content: /*
   * Copyright 2014, 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.pm;
  
  import com.android.internal.util.XmlUtils;
  import org.xmlpull.v1.XmlPullParser;
  import org.xmlpull.v1.XmlPullParserException;
  import org.xmlpull.v1.XmlSerializer;
  import android.content.IntentFilter;
  import android.util.Log;
  import java.io.IOException;
  import android.os.UserHandle;
  
  /**
   * The {@link PackageManagerService} maintains some {@link CrossProfileIntentFilter}s for each user.
   * If an {@link Intent} matches the {@link CrossProfileIntentFilter}, then activities in the user
   * {@link #mTargetUserId} can access it.
   */
  class CrossProfileIntentFilter extends IntentFilter {
      private static final String ATTR_TARGET_USER_ID = "targetUserId";
      private static final String ATTR_FLAGS = "flags";
      private static final String ATTR_OWNER_PACKAGE = "ownerPackage";
      private static final String ATTR_FILTER = "filter";
  
      private static final String TAG = "CrossProfileIntentFilter";
  
      // If the intent matches the IntentFilter, then it can be forwarded to this userId.
      final int mTargetUserId;
      final String mOwnerPackage; // packageName of the app.
      final int mFlags;
  
      CrossProfileIntentFilter(IntentFilter filter, String ownerPackage, int targetUserId,
              int flags) {
          super(filter);
          mTargetUserId = targetUserId;
          mOwnerPackage = ownerPackage;
          mFlags = flags;
      }
  
      public int getTargetUserId() {
          return mTargetUserId;
      }
  
      public int getFlags() {
          return mFlags;
      }
  
      public String getOwnerPackage() {
          return mOwnerPackage;
      }
  
      CrossProfileIntentFilter(XmlPullParser parser) throws XmlPullParserException, IOException {
          mTargetUserId = getIntFromXml(parser, ATTR_TARGET_USER_ID, UserHandle.USER_NULL);
          mOwnerPackage = getStringFromXml(parser, ATTR_OWNER_PACKAGE, "");
          mFlags = getIntFromXml(parser, ATTR_FLAGS, 0);
  
          int outerDepth = parser.getDepth();
          String tagName = parser.getName();
          int type;
          while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
                  && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
              tagName = parser.getName();
              if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
                  continue;
              } else if (type == XmlPullParser.START_TAG) {
                  if (tagName.equals(ATTR_FILTER)) {
                      break;
                  } else {
                      String msg = "Unknown element under "
                              + Settings.TAG_CROSS_PROFILE_INTENT_FILTERS + ": " + tagName + " at "
                              + parser.getPositionDescription();
                      PackageManagerService.reportSettingsProblem(Log.WARN, msg);
                      XmlUtils.skipCurrentTag(parser);
                  }
              }
          }
          if (tagName.equals(ATTR_FILTER)) {
              readFromXml(parser);
          } else {
              String msg = "Missing element under " + TAG + ": " + ATTR_FILTER +
                      " at " + parser.getPositionDescription();
              PackageManagerService.reportSettingsProblem(Log.WARN, msg);
              XmlUtils.skipCurrentTag(parser);
          }
      }
  
      String getStringFromXml(XmlPullParser parser, String attribute, String defaultValue) {
          String value = parser.getAttributeValue(null, attribute);
          if (value == null) {
              String msg = "Missing element under " + TAG +": " + attribute + " at " +
                      parser.getPositionDescription();
              PackageManagerService.reportSettingsProblem(Log.WARN, msg);
              return defaultValue;
          } else {
              return value;
          }
      }
  
      int getIntFromXml(XmlPullParser parser, String attribute, int defaultValue) {
          String stringValue = getStringFromXml(parser, attribute, null);
          if (stringValue != null) {
              return Integer.parseInt(stringValue);
          }
          return defaultValue;
      }
  
      public void writeToXml(XmlSerializer serializer) throws IOException {
          serializer.attribute(null, ATTR_TARGET_USER_ID, Integer.toString(mTargetUserId));
          serializer.attribute(null, ATTR_FLAGS, Integer.toString(mFlags));
          serializer.attribute(null, ATTR_OWNER_PACKAGE, mOwnerPackage);
          serializer.startTag(null, ATTR_FILTER);
              super.writeToXml(serializer);
          serializer.endTag(null, ATTR_FILTER);
      }
  
      @Override
      public String toString() {
          return "CrossProfileIntentFilter{0x" + Integer.toHexString(System.identityHashCode(this))
                  + " " + Integer.toString(mTargetUserId) + "}";
      }
  
      boolean equalsIgnoreFilter(CrossProfileIntentFilter other) {
          return mTargetUserId == other.mTargetUserId
                  && mOwnerPackage.equals(other.mOwnerPackage)
                  && mFlags == other.mFlags;
      }
  }
  