CategoryFilter.java revision 9158825f9c41869689d6b1786d7c7aa8bdd524ce 
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
17package com.android.server.firewall;
18
19import android.content.ComponentName;
20import android.content.Intent;
21import org.xmlpull.v1.XmlPullParser;
22import org.xmlpull.v1.XmlPullParserException;
23
24import java.io.IOException;
25import java.util.Set;
26
27class CategoryFilter implements Filter {
28    private static final String ATTR_NAME = "name";
29
30    private final String mCategoryName;
31
32    private CategoryFilter(String categoryName) {
33        mCategoryName = categoryName;
34    }
35
36    @Override
37    public boolean matches(IntentFirewall ifw, ComponentName resolvedComponent, Intent intent,
38            int callerUid, int callerPid, String resolvedType, int receivingUid) {
39        Set<String> categories = intent.getCategories();
40        if (categories == null) {
41            return false;
42        }
43        return categories.contains(mCategoryName);
44    }
45
46    public static final FilterFactory FACTORY = new FilterFactory("category") {
47        @Override
48        public Filter newFilter(XmlPullParser parser)
49                throws IOException, XmlPullParserException {
50            String categoryName = parser.getAttributeValue(null, ATTR_NAME);
51            if (categoryName == null) {
52                throw new XmlPullParserException("Category name must be specified.",
53                        parser, null);
54            }
55            return new CategoryFilter(categoryName);
56        }
57    };
58}
59