ImmutableAnnotation.java revision 3019737ed32e734cda3e51a7b6b31f6477e8bf95 
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
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,
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.immutable;
33
34import com.google.common.base.Objects;
35import com.google.common.collect.ImmutableList;
36import org.jf.dexlib2.iface.Annotation;
37import org.jf.dexlib2.iface.AnnotationElement;
38import org.jf.util.ImmutableListConverter;
39
40import javax.annotation.Nonnull;
41import javax.annotation.Nullable;
42import java.util.List;
43
44public class ImmutableAnnotation implements Annotation {
45    public final int visibility;
46    @Nonnull public final String type;
47    @Nonnull public final ImmutableList<? extends ImmutableAnnotationElement> elements;
48
49    public ImmutableAnnotation(int visibility,
50                               @Nonnull String type,
51                               @Nullable List<? extends AnnotationElement> elements) {
52        this.visibility = visibility;
53        this.type = type;
54        this.elements = ImmutableAnnotationElement.immutableListOf(elements);
55    }
56
57    public ImmutableAnnotation(int visibility,
58                               @Nonnull String type,
59                               @Nullable ImmutableList<? extends ImmutableAnnotationElement> elements) {
60        this.visibility = visibility;
61        this.type = type;
62        this.elements = Objects.firstNonNull(elements, ImmutableList.<ImmutableAnnotationElement>of());
63    }
64
65    public static ImmutableAnnotation of(Annotation annotation) {
66        if (annotation instanceof  ImmutableAnnotation) {
67            return (ImmutableAnnotation)annotation;
68        }
69        return new ImmutableAnnotation(
70                annotation.getVisibility(),
71                annotation.getType(),
72                annotation.getElements());
73    }
74
75    @Override public int getVisibility() { return visibility; }
76    @Nonnull @Override public String getType() { return type; }
77    @Nonnull @Override public ImmutableList<? extends ImmutableAnnotationElement> getElements() { return elements; }
78
79    @Nonnull
80    public static ImmutableList<ImmutableAnnotation> immutableListOf(List<? extends Annotation> list) {
81        return CONVERTER.convert(list);
82    }
83
84    private static final ImmutableListConverter<ImmutableAnnotation, Annotation> CONVERTER =
85            new ImmutableListConverter<ImmutableAnnotation, Annotation>() {
86                @Override
87                protected boolean isImmutable(Annotation item) {
88                    return item instanceof ImmutableAnnotation;
89                }
90
91                @Override
92                protected ImmutableAnnotation makeImmutable(Annotation item) {
93                    return ImmutableAnnotation.of(item);
94                }
95            };
96}
97