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      1 /*
      2  * Copyright 2012, 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
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     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
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     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
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     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 package org.jf.dexlib2.immutable;
     33 
     34 import com.google.common.collect.ImmutableSet;
     35 import org.jf.dexlib2.base.BaseAnnotation;
     36 import org.jf.dexlib2.iface.Annotation;
     37 import org.jf.dexlib2.iface.AnnotationElement;
     38 import org.jf.util.ImmutableConverter;
     39 import org.jf.util.ImmutableUtils;
     40 
     41 import javax.annotation.Nonnull;
     42 import javax.annotation.Nullable;
     43 import java.util.Collection;
     44 
     45 public class ImmutableAnnotation extends BaseAnnotation {
     46     protected final int visibility;
     47     @Nonnull protected final String type;
     48     @Nonnull protected final ImmutableSet<? extends ImmutableAnnotationElement> elements;
     49 
     50     public ImmutableAnnotation(int visibility,
     51                                @Nonnull String type,
     52                                @Nullable Collection<? extends AnnotationElement> elements) {
     53         this.visibility = visibility;
     54         this.type = type;
     55         this.elements = ImmutableAnnotationElement.immutableSetOf(elements);
     56     }
     57 
     58     public ImmutableAnnotation(int visibility,
     59                                @Nonnull String type,
     60                                @Nullable ImmutableSet<? extends ImmutableAnnotationElement> elements) {
     61         this.visibility = visibility;
     62         this.type = type;
     63         this.elements = ImmutableUtils.nullToEmptySet(elements);
     64     }
     65 
     66     public static ImmutableAnnotation of(Annotation annotation) {
     67         if (annotation instanceof  ImmutableAnnotation) {
     68             return (ImmutableAnnotation)annotation;
     69         }
     70         return new ImmutableAnnotation(
     71                 annotation.getVisibility(),
     72                 annotation.getType(),
     73                 annotation.getElements());
     74     }
     75 
     76     @Override public int getVisibility() { return visibility; }
     77     @Nonnull @Override public String getType() { return type; }
     78     @Nonnull @Override public ImmutableSet<? extends ImmutableAnnotationElement> getElements() { return elements; }
     79 
     80     @Nonnull
     81     public static ImmutableSet<ImmutableAnnotation> immutableSetOf(@Nullable Iterable<? extends Annotation> list) {
     82         return CONVERTER.toSet(list);
     83     }
     84 
     85     private static final ImmutableConverter<ImmutableAnnotation, Annotation> CONVERTER =
     86             new ImmutableConverter<ImmutableAnnotation, Annotation>() {
     87                 @Override
     88                 protected boolean isImmutable(@Nonnull Annotation item) {
     89                     return item instanceof ImmutableAnnotation;
     90                 }
     91 
     92                 @Nonnull
     93                 @Override
     94                 protected ImmutableAnnotation makeImmutable(@Nonnull Annotation item) {
     95                     return ImmutableAnnotation.of(item);
     96                 }
     97             };
     98 }
     99