Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.util; |
| 20 | import java.io.IOException; |
| 21 | import java.io.OutputStream; |
| 22 | import java.io.OutputStreamWriter; |
| 23 | import java.io.Writer; |
| 24 | |
| 25 | |
| 26 | /* ------------------------------------------------------------ */ |
| 27 | /** Byte Array ISO 8859 writer. |
| 28 | * This class combines the features of a OutputStreamWriter for |
| 29 | * ISO8859 encoding with that of a ByteArrayOutputStream. It avoids |
| 30 | * many inefficiencies associated with these standard library classes. |
| 31 | * It has been optimized for standard ASCII characters. |
| 32 | * |
| 33 | * |
| 34 | */ |
| 35 | public class ByteArrayISO8859Writer extends Writer |
| 36 | { |
| 37 | private byte[] _buf; |
| 38 | private int _size; |
| 39 | private ByteArrayOutputStream2 _bout=null; |
| 40 | private OutputStreamWriter _writer=null; |
| 41 | private boolean _fixed=false; |
| 42 | |
| 43 | /* ------------------------------------------------------------ */ |
| 44 | /** Constructor. |
| 45 | */ |
| 46 | public ByteArrayISO8859Writer() |
| 47 | { |
| 48 | _buf=new byte[2048]; |
| 49 | } |
| 50 | |
| 51 | /* ------------------------------------------------------------ */ |
| 52 | /** Constructor. |
| 53 | * @param capacity Buffer capacity |
| 54 | */ |
| 55 | public ByteArrayISO8859Writer(int capacity) |
| 56 | { |
| 57 | _buf=new byte[capacity]; |
| 58 | } |
| 59 | |
| 60 | /* ------------------------------------------------------------ */ |
| 61 | public ByteArrayISO8859Writer(byte[] buf) |
| 62 | { |
| 63 | _buf=buf; |
| 64 | _fixed=true; |
| 65 | } |
| 66 | |
| 67 | /* ------------------------------------------------------------ */ |
| 68 | public Object getLock() |
| 69 | { |
| 70 | return lock; |
| 71 | } |
| 72 | |
| 73 | /* ------------------------------------------------------------ */ |
| 74 | public int size() |
| 75 | { |
| 76 | return _size; |
| 77 | } |
| 78 | |
| 79 | /* ------------------------------------------------------------ */ |
| 80 | public int capacity() |
| 81 | { |
| 82 | return _buf.length; |
| 83 | } |
| 84 | |
| 85 | /* ------------------------------------------------------------ */ |
| 86 | public int spareCapacity() |
| 87 | { |
| 88 | return _buf.length-_size; |
| 89 | } |
| 90 | |
| 91 | /* ------------------------------------------------------------ */ |
| 92 | public void setLength(int l) |
| 93 | { |
| 94 | _size=l; |
| 95 | } |
| 96 | |
| 97 | /* ------------------------------------------------------------ */ |
| 98 | public byte[] getBuf() |
| 99 | { |
| 100 | return _buf; |
| 101 | } |
| 102 | |
| 103 | /* ------------------------------------------------------------ */ |
| 104 | public void writeTo(OutputStream out) |
| 105 | throws IOException |
| 106 | { |
| 107 | out.write(_buf,0,_size); |
| 108 | } |
| 109 | |
| 110 | /* ------------------------------------------------------------ */ |
| 111 | public void write(char c) |
| 112 | throws IOException |
| 113 | { |
| 114 | ensureSpareCapacity(1); |
| 115 | if (c>=0&&c<=0x7f) |
| 116 | _buf[_size++]=(byte)c; |
| 117 | else |
| 118 | { |
| 119 | char[] ca ={c}; |
| 120 | writeEncoded(ca,0,1); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | /* ------------------------------------------------------------ */ |
| 125 | @Override |
| 126 | public void write(char[] ca) |
| 127 | throws IOException |
| 128 | { |
| 129 | ensureSpareCapacity(ca.length); |
| 130 | for (int i=0;i<ca.length;i++) |
| 131 | { |
| 132 | char c=ca[i]; |
| 133 | if (c>=0&&c<=0x7f) |
| 134 | _buf[_size++]=(byte)c; |
| 135 | else |
| 136 | { |
| 137 | writeEncoded(ca,i,ca.length-i); |
| 138 | break; |
