1/*
2 * Copyright (C) 2011 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.io.instructions;
18
19import java.io.EOFException;
20import java.util.HashMap;
21
22/**
23 * Map from addresses to addresses, where addresses are all
24 * {@code int}s.
25 */
26public final class AddressMap {
27    /** underlying map. TODO: This might be too inefficient. */
28    private final HashMap<Integer,Integer> map;
29
30    /**
31     * Constructs an instance.
32     */
33    public AddressMap() {
34        map = new HashMap<Integer,Integer>();
35    }
36
37    /**
38     * Gets the value address corresponding to the given key address. Returns
39     * {@code -1} if there is no mapping.
40     */
41    public int get(int keyAddress) {
42        Integer value = map.get(keyAddress);
43        return (value == null) ? -1 : value;
44    }
45
46    /**
47     * Sets the value address associated with the given key address.
48     */
49    public void put(int keyAddress, int valueAddress) {
50        map.put(keyAddress, valueAddress);
51    }
52}
53