2 * Copyright (c) 2013 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.spec.naming;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.annotations.Beta;
13 import com.google.common.base.CharMatcher;
14 import com.google.common.base.Splitter;
15 import com.google.common.collect.BiMap;
16 import com.google.common.collect.HashBiMap;
17 import com.google.common.collect.ImmutableSet;
18 import com.google.common.collect.Interner;
19 import com.google.common.collect.Interners;
20 import java.util.Collection;
21 import java.util.Locale;
22 import java.util.Optional;
24 import java.util.regex.Matcher;
25 import java.util.regex.Pattern;
26 import org.opendaylight.yangtools.yang.binding.Augmentable;
27 import org.opendaylight.yangtools.yang.binding.DataContainer;
28 import org.opendaylight.yangtools.yang.binding.Identifiable;
29 import org.opendaylight.yangtools.yang.common.QName;
30 import org.opendaylight.yangtools.yang.common.QNameModule;
31 import org.opendaylight.yangtools.yang.common.Revision;
34 public final class BindingMapping {
36 public static final String VERSION = "0.6";
38 public static final Set<String> JAVA_RESERVED_WORDS = ImmutableSet.of(
39 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.9
40 "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue",
41 "default", "do", "double", "else", "enum", "extends", "final", "finally", "float", "for", "goto", "if",
42 "implements", "import", "instanceof", "int", "interface", "long", "native", "new", "package", "private",
43 "protected", "public", "return", "short", "static", "strictfp", "super", "switch", "synchronized", "this",
44 "throw", "throws", "transient", "try", "void", "volatile", "while", "_",
45 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.10.3
47 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.10.7
50 public static final String DATA_ROOT_SUFFIX = "Data";
51 public static final String RPC_SERVICE_SUFFIX = "Service";
52 public static final String NOTIFICATION_LISTENER_SUFFIX = "Listener";
53 public static final String QNAME_STATIC_FIELD_NAME = "QNAME";
54 public static final String PACKAGE_PREFIX = "org.opendaylight.yang.gen.v1";
55 public static final String AUGMENTATION_FIELD = "augmentation";
57 private static final Splitter CAMEL_SPLITTER = Splitter.on(CharMatcher.anyOf(" _.-/").precomputed())
58 .omitEmptyStrings().trimResults();
59 private static final Pattern COLON_SLASH_SLASH = Pattern.compile("://", Pattern.LITERAL);
60 private static final String QUOTED_DOT = Matcher.quoteReplacement(".");
61 private static final Splitter DOT_SPLITTER = Splitter.on('.');
63 public static final String MODULE_INFO_CLASS_NAME = "$YangModuleInfoImpl";
64 public static final String MODULE_INFO_QNAMEOF_METHOD_NAME = "qnameOf";
65 public static final String MODEL_BINDING_PROVIDER_CLASS_NAME = "$YangModelBindingProvider";
68 * Name of {@link Augmentable#augmentation(Class)}.
70 public static final String AUGMENTABLE_AUGMENTATION_NAME = "augmentation";
73 * Name of {@link Identifiable#key()}.
75 public static final String IDENTIFIABLE_KEY_NAME = "key";
78 * Name of {@link DataContainer#getImplementedInterface()}.
