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;
33
34import org.jf.dexlib2.iface.reference.*;
35import org.jf.util.ExceptionWithContext;
36
37public final class ReferenceType {
38    public static final int STRING = 0;
39    public static final int TYPE = 1;
40    public static final int FIELD = 2;
41    public static final int METHOD = 3;
42    public static final int NONE = 4;
43
44    public static String toString(int referenceType) {
45        switch (referenceType) {
46            case STRING:
47                return "string";
48            case TYPE:
49                return "type";
50            case FIELD:
51                return "field";
52            case METHOD:
53                return "method";
54            default:
55                throw new InvalidReferenceTypeException(referenceType);
56        }
57    }
58
59    public static int getReferenceType(Reference reference) {
60        if (reference instanceof StringReference) {
61            return STRING;
62        } else if (reference instanceof TypeReference) {
63            return TYPE;
64        } else if (reference instanceof FieldReference) {
65            return FIELD;
66        } else if (reference instanceof MethodReference) {
67            return METHOD;
68        } else {
69            throw new IllegalStateException("Invalid reference");
70        }
71    }
72
73    /**
74     * Validate a specific reference type. Note that the NONE placeholder is specifically not considered valid here.
75     *
76     * @throws InvalidReferenceTypeException
77     */
78    public static void validateReferenceType(int referenceType) {
79        if (referenceType < 0 || referenceType > 3) {
80            throw new InvalidReferenceTypeException(referenceType);
81        }
82    }
83
84    public static class InvalidReferenceTypeException extends ExceptionWithContext {
85        private final int referenceType;
86
87        public InvalidReferenceTypeException(int referenceType) {
88            super("Invalid reference type: %d", referenceType);
89            this.referenceType = referenceType;
90        }
91
92        public InvalidReferenceTypeException(int referenceType, String message, Object... formatArgs) {
93            super(message, formatArgs);
94            this.referenceType = referenceType;
95        }
96
97        public int getReferenceType() {
98            return referenceType;
99        }
100    }
101
102    private ReferenceType() {}
103}