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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.openhealthtools.ihe.utils;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
*
* Generates a OID following the IHE XDS format from:
* IHE IT Infrastructure Technical Framework, vol.2 (ITI TF-2):
* Transactions Revison 2.0, August 15,2005, pp234-236.
*
* This class generate a pretty unique UID
*
* @version $Revision: 1.6 $
* @author Glenn Deen
* @author Sarah Knoop
*/
public class OID {
/**
* Monotoniclaly increasing sequence number
*/
static int sequence=0;
static final String rootPrefix="1.2.820";
public static final int OID_MAX_LENGTH_DEFAULT = 256;
/**
* Creates an oid of the following format:
*
* OID = rootPrefix.Organization.ipaddr.time.sequence
*
* e.g 1.2.820.ORGANIZATION.123456790.123456789.1234
*
* If Orgnization is null, 99999 is used. Thr rootPrefix is set to "1.2.820".
* @param organization The ANSI issue Organizational ID (an INTEGER) for the
* organization to which the generated oid will be associated with
* @return A IHE Document UUID String (OID)
*/
public static String createOID(String organization)
{
sequence++;
byte[] hostip = new byte[4];
try {
InetAddress localhost;
localhost = InetAddress.getLocalHost();
hostip = localhost.getAddress();
} catch (UnknownHostException e) {
// Use the loopback as a default
hostip[0] = 127;
hostip[1] = 0;
hostip[2] = 0;
hostip[3] = 1;
}
// this MAC is real, it's from Glenn's wireless card!
int[] mac={0x00,0x02,0x8A,0x4A,0xFD,0xAC};
// to the the "fake" MAC address, munch this real MAC
// with the host IP address as follows..
for (int i=0; i< mac.length; i++)
mac[i] = (int)((hostip[ i % hostip.length] - mac[i]) * Math.random());
String macString = "";
for (int i=0; i < mac.length; i++)
macString = macString +format(mac[i]);
// macString is now mac.length*3 bytes or 18bytes long!
if (organization == null)
{
organization="99999";
}
String root = rootPrefix +"." + Integer.parseInt(organization);
String suffix = macString + "." + System.currentTimeMillis()+ "." + sequence;
int maxSuffix = 64-9; // allow room for "urn:UUID:"
if (suffix.length() > maxSuffix) suffix = suffix.substring(0,maxSuffix);
String result = root +"."+ suffix;
return result.replaceAll("[.]0",".1");
}
/**
* Creates an oid of the following format:
*
* OID = rootOID.ipaddr.time.sequence
*
* e.g 2.16.840.1.113883.3.18.123456790.123456789.1234
*
* If rootOid is null, the method createOID(null) is called and that
* result is returned. OID generated is subject to OID_MAX_LENGTH_DEFAULT
* @param rootOid The ANSI issued complete Organizational OID for
* a given insitution, system, or persion to which the generated OID will
* be associated.
* @return A IHE Document UUID String (OID)
*/
public static String createOIDGivenRoot(String rootOid)
{
return createOIDGivenRoot(rootOid,OID_MAX_LENGTH_DEFAULT);
}
/**
* Creates an oid of the following format:
*
* OID = rootOID.ipaddr.time.sequence
*
* e.g 2.16.840.1.113883.3.18.123456790.123456789.1234
*
* If rootOid is null, the method createOID(null) is called and that
* result is returned. OID generated is 64 chars in length
* @param rootOid The ANSI issued complete Organizational OID for
* a given insitution, system, or persion to which the generated OID will
* be associated.
* @return A IHE Document UUID String (OID)
*/
public static String create64CharOIDGivenRoot(String rootOid)
{
return createOIDGivenRoot(rootOid,64);
}
/**
* Creates an oid of the following format:
*
* OID = rootOID.ipaddr.time.sequence
*
* e.g 2.16.840.1.113883.3.18.123456790.123456789.1234
*
* If rootOid is null, the method createOID(null) is called and that
* result is returned. OID generated is 256 chars in length
* @param rootOid The ANSI issued complete Organizational OID for
* a given insitution, system, or persion to which the generated OID will
* be associated.
* @return A IHE Document UUID String (OID)
*/
public static String create256CharOIDGivenRoot(String rootOid)
{
return createOIDGivenRoot(rootOid,256);
}
/**
* Creates an oid of the following format:
*
* OID = rootOID.ipaddr.time.sequence
*
* e.g 2.16.840.1.113883.3.18.123456790.123456789.1234
*
* If rootOid is null, the method createOID(null) is called and that
* result is returned.
* @param rootOid The ANSI issued complete Organizational OID for
* a given insitution, system, or persion to which the generated OID will
* be associated.
* @param maxLength The maximum length of string for the OID
* @return OID subject to the max length
*/
public static String createOIDGivenRoot(String rootOid, int maxLength)
{
if(rootOid == null){
return createOID(rootOid);
}
sequence++;
byte[] hostip = new byte[4];
try {
InetAddress localhost;
localhost = InetAddress.getLocalHost();
hostip = localhost.getAddress();
} catch (UnknownHostException e) {
// Use the loopback as a default
hostip[0] = 127;
hostip[1] = 0;
hostip[2] = 0;
hostip[3] = 1;
}
// this MAC is real, it's from Glenn's wireless card!
int[] mac={0x00,0x02,0x8A,0x4A,0xFD,0xAC};
// to the the "fake" MAC address, munch this real MAC
// with the host IP address as follows..
for (int i=0; i< mac.length; i++)
mac[i] = (int)((hostip[ i % hostip.length] - mac[i]) * Math.random());
String macString = "";
for (int i=0; i < mac.length; i++)
macString = macString +format(mac[i]);
// macString is now mac.length*3 bytes or 18bytes long!
String root = rootOid;
String suffix = macString + "." + System.currentTimeMillis()+ "." + sequence;
int maxSuffix = maxLength-9; // allow room for "urn:UUID:"
maxSuffix = maxSuffix - root.length() - 1; // adjust for root oid length
if (maxSuffix < 0) maxSuffix = 0;
if (suffix.length() > maxSuffix) suffix = suffix.substring(0,maxSuffix);
String result = root +"."+ suffix;
if (result.charAt(result.length()-1) == '.') {
result = result.substring(0,result.length()-1);
}
return result.replaceAll("[.]0",".1");
}
/**
* Returns the byte as a three character String, with any leader zeros
* added. Negative values are made positive.
* Range: 0-127
* @param b
* @return
*/
// private static String format(byte b)
// {
// StringBuffer sb= new StringBuffer();
// if (b < 0) b = (byte)(b * -1);
// if ( b < 10 ) {
// sb.append("00");
// }
// else if ( b < 100)
// {
// sb.append('0');
// }
// sb.append(b);
// return sb.toString();
// }
/**
* Returns a String of lenght 3, with the value of i
* between 0 and 255, and 0 prefixed if needed.
* negative i's are made positive.
* i's > 255 are reduced to 255.
* range: 0-255
* @param i
* @return
*/
private static String format(int i)
{
i = Math.abs(i);
StringBuilder sb = new StringBuilder(3);
if (i < 10) sb.append("0");
if (i < 100) sb.append("0");
sb.append(i);
return sb.toString();
}
public static void main (String... argv)
{
System.out.println(" 1 2 3 4 5 6 x");
System.out.println("123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_");
for (int i=0; i<15; i++)
System.out.println(OID.createOID(null));
System.out.println();
System.out.println("123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_");
for (int i=0; i<15; i++)
System.out.println(OID.createOIDGivenRoot("2.16.840.1.113883.3.18", 36));
}
}
