StringInputStream


1   // Copyright (c) 2003-2007, Jodd Team (jodd.sf.net). All Rights Reserved.
2   
3   package jodd.io;
4   
5   import java.io.IOException  ;
6   
7   /**
8    * Simple InputStream subclass to fetch <b>all</b> bytes from a String.
9    * @see AsciiStringInputStream
10   */
11  public class StringInputStream {
12  
13      protected int strOffset = 0;
14      protected int charOffset = 0;
15      protected int available;
16      protected String   str;
17  
18      public StringInputStream(String   s) {
19          str = s;
20          available = s.length() << 1;
21      }
22  
23      public int read() throws IOException   {
24          if (available == 0) {
25              return -1;
26          }
27          available--;
28          char c = str.charAt(strOffset);
29          if (charOffset == 0) {
30              charOffset = 1;
31              return (c & 0x0000ff00) >> 8;
32          } else {
33              charOffset = 0;
34              strOffset++;
35              return c & 0x000000ff;
36          }
37      }
38  
39      public int available() throws IOException   {
40          return available;
41      }
42  
43  }
44

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