//    trans2a.java by Steven R. Brandt
//    <p>
//    An example file distributed with com.stevesoft.pat
//    and com.stevesoft.pat.apps
//    <p>
//    This software comes without express or implied warranty.
//    No claim is made about the suitability of this software for
//    any purpose and neither I nor SteveSoft shall be liable for
//    damages suffered by the user of this software.
import com.stevesoft.pat.*;
import java.io.*;

public class trans2a {
  public static void main(String[] args) {
    // We start as in trans.java, with something
    // that transforms the names of the seasons.
    Transformer t = new Transformer(true);
    t.add(new String[] {
       "s/\\bspring\\b/summer/",
       "s/\\bsummer\\b/fall/",
       "s/\\bfall\\b/winter/",
       "s/\\bwinter\\b/spring/",
    });

    // But now we decide that we want this to stop
    // happening after the symbol "!" occurs in the text.
    // After that word occurs, we want the replacements to stop
    // occuring.  We can do this by calling the special rule
    // ${ABORT}.
    t.add("s/!/${ABORT}/");
    System.out.println(t.replaceAll("spring, summer, ! fall"));

    // However, this may not be quite what we want.  Perhaps
    // we only want to stop the substitutions temporarily -- say
    // after the word off, but start them again after the word on.
    // Is there a way to change which thing we're using to match
    // and replace on the fly?  Yes...
    ReplaceRule.define("season_is_on",t);
    ReplaceRule.define("season_is_off",new Regex("\\bon\\b","$&${=season_is_on}"));
    t.add("s/\\boff\\b/$&${=season_is_off}/");
    System.out.println(t.replaceAll("spring, summer, off, fall, winter, on, fall"));
  }
}