1/*
2 * Copyright (C) 2012 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.layoutlib.bridge.util;
18
19import com.android.resources.ResourceType;
20import com.android.util.Pair;
21
22import android.annotation.NonNull;
23import android.util.SparseArray;
24
25import java.util.HashMap;
26import java.util.Map;
27
28public class DynamicIdMap {
29
30    private final Map<Pair<ResourceType, String>, Integer> mDynamicIds = new HashMap<>();
31    private final SparseArray<Pair<ResourceType, String>> mRevDynamicIds = new SparseArray<>();
32    private int mDynamicSeed;
33
34    public DynamicIdMap(int seed) {
35        mDynamicSeed = seed;
36    }
37
38    public void reset(int seed) {
39        mDynamicIds.clear();
40        mRevDynamicIds.clear();
41        mDynamicSeed = seed;
42    }
43
44    /**
45     * Returns a dynamic integer for the given resource type/name, creating it if it doesn't
46     * already exist.
47     *
48     * @param type the type of the resource
49     * @param name the name of the resource
50     * @return an integer.
51     */
52    @NonNull
53    public Integer getId(ResourceType type, String name) {
54        return getId(Pair.of(type, name));
55    }
56
57    /**
58     * Returns a dynamic integer for the given resource type/name, creating it if it doesn't
59     * already exist.
60     *
61     * @param resource the type/name of the resource
62     * @return an integer.
63     */
64    @NonNull
65    public Integer getId(Pair<ResourceType, String> resource) {
66        Integer value = mDynamicIds.get(resource);
67        if (value == null) {
68            value = ++mDynamicSeed;
69            mDynamicIds.put(resource, value);
70            mRevDynamicIds.put(value, resource);
71        }
72
73        return value;
74    }
75
76    public Pair<ResourceType, String> resolveId(int id) {
77        return mRevDynamicIds.get(id);
78    }
79}
80