StringTokenizer.cs :  » Template-Engines » NVelocity » Commons » Collections » C# / CSharp Open Source

using System;
using System.Collections;

namespace Commons.Collections{

    public class StringTokenizer {
  private System.Collections.ArrayList elements;
  private string source;
  //The tokenizer uses the default delimiter set: the space character, the tab character, the newline character, and the carriage-return character
  private string delimiters = " \t\n\r";

  public StringTokenizer(string source) {
      this.elements = new ArrayList();
      this.elements.AddRange(source.Split(this.delimiters.ToCharArray()));
      this.RemoveEmptyStrings();
      this.source = source;
  }

  public StringTokenizer(string source, string delimiters) {
      this.elements = new ArrayList();
      this.delimiters = delimiters;
      this.elements.AddRange(source.Split(this.delimiters.ToCharArray()));
      this.RemoveEmptyStrings();
      this.source = source;
  }

  public int Count {
      get {
    return (this.elements.Count);
      }
  }

  public bool HasMoreTokens() {
      return (this.elements.Count > 0);
  }

  public string NextToken() {
      string result;
      if (source == "") {
    throw new System.Exception();
      } else {
    this.elements = new ArrayList();
    this.elements.AddRange(this.source.Split(delimiters.ToCharArray()));
    RemoveEmptyStrings();
    result = (string) this.elements[0];
    this.elements.RemoveAt(0);
    this.source = this.source.Replace(result,"");
    this.source = this.source.TrimStart(this.delimiters.ToCharArray());
    return result;
      }
  }

  public string NextToken(string delimiters) {
      this.delimiters = delimiters;
      return NextToken();
  }

  private void RemoveEmptyStrings() {
      //VJ++ does not treat empty strings as tokens
      for (int index=0; index < this.elements.Count; index++)
    if ((string)this.elements[index]== "") {
        this.elements.RemoveAt(index);
        index--;
    }
  }

    }
}