1/*
2 * Copyright (C) 2010 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.providers.calendar;
18
19import android.net.Uri;
20
21public class QueryParameterUtils {
22
23    public static boolean readBooleanQueryParameter(Uri uri, String name,
24            boolean defaultValue) {
25        final String flag = getQueryParameter(uri, name);
26        return flag == null
27                ? defaultValue
28                : (!"false".equals(flag.toLowerCase()) && !"0".equals(flag.toLowerCase()));
29    }
30
31    // Duplicated from ContactsProvider2.
32    /**
33     * A fast re-implementation of {@link android.net.Uri#getQueryParameter}
34     */
35    public static String getQueryParameter(Uri uri, String parameter) {
36        String query = uri.getEncodedQuery();
37        if (query == null) {
38            return null;
39        }
40
41        int queryLength = query.length();
42        int parameterLength = parameter.length();
43
44        String value;
45        int index = 0;
46        while (true) {
47            index = query.indexOf(parameter, index);
48            if (index == -1) {
49                return null;
50            }
51
52            index += parameterLength;
53
54            if (queryLength == index) {
55                return null;
56            }
57
58            if (query.charAt(index) == '=') {
59                index++;
60                break;
61            }
62        }
63
64        int ampIndex = query.indexOf('&', index);
65        if (ampIndex == -1) {
66            value = query.substring(index);
67        } else {
68            value = query.substring(index, ampIndex);
69        }
70
71        return Uri.decode(value);
72    }
73}
74