80 public static final String DATA_CONTAINER_GET_IMPLEMENTED_INTERFACE_NAME = "getImplementedInterface";
82 public static final String RPC_INPUT_SUFFIX = "Input";
83 public static final String RPC_OUTPUT_SUFFIX = "Output";
85 private static final Interner<String> PACKAGE_INTERNER = Interners.newWeakInterner();
87 private BindingMapping() {
88 throw new UnsupportedOperationException("Utility class should not be instantiated");
91 public static String getRootPackageName(final QName module) {
92 return getRootPackageName(module.getModule());
95 public static String getRootPackageName(final QNameModule module) {
96 checkArgument(module != null, "Module must not be null");
97 checkArgument(module.getRevision() != null, "Revision must not be null");
98 checkArgument(module.getNamespace() != null, "Namespace must not be null");
99 final StringBuilder packageNameBuilder = new StringBuilder();
101 packageNameBuilder.append(BindingMapping.PACKAGE_PREFIX);
102 packageNameBuilder.append('.');
104 String namespace = module.getNamespace().toString();
105 namespace = COLON_SLASH_SLASH.matcher(namespace).replaceAll(QUOTED_DOT);
107 final char[] chars = namespace.toCharArray();
108 for (int i = 0; i < chars.length; ++i) {
129 packageNameBuilder.append(chars);
130 if (chars[chars.length - 1] != '.') {
131 packageNameBuilder.append('.');
134 final Optional<Revision> optRev = module.getRevision();
135 if (optRev.isPresent()) {
136 // Revision is in format 2017-10-26, we want the output to be 171026, which is a matter of picking the
138 final String rev = optRev.get().toString();
139 checkArgument(rev.length() == 10, "Unsupported revision %s", rev);
140 packageNameBuilder.append("rev");
141 packageNameBuilder.append(rev.substring(2, 4)).append(rev.substring(5, 7)).append(rev.substring(8));
143 // No-revision packages are special
144 packageNameBuilder.append("norev");
147 return normalizePackageName(packageNameBuilder.toString());
150 public static String normalizePackageName(final String packageName) {
151 if (packageName == null) {
155 final StringBuilder builder = new StringBuilder();
156 boolean first = true;
158 for (String p : DOT_SPLITTER.split(packageName.toLowerCase())) {
165 if (Character.isDigit(p.charAt(0)) || BindingMapping.JAVA_RESERVED_WORDS.contains(p)) {
171 // Prevent duplication of input string
172 return PACKAGE_INTERNER.intern(builder.toString());
175 public static String getClassName(final String localName) {
176 checkArgument(localName != null, "Name should not be null.");
177 return toFirstUpper(toCamelCase(localName));
180 public static String getClassName(final QName name) {
181 checkArgument(name != null, "Name should not be null.");
182 return toFirstUpper(toCamelCase(name.getLocalName()));
185 public static String getMethodName(final String yangIdentifier) {
186 checkArgument(yangIdentifier != null,"Identifier should not be null");
187 return toFirstLower(toCamelCase(yangIdentifier));
190 public static String getMethodName(final QName name) {
191 checkArgument(name != null, "Name should not be null.");
192 return getMethodName(name.getLocalName());
195 public static String getGetterSuffix(final QName name) {
196 checkArgument(name != null, "Name should not be null.");
197 final String candidate = toFirstUpper(toCamelCase(name.getLocalName()));
198 return "Class".equals(candidate) ? "XmlClass" : candidate;
201 public static String getPropertyName(final String yangIdentifier) {
202 final String potential = toFirstLower(toCamelCase(yangIdentifier));
203 if ("class".equals(potential)) {
209 private static String toCamelCase(final String rawString) {
210 checkArgument(rawString != null, "String should not be null");
211 Iterable<String> components = CAMEL_SPLITTER.split(rawString);
212 StringBuilder builder = new StringBuilder();
213 for (String comp : components) {
214 builder.append(toFirstUpper(comp));
216 return checkNumericPrefix(builder.toString());
219 private static String checkNumericPrefix(final String rawString) {
220 if (rawString == null || rawString.isEmpty()) {
223 char firstChar = rawString.charAt(0);
224 if (firstChar >= '0' && firstChar <= '9') {
225 return "_" + rawString;
232 * Returns the {@link String} {@code s} with an {@link Character#isUpperCase(char) upper case} first character. This
233 * function is null-safe.
235 * @param str the string that should get an upper case first character. May be <code>null</code>.
236 * @return the {@link String} {@code str} with an upper case first character or <code>null</code> if the input
237 * {@link String} {@code str} was <code>null</code>.
