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.yangtools.yang.binding;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.base.CharMatcher;
13 import com.google.common.base.Splitter;
14 import com.google.common.collect.BiMap;
15 import com.google.common.collect.HashBiMap;
16 import com.google.common.collect.ImmutableSet;
17 import com.google.common.collect.Interner;
18 import com.google.common.collect.Interners;
19 import java.util.Collection;
20 import java.util.Locale;
21 import java.util.Optional;
23 import java.util.regex.Matcher;
24 import java.util.regex.Pattern;
25 import org.opendaylight.yangtools.yang.common.QName;
26 import org.opendaylight.yangtools.yang.common.QNameModule;
27 import org.opendaylight.yangtools.yang.common.Revision;
29 public final class BindingMapping {
31 public static final String VERSION = "0.6";
33 public static final Set<String> JAVA_RESERVED_WORDS = ImmutableSet.of(
34 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.9
35 "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue",
36 "default", "do", "double", "else", "enum", "extends", "final", "finally", "float", "for", "goto", "if",
37 "implements", "import", "instanceof", "int", "interface", "long", "native", "new", "package", "private",
38 "protected", "public", "return", "short", "static", "strictfp", "super", "switch", "synchronized", "this",
39 "throw", "throws", "transient", "try", "void", "volatile", "while", "_",
40 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.10.3
42 // https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.10.7
45 public static final String DATA_ROOT_SUFFIX = "Data";
46 public static final String RPC_SERVICE_SUFFIX = "Service";
47 public static final String NOTIFICATION_LISTENER_SUFFIX = "Listener";
48 public static final String QNAME_STATIC_FIELD_NAME = "QNAME";
49 public static final String PACKAGE_PREFIX = "org.opendaylight.yang.gen.v1";
50 public static final String AUGMENTATION_FIELD = "augmentation";
52 private static final Splitter CAMEL_SPLITTER = Splitter.on(CharMatcher.anyOf(" _.-/").precomputed())
53 .omitEmptyStrings().trimResults();
54 private static final Pattern COLON_SLASH_SLASH = Pattern.compile("://", Pattern.LITERAL);
55 private static final String QUOTED_DOT = Matcher.quoteReplacement(".");
56 private static final Splitter DOT_SPLITTER = Splitter.on('.');
58 public static final String MODULE_INFO_CLASS_NAME = "$YangModuleInfoImpl";
59 public static final String MODULE_INFO_QNAMEOF_METHOD_NAME = "qnameOf";
60 public static final String MODEL_BINDING_PROVIDER_CLASS_NAME = "$YangModelBindingProvider";
62 public static final String RPC_INPUT_SUFFIX = "Input";
63 public static final String RPC_OUTPUT_SUFFIX = "Output";
65 private static final String NEGATED_PATTERN_PREFIX = "^(?!";
66 private static final String NEGATED_PATTERN_SUFFIX = ").*$";
68 private static final Interner<String> PACKAGE_INTERNER = Interners.newWeakInterner();
70 private BindingMapping() {
71 throw new UnsupportedOperationException("Utility class should not be instantiated");
74 public static String getRootPackageName(final QName module) {
75 return getRootPackageName(module.getModule());
78 public static String getRootPackageName(final QNameModule module) {
79 checkArgument(module != null, "Module must not be null");
80 checkArgument(module.getRevision() != null, "Revision must not be null");
81 checkArgument(module.getNamespace() != null, "Namespace must not be null");
82 final StringBuilder packageNameBuilder = new StringBuilder();
84 packageNameBuilder.append(BindingMapping.PACKAGE_PREFIX);
85 packageNameBuilder.append('.');
87 String namespace = module.getNamespace().toString();
88 namespace = COLON_SLASH_SLASH.matcher(namespace).replaceAll(QUOTED_DOT);
90 final char[] chars = namespace.toCharArray();
91 for (int i = 0; i < chars.length; ++i) {
112 packageNameBuilder.append(chars);
113 if (chars[chars.length - 1] != '.') {
114 packageNameBuilder.append('.');
117 final Optional<Revision> optRev = module.getRevision();
118 if (optRev.isPresent()) {
119 // Revision is in format 2017-10-26, we want the output to be 171026, which is a matter of picking the
121 final String rev = optRev.get().toString();
122 checkArgument(rev.length() == 10, "Unsupported revision %s", rev);
123 packageNameBuilder.append("rev");
124 packageNameBuilder.append(rev.substring(2, 4)).append(rev.substring(5, 7)).append(rev.substring(8));
126 // No-revision packages are special
127 packageNameBuilder.append("norev");
