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,
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
32package org.jf.dexlib2.immutable.instruction;
33
34import com.google.common.collect.ImmutableList;
35import org.jf.dexlib2.iface.instruction.SwitchElement;
36import org.jf.util.ImmutableConverter;
37
38import javax.annotation.Nonnull;
39import javax.annotation.Nullable;
40import java.util.List;
41
42public class ImmutableSwitchElement implements SwitchElement {
43    protected final int key;
44    protected final int offset;
45
46    public ImmutableSwitchElement(int key,
47                                  int offset) {
48        this.key = key;
49        this.offset = offset;
50    }
51
52    @Nonnull
53    public static ImmutableSwitchElement of(SwitchElement switchElement) {
54        if (switchElement instanceof  ImmutableSwitchElement) {
55            return (ImmutableSwitchElement)switchElement;
56        }
57        return new ImmutableSwitchElement(
58                switchElement.getKey(),
59                switchElement.getOffset());
60    }
61
62    @Override public int getKey() { return key; }
63    @Override public int getOffset() { return offset; }
64
65    @Nonnull
66    public static ImmutableList<ImmutableSwitchElement> immutableListOf(@Nullable List<? extends SwitchElement> list) {
67        return CONVERTER.toList(list);
68    }
69
70    private static final ImmutableConverter<ImmutableSwitchElement, SwitchElement> CONVERTER =
71            new ImmutableConverter<ImmutableSwitchElement, SwitchElement>() {
72                @Override
73                protected boolean isImmutable(@Nonnull SwitchElement item) {
74                    return item instanceof ImmutableSwitchElement;
75                }
76
77                @Nonnull
78                @Override
79                protected ImmutableSwitchElement makeImmutable(@Nonnull SwitchElement item) {
80                    return ImmutableSwitchElement.of(item);
81                }
82            };
83}
84