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      1 /*
      2  * Copyright (C) 2014 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;
     18 
     19 import com.android.internal.util.XmlUtils;
     20 
     21 import org.xmlpull.v1.XmlPullParser;
     22 import org.xmlpull.v1.XmlPullParserException;
     23 import org.xmlpull.v1.XmlSerializer;
     24 
     25 import android.content.ComponentName;
     26 import android.content.IntentFilter;
     27 import android.util.Log;
     28 
     29 import java.io.IOException;
     30 
     31 class PersistentPreferredActivity extends IntentFilter {
     32     private static final String ATTR_NAME = "name"; // component name
     33     private static final String ATTR_FILTER = "filter"; // filter
     34 
     35     private static final String TAG = "PersistentPreferredActivity";
     36 
     37     private static final boolean DEBUG_FILTERS = false;
     38 
     39     final ComponentName mComponent;
     40 
     41     PersistentPreferredActivity(IntentFilter filter, ComponentName activity) {
     42         super(filter);
     43         mComponent = activity;
     44     }
     45 
     46     PersistentPreferredActivity(XmlPullParser parser) throws XmlPullParserException, IOException {
     47         String shortComponent = parser.getAttributeValue(null, ATTR_NAME);
     48         mComponent = ComponentName.unflattenFromString(shortComponent);
     49         if (mComponent == null) {
     50             PackageManagerService.reportSettingsProblem(Log.WARN,
     51                     "Error in package manager settings: " +
     52                             "Bad activity name " + shortComponent +
     53                             " at " + parser.getPositionDescription());
     54         }
     55         int outerDepth = parser.getDepth();
     56         String tagName = parser.getName();
     57         int type;
     58         while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
     59                 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
     60             tagName = parser.getName();
     61             if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
     62                 continue;
     63             } else if (type == XmlPullParser.START_TAG) {
     64                 if (tagName.equals(ATTR_FILTER)) {
     65                     break;
     66                 } else {
     67                     PackageManagerService.reportSettingsProblem(Log.WARN,
     68                             "Unknown element: " + tagName +
     69                             " at " + parser.getPositionDescription());
     70                     XmlUtils.skipCurrentTag(parser);
     71                 }
     72             }
     73         }
     74         if (tagName.equals(ATTR_FILTER)) {
     75             readFromXml(parser);
     76         } else {
     77             PackageManagerService.reportSettingsProblem(Log.WARN,
     78                     "Missing element filter at " +
     79                     parser.getPositionDescription());
     80             XmlUtils.skipCurrentTag(parser);
     81         }
     82     }
     83 
     84     public void writeToXml(XmlSerializer serializer) throws IOException {
     85         serializer.attribute(null, ATTR_NAME, mComponent.flattenToShortString());
     86         serializer.startTag(null, ATTR_FILTER);
     87             super.writeToXml(serializer);
     88         serializer.endTag(null, ATTR_FILTER);
     89     }
     90 
     91     @Override
     92     public String toString() {
     93         return "PersistentPreferredActivity{0x" + Integer.toHexString(System.identityHashCode(this))
     94                 + " " + mComponent.flattenToShortString() + "}";
     95     }
     96 }
     97