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.Identifiable;
28 import org.opendaylight.yangtools.yang.common.QName;
29 import org.opendaylight.yangtools.yang.common.QNameModule;
30 import org.opendaylight.yangtools.yang.common.Revision;
33 public final class BindingMapping {
35 public static final String VERSION = "0.6";
37 public static final Set<String> JAVA_RESERVED_WORDS = ImmutableSet.of(
38 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.9
39 "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue",
40 "default", "do", "double", "else", "enum", "extends", "final", "finally", "float", "for", "goto", "if",
41 "implements", "import", "instanceof", "int", "interface", "long", "native", "new", "package", "private",
42 "protected", "public", "return", "short", "static", "strictfp", "super", "switch", "synchronized", "this",
43 "throw", "throws", "transient", "try", "void", "volatile", "while", "_",
44 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.10.3
46 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.10.7
49 public static final String DATA_ROOT_SUFFIX = "Data";
50 public static final String RPC_SERVICE_SUFFIX = "Service";
51 public static final String NOTIFICATION_LISTENER_SUFFIX = "Listener";
52 public static final String QNAME_STATIC_FIELD_NAME = "QNAME";
53 public static final String PACKAGE_PREFIX = "org.opendaylight.yang.gen.v1";
54 public static final String AUGMENTATION_FIELD = "augmentation";
56 private static final Splitter CAMEL_SPLITTER = Splitter.on(CharMatcher.anyOf(" _.-/").precomputed())
57 .omitEmptyStrings().trimResults();
58 private static final Pattern COLON_SLASH_SLASH = Pattern.compile("://", Pattern.LITERAL);
59 private static final String QUOTED_DOT = Matcher.quoteReplacement(".");
60 private static final Splitter DOT_SPLITTER = Splitter.on('.');
62 public static final String MODULE_INFO_CLASS_NAME = "$YangModuleInfoImpl";
63 public static final String MODULE_INFO_QNAMEOF_METHOD_NAME = "qnameOf";
64 public static final String MODEL_BINDING_PROVIDER_CLASS_NAME = "$YangModelBindingProvider";
67 * Name of {@link Augmentable#augmentation(Class)}.
69 public static final String AUGMENTABLE_AUGMENTATION_NAME = "augmentation";
72 * Name of {@link Identifiable#key()}.
74 public static final String IDENTIFIABLE_KEY_NAME = "key";
76 public static final String RPC_INPUT_SUFFIX = "Input";
77 public static final String RPC_OUTPUT_SUFFIX = "Output";
79 private static final Interner<String> PACKAGE_INTERNER = Interners.newWeakInterner();
81 private BindingMapping() {
82 throw new UnsupportedOperationException("Utility class should not be instantiated");
85 public static String getRootPackageName(final QName module) {
86 return getRootPackageName(module.getModule());
89 public static String getRootPackageName(final QNameModule module) {
90 checkArgument(module != null, "Module must not be null");
91 checkArgument(module.getRevision() != null, "Revision must not be null");
92 checkArgument(module.getNamespace() != null, "Namespace must not be null");
93 final StringBuilder packageNameBuilder = new StringBuilder();
95 packageNameBuilder.append(BindingMapping.PACKAGE_PREFIX);
96 packageNameBuilder.append('.');
98 String namespace = module.getNamespace().toString();
99 namespace = COLON_SLASH_SLASH.matcher(namespace).replaceAll(QUOTED_DOT);
101 final char[] chars = namespace.toCharArray();
102 for (int i = 0; i < chars.length; ++i) {
123 packageNameBuilder.append(chars);
124 if (chars[chars.length - 1] != '.') {
125 packageNameBuilder.append('.');
128 final Optional<Revision> optRev = module.getRevision();
129 if (optRev.isPresent()) {
130 // Revision is in format 2017-10-26, we want the output to be 171026, which is a matter of picking the
132 final String rev = optRev.get().toString();
133 checkArgument(rev.length() == 10, "Unsupported revision %s", rev);
134 packageNameBuilder.append("rev");
135 packageNameBuilder.append(rev.substring(2, 4)).append(rev.substring(5, 7)).append(rev.substring(8));
137 // No-revision packages are special
138 packageNameBuilder.append("norev");
141 return normalizePackageName(packageNameBuilder.toString());
144 public static String normalizePackageName(final String packageName) {
145 if (packageName == null) {
149 final StringBuilder builder = new StringBuilder();
150 boolean first = true;
152 for (String p : DOT_SPLITTER.split(packageName.toLowerCase())) {
159 if (Character.isDigit(p.charAt(0)) || BindingMapping.JAVA_RESERVED_WORDS.contains(p)) {
165 // Prevent duplication of input string
166 return PACKAGE_INTERNER.intern(builder.toString());
169 public static String getClassName(final String localName) {
170 checkArgument(localName != null, "Name should not be null.");
171 return toFirstUpper(toCamelCase(localName));
174 public static String getClassName(final QName name) {
175 checkArgument(name != null, "Name should not be null.");
176 return toFirstUpper(toCamelCase(name.getLocalName()));
179 public static String getMethodName(final String yangIdentifier) {
180 checkArgument(yangIdentifier != null,"Identifier should not be null");
181 return toFirstLower(toCamelCase(yangIdentifier));
184 public static String getMethodName(final QName name) {
185 checkArgument(name != null, "Name should not be null.");
186 return getMethodName(name.getLocalName());
189 public static String getGetterSuffix(final QName name) {
190 checkArgument(name != null, "Name should not be null.");
191 final String candidate = toFirstUpper(toCamelCase(name.getLocalName()));
192 return "Class".equals(candidate) ? "XmlClass" : candidate;
195 public static String getPropertyName(final String yangIdentifier) {
196 final String potential = toFirstLower(toCamelCase(yangIdentifier));
197 if ("class".equals(potential)) {
203 private static String toCamelCase(final String rawString) {
204 checkArgument(rawString != null, "String should not be null");
205 Iterable<String> components = CAMEL_SPLITTER.split(rawString);
206 StringBuilder builder = new StringBuilder();
207 for (String comp : components) {
208 builder.append(toFirstUpper(comp));
210 return checkNumericPrefix(builder.toString());
213 private static String checkNumericPrefix(final String rawString) {
214 if (rawString == null || rawString.isEmpty()) {
217 char firstChar = rawString.charAt(0);
218 if (firstChar >= '0' && firstChar <= '9') {
219 return "_" + rawString;
226 * Returns the {@link String} {@code s} with an {@link Character#isUpperCase(char) upper case} first character. This
227 * function is null-safe.
