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

   1 /*
   2  * Svjatoslav Commons - shared library of common functionality.
   3  * Copyright ©2012-2020, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 3 of the GNU Lesser General Public License
   7  * or later as published by the Free Software Foundation.
   8  */
   9
  10 package eu.svjatoslav.commons.string.tokenizer;
  11
  12 public class Terminator {
  13
  14     public final String startSequence;
  15     public final String endSequence;
  16     public final TerminationStrategy termination;
  17
  18     public Terminator(final String startSequence, TerminationStrategy termination) {
  19         this.startSequence = startSequence;
  20         this.endSequence = null;
  21         this.termination = termination;
  22     }
  23
  24     public Terminator(final String startSequence, final String endSequence, TerminationStrategy termination) {
  25         this.startSequence = startSequence;
  26         this.endSequence = endSequence;
  27         this.termination = termination;
  28     }
  29
  30     public boolean matches(String source, int index) {
  31         // boundary check
  32         if (source.length() < (index + startSequence.length()))
  33             return false;
  34
  35         // match check
  36         for (int i = 0; i < startSequence.length(); i++)
  37             if (startSequence.charAt(i) != source.charAt(index + i))
  38                 return false;
  39
  40         return true;
  41     }
  42
  43     public boolean hasEndSequence() {
  44         return endSequence != null;
  45     }
  46
  47     @Override
  48     public String toString() {
  49         return "Terminator{" +
  50                 "startSequence='" + startSequence + '\'' +
  51                 ", endSequence='" + endSequence + '\'' +
  52                 ", termination=" + termination +
  53                 '}';
  54     }
  55
  56     public enum TerminationStrategy {
  57         PRESERVE,
  58         DROP
  59     }
  60 }