01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */package org.apache.geronimo.crypto.asn1;
17:
18: /**
19: * class for breaking up an OID into it's component tokens, ala
20: * java.util.StringTokenizer. We need this class as some of the
21: * lightweight Java environment don't support classes like
22: * StringTokenizer.
23: */
24: public class OIDTokenizer {
25: private String oid;
26: private int index;
27:
28: public OIDTokenizer(String oid) {
29: this .oid = oid;
30: this .index = 0;
31: }
32:
33: public boolean hasMoreTokens() {
34: return (index != -1);
35: }
36:
37: public String nextToken() {
38: if (index == -1) {
39: return null;
40: }
41:
42: String token;
43: int end = oid.indexOf('.', index);
44:
45: if (end == -1) {
46: token = oid.substring(index);
47: index = -1;
48: return token;
49: }
50:
51: token = oid.substring(index, end);
52:
53: index = end + 1;
54: return token;
55: }
56: }
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