1 /*
2  * Copyright (C) 2020 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 
17 package androidx.constraintlayout.core.motion.utils;
18 
19 import java.util.Arrays;
20 import java.util.HashMap;
21 
22 /**
23  * Used by KeyTimeCycles (and any future time dependent behaviour) to cache its current parameters
24  * to maintain consistency across requestLayout type rebuilds.
25  */
26 public class KeyCache {
27 
28     HashMap<Object, HashMap<String, float[]>> mMap = new HashMap<>();
29 
30     // @TODO: add description
setFloatValue(Object view, String type, int element, float value)31     public void setFloatValue(Object view, String type, int element, float value) {
32         if (!mMap.containsKey(view)) {
33             HashMap<String, float[]> array = new HashMap<>();
34             float[] vArray = new float[element + 1];
35             vArray[element] = value;
36             array.put(type, vArray);
37             mMap.put(view, array);
38         } else {
39             HashMap<String, float[]> array = mMap.get(view);
40             if (array == null) {
41                 array = new HashMap<>();
42             }
43 
44             if (!array.containsKey(type)) {
45                 float[] vArray = new float[element + 1];
46                 vArray[element] = value;
47                 array.put(type, vArray);
48                 mMap.put(view, array);
49             } else {
50                 float[] vArray = array.get(type);
51                 if (vArray == null) {
52                     vArray = new float[0];
53                 }
54                 if (vArray.length <= element) {
55                     vArray = Arrays.copyOf(vArray, element + 1);
56                 }
57                 vArray[element] = value;
58                 array.put(type, vArray);
59             }
60         }
61     }
62 
63     // @TODO: add description
getFloatValue(Object view, String type, int element)64     public float getFloatValue(Object view, String type, int element) {
65         if (!mMap.containsKey(view)) {
66             return Float.NaN;
67         } else {
68             HashMap<String, float[]> array = mMap.get(view);
69             if (array == null || !array.containsKey(type)) {
70                 return Float.NaN;
71             }
72             float[] vArray = array.get(type);
73             if (vArray == null) {
74                 return Float.NaN;
75             }
76             if (vArray.length > element) {
77                 return vArray[element];
78             }
79             return Float.NaN;
80         }
81     }
82 }
83