001package org.apache.commons.ssl.org.bouncycastle.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 */ 009public class OIDTokenizer 010{ 011 private String oid; 012 private int index; 013 014 public OIDTokenizer( 015 String oid) 016 { 017 this.oid = oid; 018 this.index = 0; 019 } 020 021 public boolean hasMoreTokens() 022 { 023 return (index != -1); 024 } 025 026 public String nextToken() 027 { 028 if (index == -1) 029 { 030 return null; 031 } 032 033 String token; 034 int end = oid.indexOf('.', index); 035 036 if (end == -1) 037 { 038 token = oid.substring(index); 039 index = -1; 040 return token; 041 } 042 043 token = oid.substring(index, end); 044 045 index = end + 1; 046 return token; 047 } 048}