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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.example.android.mmslib.pdu;
19 
20 import android.util.Log;
21 
22 import java.io.ByteArrayOutputStream;
23 import java.io.IOException;
24 import java.io.UnsupportedEncodingException;
25 import java.util.ArrayList;
26 
27 /**
28  * Encoded-string-value = Text-string | Value-length Char-set Text-string
29  */
30 public class EncodedStringValue implements Cloneable {
31     private static final String TAG = "EncodedStringValue";
32     private static final boolean DEBUG = false;
33     private static final boolean LOCAL_LOGV = false;
34 
35     /**
36      * The Char-set value.
37      */
38     private int mCharacterSet;
39 
40     /**
41      * The Text-string value.
42      */
43     private byte[] mData;
44 
45     /**
46      * Constructor.
47      *
48      * @param charset the Char-set value
49      * @param data the Text-string value
50      * @throws NullPointerException if Text-string value is null.
51      */
EncodedStringValue(int charset, byte[] data)52     public EncodedStringValue(int charset, byte[] data) {
53         // TODO: CharSet needs to be validated against MIBEnum.
54         if(null == data) {
55             throw new NullPointerException("EncodedStringValue: Text-string is null.");
56         }
57 
58         mCharacterSet = charset;
59         mData = new byte[data.length];
60         System.arraycopy(data, 0, mData, 0, data.length);
61     }
62 
63     /**
64      * Constructor.
65      *
66      * @param data the Text-string value
67      * @throws NullPointerException if Text-string value is null.
68      */
EncodedStringValue(byte[] data)69     public EncodedStringValue(byte[] data) {
70         this(CharacterSets.DEFAULT_CHARSET, data);
71     }
72 
EncodedStringValue(String data)73     public EncodedStringValue(String data) {
74         try {
75             mData = data.getBytes(CharacterSets.DEFAULT_CHARSET_NAME);
76             mCharacterSet = CharacterSets.DEFAULT_CHARSET;
77         } catch (UnsupportedEncodingException e) {
78             Log.e(TAG, "Default encoding must be supported.", e);
79         }
80     }
81 
82     /**
83      * Get Char-set value.
84      *
85      * @return the value
86      */
getCharacterSet()87     public int getCharacterSet() {
88         return mCharacterSet;
89     }
90 
91     /**
92      * Set Char-set value.
93      *
94      * @param charset the Char-set value
95      */
setCharacterSet(int charset)96     public void setCharacterSet(int charset) {
97         // TODO: CharSet needs to be validated against MIBEnum.
98         mCharacterSet = charset;
99     }
100 
101     /**
102      * Get Text-string value.
103      *
104      * @return the value
105      */
getTextString()106     public byte[] getTextString() {
107         byte[] byteArray = new byte[mData.length];
108 
109         System.arraycopy(mData, 0, byteArray, 0, mData.length);
110         return byteArray;
111     }
112 
113     /**
114      * Set Text-string value.
115      *
116      * @param textString the Text-string value
117      * @throws NullPointerException if Text-string value is null.
118      */
setTextString(byte[] textString)119     public void setTextString(byte[] textString) {
120         if(null == textString) {
121             throw new NullPointerException("EncodedStringValue: Text-string is null.");
122         }
123 
124         mData = new byte[textString.length];
125         System.arraycopy(textString, 0, mData, 0, textString.length);
126     }
127 
128     /**
129      * Convert this object to a {@link java.lang.String}. If the encoding of
130      * the EncodedStringValue is null or unsupported, it will be
131      * treated as iso-8859-1 encoding.
132      *
133      * @return The decoded String.
134      */
getString()135     public String getString()  {
136         if (CharacterSets.ANY_CHARSET == mCharacterSet) {
137             return new String(mData); // system default encoding.
138         } else {
139             try {
140                 String name = CharacterSets.getMimeName(mCharacterSet);
141                 return new String(mData, name);
142             } catch (UnsupportedEncodingException e) {
143             	if (LOCAL_LOGV) {
144             		Log.v(TAG, e.getMessage(), e);
145             	}
146             	try {
147                     return new String(mData, CharacterSets.MIMENAME_ISO_8859_1);
148                 } catch (UnsupportedEncodingException e2) {
149                     return new String(mData); // system default encoding.
