1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // https://developers.google.com/protocol-buffers/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 package com.google.protobuf; 32 33 import com.google.protobuf.Internal.BooleanList; 34 import com.google.protobuf.Internal.DoubleList; 35 import com.google.protobuf.Internal.FloatList; 36 import com.google.protobuf.Internal.IntList; 37 import com.google.protobuf.Internal.LongList; 38 import com.google.protobuf.Internal.ProtobufList; 39 40 /** Utility class for construction of lists that extend {@link ProtobufList}. */ 41 @ExperimentalApi 42 final class ProtobufLists { ProtobufLists()43 private ProtobufLists() {} 44 emptyProtobufList()45 public static <E> ProtobufList<E> emptyProtobufList() { 46 return ProtobufArrayList.emptyList(); 47 } 48 mutableCopy(ProtobufList<E> list)49 public static <E> ProtobufList<E> mutableCopy(ProtobufList<E> list) { 50 int size = list.size(); 51 return list.mutableCopyWithCapacity( 52 size == 0 ? AbstractProtobufList.DEFAULT_CAPACITY : size * 2); 53 } 54 emptyBooleanList()55 public static BooleanList emptyBooleanList() { 56 return BooleanArrayList.emptyList(); 57 } 58 newBooleanList()59 public static BooleanList newBooleanList() { 60 return new BooleanArrayList(); 61 } 62 emptyIntList()63 public static IntList emptyIntList() { 64 return IntArrayList.emptyList(); 65 } 66 newIntList()67 public static IntList newIntList() { 68 return new IntArrayList(); 69 } 70 emptyLongList()71 public static LongList emptyLongList() { 72 return LongArrayList.emptyList(); 73 } 74 newLongList()75 public static LongList newLongList() { 76 return new LongArrayList(); 77 } 78 emptyFloatList()79 public static FloatList emptyFloatList() { 80 return FloatArrayList.emptyList(); 81 } 82 newFloatList()83 public static FloatList newFloatList() { 84 return new FloatArrayList(); 85 } 86 emptyDoubleList()87 public static DoubleList emptyDoubleList() { 88 return DoubleArrayList.emptyList(); 89 } 90 newDoubleList()91 public static DoubleList newDoubleList() { 92 return new DoubleArrayList(); 93 } 94 } 95