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/*
* Copyright (C) 2016 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 android.service.autofill;
import android.Manifest;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.app.AppGlobals;
import android.content.ComponentName;
import android.content.pm.PackageManager;
import android.content.pm.ServiceInfo;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.os.RemoteException;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Xml;
import com.android.internal.R;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
/**
* {@link ServiceInfo} and meta-data about an {@link AutofillService}.
*
* @hide
*/
public final class AutofillServiceInfo {
private static final String TAG = "AutofillServiceInfo";
private static ServiceInfo getServiceInfoOrThrow(ComponentName comp, int userHandle)
throws PackageManager.NameNotFoundException {
try {
ServiceInfo si = AppGlobals.getPackageManager().getServiceInfo(
comp,
PackageManager.GET_META_DATA,
userHandle);
if (si != null) {
return si;
}
} catch (RemoteException e) {
}
throw new PackageManager.NameNotFoundException(comp.toString());
}
@NonNull
private final ServiceInfo mServiceInfo;
@Nullable
private final String mSettingsActivity;
public AutofillServiceInfo(PackageManager pm, ComponentName comp, int userHandle)
throws PackageManager.NameNotFoundException {
this(pm, getServiceInfoOrThrow(comp, userHandle));
}
public AutofillServiceInfo(PackageManager pm, ServiceInfo si) {
mServiceInfo = si;
final TypedArray metaDataArray = getMetaDataArray(pm, si);
if (metaDataArray != null) {
mSettingsActivity = metaDataArray
.getString(R.styleable.AutofillService_settingsActivity);
metaDataArray.recycle();
} else {
mSettingsActivity = null;
}
}
/**
* Gets the meta-data as a {@link TypedArray}, or {@code null} if not provided,
* or throws if invalid.
*/
@Nullable
private static TypedArray getMetaDataArray(PackageManager pm, ServiceInfo si) {
// Check for permissions.
// TODO(b/37563972): remove support to BIND_AUTOFILL once clients use BIND_AUTOFILL_SERVICE
if (!Manifest.permission.BIND_AUTOFILL_SERVICE.equals(si.permission)
&& !Manifest.permission.BIND_AUTOFILL.equals(si.permission)) {
Log.w(TAG, "AutofillService from '" + si.packageName + "' does not require permission "
+ Manifest.permission.BIND_AUTOFILL_SERVICE);
throw new SecurityException("Service does not require permission "
+ Manifest.permission.BIND_AUTOFILL_SERVICE);
}
// Get the AutoFill metadata, if declared.
XmlResourceParser parser = si.loadXmlMetaData(pm, AutofillService.SERVICE_META_DATA);
if (parser == null) {
return null;
}
// Parse service info and get the <autofill-service> tag as an AttributeSet.
AttributeSet attrs;
try {
// Move the XML parser to the first tag.
try {
int type;
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& type != XmlPullParser.START_TAG) {
}
} catch (XmlPullParserException | IOException e) {
Log.e(TAG, "Error parsing auto fill service meta-data", e);
return null;
}
if (!"autofill-service".equals(parser.getName())) {
Log.e(TAG, "Meta-data does not start with autofill-service tag");
return null;
}
attrs = Xml.asAttributeSet(parser);
// Get resources required to read the AttributeSet.
Resources res;
try {
res = pm.getResourcesForApplication(si.applicationInfo);
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "Error getting application resources", e);
return null;
}
return res.obtainAttributes(attrs, R.styleable.AutofillService);
} finally {
parser.close();
}
}
public ServiceInfo getServiceInfo() {
return mServiceInfo;
}
@Nullable
public String getSettingsActivity() {
return mSettingsActivity;
}
@Override
public String toString() {
return mServiceInfo == null ? "null" : mServiceInfo.toString();
}
}
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