Jason Monk | bf3eedc | 2018-04-05 20:56:42 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file |
| 5 | * except in compliance with the License. You may obtain a copy of the License at |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software distributed under the |
| 10 | * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 11 | * KIND, either express or implied. See the License for the specific language governing |
| 12 | * permissions and limitations under the License. |
| 13 | */ |
| 14 | |
| 15 | package com.android.server.slice; |
| 16 | |
| 17 | import android.annotation.NonNull; |
| 18 | import android.util.ArrayMap; |
| 19 | import android.util.ArraySet; |
| 20 | import android.util.Slog; |
| 21 | |
| 22 | import com.android.server.slice.DirtyTracker.Persistable; |
| 23 | import com.android.server.slice.SlicePermissionManager.PkgUser; |
| 24 | |
| 25 | import org.xmlpull.v1.XmlPullParser; |
| 26 | import org.xmlpull.v1.XmlPullParserException; |
| 27 | import org.xmlpull.v1.XmlSerializer; |
| 28 | |
| 29 | import java.io.IOException; |
| 30 | import java.util.ArrayList; |
| 31 | import java.util.Collection; |
| 32 | import java.util.Objects; |
| 33 | |
| 34 | public class SliceProviderPermissions implements DirtyTracker, Persistable { |
| 35 | |
| 36 | private static final String TAG = "SliceProviderPermissions"; |
| 37 | |
| 38 | static final String TAG_PROVIDER = "provider"; |
| 39 | private static final String TAG_AUTHORITY = "authority"; |
| 40 | private static final String TAG_PKG = "pkg"; |
| 41 | private static final String NAMESPACE = null; |
| 42 | |
| 43 | private static final String ATTR_PKG = "pkg"; |
| 44 | private static final String ATTR_AUTHORITY = "authority"; |
| 45 | |
| 46 | private final PkgUser mPkg; |
| 47 | private final ArrayMap<String, SliceAuthority> mAuths = new ArrayMap<>(); |
| 48 | private final DirtyTracker mTracker; |
| 49 | |
| 50 | public SliceProviderPermissions(@NonNull PkgUser pkg, @NonNull DirtyTracker tracker) { |
| 51 | mPkg = pkg; |
| 52 | mTracker = tracker; |
| 53 | } |
| 54 | |
| 55 | public PkgUser getPkg() { |
| 56 | return mPkg; |
| 57 | } |
| 58 | |
| 59 | public synchronized Collection<SliceAuthority> getAuthorities() { |
| 60 | return new ArrayList<>(mAuths.values()); |
| 61 | } |
| 62 | |
| 63 | public synchronized SliceAuthority getOrCreateAuthority(String authority) { |
| 64 | SliceAuthority ret = mAuths.get(authority); |
| 65 | if (ret == null) { |
| 66 | ret = new SliceAuthority(authority, this); |
| 67 | mAuths.put(authority, ret); |
| 68 | onPersistableDirty(ret); |
| 69 | } |
| 70 | return ret; |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public void onPersistableDirty(Persistable obj) { |
| 75 | mTracker.onPersistableDirty(this); |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public String getFileName() { |
| 80 | return getFileName(mPkg); |
| 81 | } |
| 82 | |
| 83 | public synchronized void writeTo(XmlSerializer out) throws IOException { |
| 84 | out.startTag(NAMESPACE, TAG_PROVIDER); |
| 85 | out.attribute(NAMESPACE, ATTR_PKG, mPkg.toString()); |
| 86 | |
| 87 | final int N = mAuths.size(); |
| 88 | for (int i = 0; i < N; i++) { |
| 89 | out.startTag(NAMESPACE, TAG_AUTHORITY); |
| 90 | out.attribute(NAMESPACE, ATTR_AUTHORITY, mAuths.valueAt(i).mAuthority); |
| 91 | |
| 92 | mAuths.valueAt(i).writeTo(out); |
| 93 | |
| 94 | out.endTag(NAMESPACE, TAG_AUTHORITY); |
| 95 | } |
| 96 | |
| 97 | out.endTag(NAMESPACE, TAG_PROVIDER); |
| 98 | } |
| 99 | |
| 100 | public static SliceProviderPermissions createFrom(XmlPullParser parser, DirtyTracker tracker) |
| 101 | throws XmlPullParserException, IOException { |
