UnknownClassProto.java revision 39e4d4487e20041700f036a58a4dd7fb50e954bf 
1/*
2 * Copyright 2013, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
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10 * notice, this list of conditions and the following disclaimer.
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13 * in the documentation and/or other materials provided with the
14 * distribution.
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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
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22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30 */
31
32package org.jf.dexlib2.analysis;
33
34import javax.annotation.Nonnull;
35import javax.annotation.Nullable;
36
37public class UnknownClassProto implements TypeProto {
38    @Nonnull protected final ClassPath classPath;
39
40    public UnknownClassProto(@Nonnull ClassPath classPath) {
41        this.classPath = classPath;
42    }
43
44    @Override public String toString() { return "Ujava/lang/Object;"; }
45    @Nonnull @Override public ClassPath getClassPath() { return classPath; }
46    @Nullable @Override public String getSuperclass() { return null; }
47    @Override public boolean isInterface() { return false; }
48    @Override public boolean implementsInterface(@Nonnull String iface) { return false; }
49
50    @Nonnull @Override public TypeProto getCommonSuperclass(@Nonnull TypeProto other) {
51        if (other.getType().equals("Ljava/lang/Object;")) {
52            return other;
53        }
54        if (other instanceof ArrayProto) {
55            // if it's an array class, it's safe to assume this unknown class isn't related, and so
56            // java.lang.Object is the only possible superclass
57            return classPath.getClass("Ljava/lang/Object;");
58        }
59        return this;
60    }
61
62    @Nonnull @Override public String getType() {
63        // use the otherwise used U prefix for an unknown/unresolvable class
64        return "Ujava/lang/Object;";
65    }
66}
67