[15014] | 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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