229 * @param str the string that should get an upper case first character. May be <code>null</code>.
230 * @return the {@link String} {@code str} with an upper case first character or <code>null</code> if the input
231 * {@link String} {@code str} was <code>null</code>.
233 public static String toFirstUpper(final String str) {
234 if (str == null || str.length() == 0) {
237 if (Character.isUpperCase(str.charAt(0))) {
240 if (str.length() == 1) {
241 return str.toUpperCase();
243 return str.substring(0, 1).toUpperCase() + str.substring(1);
247 * Returns the {@link String} {@code s} with a {@link Character#isLowerCase(char) lower case} first character. This
248 * function is null-safe.
250 * @param str the string that should get an lower case first character. May be <code>null</code>.
251 * @return the {@link String} {@code str} with an lower case first character or <code>null</code> if the input
252 * {@link String} {@code str} was <code>null</code>.
254 private static String toFirstLower(final String str) {
255 if (str == null || str.length() == 0) {
258 if (Character.isLowerCase(str.charAt(0))) {
261 if (str.length() == 1) {
262 return str.toLowerCase();
264 return str.substring(0, 1).toLowerCase() + str.substring(1);
268 * Returns Java identifiers, conforming to JLS9 Section 3.8 to use for specified YANG assigned names
269 * (RFC7950 Section 9.6.4). This method considers two distinct encodings: one the pre-Fluorine mapping, which is
270 * okay and convenient for sane strings, and an escaping-based bijective mapping which works for all possible
273 * @param assignedNames Collection of assigned names
274 * @return A BiMap keyed by assigned name, with Java identifiers as values
275 * @throws NullPointerException if assignedNames is null or contains null items
276 * @throws IllegalArgumentException if any of the names is empty
278 public static BiMap<String, String> mapEnumAssignedNames(final Collection<String> assignedNames) {
280 * Original mapping assumed strings encountered are identifiers, hence it used getClassName to map the names
281 * and that function is not an injection -- this is evidenced in MDSAL-208 and results in a failure to compile
282 * generated code. If we encounter such a conflict or if the result is not a valid identifier (like '*'), we
283 * abort and switch the mapping schema to mapEnumAssignedName(), which is a bijection.
285 * Note that assignedNames can contain duplicates, which must not trigger a duplication fallback.
287 final BiMap<String, String> javaToYang = HashBiMap.create(assignedNames.size());
288 boolean valid = true;
289 for (String name : assignedNames) {
290 checkArgument(!name.isEmpty());
291 if (!javaToYang.containsValue(name)) {
292 final String mappedName = getClassName(name);
293 if (!isValidJavaIdentifier(mappedName) || javaToYang.forcePut(mappedName, name) != null) {
301 // Fall back to bijective mapping
303 for (String name : assignedNames) {
304 javaToYang.put(mapEnumAssignedName(name), name);
308 return javaToYang.inverse();
311 // See https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.8
312 private static boolean isValidJavaIdentifier(final String str) {
313 return !str.isEmpty() && !JAVA_RESERVED_WORDS.contains(str)
314 && Character.isJavaIdentifierStart(str.codePointAt(0))
315 && str.codePoints().skip(1).allMatch(Character::isJavaIdentifierPart);
318 private static String mapEnumAssignedName(final String assignedName) {
319 checkArgument(!assignedName.isEmpty());
322 // - if the string is a valid java identifier and does not contain '$', use it as-is
323 if (assignedName.indexOf('$') == -1 && isValidJavaIdentifier(assignedName)) {
327 // - otherwise prefix it with '$' and replace any invalid character (including '$') with '$XX$', where XX is
328 // hex-encoded unicode codepoint (including plane, stripping leading zeroes)
329 final StringBuilder sb = new StringBuilder().append('$');
330 assignedName.codePoints().forEachOrdered(codePoint -> {
331 if (codePoint == '$' || !Character.isJavaIdentifierPart(codePoint)) {
332 sb.append('$').append(Integer.toHexString(codePoint).toUpperCase(Locale.ROOT)).append('$');
334 sb.appendCodePoint(codePoint);
337 return sb.toString();