239 public static String toFirstUpper(final String str) {
240 if (str == null || str.length() == 0) {
243 if (Character.isUpperCase(str.charAt(0))) {
246 if (str.length() == 1) {
247 return str.toUpperCase();
249 return str.substring(0, 1).toUpperCase() + str.substring(1);
253 * Returns the {@link String} {@code s} with a {@link Character#isLowerCase(char) lower case} first character. This
254 * function is null-safe.
256 * @param str the string that should get an lower case first character. May be <code>null</code>.
257 * @return the {@link String} {@code str} with an lower case first character or <code>null</code> if the input
258 * {@link String} {@code str} was <code>null</code>.
260 private static String toFirstLower(final String str) {
261 if (str == null || str.length() == 0) {
264 if (Character.isLowerCase(str.charAt(0))) {
267 if (str.length() == 1) {
268 return str.toLowerCase();
270 return str.substring(0, 1).toLowerCase() + str.substring(1);
274 * Returns Java identifiers, conforming to JLS9 Section 3.8 to use for specified YANG assigned names
275 * (RFC7950 Section 9.6.4). This method considers two distinct encodings: one the pre-Fluorine mapping, which is
276 * okay and convenient for sane strings, and an escaping-based bijective mapping which works for all possible
279 * @param assignedNames Collection of assigned names
280 * @return A BiMap keyed by assigned name, with Java identifiers as values
281 * @throws NullPointerException if assignedNames is null or contains null items
282 * @throws IllegalArgumentException if any of the names is empty
284 public static BiMap<String, String> mapEnumAssignedNames(final Collection<String> assignedNames) {
286 * Original mapping assumed strings encountered are identifiers, hence it used getClassName to map the names
287 * and that function is not an injection -- this is evidenced in MDSAL-208 and results in a failure to compile
288 * generated code. If we encounter such a conflict or if the result is not a valid identifier (like '*'), we
289 * abort and switch the mapping schema to mapEnumAssignedName(), which is a bijection.
291 * Note that assignedNames can contain duplicates, which must not trigger a duplication fallback.
293 final BiMap<String, String> javaToYang = HashBiMap.create(assignedNames.size());
294 boolean valid = true;
295 for (String name : assignedNames) {
296 checkArgument(!name.isEmpty());
297 if (!javaToYang.containsValue(name)) {
298 final String mappedName = getClassName(name);
299 if (!isValidJavaIdentifier(mappedName) || javaToYang.forcePut(mappedName, name) != null) {
307 // Fall back to bijective mapping
309 for (String name : assignedNames) {
310 javaToYang.put(mapEnumAssignedName(name), name);
314 return javaToYang.inverse();
317 // See https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.8
318 private static boolean isValidJavaIdentifier(final String str) {
319 return !str.isEmpty() && !JAVA_RESERVED_WORDS.contains(str)
320 && Character.isJavaIdentifierStart(str.codePointAt(0))
321 && str.codePoints().skip(1).allMatch(Character::isJavaIdentifierPart);
324 private static String mapEnumAssignedName(final String assignedName) {
325 checkArgument(!assignedName.isEmpty());
328 // - if the string is a valid java identifier and does not contain '$', use it as-is
329 if (assignedName.indexOf('$') == -1 && isValidJavaIdentifier(assignedName)) {
333 // - otherwise prefix it with '$' and replace any invalid character (including '$') with '$XX$', where XX is
334 // hex-encoded unicode codepoint (including plane, stripping leading zeroes)
335 final StringBuilder sb = new StringBuilder().append('$');
336 assignedName.codePoints().forEachOrdered(codePoint -> {
337 if (codePoint == '$' || !Character.isJavaIdentifierPart(codePoint)) {
338 sb.append('$').append(Integer.toHexString(codePoint).toUpperCase(Locale.ROOT)).append('$');
340 sb.appendCodePoint(codePoint);
343 return sb.toString();