final ImmutableList<QName> keysInBindingOrder;
70 private final MethodHandle ctor;
72 MultiKey(final ListSchemaNode schema, final Class<? extends Identifier<?>> keyClass,
73 final Class<?> identifiable, final Map<QName, ValueContext> keyValueContexts) {
74 super(schema, keyClass, identifiable);
76 final MethodHandle tmpCtor = getConstructor(keyClass);
77 final MethodHandle inv = MethodHandles.spreadInvoker(tmpCtor.type(), 0);
78 this.ctor = inv.asType(inv.type().changeReturnType(Identifier.class)).bindTo(tmpCtor);
81 * We need to re-index to make sure we instantiate nodes in the order in which they are defined. We will
82 * also need to instantiate values in the same order.
84 final List<QName> keyDef = schema.getKeyDefinition();
85 predicateTemplate = ImmutableOffsetMapTemplate.ordered(keyDef);
86 this.keyValueContexts = predicateTemplate.instantiateTransformed(keyValueContexts, (key, value) -> value);
89 * When instantiating binding objects we need to specify constructor arguments in alphabetic order. If the
90 * order matches definition order, we try to reuse the key definition.
92 * BUG-2755: remove this if order is made declaration-order-dependent
94 final List<QName> tmp = new ArrayList<>(keyDef);
95 // This is not terribly efficient but gets the job done
96 tmp.sort(Comparator.comparing(qname -> BindingMapping.getPropertyName(qname.getLocalName())));
97 this.keysInBindingOrder = ImmutableList.copyOf(tmp.equals(keyDef) ? keyDef : tmp);
101 Identifier<?> deserializeIdentifierImpl(final NodeIdentifierWithPredicates nip) throws Throwable {
102 final Object[] bindingValues = new Object[keysInBindingOrder.size()];
104 for (final QName key : keysInBindingOrder) {
105 bindingValues[offset++] = keyValueContexts.get(key).deserialize(nip.getValue(key));
108 return (Identifier<?>) ctor.invokeExact(bindingValues);
112 NodeIdentifierWithPredicates serializeIdentifier(final QName qname, final Identifier<?> key) {
113 final Object[] values = new Object[keyValueContexts.size()];
115 for (final ValueContext valueCtx : keyValueContexts.values()) {
116 values[offset++] = valueCtx.getAndSerialize(key);
119 return NodeIdentifierWithPredicates.of(qname, predicateTemplate.instantiateWithValues(values));
123 private final Class<?> identifiable;
124 private final QName qname;
126 IdentifiableItemCodec(final ListSchemaNode schema, final Class<? extends Identifier<?>> keyClass,
127 final Class<?> identifiable) {
128 this.identifiable = requireNonNull(identifiable);
129 this.qname = schema.getQName();
132 static IdentifiableItemCodec of(final ListSchemaNode schema,
133 final Class<? extends Identifier<?>> keyClass, final Class<?> identifiable,
134 final Map<QName, ValueContext> keyValueContexts) {
135 switch (keyValueContexts.size()) {
137 throw new IllegalArgumentException("Key " + keyClass + " of " + identifiable + " has no components");
139 final Entry<QName, ValueContext> entry = keyValueContexts.entrySet().iterator().next();
140 return new SingleKey(schema, keyClass, identifiable, entry.getKey(), entry.getValue());
142 return new MultiKey(schema, keyClass, identifiable, keyValueContexts);
147 @SuppressWarnings({ "rawtypes", "unchecked" })
148 protected final IdentifiableItem<?, ?> deserializeImpl(final NodeIdentifierWithPredicates input) {
149 final Identifier<?> identifier = deserializeIdentifier(input);
150 return IdentifiableItem.of((Class) identifiable, (Identifier) identifier);
154 protected final NodeIdentifierWithPredicates serializeImpl(final IdentifiableItem<?, ?> input) {
155 return serializeIdentifier(qname, input.getKey());
158 @SuppressWarnings("checkstyle:illegalCatch")
159 final @NonNull Identifier<?> deserializeIdentifier(final NodeIdentifierWithPredicates input) {
161 return deserializeIdentifierImpl(input);
162 } catch (Throwable e) {
163 Throwables.throwIfUnchecked(e);
164 throw new IllegalStateException("Failed to deserialize " + input, e);
168 @SuppressWarnings("checkstyle:illegalThrows")
169 abstract @NonNull Identifier<?> deserializeIdentifierImpl(@NonNull NodeIdentifierWithPredicates nip)
172 abstract @NonNull NodeIdentifierWithPredicates serializeIdentifier(QName qname, Identifier<?> key);
174 static MethodHandle getConstructor(final Class<? extends Identifier<?>> clazz) {
175 for (@SuppressWarnings("rawtypes") final Constructor constr : clazz.getConstructors()) {
176 final Class<?>[] parameters = constr.getParameterTypes();
177 if (!clazz.equals(parameters[0])) {
178 // It is not copy constructor...
180 return MethodHandles.publicLookup().unreflectConstructor(constr);
181 } catch (IllegalAccessException e) {
182 throw new IllegalStateException("Cannot access constructor " + constr + " in class " + clazz, e);
186 throw new IllegalArgumentException("Supplied class " + clazz + "does not have required constructor.");