The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007-2008 Esmertec AG. |
| 3 | * Copyright (C) 2007-2008 The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | package com.google.android.mms.pdu; |
| 19 | |
| 20 | import android.util.Config; |
| 21 | import android.util.Log; |
| 22 | |
| 23 | import java.io.ByteArrayOutputStream; |
| 24 | import java.io.IOException; |
| 25 | import java.io.UnsupportedEncodingException; |
| 26 | import java.util.ArrayList; |
| 27 | |
| 28 | /** |
| 29 | * Encoded-string-value = Text-string | Value-length Char-set Text-string |
| 30 | */ |
| 31 | public class EncodedStringValue implements Cloneable { |
| 32 | private static final String TAG = "EncodedStringValue"; |
| 33 | private static final boolean DEBUG = false; |
| 34 | private static final boolean LOCAL_LOGV = DEBUG ? Config.LOGD : Config.LOGV; |
| 35 | |
| 36 | /** |
| 37 | * The Char-set value. |
| 38 | */ |
| 39 | private int mCharacterSet; |
| 40 | |
| 41 | /** |
| 42 | * The Text-string value. |
| 43 | */ |
| 44 | private byte[] mData; |
| 45 | |
| 46 | /** |
| 47 | * Constructor. |
| 48 | * |
| 49 | * @param charset the Char-set value |
| 50 | * @param data the Text-string value |
| 51 | * @throws NullPointerException if Text-string value is null. |
| 52 | */ |
| 53 | public EncodedStringValue(int charset, byte[] data) { |
| 54 | // TODO: CharSet needs to be validated against MIBEnum. |
| 55 | if(null == data) { |
| 56 | throw new NullPointerException("EncodedStringValue: Text-string is null."); |
| 57 | } |
| 58 | |
| 59 | mCharacterSet = charset; |
| 60 | mData = new byte[data.length]; |
| 61 | System.arraycopy(data, 0, mData, 0, data.length); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Constructor. |
| 66 | * |
| 67 | * @param data the Text-string value |
| 68 | * @throws NullPointerException if Text-string value is null. |
| 69 | */ |
| 70 | public EncodedStringValue(byte[] data) { |
| 71 | this(CharacterSets.DEFAULT_CHARSET, data); |
| 72 | } |
| 73 | |
| 74 | public EncodedStringValue(String data) { |
| 75 | try { |
| 76 | mData = data.getBytes(CharacterSets.DEFAULT_CHARSET_NAME); |
| 77 | mCharacterSet = CharacterSets.DEFAULT_CHARSET; |
| 78 | } catch (UnsupportedEncodingException e) { |
| 79 | Log.e(TAG, "Default encoding must be supported.", e); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Get Char-set value. |
| 85 | * |
| 86 | * @return the value |
| 87 | */ |
| 88 | public int getCharacterSet() { |
| 89 | return mCharacterSet; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Set Char-set value. |
| 94 | * |
| 95 | * @param charset the Char-set value |
| 96 | */ |
| 97 | public void setCharacterSet(int charset) { |
| 98 | // TODO: CharSet needs to be validated against MIBEnum. |
| 99 | mCharacterSet = charset; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Get Text-string value. |
| 104 | * |
| 105 | * @return the value |
| 106 | */ |
| 107 | public byte[] getTextString() { |
| 108 | byte[] byteArray = new byte[mData.length]; |
| 109 | |
| 110 | System.arraycopy(mData, 0, byteArray, 0, mData.length); |
| 111 | return byteArray; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Set Text-string value. |
| 116 | * |
| 117 | * @param textString the Text-string value |
| 118 | * @throws NullPointerException if Text-string value is null. |
| 119 | */ |
| 120 | public void setTextString(byte[] textString) { |
| 121 | if(null == textString) { |
| 122 | throw new NullPointerException("EncodedStringValue: Text-string is null."); |
| 123 | } |
| 124 | |
| 125 | mData = new byte[textString.length]; |
| 126 | System.arraycopy(textString, 0, mData, 0, textString.length); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Convert this object to a {@link java.lang.String}. If the encoding of |
| 131 | * the EncodedStringValue is null or unsupported, it will be |
| 132 | * treated as iso-8859-1 encoding. |
| 133 | * |
| 134 | * @return The decoded String. |
| 135 | */ |
| 136 | public String getString() { |
| 137 | if (CharacterSets.ANY_CHARSET == mCharacterSet) { |
| 138 | return new String(mData); // system default encoding. |
| 139 | } else { |
| 140 | try { |
| 141 | String name = CharacterSets.getMimeName(mCharacterSet); |
| 142 | return new String(mData, name); |
