1 /* 2 * Copyright 2013, Google LLC 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google LLC nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 package com.android.tools.smali.dexlib2.writer.builder; 32 33 import com.android.tools.smali.dexlib2.writer.DexWriter; 34 import com.android.tools.smali.dexlib2.writer.TypeSection; 35 36 import javax.annotation.Nonnull; 37 import javax.annotation.Nullable; 38 import java.util.Collection; 39 import java.util.Map.Entry; 40 import java.util.concurrent.ConcurrentHashMap; 41 import java.util.concurrent.ConcurrentMap; 42 43 class BuilderTypePool extends BaseBuilderPool 44 implements TypeSection<BuilderStringReference, BuilderTypeReference, BuilderTypeReference> { 45 @Nonnull private final ConcurrentMap<String, BuilderTypeReference> internedItems = new ConcurrentHashMap<>(); 46 BuilderTypePool(@onnull DexBuilder dexBuilder)47 public BuilderTypePool(@Nonnull DexBuilder dexBuilder) { 48 super(dexBuilder); 49 } 50 internType(@onnull String type)51 @Nonnull public BuilderTypeReference internType(@Nonnull String type) { 52 BuilderTypeReference ret = internedItems.get(type); 53 if (ret != null) { 54 return ret; 55 } 56 BuilderStringReference stringRef = dexBuilder.stringSection.internString(type); 57 BuilderTypeReference typeReference = new BuilderTypeReference(stringRef); 58 ret = internedItems.putIfAbsent(type, typeReference); 59 return ret==null?typeReference:ret; 60 } 61 internNullableType(@ullable String type)62 @Nullable public BuilderTypeReference internNullableType(@Nullable String type) { 63 if (type == null) { 64 return null; 65 } 66 return internType(type); 67 } 68 getString(@onnull BuilderTypeReference key)69 @Nonnull @Override public BuilderStringReference getString(@Nonnull BuilderTypeReference key) { 70 return key.stringReference; 71 } 72 getNullableItemIndex(@ullable BuilderTypeReference key)73 @Override public int getNullableItemIndex(@Nullable BuilderTypeReference key) { 74 return key==null? DexWriter.NO_INDEX:key.index; 75 } 76 getItemIndex(@onnull BuilderTypeReference key)77 @Override public int getItemIndex(@Nonnull BuilderTypeReference key) { 78 return key.getIndex(); 79 } 80 getItems()81 @Nonnull @Override public Collection<? extends Entry<? extends BuilderTypeReference, Integer>> getItems() { 82 return new BuilderMapEntryCollection<BuilderTypeReference>(internedItems.values()) { 83 @Override protected int getValue(@Nonnull BuilderTypeReference key) { 84 return key.index; 85 } 86 87 @Override protected int setValue(@Nonnull BuilderTypeReference key, int value) { 88 int prev = key.index; 89 key.index = value; 90 return prev; 91 } 92 }; 93 } 94 95 @Override public int getItemCount() { 96 return internedItems.size(); 97 } 98 } 99