2 * Copyright (c) 2019 Pantheon Technologies, s.r.o. 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.yangtools.yang.model.util;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.annotations.Beta;
13 import com.google.common.collect.ImmutableBiMap;
14 import java.io.IOException;
15 import java.io.NotSerializableException;
16 import java.io.ObjectInputStream;
17 import java.io.ObjectOutputStream;
18 import java.io.ObjectStreamException;
19 import org.eclipse.jdt.annotation.NonNull;
20 import org.opendaylight.yangtools.yang.common.BiMapYangNamespaceContext;
21 import org.opendaylight.yangtools.yang.common.QNameModule;
22 import org.opendaylight.yangtools.yang.common.YangNamespaceContext;
23 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
26 * Utility {@link YangNamespaceContext} backed by a SchemaContext, resolving namespaces to their module names. This
27 * is useful for implementing namespace resolution according to
28 * <a href="https://www.rfc-editor.org/rfc/rfc7951#section-4">RFC7951 Section 4</a>.
31 * When multiple revisions of a particular namespace are present in the backing SchemaContext, this ambiguity is
32 * resolved by using the latest revision available.
35 public final class ModuleNameNamespaceContext implements YangNamespaceContext {
37 private static final long serialVersionUID = 2L;
39 private final @NonNull EffectiveModelContext modelContext;
41 public ModuleNameNamespaceContext(final EffectiveModelContext modelContext) {
42 this.modelContext = requireNonNull(modelContext);
46 * Convert this object to an equivalent {@link BiMapYangNamespaceContext}.
48 * @return A BiMapYangNamespaceContext.
50 public BiMapYangNamespaceContext toBiMap() {
51 final var builder = ImmutableBiMap.<String, QNameModule>builder();
52 for (var module : modelContext.getModuleStatements().values()) {
53 final var name = module.argument().getLocalName();
54 builder.put(name, findNamespaceForPrefix(name).orElseThrow());
56 return new BiMapYangNamespaceContext(builder.build());
60 public QNameModule namespaceForPrefix(final String prefix) {
61 final var modules = modelContext.findModuleStatements(prefix).iterator();
62 return modules.hasNext() ? modules.next().localQNameModule() : null;
66 public String prefixForNamespace(final QNameModule namespace) {
67 return modelContext.findModuleStatement(namespace)
68 .map(module -> module.argument().getLocalName())
73 private Object writeReplace() {
78 private void readObject(final ObjectInputStream stream) throws IOException, ClassNotFoundException {
83 private void readObjectNoData() throws ObjectStreamException {
88 private void writeObject(final ObjectOutputStream stream) throws IOException {
92 private static void throwNSE() throws NotSerializableException {
93 throw new NotSerializableException(ModuleNameNamespaceContext.class.getName());