001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019 package org.apache.geronimo.util.asn1.x509; 020 021 /** 022 * class for breaking up an X500 Name into it's component tokens, ala 023 * java.util.StringTokenizer. We need this class as some of the 024 * lightweight Java environment don't support classes like 025 * StringTokenizer. 026 */ 027 public class X509NameTokenizer 028 { 029 private String value; 030 private int index; 031 private char seperator; 032 private StringBuffer buf = new StringBuffer(); 033 034 public X509NameTokenizer( 035 String oid) 036 { 037 this(oid, ','); 038 } 039 040 public X509NameTokenizer( 041 String oid, 042 char seperator) 043 { 044 this.value = oid; 045 this.index = -1; 046 this.seperator = seperator; 047 } 048 049 public boolean hasMoreTokens() 050 { 051 return (index != value.length()); 052 } 053 054 public String nextToken() 055 { 056 if (index == value.length()) 057 { 058 return null; 059 } 060 061 int end = index + 1; 062 boolean quoted = false; 063 boolean escaped = false; 064 065 buf.setLength(0); 066 067 while (end != value.length()) 068 { 069 char c = value.charAt(end); 070 071 if (c == '"') 072 { 073 if (!escaped) 074 { 075 quoted = !quoted; 076 } 077 else 078 { 079 buf.append(c); 080 } 081 escaped = false; 082 } 083 else 084 { 085 if (escaped || quoted) 086 { 087 buf.append(c); 088 escaped = false; 089 } 090 else if (c == '\\') 091 { 092 escaped = true; 093 } 094 else if (c == seperator) 095 { 096 break; 097 } 098 else 099 { 100 buf.append(c); 101 } 102 } 103 end++; 104 } 105 106 index = end; 107 return buf.toString().trim(); 108 } 109 }