001 package org.apache.commons.ssl.asn1; 002 003 /** 004 * class for breaking up an OID into it's component tokens, ala 005 * java.util.StringTokenizer. We need this class as some of the 006 * lightweight Java environment don't support classes like 007 * StringTokenizer. 008 */ 009 public class OIDTokenizer { 010 private String oid; 011 private int index; 012 013 public OIDTokenizer( 014 String oid) { 015 this.oid = oid; 016 this.index = 0; 017 } 018 019 public boolean hasMoreTokens() { 020 return (index != -1); 021 } 022 023 public String nextToken() { 024 if (index == -1) { 025 return null; 026 } 027 028 String token; 029 int end = oid.indexOf('.', index); 030 031 if (end == -1) { 032 token = oid.substring(index); 033 index = -1; 034 return token; 035 } 036 037 token = oid.substring(index, end); 038 039 index = end + 1; 040 return token; 041 } 042 }