1 | // Protocol Buffers - Google's data interchange format |
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2 | // Copyright 2008 Google Inc. All rights reserved. |
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3 | // http://code.google.com/p/protobuf/ |
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4 | // |
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5 | // Redistribution and use in source and binary forms, with or without |
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6 | // modification, are permitted provided that the following conditions are |
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7 | // met: |
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8 | // |
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9 | // * Redistributions of source code must retain the above copyright |
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10 | // notice, this list of conditions and the following disclaimer. |
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11 | // * Redistributions in binary form must reproduce the above |
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12 | // copyright notice, this list of conditions and the following disclaimer |
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13 | // in the documentation and/or other materials provided with the |
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14 | // distribution. |
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15 | // * Neither the name of Google Inc. nor the names of its |
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16 | // contributors may be used to endorse or promote products derived from |
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17 | // this software without specific prior written permission. |
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18 | // |
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19 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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20 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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21 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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22 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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23 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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24 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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25 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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26 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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27 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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28 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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29 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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30 | |
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31 | package com.google.protobuf; |
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32 | |
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33 | import java.util.AbstractList; |
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34 | import java.util.RandomAccess; |
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35 | import java.util.ListIterator; |
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36 | import java.util.Iterator; |
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37 | |
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38 | /** |
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39 | * An implementation of {@link LazyStringList} that wraps another |
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40 | * {@link LazyStringList} such that it cannot be modified via the wrapper. |
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41 | * |
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42 | * @author jonp@google.com (Jon Perlow) |
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43 | */ |
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44 | public class UnmodifiableLazyStringList extends AbstractList<String> |
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45 | implements LazyStringList, RandomAccess { |
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46 | |
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47 | private final LazyStringList list; |
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48 | |
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49 | public UnmodifiableLazyStringList(LazyStringList list) { |
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50 | this.list = list; |
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51 | } |
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52 | |
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53 | @Override |
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54 | public String get(int index) { |
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55 | return list.get(index); |
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56 | } |
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57 | |
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58 | @Override |
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59 | public int size() { |
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60 | return list.size(); |
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61 | } |
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62 | |
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63 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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64 | public ByteString getByteString(int index) { |
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65 | return list.getByteString(index); |
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66 | } |
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67 | |
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68 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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69 | public void add(ByteString element) { |
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70 | throw new UnsupportedOperationException(); |
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71 | } |
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72 | |
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73 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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74 | public ListIterator<String> listIterator(final int index) { |
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75 | return new ListIterator<String>() { |
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76 | ListIterator<String> iter = list.listIterator(index); |
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77 | |
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78 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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79 | public boolean hasNext() { |
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80 | return iter.hasNext(); |
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81 | } |
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82 | |
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83 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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84 | public String next() { |
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85 | return iter.next(); |
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86 | } |
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87 | |
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88 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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89 | public boolean hasPrevious() { |
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90 | return iter.hasPrevious(); |
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91 | } |
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92 | |
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93 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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94 | public String previous() { |
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95 | return iter.previous(); |
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96 | } |
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97 | |
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98 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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99 | public int nextIndex() { |
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100 | return iter.nextIndex(); |
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101 | } |
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102 | |
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103 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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104 | public int previousIndex() { |
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105 | return iter.previousIndex(); |
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106 | } |
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107 | |
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108 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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109 | public void remove() { |
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110 | throw new UnsupportedOperationException(); |
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111 | } |
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112 | |
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113 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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114 | public void set(String o) { |
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115 | throw new UnsupportedOperationException(); |
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116 | } |
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117 | |
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118 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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119 | public void add(String o) { |
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120 | throw new UnsupportedOperationException(); |
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121 | } |
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122 | }; |
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123 | } |
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124 | |
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125 | @Override |
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126 | public Iterator<String> iterator() { |
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127 | return new Iterator<String>() { |
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128 | Iterator<String> iter = list.iterator(); |
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129 | |
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130 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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131 | public boolean hasNext() { |
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132 | return iter.hasNext(); |
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133 | } |
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134 | |
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135 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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136 | public String next() { |
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137 | return iter.next(); |
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138 | } |
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139 | |
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140 | //@Override (Java 1.6 override semantics, but we must support 1.5) |
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141 | public void remove() { |
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142 | throw new UnsupportedOperationException(); |
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143 | } |
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144 | }; |
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145 | } |
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146 | } |
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