package org.bouncycastle.asn1;
/**
* Class for breaking up an OID into it's component tokens, ala
* java.util.StringTokenizer. We need this class as some of the
* lightweight Java environment don't support classes like
* StringTokenizer.
*/
public class OIDTokenizer
{
private String oid;
private int index;
/**
* Base constructor.
*
* @param oid the string representation of the OID.
*/
public OIDTokenizer(
String oid)
{
this.oid = oid;
this.index = 0;
}
/**
* Return whether or not there are more tokens in this tokenizer.
*
* @return true if there are more tokens, false otherwise.
*/
public boolean hasMoreTokens()
{
return (index != -1);
}
/**
* Return the next token in the underlying String.
*
* @return the next token.
*/
public String nextToken()
{
if (index == -1)
{
return null;
}
String token;
int end = oid.indexOf('.', index);
if (end == -1)
{
token = oid.substring(index);
index = -1;
return token;
}
token = oid.substring(index, end);
index = end + 1;
return token;
}
}