src/main/java/eu/svjatoslav/commons/string/tokenizer/Terminator.java

   1 /*
   2  * Svjatoslav Commons - shared library of common functionality. Author: Svjatoslav Agejenko.
   3  * This project is released under Creative Commons Zero (CC0) license.
   4  */
   5 package eu.svjatoslav.commons.string.tokenizer;
   6
   7 public class Terminator {
   8
   9     public final String startSequence;
  10     public final String endSequence;
  11     public final TerminationStrategy termination;
  12
  13     public Terminator(final String startSequence, TerminationStrategy termination) {
  14         this.startSequence = startSequence;
  15         this.endSequence = null;
  16         this.termination = termination;
  17     }
  18
  19     public Terminator(final String startSequence, final String endSequence, TerminationStrategy termination) {
  20         this.startSequence = startSequence;
  21         this.endSequence = endSequence;
  22         this.termination = termination;
  23     }
  24
  25     public boolean matches(String source, int index) {
  26         // boundary check
  27         if (source.length() < (index + startSequence.length()))
  28             return false;
  29
  30         // match check
  31         for (int i = 0; i < startSequence.length(); i++)
  32             if (startSequence.charAt(i) != source.charAt(index + i))
  33                 return false;
  34
  35         return true;
  36     }
  37
  38     public boolean hasEndSequence() {
  39         return endSequence != null;
  40     }
  41
  42     @Override
  43     public String toString() {
  44         return "Terminator{" +
  45                 "startSequence='" + startSequence + '\'' +
  46                 ", endSequence='" + endSequence + '\'' +
  47                 ", termination=" + termination +
  48                 '}';
  49     }
  50
  51     public enum TerminationStrategy {
  52         PRESERVE,
  53         DROP
  54     }
  55 }