content: /*
   * Copyright (C) 2013 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.firewall;
  
  import android.content.ComponentName;
  import android.content.Intent;
  import org.xmlpull.v1.XmlPullParser;
  import org.xmlpull.v1.XmlPullParserException;
  
  import java.io.IOException;
  import java.util.Set;
  
  class CategoryFilter implements Filter {
      private static final String ATTR_NAME = "name";
  
      private final String mCategoryName;
  
      private CategoryFilter(String categoryName) {
          mCategoryName = categoryName;
      }
  
      @Override
      public boolean matches(IntentFirewall ifw, ComponentName resolvedComponent, Intent intent,
              int callerUid, int callerPid, String resolvedType, int receivingUid) {
          Set<String> categories = intent.getCategories();
          if (categories == null) {
              return false;
          }
          return categories.contains(mCategoryName);
      }
  
      public static final FilterFactory FACTORY = new FilterFactory("category") {
          @Override
          public Filter newFilter(XmlPullParser parser)
                  throws IOException, XmlPullParserException {
              String categoryName = parser.getAttributeValue(null, ATTR_NAME);
              if (categoryName == null) {
                  throw new XmlPullParserException("Category name must be specified.",
                          parser, null);
              }
              return new CategoryFilter(categoryName);
          }
      };
  }
  