| 139 | } |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /* ------------------------------------------------------------ */ |
| 144 | @Override |
| 145 | public void write(char[] ca,int offset, int length) |
| 146 | throws IOException |
| 147 | { |
| 148 | ensureSpareCapacity(length); |
| 149 | for (int i=0;i<length;i++) |
| 150 | { |
| 151 | char c=ca[offset+i]; |
| 152 | if (c>=0&&c<=0x7f) |
| 153 | _buf[_size++]=(byte)c; |
| 154 | else |
| 155 | { |
| 156 | writeEncoded(ca,offset+i,length-i); |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* ------------------------------------------------------------ */ |
| 163 | @Override |
| 164 | public void write(String s) |
| 165 | throws IOException |
| 166 | { |
| 167 | if (s==null) |
| 168 | { |
| 169 | write("null",0,4); |
| 170 | return; |
| 171 | } |
| 172 | |
| 173 | int length=s.length(); |
| 174 | ensureSpareCapacity(length); |
| 175 | for (int i=0;i<length;i++) |
| 176 | { |
| 177 | char c=s.charAt(i); |
| 178 | if (c>=0x0&&c<=0x7f) |
| 179 | _buf[_size++]=(byte)c; |
| 180 | else |
| 181 | { |
| 182 | writeEncoded(s.toCharArray(),i,length-i); |
| 183 | break; |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | /* ------------------------------------------------------------ */ |
| 189 | @Override |
| 190 | public void write(String s,int offset, int length) |
| 191 | throws IOException |
| 192 | { |
| 193 | ensureSpareCapacity(length); |
| 194 | for (int i=0;i<length;i++) |
| 195 | { |
| 196 | char c=s.charAt(offset+i); |
| 197 | if (c>=0&&c<=0x7f) |
| 198 | _buf[_size++]=(byte)c; |
| 199 | else |
| 200 | { |
| 201 | writeEncoded(s.toCharArray(),offset+i,length-i); |
| 202 | break; |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /* ------------------------------------------------------------ */ |
| 208 | private void writeEncoded(char[] ca,int offset, int length) |
| 209 | throws IOException |
| 210 | { |
| 211 | if (_bout==null) |
| 212 | { |
| 213 | _bout = new ByteArrayOutputStream2(2*length); |
| 214 | _writer = new OutputStreamWriter(_bout,StringUtil.__ISO_8859_1); |
| 215 | } |
| 216 | else |
| 217 | _bout.reset(); |
| 218 | _writer.write(ca,offset,length); |
| 219 | _writer.flush(); |
| 220 | ensureSpareCapacity(_bout.getCount()); |
| 221 | System.arraycopy(_bout.getBuf(),0,_buf,_size,_bout.getCount()); |
| 222 | _size+=_bout.getCount(); |
| 223 | } |
| 224 | |
| 225 | /* ------------------------------------------------------------ */ |
| 226 | @Override |
| 227 | public void flush() |
| 228 | {} |
| 229 | |
| 230 | /* ------------------------------------------------------------ */ |
| 231 | public void resetWriter() |
| 232 | { |
| 233 | _size=0; |
| 234 | } |
| 235 | |
| 236 | /* ------------------------------------------------------------ */ |
| 237 | @Override |
| 238 | public void close() |
| 239 | {} |
| 240 | |
| 241 | /* ------------------------------------------------------------ */ |
| 242 | public void destroy() |
| 243 | { |
| 244 | _buf=null; |
| 245 | } |
| 246 | |
| 247 | /* ------------------------------------------------------------ */ |
| 248 | public void ensureSpareCapacity(int n) |
| 249 | throws IOException |
| 250 | { |
| 251 | if (_size+n>_buf.length) |
| 252 | { |
| 253 | if (_fixed) |
| 254 | throw new IOException("Buffer overflow: "+_buf.length); |
| 255 | byte[] buf = new byte[(_buf.length+n)*4/3]; |
| 256 | System.arraycopy(_buf,0,buf,0,_size); |
| 257 | _buf=buf; |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | |
| 262 | /* ------------------------------------------------------------ */ |
| 263 | public byte[] getByteArray() |
| 264 | { |
| 265 | byte[] data=new byte[_size]; |
| 266 | System.arraycopy(_buf,0,data,0,_size); |
| 267 | return data; |
| 268 | } |
| 269 | |
| 270 | } |
| 271 | |
| 272 | |