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package port.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;

	public OIDTokenizer(String oid) {
		this.oid = oid;
		this.index = 0;
	}

	public boolean hasMoreTokens() {
		return (index != -1);
	}

	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;
	}
}




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