Regex question

[Paul Gearon]

Hi,

I've been having some (apparently) odd behavior with regular
expressions. Can anyone please tell me if the following program should
work as I am seeing?
---
import org.apache.xerces.impl.xpath.regex.RegularExpression;;

public class ReTest {
  public static void main(String[] args) {
    String s = "Another test";
    String p1 = "foo";
    String p2 = "foo.*test";

    RegularExpression re = new RegularExpression(p1);
    print(s, p1, re.matches(s));
    re.setPattern(p2);
    print(s, p2, re.matches(s));
    re = new RegularExpression(p2);
    print(s, p2, re.matches(s));
  }

  static void print(String str, String pattern, boolean match) {
    System.out.print("Pattern '" + pattern);
    if (match) System.out.print("' matches '");
    else System.out.print("' does not match '");
    System.out.println(str + "'");
  }
}
---

The output I expect to see is:
  Pattern 'foo' does not match 'Another test'
  Pattern 'foo.*test' does not match 'Another test'
  Pattern 'foo.*test' does not match 'Another test'

The output I actually see is:
  Pattern 'foo' does not match 'Another test'
  Pattern 'foo.*test' matches 'Another test'
  Pattern 'foo.*test' does not match 'Another test'

In other words, setPattern() is not working the way I expect it to. Is
this right?

Thanks in advance,
Paul Gearon

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