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      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.iface.Annotation;
     36 import org.jf.dexlib2.writer.AnnotationSection;
     37 import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderEncodedValue;
     38 
     39 import javax.annotation.Nonnull;
     40 import java.util.Collection;
     41 import java.util.Map.Entry;
     42 import java.util.concurrent.ConcurrentMap;
     43 
     44 class BuilderAnnotationPool extends BaseBuilderPool implements AnnotationSection<BuilderStringReference,
     45         BuilderTypeReference, BuilderAnnotation, BuilderAnnotationElement, BuilderEncodedValue> {
     46     @Nonnull private final ConcurrentMap<Annotation, BuilderAnnotation> internedItems =
     47             Maps.newConcurrentMap();
     48 
     49     public BuilderAnnotationPool(@Nonnull DexBuilder dexBuilder) {
     50         super(dexBuilder);
     51     }
     52 
     53     @Nonnull public BuilderAnnotation internAnnotation(@Nonnull Annotation annotation) {
     54         BuilderAnnotation ret = internedItems.get(annotation);
     55         if (ret != null) {
     56             return ret;
     57         }
     58 
     59         BuilderAnnotation dexBuilderAnnotation = new BuilderAnnotation(
     60                 annotation.getVisibility(),
     61                 dexBuilder.typeSection.internType(annotation.getType()),
     62                 dexBuilder.internAnnotationElements(annotation.getElements()));
     63         ret = internedItems.putIfAbsent(dexBuilderAnnotation, dexBuilderAnnotation);
     64         return ret==null?dexBuilderAnnotation:ret;
     65     }
     66 
     67     @Override public int getVisibility(@Nonnull BuilderAnnotation key) {
     68         return key.visibility;
     69     }
     70 
     71     @Nonnull @Override public BuilderTypeReference getType(@Nonnull BuilderAnnotation key) {
     72         return key.type;
     73     }
     74 
     75     @Nonnull @Override
     76     public Collection<? extends BuilderAnnotationElement> getElements(@Nonnull BuilderAnnotation key) {
     77         return key.elements;
     78     }
     79 
     80     @Nonnull @Override
     81     public BuilderStringReference getElementName(@Nonnull BuilderAnnotationElement element) {
     82         return element.name;
     83     }
     84 
     85     @Nonnull @Override
     86     public BuilderEncodedValue getElementValue(@Nonnull BuilderAnnotationElement element) {
     87         return element.value;
     88     }
     89 
     90     @Override public int getItemOffset(@Nonnull BuilderAnnotation key) {
     91         return key.offset;
     92     }
     93 
     94     @Nonnull @Override public Collection<? extends Entry<? extends BuilderAnnotation, Integer>> getItems() {
     95         return new BuilderMapEntryCollection<BuilderAnnotation>(internedItems.values()) {
     96             @Override protected int getValue(@Nonnull BuilderAnnotation key) {
     97                 return key.offset;
     98             }
     99 
    100             @Override protected int setValue(@Nonnull BuilderAnnotation key, int value) {
    101                 int prev = key.offset;
    102                 key.offset = value;
    103                 return prev;
    104             }
    105         };
    106     }
    107 }
    108