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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.android.server.slice;
import android.annotation.NonNull;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.Slog;
import com.android.server.slice.DirtyTracker.Persistable;
import com.android.server.slice.SlicePermissionManager.PkgUser;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Objects;
public class SliceProviderPermissions implements DirtyTracker, Persistable {
private static final String TAG = "SliceProviderPermissions";
static final String TAG_PROVIDER = "provider";
private static final String TAG_AUTHORITY = "authority";
private static final String TAG_PKG = "pkg";
private static final String NAMESPACE = null;
private static final String ATTR_PKG = "pkg";
private static final String ATTR_AUTHORITY = "authority";
private final PkgUser mPkg;
private final ArrayMap<String, SliceAuthority> mAuths = new ArrayMap<>();
private final DirtyTracker mTracker;
public SliceProviderPermissions(@NonNull PkgUser pkg, @NonNull DirtyTracker tracker) {
mPkg = pkg;
mTracker = tracker;
}
public PkgUser getPkg() {
return mPkg;
}
public synchronized Collection<SliceAuthority> getAuthorities() {
return new ArrayList<>(mAuths.values());
}
public synchronized SliceAuthority getOrCreateAuthority(String authority) {
SliceAuthority ret = mAuths.get(authority);
if (ret == null) {
ret = new SliceAuthority(authority, this);
mAuths.put(authority, ret);
onPersistableDirty(ret);
}
return ret;
}
@Override
public void onPersistableDirty(Persistable obj) {
mTracker.onPersistableDirty(this);
}
@Override
public String getFileName() {
return getFileName(mPkg);
}
public synchronized void writeTo(XmlSerializer out) throws IOException {
out.startTag(NAMESPACE, TAG_PROVIDER);
out.attribute(NAMESPACE, ATTR_PKG, mPkg.toString());
final int N = mAuths.size();
for (int i = 0; i < N; i++) {
out.startTag(NAMESPACE, TAG_AUTHORITY);
out.attribute(NAMESPACE, ATTR_AUTHORITY, mAuths.valueAt(i).mAuthority);
mAuths.valueAt(i).writeTo(out);
out.endTag(NAMESPACE, TAG_AUTHORITY);
}
out.endTag(NAMESPACE, TAG_PROVIDER);
}
public static SliceProviderPermissions createFrom(XmlPullParser parser, DirtyTracker tracker)
throws XmlPullParserException, IOException {
// Get to the beginning of the provider.
while (parser.getEventType() != XmlPullParser.START_TAG
|| !TAG_PROVIDER.equals(parser.getName())) {
parser.next();
}
int depth = parser.getDepth();
PkgUser pkgUser = new PkgUser(parser.getAttributeValue(NAMESPACE, ATTR_PKG));
SliceProviderPermissions provider = new SliceProviderPermissions(pkgUser, tracker);
parser.next();
while (parser.getDepth() > depth) {
if (parser.getEventType() == XmlPullParser.START_TAG
&& TAG_AUTHORITY.equals(parser.getName())) {
try {
SliceAuthority authority = new SliceAuthority(
parser.getAttributeValue(NAMESPACE, ATTR_AUTHORITY), provider);
authority.readFrom(parser);
provider.mAuths.put(authority.getAuthority(), authority);
} catch (IllegalArgumentException e) {
Slog.e(TAG, "Couldn't read PkgUser", e);
}
}
parser.next();
}
return provider;
}
public static String getFileName(PkgUser pkg) {
return String.format("provider_%s", pkg.toString());
}
public static class SliceAuthority implements Persistable {
private final String mAuthority;
private final DirtyTracker mTracker;
private final ArraySet<PkgUser> mPkgs = new ArraySet<>();
public SliceAuthority(String authority, DirtyTracker tracker) {
mAuthority = authority;
mTracker = tracker;
}
public String getAuthority() {
return mAuthority;
}
public synchronized void addPkg(PkgUser pkg) {
if (mPkgs.add(pkg)) {
mTracker.onPersistableDirty(this);
}
}
public synchronized void removePkg(PkgUser pkg) {
if (mPkgs.remove(pkg)) {
mTracker.onPersistableDirty(this);
}
}
public synchronized Collection<PkgUser> getPkgs() {
return new ArraySet<>(mPkgs);
}
@Override
public String getFileName() {
return null;
}
public synchronized void writeTo(XmlSerializer out) throws IOException {
final int N = mPkgs.size();
for (int i = 0; i < N; i++) {
out.startTag(NAMESPACE, TAG_PKG);
out.text(mPkgs.valueAt(i).toString());
out.endTag(NAMESPACE, TAG_PKG);
}
}
public synchronized void readFrom(XmlPullParser parser)
throws IOException, XmlPullParserException {
parser.next();
int depth = parser.getDepth();
while (parser.getDepth() >= depth) {
if (parser.getEventType() == XmlPullParser.START_TAG
&& TAG_PKG.equals(parser.getName())) {
mPkgs.add(new PkgUser(parser.nextText()));
}
parser.next();
}
}
@Override
public boolean equals(Object obj) {
if (!getClass().equals(obj != null ? obj.getClass() : null)) return false;
SliceAuthority other = (SliceAuthority) obj;
return Objects.equals(mAuthority, other.mAuthority)
&& Objects.equals(mPkgs, other.mPkgs);
}
@Override
public String toString() {
return String.format("(%s: %s)", mAuthority, mPkgs.toString());
}
}
}
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