130 return normalizePackageName(packageNameBuilder.toString());
133 public static String normalizePackageName(final String packageName) {
134 if (packageName == null) {
138 final StringBuilder builder = new StringBuilder();
139 boolean first = true;
141 for (String p : DOT_SPLITTER.split(packageName.toLowerCase())) {
148 if (Character.isDigit(p.charAt(0)) || BindingMapping.JAVA_RESERVED_WORDS.contains(p)) {
154 // Prevent duplication of input string
155 return PACKAGE_INTERNER.intern(builder.toString());
158 public static String getClassName(final String localName) {
159 checkArgument(localName != null, "Name should not be null.");
160 return toFirstUpper(toCamelCase(localName));
163 public static String getClassName(final QName name) {
164 checkArgument(name != null, "Name should not be null.");
165 return toFirstUpper(toCamelCase(name.getLocalName()));
168 public static String getMethodName(final String yangIdentifier) {
169 checkArgument(yangIdentifier != null,"Identifier should not be null");
170 return toFirstLower(toCamelCase(yangIdentifier));
173 public static String getMethodName(final QName name) {
174 checkArgument(name != null, "Name should not be null.");
175 return getMethodName(name.getLocalName());
178 public static String getGetterSuffix(final QName name) {
179 checkArgument(name != null, "Name should not be null.");
180 final String candidate = toFirstUpper(toCamelCase(name.getLocalName()));
181 return "Class".equals(candidate) ? "XmlClass" : candidate;
184 public static String getPropertyName(final String yangIdentifier) {
185 final String potential = toFirstLower(toCamelCase(yangIdentifier));
186 if ("class".equals(potential)) {
192 private static String toCamelCase(final String rawString) {
193 checkArgument(rawString != null, "String should not be null");
194 Iterable<String> components = CAMEL_SPLITTER.split(rawString);
195 StringBuilder builder = new StringBuilder();
196 for (String comp : components) {
197 builder.append(toFirstUpper(comp));
199 return checkNumericPrefix(builder.toString());
202 private static String checkNumericPrefix(final String rawString) {
203 if (rawString == null || rawString.isEmpty()) {
206 char firstChar = rawString.charAt(0);
207 if (firstChar >= '0' && firstChar <= '9') {
208 return "_" + rawString;
215 * Create a {@link Pattern} expression which performs inverted match to the specified pattern. The input pattern
216 * is expected to be a valid regular expression passing {@link Pattern#compile(String)} and to have both start and
217 * end of string anchors as the first and last characters.
219 * @param pattern Pattern regular expression to negate
220 * @return Negated regular expression
221 * @throws IllegalArgumentException if the pattern does not conform to expected structure
222 * @throws NullPointerException if pattern is null
224 public static String negatePatternString(final String pattern) {
225 checkArgument(pattern.charAt(0) == '^' && pattern.charAt(pattern.length() - 1) == '$',
226 "Pattern '%s' does not have expected format", pattern);
229 * Converting the expression into a negation is tricky. For example, when we have:
231 * pattern "a|b" { modifier invert-match; }
233 * this gets escaped into either "^a|b$" or "^(?:a|b)$". Either format can occur, as the non-capturing group
234 * strictly needed only in some cases. From that we want to arrive at:
235 * "^(?!(?:a|b)$).*$".
237 * ^^^ original expression
238 * ^^^^^^^^ tail of a grouped expression (without head anchor)
239 * ^^^^ ^^^^ inversion of match
241 * Inversion works by explicitly anchoring at the start of the string and then:
242 * - specifying a negative lookahead until the end of string
243 * - matching any string
244 * - anchoring at the end of the string
246 final boolean hasGroup = pattern.startsWith("^(?:") && pattern.endsWith(")$");
247 final int len = pattern.length();
248 final StringBuilder sb = new StringBuilder(len + (hasGroup ? 7 : 11)).append(NEGATED_PATTERN_PREFIX);
251 sb.append(pattern, 1, len);
253 sb.append("(?:").append(pattern, 1, len - 1).append(")$");
255 return sb.append(NEGATED_PATTERN_SUFFIX).toString();
259 * Check if the specified {@link Pattern} is the result of {@link #negatePatternString(String)}. This method
260 * assumes the pattern was not hand-coded but rather was automatically-generated, such that its non-automated
261 * parts come from XSD regular expressions. If this constraint is violated, this method may result false positives.
263 * @param pattern Pattern to check
264 * @return True if this pattern is a negation.
