oidregister.java

ASN.1工具源代码,包括编译源码生成工具和各种基本类型构造类型的编解码实现代码

/**
 *
 * OIDRegister
 *
 * @author Ian Ibbotson ( [e-mail] )
 * @version $Id: OIDRegister.java,v 1.2 2001/01/18 14:48:05 ianibbo Exp $
 *
 * Copyright:   Copyright (C) 2000, Knowledge Integration Ltd (See the file LICENSE for details.)
 *
 */

package com.k_int.codec.util;

import java.util.Hashtable;
import java.io.StringWriter;
import com.k_int.codec.runtime.base_codec;

// The idea of this class is to map an OID onto a class that is capable of
// turning a Stream into some kind of structured object

public class OIDRegister
{
  private static OIDRegister me = null;
  private Hashtable register_by_name = new Hashtable();
  private Hashtable register_by_value = new Hashtable();

  public static OIDRegister getRegister()
  {
    if ( null == me )
        me = new OIDRegister();

    return me;
  }


  public void register_oid(OIDRegisterEntry entry)
  {
    // System.err.println("Registering entry "+entry.getName()+" with oid "+entry.getStringValue());
    register_by_name.put(entry.getName(), entry);
    register_by_value.put(entry.getStringValue(), entry);
  }

  public OIDRegisterEntry lookupByOID(String oid_as_string)
  {
    OIDRegisterEntry e = (OIDRegisterEntry)register_by_value.get(oid_as_string);
 
    if ( null != e )
    {
      return e;
    }

    return null;
  }

  public OIDRegisterEntry lookupByOID(int[] oid)
  {
    StringWriter sw = new StringWriter();

    sw.write("{");

    for ( int i = 0; i<oid.length; i++)
    {
      if ( i > 0 )
        sw.write(",");

      sw.write(""+oid[i]);
    }

    sw.write("}");

    // System.err.println("OID:"+sw.toString());

    return lookupByOID(sw.toString());
  }

  public int[] oidByName(String name)
  {
    OIDRegisterEntry o = lookupByName(name);

    if ( null != o )
    {
      return o.getValue();
    }
    
    return null;
  }

  public OIDRegisterEntry lookupByName(String name)
  {
    return (OIDRegisterEntry) register_by_name.get(name);
  }

}