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.value;
33
34import com.google.common.base.Preconditions;
35import com.google.common.collect.ImmutableList;
36import org.jf.dexlib2.ValueType;
37import org.jf.dexlib2.iface.value.*;
38import org.jf.util.ExceptionWithContext;
39import org.jf.util.ImmutableConverter;
40
41import javax.annotation.Nonnull;
42import javax.annotation.Nullable;
43
44public class ImmutableEncodedValueFactory {
45    @Nonnull
46    public static ImmutableEncodedValue of(@Nonnull EncodedValue encodedValue) {
47        switch (encodedValue.getValueType()) {
48            case ValueType.BYTE:
49                return ImmutableByteEncodedValue.of((ByteEncodedValue)encodedValue);
50            case ValueType.SHORT:
51                return ImmutableShortEncodedValue.of((ShortEncodedValue)encodedValue);
52            case ValueType.CHAR:
53                return ImmutableCharEncodedValue.of((CharEncodedValue)encodedValue);
54            case ValueType.INT:
55                return ImmutableIntEncodedValue.of((IntEncodedValue)encodedValue);
56            case ValueType.LONG:
57                return ImmutableLongEncodedValue.of((LongEncodedValue)encodedValue);
58            case ValueType.FLOAT:
59                return ImmutableFloatEncodedValue.of((FloatEncodedValue)encodedValue);
60            case ValueType.DOUBLE:
61                return ImmutableDoubleEncodedValue.of((DoubleEncodedValue)encodedValue);
62            case ValueType.STRING:
63                return ImmutableStringEncodedValue.of((StringEncodedValue)encodedValue);
64            case ValueType.TYPE:
65                return ImmutableTypeEncodedValue.of((TypeEncodedValue)encodedValue);
66            case ValueType.FIELD:
67                return ImmutableFieldEncodedValue.of((FieldEncodedValue)encodedValue);
68            case ValueType.METHOD:
69                return ImmutableMethodEncodedValue.of((MethodEncodedValue)encodedValue);
70            case ValueType.ENUM:
71                return ImmutableEnumEncodedValue.of((EnumEncodedValue)encodedValue);
72            case ValueType.ARRAY:
73                return ImmutableArrayEncodedValue.of((ArrayEncodedValue)encodedValue);
74            case ValueType.ANNOTATION:
75                return ImmutableAnnotationEncodedValue.of((AnnotationEncodedValue)encodedValue);
76            case ValueType.NULL:
77                return ImmutableNullEncodedValue.INSTANCE;
78            case ValueType.BOOLEAN:
79                return ImmutableBooleanEncodedValue.of((BooleanEncodedValue)encodedValue);
80            default:
81                Preconditions.checkArgument(false);
82                return null;
83        }
84    }
85
86    @Nonnull
87    public static EncodedValue defaultValueForType(String type) {
88        switch (type.charAt(0)) {
89            case 'Z':
90                return ImmutableBooleanEncodedValue.FALSE_VALUE;
91            case 'B':
92                return new ImmutableByteEncodedValue((byte)0);
93            case 'S':
94                return new ImmutableShortEncodedValue((short)0);
95            case 'C':
96                return new ImmutableCharEncodedValue((char)0);
97            case 'I':
98                return new ImmutableIntEncodedValue(0);
99            case 'J':
100                return new ImmutableLongEncodedValue(0);
101            case 'F':
102                return new ImmutableFloatEncodedValue(0);
103            case 'D':
104                return new ImmutableDoubleEncodedValue(0);
105            case 'L':
106            case '[':
107                return ImmutableNullEncodedValue.INSTANCE;
108            default:
109                throw new ExceptionWithContext("Unrecognized type: %s", type);
110        }
111    }
112
113    @Nullable
114    public static ImmutableEncodedValue ofNullable(@Nullable EncodedValue encodedValue) {
115        if (encodedValue == null) {
116            return null;
117        }
118        return of(encodedValue);
119    }
120
121    @Nonnull
122    public static ImmutableList<ImmutableEncodedValue> immutableListOf
123            (@Nullable Iterable<? extends EncodedValue> list) {
124        return CONVERTER.toList(list);
125    }
126
127    private static final ImmutableConverter<ImmutableEncodedValue, EncodedValue> CONVERTER =
128            new ImmutableConverter<ImmutableEncodedValue, EncodedValue>() {
129                @Override
130                protected boolean isImmutable(@Nonnull EncodedValue item) {
131                    return item instanceof ImmutableEncodedValue;
132                }
133
134                @Nonnull
135                @Override
136                protected ImmutableEncodedValue makeImmutable(@Nonnull EncodedValue item) {
137                    return of(item);
138                }
139            };
140}
141