1 /*
2  * Copyright (C) 2022 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 com.android.server.pm.pkg;
18 
19 import android.annotation.NonNull;
20 import android.annotation.Nullable;
21 import android.content.pm.ApplicationInfo;
22 
23 import java.util.Collections;
24 import java.util.List;
25 import java.util.Objects;
26 
27 /** @hide */
28 public class AndroidPackageSplitImpl implements AndroidPackageSplit {
29 
30     @Nullable
31     private final String mName;
32     @NonNull
33     private final String mPath;
34     private final int mRevisionCode;
35     private final int mFlags;
36     @Nullable
37     private final String mClassLoaderName;
38 
39     @NonNull
40     private List<AndroidPackageSplit> mDependencies = Collections.emptyList();
41 
AndroidPackageSplitImpl(@ullable String name, @NonNull String path, int revisionCode, int flags, @Nullable String classLoaderName)42     public AndroidPackageSplitImpl(@Nullable String name, @NonNull String path, int revisionCode,
43             int flags, @Nullable String classLoaderName) {
44         mName = name;
45         mPath = path;
46         mRevisionCode = revisionCode;
47         mFlags = flags;
48         mClassLoaderName = classLoaderName;
49     }
50 
fillDependencies(@onNull List<AndroidPackageSplit> splits)51     public void fillDependencies(@NonNull List<AndroidPackageSplit> splits) {
52         if (!mDependencies.isEmpty()) {
53             throw new IllegalStateException("Cannot fill split dependencies more than once");
54         }
55         mDependencies = splits;
56     }
57 
58     @Nullable
59     @Override
getName()60     public String getName() {
61         return mName;
62     }
63 
64     @NonNull
65     @Override
getPath()66     public String getPath() {
67         return mPath;
68     }
69 
70     @Override
getRevisionCode()71     public int getRevisionCode() {
72         return mRevisionCode;
73     }
74 
75     @Override
isHasCode()76     public boolean isHasCode() {
77         return (mFlags & ApplicationInfo.FLAG_HAS_CODE) != 0;
78     }
79 
80     @Nullable
81     @Override
getClassLoaderName()82     public String getClassLoaderName() {
83         return mClassLoaderName;
84     }
85 
86     @NonNull
87     @Override
getDependencies()88     public List<AndroidPackageSplit> getDependencies() {
89         return mDependencies;
90     }
91 
92     @Override
equals(Object o)93     public boolean equals(Object o) {
94         if (this == o) return true;
95         if (!(o instanceof AndroidPackageSplitImpl)) return false;
96         AndroidPackageSplitImpl that = (AndroidPackageSplitImpl) o;
97         var fieldsEqual = mRevisionCode == that.mRevisionCode && mFlags == that.mFlags && Objects.equals(
98                 mName, that.mName) && Objects.equals(mPath, that.mPath)
99                 && Objects.equals(mClassLoaderName, that.mClassLoaderName);
100 
101         if (!fieldsEqual) return false;
102         if (mDependencies.size() != that.mDependencies.size()) return false;
103 
104         // Should be impossible, but to avoid circular dependencies,
105         // only search 1 level deep using split name
106         for (int index = 0; index < mDependencies.size(); index++) {
107             if (!Objects.equals(mDependencies.get(index).getName(),
108                     that.mDependencies.get(index).getName())) {
109                 return false;
110             }
111         }
112 
113         return true;
114     }
115 
116     @Override
hashCode()117     public int hashCode() {
118         // Should be impossible, but to avoid circular dependencies,
119         // only search 1 level deep using split name
120         var dependenciesHash = Objects.hash(mName, mPath, mRevisionCode, mFlags, mClassLoaderName);
121         for (int index = 0; index < mDependencies.size(); index++) {
122             var name = mDependencies.get(index).getName();
123             dependenciesHash = 31 * dependenciesHash + (name == null ? 0 : name.hashCode());
124         }
125         return dependenciesHash;
126     }
127 }
128