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 //
 //  ========================================================================
 //  Copyright (c) 1995-2013 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;
/* ------------------------------------------------------------ */
UTF-8 StringBuilder. This class wraps a standard java.lang.StringBuilder and provides methods to append UTF-8 encoded bytes, that are converted into characters. This class is stateful and up to 4 calls to Utf8Appendable.append(byte) may be needed before state a character is appended to the string buffer. The UTF-8 decoding is done by this class and no additional buffers or Readers are used. The UTF-8 code was inspired by http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
public class Utf8StringBuilder extends Utf8Appendable
    final StringBuilder _buffer;
    public Utf8StringBuilder()
    {
        super(new StringBuilder());
    }
    public Utf8StringBuilder(int capacity)
    {
        super(new StringBuilder(capacity));
    }
    @Override
    public int length()
    {
        return .length();
    }
    @Override
    public void reset()
    {
        super.reset();
        .setLength(0);
    }
    {
        checkState();
        return ;
    }
    @Override
    public String toString()
    {
        checkState();
        return .toString();
    }
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