| 102 | // Get to the beginning of the provider. |
| 103 | while (parser.getEventType() != XmlPullParser.START_TAG |
| 104 | || !TAG_PROVIDER.equals(parser.getName())) { |
| 105 | parser.next(); |
| 106 | } |
| 107 | int depth = parser.getDepth(); |
| 108 | PkgUser pkgUser = new PkgUser(parser.getAttributeValue(NAMESPACE, ATTR_PKG)); |
| 109 | SliceProviderPermissions provider = new SliceProviderPermissions(pkgUser, tracker); |
| 110 | parser.next(); |
| 111 | |
| 112 | while (parser.getDepth() > depth) { |
| 113 | if (parser.getEventType() == XmlPullParser.START_TAG |
| 114 | && TAG_AUTHORITY.equals(parser.getName())) { |
| 115 | try { |
| 116 | SliceAuthority authority = new SliceAuthority( |
| 117 | parser.getAttributeValue(NAMESPACE, ATTR_AUTHORITY), provider); |
| 118 | authority.readFrom(parser); |
| 119 | provider.mAuths.put(authority.getAuthority(), authority); |
| 120 | } catch (IllegalArgumentException e) { |
| 121 | Slog.e(TAG, "Couldn't read PkgUser", e); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | parser.next(); |
| 126 | } |
| 127 | return provider; |
| 128 | } |
| 129 | |
| 130 | public static String getFileName(PkgUser pkg) { |
| 131 | return String.format("provider_%s", pkg.toString()); |
| 132 | } |
| 133 | |
| 134 | public static class SliceAuthority implements Persistable { |
| 135 | private final String mAuthority; |
| 136 | private final DirtyTracker mTracker; |
| 137 | private final ArraySet<PkgUser> mPkgs = new ArraySet<>(); |
| 138 | |
| 139 | public SliceAuthority(String authority, DirtyTracker tracker) { |
| 140 | mAuthority = authority; |
| 141 | mTracker = tracker; |
| 142 | } |
| 143 | |
| 144 | public String getAuthority() { |
| 145 | return mAuthority; |
| 146 | } |
| 147 | |
| 148 | public synchronized void addPkg(PkgUser pkg) { |
| 149 | if (mPkgs.add(pkg)) { |
| 150 | mTracker.onPersistableDirty(this); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | public synchronized void removePkg(PkgUser pkg) { |
| 155 | if (mPkgs.remove(pkg)) { |
| 156 | mTracker.onPersistableDirty(this); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | public synchronized Collection<PkgUser> getPkgs() { |
| 161 | return new ArraySet<>(mPkgs); |
| 162 | } |
| 163 | |
| 164 | @Override |
| 165 | public String getFileName() { |
| 166 | return null; |
| 167 | } |
| 168 | |
| 169 | public synchronized void writeTo(XmlSerializer out) throws IOException { |
| 170 | final int N = mPkgs.size(); |
| 171 | for (int i = 0; i < N; i++) { |
| 172 | out.startTag(NAMESPACE, TAG_PKG); |
| 173 | out.text(mPkgs.valueAt(i).toString()); |
| 174 | out.endTag(NAMESPACE, TAG_PKG); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | public synchronized void readFrom(XmlPullParser parser) |
| 179 | throws IOException, XmlPullParserException { |
| 180 | parser.next(); |
| 181 | int depth = parser.getDepth(); |
| 182 | while (parser.getDepth() >= depth) { |
| 183 | if (parser.getEventType() == XmlPullParser.START_TAG |
| 184 | && TAG_PKG.equals(parser.getName())) { |
| 185 | mPkgs.add(new PkgUser(parser.nextText())); |
| 186 | } |
| 187 | parser.next(); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | @Override |
| 192 | public boolean equals(Object obj) { |
| 193 | if (!getClass().equals(obj != null ? obj.getClass() : null)) return false; |
| 194 | SliceAuthority other = (SliceAuthority) obj; |
| 195 | return Objects.equals(mAuthority, other.mAuthority) |
| 196 | && Objects.equals(mPkgs, other.mPkgs); |
| 197 | } |
| 198 | |
| 199 | @Override |
| 200 | public String toString() { |
| 201 | return String.format("(%s: %s)", mAuthority, mPkgs.toString()); |
| 202 | } |
| 203 | } |
| 204 | } |