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#implementedInterface()}.
80 public static final String DATA_CONTAINER_IMPLEMENTED_INTERFACE_NAME = "implementedInterface";
83 * Prefix for getter methods working on top of boolean.
85 public static final String BOOLEAN_GETTER_PREFIX = "is";
88 * Prefix for normal getter methods.
90 public static final String GETTER_PREFIX = "get";
93 * Prefix for non-null default wrapper methods. These methods always wrap a corresponding normal getter.
95 public static final String NONNULL_PREFIX = "nonnull";
97 public static final String RPC_INPUT_SUFFIX = "Input";
98 public static final String RPC_OUTPUT_SUFFIX = "Output";
100 private static final Interner<String> PACKAGE_INTERNER = Interners.newWeakInterner();
102 private BindingMapping() {
103 throw new UnsupportedOperationException("Utility class should not be instantiated");
106 public static String getRootPackageName(final QName module) {
107 return getRootPackageName(module.getModule());
110 public static String getRootPackageName(final QNameModule module) {
111 checkArgument(module != null, "Module must not be null");
112 checkArgument(module.getRevision() != null, "Revision must not be null");
113 checkArgument(module.getNamespace() != null, "Namespace must not be null");
114 final StringBuilder packageNameBuilder = new StringBuilder();
116 packageNameBuilder.append(BindingMapping.PACKAGE_PREFIX);
117 packageNameBuilder.append('.');
119 String namespace = module.getNamespace().toString();
120 namespace = COLON_SLASH_SLASH.matcher(namespace).replaceAll(QUOTED_DOT);
122 final char[] chars = namespace.toCharArray();
123 for (int i = 0; i < chars.length; ++i) {
144 packageNameBuilder.append(chars);
145 if (chars[chars.length - 1] != '.') {
146 packageNameBuilder.append('.');
149 final Optional<Revision> optRev = module.getRevision();
150 if (optRev.isPresent()) {
151 // Revision is in format 2017-10-26, we want the output to be 171026, which is a matter of picking the
153 final String rev = optRev.get().toString();
154 checkArgument(rev.length() == 10, "Unsupported revision %s", rev);
155 packageNameBuilder.append("rev").append(rev, 2, 4).append(rev, 5, 7).append(rev.substring(8));
157 // No-revision packages are special
158 packageNameBuilder.append("norev");
161 return normalizePackageName(packageNameBuilder.toString());
164 public static String normalizePackageName(final String packageName) {
165 if (packageName == null) {
169 final StringBuilder builder = new StringBuilder();
170 boolean first = true;
172 for (String p : DOT_SPLITTER.split(packageName.toLowerCase(Locale.ENGLISH))) {
179 if (Character.isDigit(p.charAt(0)) || BindingMapping.JAVA_RESERVED_WORDS.contains(p)) {
185 // Prevent duplication of input string
186 return PACKAGE_INTERNER.intern(builder.toString());
189 public static String getClassName(final String localName) {
190 checkArgument(localName != null, "Name should not be null.");
191 return toFirstUpper(toCamelCase(localName));
194 public static String getClassName(final QName name) {
195 checkArgument(name != null, "Name should not be null.");
196 return toFirstUpper(toCamelCase(name.getLocalName()));
199 public static String getMethodName(final String yangIdentifier) {
200 checkArgument(yangIdentifier != null,"Identifier should not be null");
201 return toFirstLower(toCamelCase(yangIdentifier));
204 public static String getMethodName(final QName name) {
205 checkArgument(name != null, "Name should not be null.");
206 return getMethodName(name.getLocalName());
209 public static String getGetterPrefix(final boolean isBoolean) {
210 return isBoolean ? BOOLEAN_GETTER_PREFIX : GETTER_PREFIX;
213 public static String getGetterMethodName(final String localName, final boolean isBoolean) {
214 return getGetterPrefix(isBoolean) + toFirstUpper(getPropertyName(localName));
217 public static String getGetterMethodName(final QName name, final boolean isBoolean) {
218 return getGetterPrefix(isBoolean) + getGetterSuffix(name);
221 public static boolean isGetterMethodName(final String methodName) {
222 return methodName.startsWith(GETTER_PREFIX) || methodName.startsWith(BOOLEAN_GETTER_PREFIX);
225 public static String getGetterMethodForNonnull(final String methodName) {
226 checkArgument(isNonnullMethodName(methodName));
227 return GETTER_PREFIX + methodName.substring(NONNULL_PREFIX.length());
230 public static String getNonnullMethodName(final String localName) {
231 return NONNULL_PREFIX + toFirstUpper(getPropertyName(localName));
234 public static boolean isNonnullMethodName(final String methodName) {
235 return methodName.startsWith(NONNULL_PREFIX);
238 public static String getGetterSuffix(final QName name) {
239 checkArgument(name != null, "Name should not be null.");
240 final String candidate = toFirstUpper(toCamelCase(name.getLocalName()));
241 return "Class".equals(candidate) ? "XmlClass" : candidate;
244 public static String getPropertyName(final String yangIdentifier) {
245 final String potential = toFirstLower(toCamelCase(yangIdentifier));
246 if ("class".equals(potential)) {
252 private static String toCamelCase(final String rawString) {
253 checkArgument(rawString != null, "String should not be null");
254 Iterable<String> components = CAMEL_SPLITTER.split(rawString);
255 StringBuilder builder = new StringBuilder();
256 for (String comp : components) {
257 builder.append(toFirstUpper(comp));
259 return checkNumericPrefix(builder.toString());
262 private static String checkNumericPrefix(final String rawString) {
263 if (rawString == null || rawString.isEmpty()) {
266 final char firstChar = rawString.charAt(0);
267 return firstChar >= '0' && firstChar <= '9' ? "_" + rawString : rawString;
271 * Returns the {@link String} {@code s} with an {@link Character#isUpperCase(char) upper case} first character. This
272 * function is null-safe.
