package liquibase.util;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 /**

  * Check that a text matches an array of regular expressions.<br/>

  * 

  * @author lujop

  */

 public class RegexMatcher {

     private String text;

     private Pattern[] patterns;

     private boolean allMatched;

     /**

      * Constructs the matcher

      * 

      * @param text

      *            Text to search for mathces

      * @param regexToMatch

      *            Regex to match

      */

     public RegexMatcher(String text, String[] regexToMatch) {

         assert text != null && regexToMatch != null;

         this.text = text;

         patterns = new Pattern[regexToMatch.length];

         for (int i = 0; i < regexToMatch.length; i++) {

             patterns[i] = Pattern.compile(regexToMatch[i], Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);

         }

         allMatched = checkMatchingInSequentialOrder();

     }

     private boolean checkMatchingInSequentialOrder() {

         int index = 0;

         for (Pattern p : patterns) {

             Matcher m = p.matcher(text.substring(index));

             if (!m.find())

                 return false;

             else

                 index += m.end();

         }

         return true;

     }

     public boolean allMatchedInSequentialOrder() {

         return allMatched;

     }

 }