| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.util; |
| |
| import java.util.AbstractSet; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| import java.util.regex.Pattern; |
| |
| /** |
| * A Set of Regular expressions strings. |
| * <p> |
| * Provides the efficient {@link #matches(String)} method to check for a match against all the combined Regex's |
| */ |
| public class RegexSet extends AbstractSet<String> implements Predicate<String> |
| { |
| private final Set<String> _patterns=new HashSet<String>(); |
| private final Set<String> _unmodifiable=Collections.unmodifiableSet(_patterns); |
| private Pattern _pattern; |
| |
| @Override |
| public Iterator<String> iterator() |
| { |
| return _unmodifiable.iterator(); |
| } |
| |
| @Override |
| public int size() |
| { |
| return _patterns.size(); |
| } |
| |
| @Override |
| public boolean add(String pattern) |
| { |
| boolean added = _patterns.add(pattern); |
| if (added) |
| updatePattern(); |
| return added; |
| } |
| |
| @Override |
| public boolean remove(Object pattern) |
| { |
| boolean removed = _patterns.remove(pattern); |
| |
| if (removed) |
| updatePattern(); |
| return removed; |
| } |
| |
| @Override |
| public boolean isEmpty() |
| { |
| return _patterns.isEmpty(); |
| } |
| |
| @Override |
| public void clear() |
| { |
| _patterns.clear(); |
| _pattern=null; |
| } |
| |
| private void updatePattern() |
| { |
| StringBuilder builder = new StringBuilder(); |
| builder.append("^("); |
| for (String pattern: _patterns) |
| { |
| if (builder.length()>2) |
| builder.append('|'); |
| builder.append('('); |
| builder.append(pattern); |
| builder.append(')'); |
| } |
| builder.append(")$"); |
| _pattern = Pattern.compile(builder.toString()); |
| } |
| |
| @Override |
| public boolean test(String s) |
| { |
| return _pattern!=null && _pattern.matcher(s).matches(); |
| } |
| |
| public boolean matches(String s) |
| { |
| return _pattern!=null && _pattern.matcher(s).matches(); |
| } |
| } |