265 * @throws NullPointerException if pattern is null
266 * @throws IllegalArgumentException if the pattern does not conform to expected structure
268 public static boolean isNegatedPattern(final Pattern pattern) {
269 return isNegatedPattern(pattern.toString());
272 private static boolean isNegatedPattern(final String pattern) {
273 return pattern.startsWith(NEGATED_PATTERN_PREFIX) && pattern.endsWith(NEGATED_PATTERN_SUFFIX);
277 * Returns the {@link String} {@code s} with an {@link Character#isUpperCase(char) upper case} first character. This
278 * function is null-safe.
280 * @param str the string that should get an upper case first character. May be <code>null</code>.
281 * @return the {@link String} {@code str} with an upper case first character or <code>null</code> if the input
282 * {@link String} {@code str} was <code>null</code>.
284 public static String toFirstUpper(final String str) {
285 if (str == null || str.length() == 0) {
288 if (Character.isUpperCase(str.charAt(0))) {
291 if (str.length() == 1) {
292 return str.toUpperCase();
294 return str.substring(0, 1).toUpperCase() + str.substring(1);
298 * Returns the {@link String} {@code s} with a {@link Character#isLowerCase(char) lower case} first character. This
299 * function is null-safe.
301 * @param str the string that should get an lower case first character. May be <code>null</code>.
302 * @return the {@link String} {@code str} with an lower case first character or <code>null</code> if the input
303 * {@link String} {@code str} was <code>null</code>.
305 private static String toFirstLower(final String str) {
306 if (str == null || str.length() == 0) {
309 if (Character.isLowerCase(str.charAt(0))) {
312 if (str.length() == 1) {
313 return str.toLowerCase();
315 return str.substring(0, 1).toLowerCase() + str.substring(1);
319 * Returns Java identifiers, conforming to JLS9 Section 3.8 to use for specified YANG assigned names
320 * (RFC7950 Section 9.6.4). This method considers two distinct encodings: one the pre-Fluorine mapping, which is
321 * okay and convenient for sane strings, and an escaping-based bijective mapping which works for all possible
324 * @param assignedNames Collection of assigned names
325 * @return A BiMap keyed by assigned name, with Java identifiers as values
326 * @throws NullPointerException if assignedNames is null or contains null items
327 * @throws IllegalArgumentException if any of the names is empty
329 public static BiMap<String, String> mapEnumAssignedNames(final Collection<String> assignedNames) {
331 * Original mapping assumed strings encountered are identifiers, hence it used getClassName to map the names
332 * and that function is not an injection -- this is evidenced in MDSAL-208 and results in a failure to compile
333 * generated code. If we encounter such a conflict or if the result is not a valid identifier (like '*'), we
334 * abort and switch the mapping schema to mapEnumAssignedName(), which is a bijection.
336 * Note that assignedNames can contain duplicates, which must not trigger a duplication fallback.
338 final BiMap<String, String> javaToYang = HashBiMap.create(assignedNames.size());
339 boolean valid = true;
340 for (String name : assignedNames) {
341 checkArgument(!name.isEmpty());
342 if (!javaToYang.containsValue(name)) {
343 final String mappedName = getClassName(name);
344 if (!isValidJavaIdentifier(mappedName) || javaToYang.forcePut(mappedName, name) != null) {
352 // Fall back to bijective mapping
354 for (String name : assignedNames) {
355 javaToYang.put(mapEnumAssignedName(name), name);
359 return javaToYang.inverse();
362 // See https://docs.oracle.com/javase/specs/jls/se9/html/jls-3.html#jls-3.8
363 private static boolean isValidJavaIdentifier(final String str) {
364 return !str.isEmpty() && !JAVA_RESERVED_WORDS.contains(str)
365 && Character.isJavaIdentifierStart(str.codePointAt(0))
366 && str.codePoints().skip(1).allMatch(Character::isJavaIdentifierPart);
369 private static String mapEnumAssignedName(final String assignedName) {
370 checkArgument(!assignedName.isEmpty());
373 // - if the string is a valid java identifier and does not contain '$', use it as-is
374 if (assignedName.indexOf('$') == -1 && isValidJavaIdentifier(assignedName)) {
378 // - otherwise prefix it with '$' and replace any invalid character (including '$') with '$XX$', where XX is
379 // hex-encoded unicode codepoint (including plane, stripping leading zeroes)
380 final StringBuilder sb = new StringBuilder().append('$');
381 assignedName.codePoints().forEachOrdered(codePoint -> {
382 if (codePoint == '$' || !Character.isJavaIdentifierPart(codePoint)) {
383 sb.append('$').append(Integer.toHexString(codePoint).toUpperCase(Locale.ROOT)).append('$');
385 sb.appendCodePoint(codePoint);
388 return sb.toString();