+++ /dev/null
-/*
- * Copyright (c) 2017 Cisco Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-package org.opendaylight.yangtools.yang.parser.rfc7950.stmt.pattern;
-
-import com.google.common.collect.ImmutableSet;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import java.util.regex.PatternSyntaxException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Utilities for converting YANG XSD regexes into Java-compatible regexes.
- */
-final class RegexUtils {
- private static final Logger LOG = LoggerFactory.getLogger(RegexUtils.class);
- private static final Pattern BETWEEN_CURLY_BRACES_PATTERN = Pattern.compile("\\{(.+?)\\}");
- private static final ImmutableSet<String> JAVA_UNICODE_BLOCKS = ImmutableSet.<String>builder()
- .add("AegeanNumbers")
- .add("AlchemicalSymbols")
- .add("AlphabeticPresentationForms")
- .add("AncientGreekMusicalNotation")
- .add("AncientGreekNumbers")
- .add("AncientSymbols")
- .add("Arabic")
- .add("ArabicPresentationForms-A")
- .add("ArabicPresentationForms-B")
- .add("ArabicSupplement")
- .add("Armenian")
- .add("Arrows")
- .add("Avestan")
- .add("Balinese")
- .add("Bamum")
- .add("BamumSupplement")
- .add("BasicLatin")
- .add("Batak")
- .add("Bengali")
- .add("BlockElements")
- .add("Bopomofo")
- .add("BopomofoExtended")
- .add("BoxDrawing")
- .add("Brahmi")
- .add("BraillePatterns")
- .add("Buginese")
- .add("Buhid")
- .add("ByzantineMusicalSymbols")
- .add("Carian")
- .add("Cham")
- .add("Cherokee")
- .add("CJKCompatibility")
- .add("CJKCompatibilityForms")
- .add("CJKCompatibilityIdeographs")
- .add("CJKCompatibilityIdeographsSupplement")
- .add("CJKRadicalsSupplement")
- .add("CJKStrokes")
- .add("CJKSymbolsandPunctuation")
- .add("CJKUnifiedIdeographs")
- .add("CJKUnifiedIdeographsExtensionA")
- .add("CJKUnifiedIdeographsExtensionB")
- .add("CJKUnifiedIdeographsExtensionC")
- .add("CJKUnifiedIdeographsExtensionD")
- .add("CombiningDiacriticalMarks")
- .add("CombiningDiacriticalMarksSupplement")
- .add("CombiningHalfMarks")
- .add("CombiningDiacriticalMarksforSymbols")
- .add("CommonIndicNumberForms")
- .add("ControlPictures")
- .add("Coptic")
- .add("CountingRodNumerals")
- .add("Cuneiform")
- .add("CuneiformNumbersandPunctuation")
- .add("CurrencySymbols")
- .add("CypriotSyllabary")
- .add("Cyrillic")
- .add("CyrillicExtended-A")
- .add("CyrillicExtended-B")
- .add("CyrillicSupplementary")
- .add("Deseret")
- .add("Devanagari")
- .add("DevanagariExtended")
- .add("Dingbats")
- .add("DominoTiles")
- .add("EgyptianHieroglyphs")
- .add("Emoticons")
- .add("EnclosedAlphanumericSupplement")
- .add("EnclosedAlphanumerics")
- .add("EnclosedCJKLettersandMonths")
- .add("EnclosedIdeographicSupplement")
- .add("Ethiopic")
- .add("EthiopicExtended")
- .add("EthiopicExtended-A")
- .add("EthiopicSupplement")
- .add("GeneralPunctuation")
- .add("GeometricShapes")
- .add("Georgian")
- .add("GeorgianSupplement")
- .add("Glagolitic")
- .add("Gothic")
- .add("GreekandCoptic")
- .add("GreekExtended")
- .add("Gujarati")
- .add("Gurmukhi")
- .add("HalfwidthandFullwidthForms")
- .add("HangulCompatibilityJamo")
- .add("HangulJamo")
- .add("HangulJamoExtended-A")
- .add("HangulJamoExtended-B")
- .add("HangulSyllables")
- .add("Hanunoo")
- .add("Hebrew")
- .add("HighPrivateUseSurrogates")
- .add("HighSurrogates")
- .add("Hiragana")
- .add("IdeographicDescriptionCharacters")
- .add("ImperialAramaic")
- .add("InscriptionalPahlavi")
- .add("InscriptionalParthian")
- .add("IPAExtensions")
- .add("Javanese")
- .add("Kaithi")
- .add("KanaSupplement")
- .add("Kanbun")
- .add("Kangxi Radicals")
- .add("Kannada")
- .add("Katakana")
- .add("KatakanaPhoneticExtensions")
- .add("KayahLi")
- .add("Kharoshthi")
- .add("Khmer")
- .add("KhmerSymbols")
- .add("Lao")
- .add("Latin-1Supplement")
- .add("LatinExtended-A")
- .add("LatinExtendedAdditional")
- .add("LatinExtended-B")
- .add("LatinExtended-C")
- .add("LatinExtended-D")
- .add("Lepcha")
- .add("LetterlikeSymbols")
- .add("Limbu")
- .add("LinearBIdeograms")
- .add("LinearBSyllabary")
- .add("Lisu")
- .add("LowSurrogates")
- .add("Lycian")
- .add("Lydian")
- .add("MahjongTiles")
- .add("Malayalam")
- .add("Mandaic")
- .add("MathematicalAlphanumericSymbols")
- .add("MathematicalOperators")
- .add("MeeteiMayek")
- .add("MiscellaneousMathematicalSymbols-A")
- .add("MiscellaneousMathematicalSymbols-B")
- .add("MiscellaneousSymbols")
- .add("MiscellaneousSymbolsandArrows")
- .add("MiscellaneousSymbolsAndPictographs")
- .add("MiscellaneousTechnical")
- .add("ModifierToneLetters")
