org.apache.commons.ssl.asn1.OIDTokenizer Maven / Gradle / Ivy

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package org.apache.commons.ssl.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;
    }
}