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