ImmutableExceptionHandler.java revision ddf20219422e40a1e60268d8049093602d7bacf8 
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
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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.collect.ImmutableList;
35import org.jf.dexlib2.iface.ExceptionHandler;
36import org.jf.util.ImmutableListConverter;
37
38import javax.annotation.Nonnull;
39import javax.annotation.Nullable;
40
41public class ImmutableExceptionHandler implements ExceptionHandler {
42    @Nullable public final String exceptionType;
43    public final int handlerCodeOffset;
44
45    public ImmutableExceptionHandler(@Nullable String exceptionType,
46                                     int handlerCodeOffset) {
47        this.exceptionType = exceptionType;
48        this.handlerCodeOffset = handlerCodeOffset;
49    }
50
51    public static ImmutableExceptionHandler of(ExceptionHandler exceptionHandler) {
52        if (exceptionHandler instanceof ImmutableExceptionHandler) {
53            return (ImmutableExceptionHandler)exceptionHandler;
54        }
55        return new ImmutableExceptionHandler(
56                exceptionHandler.getExceptionType(),
57                exceptionHandler.getHandlerCodeOffset());
58    }
59
60    @Nullable @Override public String getExceptionType() { return exceptionType; }
61    @Override public int getHandlerCodeOffset() { return handlerCodeOffset; }
62
63    @Nonnull
64    public static ImmutableList<ImmutableExceptionHandler> immutableListOf(
65            @Nullable Iterable<? extends ExceptionHandler> list) {
66        return CONVERTER.convert(list);
67    }
68
69    private static final ImmutableListConverter<ImmutableExceptionHandler, ExceptionHandler> CONVERTER =
70            new ImmutableListConverter<ImmutableExceptionHandler, ExceptionHandler>() {
71                @Override
72                protected boolean isImmutable(@Nonnull ExceptionHandler item) {
73                    return item instanceof ImmutableExceptionHandler;
74                }
75
76                @Nonnull
77                @Override
78                protected ImmutableExceptionHandler makeImmutable(@Nonnull ExceptionHandler item) {
79                    return ImmutableExceptionHandler.of(item);
80                }
81            };
82}
83