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Diffstat (limited to 'kamon-core/src/main/java/kamon/util/GlobPathFilter.java')
-rw-r--r-- | kamon-core/src/main/java/kamon/util/GlobPathFilter.java | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/kamon-core/src/main/java/kamon/util/GlobPathFilter.java b/kamon-core/src/main/java/kamon/util/GlobPathFilter.java deleted file mode 100644 index ac5d08a6..00000000 --- a/kamon-core/src/main/java/kamon/util/GlobPathFilter.java +++ /dev/null @@ -1,110 +0,0 @@ -/* - * ========================================================================================= - * Copyright 2013-2014 the kamon project <http://kamon.io/> - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file - * except in compliance with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software distributed under the - * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, - * either express or implied. See the License for the specific language governing permissions - * and limitations under the License. - * ========================================================================================= - */ - -package kamon.util; - -import java.util.regex.Matcher; -import java.util.regex.Pattern; - -/** - * Default implementation of PathFilter. Uses glob based includes and excludes to determine whether to export. - * - * @author John E. Bailey - * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a> - */ -public final class GlobPathFilter implements PathFilter { - private static final Pattern GLOB_PATTERN = Pattern.compile("(\\*\\*?)|(\\?)|(\\\\.)|(/+)|([^*?]+)"); - - private final String glob; - private final Pattern pattern; - - /** - * Construct a new instance. - * - * @param glob the path glob to match - */ - public GlobPathFilter(final String glob) { - pattern = getGlobPattern(glob); - this.glob = glob; - } - - /** - * Determine whether a path should be accepted. - * - * @param path the path to check - * @return true if the path should be accepted, false if not - */ - public boolean accept(final String path) { - return pattern.matcher(path).matches(); - } - - /** - * Get a regular expression pattern which accept any path names which match the given glob. The glob patterns - * function similarly to {@code ant} file patterns. Valid metacharacters in the glob pattern include: - * <ul> - * <li><code>"\"</code> - escape the next character (treat it literally, even if it is itself a recognized metacharacter)</li> - * <li><code>"?"</code> - match any non-slash character</li> - * <li><code>"*"</code> - match zero or more non-slash characters</li> - * <li><code>"**"</code> - match zero or more characters, including slashes</li> - * <li><code>"/"</code> - match one or more slash characters. Consecutive {@code /} characters are collapsed down into one.</li> - * </ul> - * In addition, any glob pattern matches all subdirectories thereof. A glob pattern ending in {@code /} is equivalent - * to a glob pattern ending in <code>/**</code> in that the named directory is not itself included in the glob. - * <p/> - * <b>See also:</b> <a href="http://ant.apache.org/manual/dirtasks.html#patterns">"Patterns" in the Ant Manual</a> - * - * @param glob the glob to match - * - * @return the pattern - */ - private static Pattern getGlobPattern(final String glob) { - StringBuilder patternBuilder = new StringBuilder(); - final Matcher m = GLOB_PATTERN.matcher(glob); - boolean lastWasSlash = false; - while (m.find()) { - lastWasSlash = false; - String grp; - if ((grp = m.group(1)) != null) { - // match a * or ** - if (grp.length() == 2) { - // it's a *workers are able to process multiple metrics* - patternBuilder.append(".*"); - } else { - // it's a * - patternBuilder.append("[^/]*"); - } - } else if ((grp = m.group(2)) != null) { - // match a '?' glob pattern; any non-slash character - patternBuilder.append("[^/]"); - } else if ((grp = m.group(3)) != null) { - // backslash-escaped value - patternBuilder.append(Pattern.quote(m.group().substring(1))); - } else if ((grp = m.group(4)) != null) { - // match any number of / chars - patternBuilder.append("/+"); - lastWasSlash = true; - } else { - // some other string - patternBuilder.append(Pattern.quote(m.group())); - } - } - if (lastWasSlash) { - // ends in /, append ** - patternBuilder.append(".*"); - } - return Pattern.compile(patternBuilder.toString()); - } -} |