274 * @param str the string that should get an upper case first character. May be <code>null</code>.
275 * @return the {@link String} {@code str} with an upper case first character or <code>null</code> if the input
276 * {@link String} {@code str} was <code>null</code>.
278 public static String toFirstUpper(final String str) {
279 if (str == null || str.length() == 0) {
282 if (Character.isUpperCase(str.charAt(0))) {
285 if (str.length() == 1) {
286 return str.toUpperCase(Locale.ENGLISH);
288 return str.substring(0, 1).toUpperCase(Locale.ENGLISH) + str.substring(1);
292 * Returns the {@link String} {@code s} with a {@link Character#isLowerCase(char) lower case} first character. This
293 * function is null-safe.
295 * @param str the string that should get an lower case first character. May be <code>null</code>.
296 * @return the {@link String} {@code str} with an lower case first character or <code>null</code> if the input
297 * {@link String} {@code str} was <code>null</code>.
299 private static String toFirstLower(final String str) {
300 if (str == null || str.length() == 0) {
303 if (Character.isLowerCase(str.charAt(0))) {
306 if (str.length() == 1) {
307 return str.toLowerCase(Locale.ENGLISH);
309 return str.substring(0, 1).toLowerCase(Locale.ENGLISH) + str.substring(1);
313 * Returns Java identifiers, conforming to JLS9 Section 3.8 to use for specified YANG assigned names
314 * (RFC7950 Section 9.6.4). This method considers two distinct encodings: one the pre-Fluorine mapping, which is
315 * okay and convenient for sane strings, and an escaping-based bijective mapping which works for all possible
318 * @param assignedNames Collection of assigned names
319 * @return A BiMap keyed by assigned name, with Java identifiers as values
320 * @throws NullPointerException if assignedNames is null or contains null items
321 * @throws IllegalArgumentException if any of the names is empty
323 public static BiMap<String, String> mapEnumAssignedNames(final Collection<String> assignedNames) {
325 * Original mapping assumed strings encountered are identifiers, hence it used getClassName to map the names
326 * and that function is not an injection -- this is evidenced in MDSAL-208 and results in a failure to compile
327 * generated code. If we encounter such a conflict or if the result is not a valid identifier (like '*'), we
328 * abort and switch the mapping schema to mapEnumAssignedName(), which is a bijection.
330 * Note that assignedNames can contain duplicates, which must not trigger a duplication fallback.
332 final BiMap<String, String> javaToYang = HashBiMap.create(assignedNames.size());
333 boolean valid = true;
334 for (String name : assignedNames) {
335 checkArgument(!name.isEmpty());
336 if (!javaToYang.containsValue(name)) {
337 final String mappedName = getClassName(name);
338 if (!isValidJavaIdentifier(mappedName) || javaToYang.forcePut(mappedName, name) != null) {
346 // Fall back to bijective mapping
348 for (String name : assignedNames) {
349 javaToYang.put(mapEnumAssignedName(name), name);
353 return javaToYang.inverse();
356 // See https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.8
357 private static boolean isValidJavaIdentifier(final String str) {
358 return !str.isEmpty() && !JAVA_RESERVED_WORDS.contains(str)
359 && Character.isJavaIdentifierStart(str.codePointAt(0))
360 && str.codePoints().skip(1).allMatch(Character::isJavaIdentifierPart);
363 private static String mapEnumAssignedName(final String assignedName) {
364 checkArgument(!assignedName.isEmpty());
367 // - if the string is a valid java identifier and does not contain '$', use it as-is
368 if (assignedName.indexOf('$') == -1 && isValidJavaIdentifier(assignedName)) {
372 // - otherwise prefix it with '$' and replace any invalid character (including '$') with '$XX$', where XX is
373 // hex-encoded unicode codepoint (including plane, stripping leading zeroes)
374 final StringBuilder sb = new StringBuilder().append('$');
375 assignedName.codePoints().forEachOrdered(codePoint -> {
376 if (codePoint == '$' || !Character.isJavaIdentifierPart(codePoint)) {
377 sb.append('$').append(Integer.toHexString(codePoint).toUpperCase(Locale.ROOT)).append('$');
379 sb.appendCodePoint(codePoint);
382 return sb.toString();