package gov.nist.sip.instantmessaging;import java.io.*;import java.util.*;import javax.sip.*;import javax.sip.message.*; import javax.sip.header.*;import javax.sip.address.*;/** Utilities for the IM client.**@version  JAIN-SIP-1.1**@author Olvier Deruelle <deruelle@nist.gov>  <br/>*@author M. Ranganathan <mranga@nist.gov> <br/>*<a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>**/public class IMUtilities {       /** Utility method for writing in a file       * @param outFile: file to write       * @param text String to set       */    public static void writeFile(String outFile, String text) {        try {                        File file=new File(outFile);                        if (file.exists()) {                FileWriter fileWriter = new FileWriter(outFile,false);                PrintWriter pw = new PrintWriter(fileWriter,true);                                pw.write(text);                                pw.close();                fileWriter.close();            }            else DebugIM.println("DebugIM, writeFile(),  unable to write, the file:"+                    outFile +" is missing.");        }        catch (Exception e) {            DebugIM.println("DebugIM, writeFile(),  unable to write, the file:"+                    outFile +" is missing.");            e.printStackTrace();        }    }        public static URI getCleanUri(URI uri) {        if (uri instanceof SipURI) {            SipURI sipURI=(SipURI)uri.clone();                        Iterator iterator=sipURI.getParameterNames();            while (iterator!=null && iterator.hasNext()) {                String name=(String)iterator.next();                sipURI.removeParameter(name);            }            return  sipURI;        }        else return  uri;    }            public static  String getKey(Message message,String header) {        try{            URI uri=null;            if (header.equals("From") ) {                FromHeader fromHeader=(FromHeader)message.getHeader(FromHeader.NAME);                Address fromAddress=fromHeader.getAddress();                uri=fromAddress.getURI();            }            else                if (header.equals("To") ) {                    ToHeader toHeader=(ToHeader)message.getHeader(ToHeader.NAME);                    Address toAddress=toHeader.getAddress();                    uri=toAddress.getURI();                }                else                    if (header.equals("Request-URI") ) {                        uri=                        ((Request)message).getRequestURI();                    }                    else {                        return null;                    }                        // URI parameters MUST be removed:            URI cleanedUri = getCleanUri(uri);                        String  keyresult=cleanedUri.toString();            keyresult=keyresult.toLowerCase();            DebugIM.println("DEBUG, IMUtilities, getKey(), the key is: " +keyresult);            return keyresult;        }        catch(Exception e) {            e.printStackTrace();            return null;        }    }    }