CstShort.java revision 579d7739c53a2707ad711a2d2cae46d7d782f061 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dx.rop.cst;
18
19import com.android.dx.rop.type.Type;
20import com.android.dx.util.Hex;
21
22/**
23 * Constants of type {@code short}.
24 */
25public final class CstShort
26        extends CstLiteral32 {
27    /** {@code non-null;} the value {@code 0} as an instance of this class */
28    public static final CstShort VALUE_0 = make((short) 0);
29
30    /**
31     * Makes an instance for the given value. This may (but does not
32     * necessarily) return an already-allocated instance.
33     *
34     * @param value the {@code short} value
35     * @return {@code non-null;} the appropriate instance
36     */
37    public static CstShort make(short value) {
38        return new CstShort(value);
39    }
40
41    /**
42     * Makes an instance for the given {@code int} value. This
43     * may (but does not necessarily) return an already-allocated
44     * instance.
45     *
46     * @param value the value, which must be in range for a {@code short}
47     * @return {@code non-null;} the appropriate instance
48     */
49    public static CstShort make(int value) {
50        short cast = (short) value;
51
52        if (cast != value) {
53            throw new IllegalArgumentException("bogus short value: " +
54                    value);
55        }
56
57        return make(cast);
58    }
59
60    /**
61     * Constructs an instance. This constructor is private; use {@link #make}.
62     *
63     * @param value the {@code short} value
64     */
65    private CstShort(short value) {
66        super(value);
67    }
68
69    /** {@inheritDoc} */
70    @Override
71    public String toString() {
72        int value = getIntBits();
73        return "short{0x" + Hex.u2(value) + " / " + value + '}';
74    }
75
76    /** {@inheritDoc} */
77    public Type getType() {
78        return Type.SHORT;
79    }
80
81    /** {@inheritDoc} */
82    @Override
83    public String typeName() {
84        return "short";
85    }
86
87    /** {@inheritDoc} */
88    public String toHuman() {
89        return Integer.toString(getIntBits());
90    }
91
92    /**
93     * Gets the {@code short} value.
94     *
95     * @return the value
96     */
97    public short getValue() {
98        return (short) getIntBits();
99    }
100}
101