150                 }
151             }
152         }
153     }
154 
155     /**
156      * Append to Text-string.
157      *
158      * @param textString the textString to append
159      * @throws NullPointerException if the text String is null
160      *                      or an IOException occured.
161      */
appendTextString(byte[] textString)162     public void appendTextString(byte[] textString) {
163         if(null == textString) {
164             throw new NullPointerException("Text-string is null.");
165         }
166 
167         if(null == mData) {
168             mData = new byte[textString.length];
169             System.arraycopy(textString, 0, mData, 0, textString.length);
170         } else {
171             ByteArrayOutputStream newTextString = new ByteArrayOutputStream();
172             try {
173                 newTextString.write(mData);
174                 newTextString.write(textString);
175             } catch (IOException e) {
176                 e.printStackTrace();
177                 throw new NullPointerException(
178                         "appendTextString: failed when write a new Text-string");
179             }
180 
181             mData = newTextString.toByteArray();
182         }
183     }
184 
185     /*
186      * (non-Javadoc)
187      * @see java.lang.Object#clone()
188      */
189     @Override
clone()190     public Object clone() throws CloneNotSupportedException {
191         super.clone();
192         int len = mData.length;
193         byte[] dstBytes = new byte[len];
194         System.arraycopy(mData, 0, dstBytes, 0, len);
195 
196         try {
197             return new EncodedStringValue(mCharacterSet, dstBytes);
198         } catch (Exception e) {
199             Log.e(TAG, "failed to clone an EncodedStringValue: " + this);
200             e.printStackTrace();
201             throw new CloneNotSupportedException(e.getMessage());
202         }
203     }
204 
205     /**
206      * Split this encoded string around matches of the given pattern.
207      *
208      * @param pattern the delimiting pattern
209      * @return the array of encoded strings computed by splitting this encoded
210      *         string around matches of the given pattern
211      */
split(String pattern)212     public EncodedStringValue[] split(String pattern) {
213         String[] temp = getString().split(pattern);
214         EncodedStringValue[] ret = new EncodedStringValue[temp.length];
215         for (int i = 0; i < ret.length; ++i) {
216             try {
217                 ret[i] = new EncodedStringValue(mCharacterSet,
218                         temp[i].getBytes());
219             } catch (NullPointerException e) {
220                 // Can't arrive here
221                 return null;
222             }
223         }
224         return ret;
225     }
226 
227     /**
228      * Extract an EncodedStringValue[] from a given String.
229      */
extract(String src)230     public static EncodedStringValue[] extract(String src) {
231         String[] values = src.split(";");
232 
233         ArrayList<EncodedStringValue> list = new ArrayList<EncodedStringValue>();
234         for (int i = 0; i < values.length; i++) {
235             if (values[i].length() > 0) {
236                 list.add(new EncodedStringValue(values[i]));
237             }
238         }
239 
240         int len = list.size();
241         if (len > 0) {
242             return list.toArray(new EncodedStringValue[len]);
243         } else {
244             return null;
245         }
246     }
247 
248     /**
249      * Concatenate an EncodedStringValue[] into a single String.
250      */
concat(EncodedStringValue[] addr)251     public static String concat(EncodedStringValue[] addr) {
252         StringBuilder sb = new StringBuilder();
253         int maxIndex = addr.length - 1;
254         for (int i = 0; i <= maxIndex; i++) {
255             sb.append(addr[i].getString());
256             if (i < maxIndex) {
257                 sb.append(";");
258             }
259         }
260 
261         return sb.toString();
262     }
263 
copy(EncodedStringValue value)264     public static EncodedStringValue copy(EncodedStringValue value) {
265         if (value == null) {
266             return null;
267         }
268 
269         return new EncodedStringValue(value.mCharacterSet, value.mData);
270     }
271 
encodeStrings(String[] array)272     public static EncodedStringValue[] encodeStrings(String[] array) {
273         int count = array.length;
274         if (count > 0) {
275             EncodedStringValue[] encodedArray = new EncodedStringValue[count];
276             for (int i = 0; i < count; i++) {
277                 encodedArray[i] = new EncodedStringValue(array[i]);
278             }
279             return encodedArray;
280         }
281         return null;
282     }
283 }
284