1 /* 2 * Copyright (C) 2016 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.bluetooth.pbapclient.utils; 18 19 import android.util.Log; 20 21 import java.text.ParseException; 22 import java.util.regex.Matcher; 23 import java.util.regex.Pattern; 24 25 public 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 Property(String name, String value)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 toString()51 public String toString() { 52 return name + ":" + value; 53 } 54 55 @Override equals(Object o)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 BmsgTokenizer(String str)62 public BmsgTokenizer(String str) { 63 this(str, 0); 64 } 65 BmsgTokenizer(String str, int offset)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 next(boolean alwaysReturn)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 next()97 public Property next() throws ParseException { 98 return next(false); 99 } 100 remaining()101 public String remaining() { 102 return mStr.substring(mPos); 103 } 104 pos()105 public int pos() { 106 return mPos + mOffset; 107 } 108 } 109