2 * Copyright (c) 2016 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.common;
10 import com.google.common.annotations.Beta;
11 import com.google.common.base.CharMatcher;
12 import java.util.AbstractMap.SimpleEntry;
13 import java.util.Map.Entry;
14 import org.eclipse.jdt.annotation.NonNull;
15 import org.eclipse.jdt.annotation.Nullable;
18 * Utility class for handling various naming conventions mentioned in YANG and related specifications.
20 * @author Robert Varga
23 public final class YangNames {
25 * A {@link CharMatcher} matching the first character of a YANG {@code identifier} ABNF production,
26 * {@code (ALPHA / "_")}.
28 public static final @NonNull CharMatcher IDENTIFIER_START =
29 CharMatcher.inRange('A', 'Z').or(CharMatcher.inRange('a', 'z').or(CharMatcher.is('_'))).precomputed();
31 * A {@link CharMatcher} NOT matching second and later characters of a YANG {@code identifier} ABNF production,
32 * {@code (ALPHA / DIGIT / "_" / "-" / ".")}.
34 public static final @NonNull CharMatcher NOT_IDENTIFIER_PART =
35 IDENTIFIER_START.or(CharMatcher.inRange('0', '9')).or(CharMatcher.anyOf("-.")).negate().precomputed();
42 * Parse a file name according to rules outlined in https://tools.ietf.org/html/rfc6020#section-5.2. Input string
43 * should be the base path with file extension stripped.
45 * @param baseName file base name
46 * @return A tuple containing the module name and parsed revision, if present.
47 * @throws NullPointerException if {@code baseName} is null
49 public static @NonNull Entry<@NonNull String, @Nullable String> parseFilename(final String baseName) {
50 final int zavinac = baseName.lastIndexOf('@');
52 return new SimpleEntry<>(baseName, null);
55 return new SimpleEntry<>(baseName.substring(0, zavinac), baseName.substring(zavinac + 1));