1/*
2 * Copyright (C) 2014 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 android.bluetooth.client.pbap.utils;
18
19import android.util.Log;
20
21import java.text.ParseException;
22import java.util.regex.Matcher;
23import java.util.regex.Pattern;
24
25public final class BmsgTokenizer {
26
27    private final String mStr;
28
29    private final Matcher mMatcher;
30
31    private int mPos = 0;
32
33    private final int mOffset;
34
35    static public class Property {
36        public final String name;
37        public final String value;
38
39        public Property(String name, String value) {
40            if (name == null || value == null) {
41                throw new IllegalArgumentException();
42            }
43
44            this.name = name;
45            this.value = value;
46
47            Log.v("BMSG >> ", toString());
48        }
49
50        @Override
51        public String toString() {
52            return name + ":" + value;
53        }
54
55        @Override
56        public boolean equals(Object o) {
57            return ((o instanceof Property) && ((Property) o).name.equals(name) && ((Property) o).value
58                    .equals(value));
59        }
60    };
61
62    public BmsgTokenizer(String str) {
63        this(str, 0);
64    }
65
66    public BmsgTokenizer(String str, int offset) {
67        mStr = str;
68        mOffset = offset;
69        mMatcher = Pattern.compile("(([^:]*):(.*))?\r\n").matcher(str);
70        mPos = mMatcher.regionStart();
71    }
72
73    public Property next(boolean alwaysReturn) throws ParseException {
74        boolean found = false;
75
76        do {
77            mMatcher.region(mPos, mMatcher.regionEnd());
78
79            if (!mMatcher.lookingAt()) {
80                if (alwaysReturn) {
81                    return null;
82                }
83
84                throw new ParseException("Property or empty line expected", pos());
85            }
86
87            mPos = mMatcher.end();
88
89            if (mMatcher.group(1) != null) {
90                found = true;
91            }
92        } while (!found);
93
94        return new Property(mMatcher.group(2), mMatcher.group(3));
95    }
96
97    public Property next() throws ParseException {
98        return next(false);
99    }
100
101    public String remaining() {
102        return mStr.substring(mPos);
103    }
104
105    public int pos() {
106        return mPos + mOffset;
107    }
108}
109