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Utility classes for Jetty

There is a newer version: 12.0.13

//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.util;

import java.util.HashSet;

public class AsciiLowerCaseSet extends HashSet
{
    @Override
    public boolean add(String s)
    {
        return super.add(s == null ? null : StringUtil.asciiToLowerCase(s));
    }

    @Override
    public boolean contains(Object o)
    {
        if (o instanceof String)
            return super.contains(StringUtil.asciiToLowerCase((String)o));
        return super.contains(o);
    }
}