Java Matcher.appendTail方法代码示例

import com.google.re2j.Matcher; //导入方法依赖的package包/类
private Set<FileState> run(Iterable<FileState> files, Console console) throws IOException, ValidationException {
  Set<FileState> modifiedFiles = new HashSet<>();
  // TODO(malcon): Remove reconstructing pattern once RE2J doesn't synchronize on matching.
  Pattern batchPattern = Pattern.compile(pattern.pattern(), pattern.flags());
  for (FileState file : files) {
    if (Files.isSymbolicLink(file.getPath())) {
      continue;
    }
    String content = new String(Files.readAllBytes(file.getPath()), UTF_8);
    Matcher matcher = batchPattern.matcher(content);
    StringBuffer sb = new StringBuffer();
    boolean modified = false;
    while (matcher.find()) {
      List<String> users = Splitter.on(",").splitToList(matcher.group(2));
      List<String> mappedUsers = mapUsers(users, matcher.group(0), file.getPath(), console);
      modified |= !users.equals(mappedUsers);
      String result = matcher.group(1);
      if (!mappedUsers.isEmpty()) {
        result += "(" + Joiner.on(",").join(mappedUsers) + ")";
      }
      matcher.appendReplacement(sb, result);
    }
    matcher.appendTail(sb);

    if (modified) {
      modifiedFiles.add(file);
      Files.write(file.getPath(), sb.toString().getBytes(UTF_8));
    }
  }
  return modifiedFiles;
}
 

import com.google.re2j.Matcher; //导入方法依赖的package包/类
/**
 * Returns the freshly substituted SQL code.
 *
 * @throws IllegalArgumentException if any substitution variable is not found in the template,
 *         or if there are any variable-like strings (%something%) left after substitution.
 */
public String build() {
  StringBuffer result = new StringBuffer(template.length());
  Set<String> found = new HashSet<>();
  Matcher matcher = SEARCH_PATTERN.matcher(template);
  while (matcher.find()) {
    String wholeMatch = matcher.group(0);
    String leftQuote = matcher.group(1);
    String key = matcher.group(2);
    String rightQuote = matcher.group(3);
    String value = substitutions.get(key);
    checkArgumentNotNull(value, "%%s% found in template but no substitution specified", key);
    checkArgument(leftQuote.equals(rightQuote), "Quote mismatch: %s", wholeMatch);
    matcher.appendReplacement(result, String.format("%s%s%s", leftQuote, value, rightQuote));
    found.add(key);
  }
  matcher.appendTail(result);
  Set<String> remaining = difference(substitutions.keySet(), found);
  checkArgument(remaining.isEmpty(),
      "Not found in template: %s", Joiner.on(", ").join(remaining));
  return result.toString();
}
 

import com.google.re2j.Matcher; //导入方法依赖的package包/类
private String replaceLine(String line) {
  if (patternsToIgnore != null) {
    for (Pattern patternToIgnore : patternsToIgnore) {
      if (patternToIgnore.matches(line)) {
        return line;
      }
    }
  }

  Matcher matcher = before.matcher(line);
  StringBuffer sb = new StringBuffer();
  while (matcher.find()) {
    for (Collection<Integer> groupIndexes : repeatedGroups.asMap().values()) {
      // Check that all the references of the repeated group match the same string
      Iterator<Integer> iterator = groupIndexes.iterator();
      String value = matcher.group(iterator.next());
      while (iterator.hasNext()) {
        if (!value.equals(matcher.group(iterator.next()))) {
          return line;
        }
      }
    }
    String replaceTemplate;
    if (callback != null) {
      ImmutableMap.Builder<Integer, String> groupValues =
          ImmutableMap.builder();
      for (int i = 0; i <= matcher.groupCount(); i++) {
        groupValues.put(i, matcher.group(i));
      }
      replaceTemplate = callback.alter(groupValues.build(), afterReplaceTemplate);
    } else {
      replaceTemplate = afterReplaceTemplate;
    }

    matcher.appendReplacement(sb, replaceTemplate);
    if (firstOnly) {
      break;
    }
  }
  matcher.appendTail(sb);
  return sb.toString();
}