Name: dfC67450 Date: 03/18/98



Object[] java.text.MessageFormat.parse(String text, ParsePosition pp)
incorrectly sets error index of ParsePosition parameter. It must set
this index to the starting offset of the sub-patterns that the string is
comparing with. But for some incorrectly formatted input strings
it sets this index to -1 as well as for correctly formatted ones.

Javadoc says about MessageFormat.parse(String, ParsePosition)
   * When the parse fails, use ParsePosition.getErrorIndex() to find out
   * where in the string did the parsing failed. The returned error
   * index is the starting offset of the sub-patterns that the string
   * is comparing with. For example, if the parsing string "AAA {0} BBB"
   * is comparing against the pattern "AAD {0} BBB", the error index is
   * 0.

about ParsePosition.getErrorIndex() :
   * Retrieve the index at which an error occurred, or -1 if the error
   * index has not been set.

Here is the test demonstrating the bug:

-----------------TestMF.java------------------------
import java.text.*;

public class TestMF {
    public static void main (String args[]){
      MessageFormat mf = new MessageFormat("pattern");
      String texts[] = {"pattern", "pat", "1234"};
      System.out.println("pattern: \"" + mf.toPattern() + "\"");
      for (int i = 0; i < texts.length; i++) {
        ParsePosition pp = new ParsePosition(0);
        Object[] objs = mf.parse(texts[i], pp);
        System.out.print(" text for parsing: \"" + texts[i] + "\"");
        if (objs == null)
          System.out.println(" (incorrectly formatted string)");
        else
          System.out.println(" (correctly formatted string)");
        System.out.println(" error index: " + pp.getErrorIndex());
        System.out.println();
      }
    }
}
---------Output from the test ---------------------
pattern: "pattern"
  text for parsing: "pattern" (correctly formatted string)
    error index: -1
 
  text for parsing: "pat" (incorrectly formatted string)
    error index: -1
 
  text for parsing: "1234" (incorrectly formatted string)
    error index: -1
--------------------------------------------------

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