* javadoc for details.
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class CommonPattern {
  public abstract CommonMatcher matcher(CharSequence t);

  public abstract String pattern();

  public abstract int flags();

  // Re-declare this as abstract to force subclasses to override.
  @Override
  public abstract String toString();

        return Base64.getUrlEncoder().encodeToString(path.getBytes(Constants.CHARSET_UTF_8));
    }

    protected boolean isTarget(final String path) {
        return pattern.matcher(path).find();
    }

    protected abstract DictionaryFile<? extends DictionaryItem> newDictionaryFile(String id, String path, Date timestamp);

                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "none"
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "available 10.13.1.25:9000"
            },
            "properties": [
              {
                "id": "color",
                "value": {

        Predicate<Artifact> predGroupId = a -> groupId.matches(createPathProxy(a.getGroupId()));
        Predicate<Artifact> predArtifactId = a -> artifactId.matches(createPathProxy(a.getArtifactId()));
        return predGroupId.and(predArtifactId);
    }

    /**
     * In order to reuse the glob matcher from the filesystem, we need

   * used in FilenameFilter.)
   */
  @Override
  public boolean accept(File dir, String fileName) {
    return pattern.matcher(fileName).matches();
  }

        metadata.merge(new Metadata());

        String dateAfter = gregorianDate();

        String ts = metadata.metadata.getVersioning().getSnapshot().getTimestamp();
        String datePart = DATE_FILTER.matcher(ts).replaceAll("");

        /* Allow for this test running across midnight */
        Set<String> expected = new HashSet<>(Arrays.asList(dateBefore, dateAfter));

    private static int getRelationOrder(String value, RangeValue rangeValue, boolean isLeft) {
        if (rangeValue.value.isEmpty()) {
            return isLeft ? 1 : -1;
        }

        value = FILTER_1.matcher(value).replaceAll("");

        List<String> valueTokens = new ArrayList<>(Arrays.asList(FILTER_2.split(value)));
        List<String> rangeValueTokens = new ArrayList<>(Arrays.asList(FILTER_3.split(rangeValue.value)));

        if (StringUtil.isNotBlank(regex)) {
            final Pattern pattern = Pattern.compile(regex);
            System.getProperties().keySet().stream().filter(k -> k != null && pattern.matcher(k.toString()).matches())
                    .forEach(k -> addSystemProperty(cmdList, k.toString(), null, null));
        }
    }

    protected void deleteTempDir(final File ownTmpDir) {
        if (ownTmpDir == null) {

                contentList.add(content);
            }
            for (final Pair<Pattern, String> regexData : pair.getSecond()) {
                if (regexData.getFirst().matcher(query).matches()) {
                    contentList.add(regexData.getSecond().replace(queryPlaceHolder, query));
                }
            }
            return contentList.toArray(new String[contentList.size()]);
        }

    This PR fixes a security issue where an IAM user based
    on his policy is granted more privileges than restricted
    by the users IAM policy.

    This is due to an issue of prefix based Matcher() function
    which was incorrectly matching prefix based on resource
    prefixes instead of exact match.
```