- .add("Mongolian")
- .add("MusicalSymbols")
- .add("Myanmar")
- .add("MyanmarExtended-A")
- .add("NewTaiLue")
- .add("NKo")
- .add("NumberForms")
- .add("Ogham")
- .add("OlChiki")
- .add("OldItalic")
- .add("OldPersian")
- .add("OldSouthArabian")
- .add("OldTurkic")
- .add("OpticalCharacterRecognition")
- .add("Oriya")
- .add("Osmanya")
- .add("Phags-pa")
- .add("PhaistosDisc")
- .add("Phoenician")
- .add("PhoneticExtensions")
- .add("PhoneticExtensionsSupplement")
- .add("PlayingCards")
- .add("PrivateUseArea")
- .add("Rejang")
- .add("RumiNumeralSymbols")
- .add("Runic")
- .add("Samaritan")
- .add("Saurashtra")
- .add("Shavian")
- .add("Sinhala")
- .add("SmallFormVariants")
- .add("SpacingModifierLetters")
- .add("Specials")
- .add("Sundanese")
- .add("SuperscriptsandSubscripts")
- .add("SupplementalArrows-A")
- .add("SupplementalArrows-B")
- .add("SupplementalMathematicalOperators")
- .add("SupplementalPunctuation")
- .add("SupplementaryPrivateUseArea-A")
- .add("SupplementaryPrivateUseArea-B")
- .add("SylotiNagri")
- .add("Syriac")
- .add("Tagalog")
- .add("Tagbanwa")
- .add("Tags")
- .add("TaiLe")
- .add("TaiTham")
- .add("TaiViet")
- .add("TaiXuanJingSymbols")
- .add("Tamil")
- .add("Telugu")
- .add("Thaana")
- .add("Thai")
- .add("Tibetan")
- .add("Tifinagh")
- .add("TransportAndMapSymbols")
- .add("Ugaritic")
- .add("UnifiedCanadianAboriginalSyllabics")
- .add("UnifiedCanadianAboriginalSyllabicsExtended")
- .add("Vai")
- .add("VariationSelectors")
- .add("VariationSelectorsSupplement")
- .add("VedicExtensions")
- .add("VerticalForms")
- .add("YiRadicals")
- .add("YiSyllables")
- .add("YijingHexagramSymbols").build();
-
- private static final int UNICODE_SCRIPT_FIX_COUNTER = 30;
-
- private RegexUtils() {
- // Hidden on purpose
- }
-
- /**
- * Converts XSD regex to Java-compatible regex.
- *
- * @param xsdRegex XSD regex pattern as it is defined in a YANG source
- * @return Java-compatible regex
- */
- static String getJavaRegexFromXSD(final String xsdRegex) {
- // Note: we are using a non-capturing group to deal with internal structure issues, like branches and similar.
- return "^(?:" + fixUnicodeScriptPattern(escapeChars(xsdRegex)) + ")$";
- }
-
- /*
- * As both '^' and '$' are special anchor characters in java regular
- * expressions which are implicitly present in XSD regular expressions,
- * we need to escape them in case they are not defined as part of
- * character ranges i.e. inside regular square brackets.
- */
- private static String escapeChars(final String regex) {
- final StringBuilder result = new StringBuilder(regex.length());
- int bracket = 0;
- boolean escape = false;
- for (int i = 0; i < regex.length(); i++) {
- final char ch = regex.charAt(i);
- switch (ch) {
- case '[':
- if (!escape) {
- bracket++;
- }
- escape = false;
- result.append(ch);
- break;
- case ']':
- if (!escape) {
- bracket--;
- }
- escape = false;
- result.append(ch);
- break;
- case '\\':
- escape = !escape;
- result.append(ch);
- break;
- case '^':
- case '$':
- if (bracket == 0) {
- result.append('\\');
- }
- escape = false;
- result.append(ch);
- break;
- default:
- escape = false;
- result.append(ch);
- }
- }
- return result.toString();
- }
-
- private static String fixUnicodeScriptPattern(String rawPattern) {
- for (int i = 0; i < UNICODE_SCRIPT_FIX_COUNTER; i++) {
- try {
- Pattern.compile(rawPattern);
- return rawPattern;
- } catch (final PatternSyntaxException ex) {
- LOG.debug("Invalid regex pattern syntax in: {}", rawPattern, ex);
- final String msg = ex.getMessage();
- if (msg.startsWith("Unknown character script name")
- || msg.startsWith("Unknown character property name")) {
- rawPattern = fixUnknownScripts(msg, rawPattern);
- } else {
- return rawPattern;
- }
- }
- }
-
- LOG.warn("Regex pattern could not be fixed: {}", rawPattern);
- return rawPattern;
- }
-
- private static String fixUnknownScripts(final String exMessage, final String rawPattern) {
- StringBuilder result = new StringBuilder(rawPattern);
- final Matcher matcher = BETWEEN_CURLY_BRACES_PATTERN.matcher(exMessage);
- if (matcher.find()) {
- String capturedGroup = matcher.group(1);
- if (capturedGroup.startsWith("In/Is")) {
- // Java 9 changed the reporting string
- capturedGroup = capturedGroup.substring(5);
- }
-
- if (JAVA_UNICODE_BLOCKS.contains(capturedGroup)) {
- final int idx = rawPattern.indexOf("Is" + capturedGroup);
- result = result.replace(idx, idx + 2, "In");
- }
- }
- return result.toString();
- }
-}
Code Review / yangtools.git / blobdiff