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/eplv10.html
8 package org.opendaylight.yangtools.yang.model.repo.api;
10 import com.google.common.annotations.Beta;
11 import com.google.common.base.Optional;
12 import com.google.common.base.Preconditions;
14 import org.opendaylight.yangtools.concepts.Identifier;
15 import org.opendaylight.yangtools.concepts.Immutable;
16 import org.opendaylight.yangtools.objcache.ObjectCache;
17 import org.opendaylight.yangtools.objcache.ObjectCacheFactory;
20 * YANG Schema source identifier
22 * Simple transfer object represents identifier of source for YANG schema (module or submodule),
25 * <li>YANG schema name ({@link #getName()}
26 * <li>Module revision (optional) ({link {@link #getRevision()})
29 * Source identifier is designated to be carry only necessary information
30 * to look-up YANG model source and to be used by various SchemaSourceProviders.
32 * <b>Note:</b>On source retrieval layer it is impossible to distinguish
33 * between YANG module and/or submodule unless source is present.
36 * (For further reference see: http://tools.ietf.org/html/rfc6020#section-5.2 and
37 * http://tools.ietf.org/html/rfc6022#section-3.1 ).
40 public final class SourceIdentifier implements Identifier, Immutable {
42 * Default revision for sources without specified revision.
43 * Marks the source as oldest.
45 public static final String NOT_PRESENT_FORMATTED_REVISION = "0000-00-00";
47 private static final ObjectCache CACHE = ObjectCacheFactory.getObjectCache(SourceIdentifier.class);
48 private static final long serialVersionUID = 1L;
49 private final String revision;
50 private final String name;
53 * Creates new YANG Schema source identifier.
55 * @param name Name of schema
56 * @param formattedRevision Revision of source in format YYYY-mm-dd
58 public SourceIdentifier(final String name, final String formattedRevision) {
59 this.name = Preconditions.checkNotNull(name);
60 this.revision = Preconditions.checkNotNull(formattedRevision);
65 * Creates new YANG Schema source identifier.
67 * @param name Name of schema
68 * @param formattedRevision Revision of source in format YYYY-mm-dd. If not present, default value will be used.
70 public SourceIdentifier(final String name, final Optional<String> formattedRevision) {
71 this(name, formattedRevision.or(NOT_PRESENT_FORMATTED_REVISION));
75 * Return a cached reference to an object equal to this object.
77 * @return A potentially shared reference, not guaranteed to be unique.
79 public SourceIdentifier cachedReference() {
80 return CACHE.getReference(this);
85 * Creates new YANG Schema source identifier for sources without revision.
86 * {@link SourceIdentifier#NOT_PRESENT_FORMATTED_REVISION} as default revision.
88 * @param name Name of schema
90 public SourceIdentifier(final String name) {
91 this(name, NOT_PRESENT_FORMATTED_REVISION);
99 public String getName() {
104 * Returns revision of source or null if revision was not supplied.
106 * @return revision of source or null if revision was not supplied.
108 public String getRevision() {
113 public int hashCode() {
114 final int prime = 31;
116 result = prime * result + ((name == null) ? 0 : name.hashCode());
117 result = prime * result + ((revision == null) ? 0 : revision.hashCode());
122 public boolean equals(final Object obj) {
129 if (getClass() != obj.getClass()) {
132 SourceIdentifier other = (SourceIdentifier) obj;
134 if (other.name != null) {
137 } else if (!name.equals(other.name)) {
140 if (revision == null) {
141 if (other.revision != null) {
144 } else if (!revision.equals(other.revision)) {
150 public static SourceIdentifier create(final String moduleName, final Optional<String> revision) {
151 return new SourceIdentifier(moduleName, revision);
155 * Returns filename for this YANG module as specified in RFC 6020.
157 * Returns filename in format
158 * <code>name ['@' revision] '.yang'</code>
160 * Where revision is date in format YYYY-mm-dd.
163 * @see <a href="http://tools.ietf.org/html/rfc6020#section-5.2">RFC6020</a>
165 * @return Filename for this source identifier.
167 public String toYangFilename() {
168 return toYangFileName(name, Optional.fromNullable(revision));
172 public String toString() {
173 return "SourceIdentifier [name=" + name + "@" + revision + "]";
177 * Returns filename for this YANG module as specified in RFC 6020.
179 * Returns filename in format
180 * <code>moduleName ['@' revision] '.yang'</code>
182 * Where Where revision-date is in format YYYY-mm-dd.
186 * http://tools.ietf.org/html/rfc6020#section-5.2
188 * @return Filename for this source identifier.
190 public static final String toYangFileName(final String moduleName, final Optional<String> revision) {
191 StringBuilder filename = new StringBuilder(moduleName);
192 if (revision.isPresent()) {
193 filename.append('@');
194 filename.append(revision.get());
196 filename.append(".yang");
197 return filename.toString();