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 METHOD_PROTO = 4;
43    public static final int NONE = 5;
44
45    public static String toString(int referenceType) {
46        switch (referenceType) {
47            case STRING:
48                return "string";
49            case TYPE:
50                return "type";
51            case FIELD:
52                return "field";
53            case METHOD:
54                return "method";
55            case METHOD_PROTO:
56                return "method_proto";
57            default:
58                throw new InvalidReferenceTypeException(referenceType);
59        }
60    }
61
62    public static int getReferenceType(Reference reference) {
63        if (reference instanceof StringReference) {
64            return STRING;
65        } else if (reference instanceof TypeReference) {
66            return TYPE;
67        } else if (reference instanceof FieldReference) {
68            return FIELD;
69        } else if (reference instanceof MethodReference) {
70            return METHOD;
71        } else if (reference instanceof MethodProtoReference) {
72            return METHOD_PROTO;
73        } else {
74            throw new IllegalStateException("Invalid reference");
75        }
76    }
77
78    /**
79     * Validate a specific reference type. Note that the NONE placeholder is specifically not considered valid here.
80     *
81     * @throws InvalidReferenceTypeException
82     */
83    public static void validateReferenceType(int referenceType) {
84        if (referenceType < 0 || referenceType > 4) {
85            throw new InvalidReferenceTypeException(referenceType);
86        }
87    }
88
89    public static class InvalidReferenceTypeException extends ExceptionWithContext {
90        private final int referenceType;
91
92        public InvalidReferenceTypeException(int referenceType) {
93            super("Invalid reference type: %d", referenceType);
94            this.referenceType = referenceType;
95        }
96
97        public InvalidReferenceTypeException(int referenceType, String message, Object... formatArgs) {
98            super(message, formatArgs);
99            this.referenceType = referenceType;
100        }
101
102        public int getReferenceType() {
103            return referenceType;
104        }
105    }
106
107    private ReferenceType() {}
108}