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Viewing changes to src/org/bouncycastle/asn1/x500/style/X500NameTokenizer.java

  • Committer: Brian Thomason
  • Date: 2011-12-20 17:20:32 UTC
  • Revision ID: brian.thomason@canonical.com-20111220172032-rdtm13jgdxtksacr
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src/org/bouncycastle/asn1/x500/style/X500NameTokenizer.java
 
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package org.bouncycastle.asn1.x500.style;
 
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/**
 
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 * class for breaking up an X500 Name into it's component tokens, ala
 
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 * java.util.StringTokenizer. We need this class as some of the
 
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 * lightweight Java environment don't support classes like
 
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 * StringTokenizer.
 
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 */
 
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class X500NameTokenizer
 
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{
 
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    private String          value;
 
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    private int             index;
 
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    private char            seperator;
 
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    private StringBuffer    buf = new StringBuffer();
 
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    public X500NameTokenizer(
 
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        String  oid)
 
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    {
 
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        this(oid, ',');
 
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    }
 
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    public X500NameTokenizer(
 
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        String  oid,
 
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        char    seperator)
 
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    {
 
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        this.value = oid;
 
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        this.index = -1;
 
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        this.seperator = seperator;
 
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    }
 
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    public boolean hasMoreTokens()
 
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    {
 
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        return (index != value.length());
 
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    }
 
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    public String nextToken()
 
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    {
 
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        if (index == value.length())
 
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        {
 
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            return null;
 
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        }
 
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        int     end = index + 1;
 
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        boolean quoted = false;
 
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        boolean escaped = false;
 
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        buf.setLength(0);
 
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        while (end != value.length())
 
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        {
 
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            char    c = value.charAt(end);
 
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            if (c == '"')
 
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            {
 
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                if (!escaped)
 
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                {
 
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                    quoted = !quoted;
 
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                }
 
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                else
 
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                {
 
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                    buf.append(c);
 
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                }
 
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                escaped = false;
 
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            }
 
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            else
 
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            {
 
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                if (escaped || quoted)
 
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                {
 
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                    if (c == '#' && buf.charAt(buf.length() - 1) == '=')
 
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                    {
 
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                        buf.append('\\');
 
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                    }
 
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                    else if (c == '+' && seperator != '+')
 
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                    {
 
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                        buf.append('\\');
 
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                    }
 
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                    buf.append(c);
 
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                    escaped = false;
 
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                }
 
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                else if (c == '\\')
 
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                {
 
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                    escaped = true;
 
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                }
 
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                else if (c == seperator)
 
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                {
 
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                    break;
 
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                }
 
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                else
 
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                {
 
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                    buf.append(c);
 
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                }
 
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            }
 
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            end++;
 
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        }
 
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        index = end;
 
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        return buf.toString().trim();
 
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    }
 
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}