1 /* 2 * Copyright (C) 2013 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.firewall; 18 19 import android.content.Intent; 20 import android.content.pm.ApplicationInfo; 21 import com.android.internal.util.XmlUtils; 22 import org.xmlpull.v1.XmlPullParser; 23 import org.xmlpull.v1.XmlPullParserException; 24 25 import java.io.IOException; 26 27 class NotFilter implements Filter { 28 private final Filter mChild; 29 30 private NotFilter(Filter child) { 31 mChild = child; 32 } 33 34 @Override 35 public boolean matches(IntentFirewall ifw, Intent intent, ApplicationInfo callerApp, 36 int callerUid, int callerPid, String resolvedType, ApplicationInfo resolvedApp) { 37 return !mChild.matches(ifw, intent, callerApp, callerUid, callerPid, resolvedType, 38 resolvedApp); 39 } 40 41 public static final FilterFactory FACTORY = new FilterFactory("not") { 42 @Override 43 public Filter newFilter(XmlPullParser parser) 44 throws IOException, XmlPullParserException { 45 Filter child = null; 46 int outerDepth = parser.getDepth(); 47 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 48 Filter filter = IntentFirewall.parseFilter(parser); 49 if (child == null) { 50 child = filter; 51 } else { 52 throw new XmlPullParserException( 53 "<not> tag can only contain a single child filter.", parser, null); 54 } 55 } 56 return new NotFilter(child); 57 } 58 }; 59 } 60
