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.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;
13 import com.google.common.collect.Interner;
14 import com.google.common.collect.Interners;
15 import java.util.regex.Pattern;
16 import org.opendaylight.yangtools.concepts.Identifier;
17 import org.opendaylight.yangtools.concepts.Immutable;
18 import org.opendaylight.yangtools.objcache.ObjectCache;
19 import org.opendaylight.yangtools.objcache.ObjectCacheFactory;
20 import org.opendaylight.yangtools.yang.common.SimpleDateFormatUtil;
23 * Base class of YANG Schema source identifiers.
25 * Source identifiers are designated to be carry only necessary information to
26 * look-up YANG model source and to be used by various SchemaSourceProviders.
28 * (For further reference see: http://tools.ietf.org/html/rfc6020#section-5.2
29 * and http://tools.ietf.org/html/rfc6022#section-3.1 ).
32 public abstract class SourceIdentifier implements Identifier, Immutable {
34 * Default revision for sources without specified revision. Marks the source
37 public static final String NOT_PRESENT_FORMATTED_REVISION = "0000-00-00";
41 * Simplified compiled revision pattern in format YYYY-mm-dd, which checks
42 * only distribution of number elements.
44 * For checking if supplied string is real date, use
45 * {@link SimpleDateFormatUtil} instead.
48 public static final Pattern REVISION_PATTERN = Pattern.compile("\\d\\d\\d\\d-\\d\\d-\\d\\d");
50 private static final ObjectCache CACHE = ObjectCacheFactory.getObjectCache(SourceIdentifier.class);
51 private static final Interner<SourceIdentifier> INTERNER = Interners.newWeakInterner();
53 private static final long serialVersionUID = 1L;
54 private final String revision;
55 private final String name;
59 * Creates new YANG Schema source identifier for sources without revision.
60 * {@link SourceIdentifier#NOT_PRESENT_FORMATTED_REVISION} as default
66 SourceIdentifier(final String name) {
67 this(name, NOT_PRESENT_FORMATTED_REVISION);
71 * Creates new YANG Schema source identifier.
75 * @param formattedRevision
76 * Revision of source in format YYYY-mm-dd
78 SourceIdentifier(final String name, final String formattedRevision) {
79 this.name = Preconditions.checkNotNull(name);
80 this.revision = Preconditions.checkNotNull(formattedRevision);
85 * Creates new YANG Schema source identifier.
89 * @param formattedRevision
90 * Revision of source in format YYYY-mm-dd. If not present,
91 * default value will be used.
93 SourceIdentifier(final String name, final Optional<String> formattedRevision) {
94 this(name, formattedRevision.or(NOT_PRESENT_FORMATTED_REVISION));
98 * Return a cached reference to an object equal to this object.
100 * @return A potentially shared reference, not guaranteed to be unique.
103 public SourceIdentifier cachedReference() {
104 return CACHE.getReference(this);
108 * Return an interned reference to a equivalent SemVerSourceIdentifier.
110 * @return Interned reference, or this object if it was interned.
112 public SourceIdentifier intern() {
113 return INTERNER.intern(this);
121 public String getName() {
126 * Returns revision of source or null if revision was not supplied.
128 * @return revision of source or null if revision was not supplied.
130 public String getRevision() {
135 public static SourceIdentifier create(final String moduleName, final Optional<String> revision) {
136 return new RevisionSourceIdentifier(moduleName, revision);
140 * Returns filename for this YANG module as specified in RFC 6020.
142 * Returns filename in format <code>name ['@' revision] '.yang'</code>
144 * Where revision is date in format YYYY-mm-dd.
147 * @see <a href="http://tools.ietf.org/html/rfc6020#section-5.2">RFC6020</a>
149 * @return Filename for this source identifier.
151 public String toYangFilename() {
152 return toYangFileName(name, Optional.fromNullable(revision));
156 * Returns filename for this YANG module as specified in RFC 6020.
158 * Returns filename in format <code>moduleName ['@' revision] '.yang'</code>
160 * Where Where revision-date is in format YYYY-mm-dd.
163 * See http://tools.ietf.org/html/rfc6020#section-5.2
165 * @return Filename for this source identifier.
167 public static String toYangFileName(final String moduleName, final Optional<String> revision) {
168 StringBuilder filename = new StringBuilder(moduleName);
169 if (revision.isPresent()) {
170 filename.append('@');
171 filename.append(revision.get());
173 filename.append(".yang");
174 return filename.toString();