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annotate src/org/eclipse/jetty/util/Utf8StringBuilder.java @ 928:23a57aad34c0
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 09 Oct 2016 18:54:32 -0600 |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.util; |
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20 |
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21 |
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22 /* ------------------------------------------------------------ */ |
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23 /** UTF-8 StringBuilder. |
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24 * |
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25 * This class wraps a standard {@link java.lang.StringBuilder} and provides methods to append |
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26 * UTF-8 encoded bytes, that are converted into characters. |
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27 * |
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28 * This class is stateful and up to 4 calls to {@link #append(byte)} may be needed before |
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29 * state a character is appended to the string buffer. |
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30 * |
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31 * The UTF-8 decoding is done by this class and no additional buffers or Readers are used. |
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32 * The UTF-8 code was inspired by http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ |
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33 * |
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34 */ |
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35 public class Utf8StringBuilder extends Utf8Appendable |
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36 { |
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37 final StringBuilder _buffer; |
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38 |
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39 public Utf8StringBuilder() |
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40 { |
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41 super(new StringBuilder()); |
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42 _buffer=(StringBuilder)_appendable; |
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43 } |
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44 |
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45 public Utf8StringBuilder(int capacity) |
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46 { |
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47 super(new StringBuilder(capacity)); |
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48 _buffer=(StringBuilder)_appendable; |
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49 } |
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50 |
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51 @Override |
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52 public int length() |
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53 { |
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54 return _buffer.length(); |
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55 } |
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56 |
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57 @Override |
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58 public void reset() |
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59 { |
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60 super.reset(); |
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61 _buffer.setLength(0); |
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62 } |
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63 |
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64 public StringBuilder getStringBuilder() |
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65 { |
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66 checkState(); |
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67 return _buffer; |
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68 } |
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69 |
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70 @Override |
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71 public String toString() |
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72 { |
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73 checkState(); |
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74 return _buffer.toString(); |
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75 } |
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76 |
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77 |
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78 } |