org.eclipse.jetty.util.RegexSet Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of aem-sdk-api Show documentation

The Adobe Experience Manager SDK

There is a newer version: 2024.11.18751.20241128T090041Z-241100

// 
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// 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.function.Predicate;
import java.util.regex.Pattern;

/**
 *  A Set of Regular expressions strings.
 *  
 *  Provides the efficient {@link #matches(String)} method to check for a match against all the combined Regex's
 *
 * @deprecated The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
 */
@Deprecated(since = "2021-05-27")
public class RegexSet extends AbstractSet implements Predicate {

    private final Set _patterns = new HashSet();

    private final Set _unmodifiable = Collections.unmodifiableSet(_patterns);

    private Pattern _pattern;

    @Override
    public Iterator 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();
    }
}