| 143 | } catch (UnsupportedEncodingException e) { |
| 144 | if (LOCAL_LOGV) { |
| 145 | Log.v(TAG, e.getMessage(), e); |
| 146 | } |
| 147 | try { |
| 148 | return new String(mData, CharacterSets.MIMENAME_ISO_8859_1); |
| 149 | } catch (UnsupportedEncodingException _) { |
| 150 | return new String(mData); // system default encoding. |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Append to Text-string. |
| 158 | * |
| 159 | * @param textString the textString to append |
| 160 | * @throws NullPointerException if the text String is null |
| 161 | * or an IOException occured. |
| 162 | */ |
| 163 | public void appendTextString(byte[] textString) { |
| 164 | if(null == textString) { |
| 165 | throw new NullPointerException("Text-string is null."); |
| 166 | } |
| 167 | |
| 168 | if(null == mData) { |
| 169 | mData = new byte[textString.length]; |
| 170 | System.arraycopy(textString, 0, mData, 0, textString.length); |
| 171 | } else { |
| 172 | ByteArrayOutputStream newTextString = new ByteArrayOutputStream(); |
| 173 | try { |
| 174 | newTextString.write(mData); |
| 175 | newTextString.write(textString); |
| 176 | } catch (IOException e) { |
| 177 | e.printStackTrace(); |
| 178 | throw new NullPointerException( |
| 179 | "appendTextString: failed when write a new Text-string"); |
| 180 | } |
| 181 | |
| 182 | mData = newTextString.toByteArray(); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * (non-Javadoc) |
| 188 | * @see java.lang.Object#clone() |
| 189 | */ |
| 190 | @Override |
| 191 | public Object clone() throws CloneNotSupportedException { |
| 192 | super.clone(); |
| 193 | int len = mData.length; |
| 194 | byte[] dstBytes = new byte[len]; |
| 195 | System.arraycopy(mData, 0, dstBytes, 0, len); |
| 196 | |
| 197 | try { |
| 198 | return new EncodedStringValue(mCharacterSet, dstBytes); |
| 199 | } catch (Exception e) { |
| 200 | Log.e(TAG, "failed to clone an EncodedStringValue: " + this); |
| 201 | e.printStackTrace(); |
| 202 | throw new CloneNotSupportedException(e.getMessage()); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Split this encoded string around matches of the given pattern. |
| 208 | * |
| 209 | * @param pattern the delimiting pattern |
| 210 | * @return the array of encoded strings computed by splitting this encoded |
| 211 | * string around matches of the given pattern |
| 212 | */ |
| 213 | public EncodedStringValue[] split(String pattern) { |
| 214 | String[] temp = getString().split(pattern); |
| 215 | EncodedStringValue[] ret = new EncodedStringValue[temp.length]; |
| 216 | for (int i = 0; i < ret.length; ++i) { |
| 217 | try { |
| 218 | ret[i] = new EncodedStringValue(mCharacterSet, |
| 219 | temp[i].getBytes()); |
| 220 | } catch (NullPointerException _) { |
| 221 | // Can't arrive here |
| 222 | return null; |
| 223 | } |
| 224 | } |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Extract an EncodedStringValue[] from a given String. |
| 230 | */ |
| 231 | public static EncodedStringValue[] extract(String src) { |
| 232 | String[] values = src.split(";"); |
| 233 | |
| 234 | ArrayList<EncodedStringValue> list = new ArrayList<EncodedStringValue>(); |
| 235 | for (int i = 0; i < values.length; i++) { |
| 236 | if (values[i].length() > 0) { |
| 237 | list.add(new EncodedStringValue(values[i])); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | int len = list.size(); |
| 242 | if (len > 0) { |
| 243 | return list.toArray(new EncodedStringValue[len]); |
| 244 | } else { |
| 245 | return null; |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Concatenate an EncodedStringValue[] into a single String. |
| 251 | */ |
| 252 | public static String concat(EncodedStringValue[] addr) { |
| 253 | StringBuilder sb = new StringBuilder(); |
| 254 | int maxIndex = addr.length - 1; |
| 255 | for (int i = 0; i <= maxIndex; i++) { |
| 256 | sb.append(addr[i].getString()); |
| 257 | if (i < maxIndex) { |
| 258 | sb.append(";"); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | return sb.toString(); |
| 263 | } |
| 264 | |
| 265 | public static EncodedStringValue copy(EncodedStringValue value) { |
| 266 | if (value == null) { |
| 267 | return null; |
| 268 | } |
| 269 | |
| 270 | return new EncodedStringValue(value.mCharacterSet, value.mData); |
| 271 | } |
| 272 | } |