SyntaxException


1   // Copyright (c) 2003  Per M.A. Bothner.
2   // This is free software;  for terms and warranty disclaimer see ./COPYING.
3   
4   package gnu.text;
5   
6   /** Used to signal a non-recoverable (fatal) syntax error.
7    * Can also be used to signal a syntax error from embedded parsers,
8    * such as an <code>eval</code> or </code>execute</code> method,
9    * or well-formedness errors when reading an XML document.
10   */
11  
12  public class SyntaxException extends Exception  
13  {
14    /** If non-null, an extra one-line message printed before the messages.
15     * Can be used to provide extra context.  */
16    String   header;
17  
18    /** One or more error messages that triggered this exception. */
19    SourceMessages messages;
20  
21    public SyntaxException(SourceMessages messages)
22    {
23      this.messages = messages;
24    }
25  
26    public SyntaxException(String   header, SourceMessages messages)
27    {
28      this.header = header;
29      this.messages = messages;
30    }
31  
32    /** If non-null, an extra one-line message printed before the messages.
33     * Can be used to provide extra context.  */
34    public final String   getHeader() { return header; }
35  
36    /** Set the header returned by <code>getHeader</code>. */
37    public final void setHeader(String   header) { this.header = header; }
38  
39    public SourceMessages getMessages () { return messages; }
40  
41    public void printAll(java.io.PrintWriter   out, int max)
42    {
43      if (header != null)
44        out.println(header);
45      messages.printAll(out, max);
46    }
47  
48    public void clear()
49    {
50      messages.clear();
51    }
52  
53    public int maxToPrint = 10;
54  
55    public String   getMessage ()
56    {
57      StringBuffer   buffer = new StringBuffer   ();
58      if (header != null)
59        buffer.append(header);
60      int max = maxToPrint;
61      for (SourceError err = messages.firstError;
62       err != null && --max >= 0;  err = err.next)
63        {
64      buffer.append('\n');
65      buffer.append(err);
66        }
67      return buffer.toString();
68    }
69  }
70
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