1 /* 2 * Copyright 2013, Google Inc. 3 * All rights reserved. 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 32 package org.jf.dexlib2.writer.builder; 33 34 import com.google.common.collect.Maps; 35 import org.jf.dexlib2.writer.DexWriter; 36 import org.jf.dexlib2.writer.TypeSection; 37 38 import javax.annotation.Nonnull; 39 import javax.annotation.Nullable; 40 import java.util.Collection; 41 import java.util.Map.Entry; 42 import java.util.concurrent.ConcurrentMap; 43 44 class BuilderTypePool extends BaseBuilderPool 45 implements TypeSection<BuilderStringReference, BuilderTypeReference, BuilderTypeReference> { 46 @Nonnull private final ConcurrentMap<String, BuilderTypeReference> internedItems = Maps.newConcurrentMap(); 47 48 public BuilderTypePool(@Nonnull DexBuilder dexBuilder) { 49 super(dexBuilder); 50 } 51 52 @Nonnull public BuilderTypeReference internType(@Nonnull String type) { 53 BuilderTypeReference ret = internedItems.get(type); 54 if (ret != null) { 55 return ret; 56 } 57 BuilderStringReference stringRef = dexBuilder.stringSection.internString(type); 58 BuilderTypeReference typeReference = new BuilderTypeReference(stringRef); 59 ret = internedItems.putIfAbsent(type, typeReference); 60 return ret==null?typeReference:ret; 61 } 62 63 @Nullable public BuilderTypeReference internNullableType(@Nullable String type) { 64 if (type == null) { 65 return null; 66 } 67 return internType(type); 68 } 69 70 @Nonnull @Override public BuilderStringReference getString(@Nonnull BuilderTypeReference key) { 71 return key.stringReference; 72 } 73 74 @Override public int getNullableItemIndex(@Nullable BuilderTypeReference key) { 75 return key==null?DexWriter.NO_INDEX:key.index; 76 } 77 78 @Override public int getItemIndex(@Nonnull BuilderTypeReference key) { 79 return key.getIndex(); 80 } 81 82 @Nonnull @Override public Collection<? extends Entry<? extends BuilderTypeReference, Integer>> getItems() { 83 return new BuilderMapEntryCollection<BuilderTypeReference>(internedItems.values()) { 84 @Override protected int getValue(@Nonnull BuilderTypeReference key) { 85 return key.index; 86 } 87 88 @Override protected int setValue(@Nonnull BuilderTypeReference key, int value) { 89 int prev = key.index; 90 key.index = value; 91 return prev; 92 } 93 }; 94 } 95 96 @Override public int getItemCount() { 97 return internedItems.size(); 98 } 99 } 100
