import java.io.*;
import java.util.*;

/* Practical Exception Handling Example

This is an example that opens and reads from a data file, storing information into
an ArrayList and a HashMap as it stored the information it needs for a report.

Exceptions used within the main code to trap program runs where no input file is
specified, or the input file named doesn't exist or can't be read. And we've also
used our own exception if our call to "getCountry" isn't going to be able to identify
tehe origin of the request. */

public class Bikini {

        public static String getCountry(String Ip) {

                // Throws an exception if cannot resolve to a country
                // (IRL - use this to call www.maxmind.com's database!)

                // Failure - throw an exception rather than returning a value

                if (! Ip.startsWith("66")) {
                        ArrayIndexOutOfBoundsException fred = new
                                ArrayIndexOutOfBoundsException("Dunno, Mate!");
                        throw fred;
                }

                // Success - return a value

                return "Potential Googleland";
                }

        public static void main (String [] args) {

                int countplace = 0, countlines = 0;
                int iptop; String RemoteIp;

                BufferedReader Suck = null;

// Open the input file - deal with any issues if you can't

                try {
                        Suck = new BufferedReader(new FileReader(args[0]));
                        }
                catch (ArrayIndexOutOfBoundsException e) {
                        // Failed to specify file name
                        System.err.println ("Hey - where should I look?");
                        System.exit(1);
                        }
                catch (Exception e) {
                        // Name given doesn't map to a file that can be read
                        System.err.println ("Oh Sh..dear");
                        System.err.println ("Contact the support team: " + e);
                        System.exit(1);
                        }

                String Stuff;

                // Read and store all Swindon interest by IP

                ArrayList<String> Iprecords = new ArrayList<String>();

                // Also store a count of visits from each different IP

                HashMap Counters = new HashMap();

                try { // In case data stream breaks
                while ((Stuff = Suck.readLine()) != null) {
                        countlines ++;
                        iptop = Stuff.indexOf(" ");
                        RemoteIp = Stuff.substring(0,iptop);
                        if (Stuff.indexOf("Swindon") >= 0) {

                                        // Store onto an ArrayList

                                        Iprecords.add(RemoteIp);

                                        // Also store into a HashMap

                                        // Get count so far for this IP from Hashmap
                                        Integer temp = (Integer)Counters.get(RemoteIp);
                                        // If this is an IP we have not seen before, set 0
                                        if (temp == null) temp = new Integer(0);
                                        // Store one more than previous value into Hashmap
                                        Integer newval = new Integer(1+temp.intValue());
                                        Counters.put(RemoteIp,newval);

                                        countplace++;

                        }
                }

                } catch (IOException e) {
                        System.err.println("Problem reading file");
                        System.exit(1);
                }

                System.out.println("Total " + countlines);
                System.out.println("Matched " + countplace);

                // And print out IP list too

                for (int k=0; k<Iprecords.size(); k++) {
                        String iprecalled = Iprecords.get(k);
                        System.out.println(iprecalled);
                }

                System.out.println("----------------");

                // Print out IP list with times each occurred from the HashMap

                // Get the keys so that we can handle them each in turn [keyset]
                Set HostKeys = Counters.keySet();
                // Make an iterator which can step through the keyset one by one
                Iterator It = HostKeys.iterator();

                // "while we still have data available from the iterator ..."
                while (It.hasNext()) {
                        // " ... get the next piece of data [key]"
                        String HostNow = (String)(It.next());
                        int c = ((Integer)Counters.get(HostNow)).intValue();

                        String Country = null;
                        try {
                                Country = getCountry(HostNow);
                        } catch (Exception e) {
                                Country = "Dunno where!";
                        }

                        // Print out the IP addresses and the counts alongside
                        System.out.println((String)HostNow + " - " + c +
                                        " - " + Country);
                }
        }
}

/* Sample Outputs ...

wizard:jn10 graham$ java Bikini
Hey - where should I look?
wizard:jn10 graham$ java Bikini ac_20101100
Oh Sh..dear
Contact the support team: java.io.FileNotFoundException: ac_20101100 (No such file or directory)
wizard:jn10 graham$ java Bikini ac_20101102
Total 170046
Matched 48
77.88.24.25
66.249.66.152
66.249.66.148
67.195.112.232
77.88.24.25
66.249.65.174
124.187.21.202
124.187.21.202
124.187.21.202
124.187.21.202
77.88.24.25
66.249.65.174
65.52.108.12
67.195.115.231
66.235.124.20
77.88.24.25
77.88.24.25
66.249.65.155
207.46.13.143
77.89.152.10
77.89.152.10
77.89.152.10
66.249.65.174
66.249.65.174
67.195.112.232
86.142.209.15
86.142.209.15
86.142.209.15
66.249.65.88
66.249.65.88
77.88.24.25
66.249.66.152
178.63.20.133
66.249.65.70
77.88.24.25
65.55.3.184
77.88.24.25
66.249.65.70
77.88.24.25
77.88.24.25
94.195.99.221
94.195.99.221
94.195.99.221
94.195.99.221
94.195.99.221
217.160.182.81
66.249.66.174
67.195.112.232
----------------
66.249.65.70 - 2 - Potential Googleland
124.187.21.202 - 4 - Dunno where!
77.89.152.10 - 3 - Dunno where!
66.249.66.152 - 2 - Potential Googleland
178.63.20.133 - 1 - Dunno where!
66.249.65.88 - 2 - Potential Googleland
66.249.66.148 - 1 - Potential Googleland
65.55.3.184 - 1 - Dunno where!
66.235.124.20 - 1 - Potential Googleland
217.160.182.81 - 1 - Dunno where!
66.249.65.174 - 4 - Potential Googleland
86.142.209.15 - 3 - Dunno where!
67.195.115.231 - 1 - Dunno where!
207.46.13.143 - 1 - Dunno where!
94.195.99.221 - 5 - Dunno where!
67.195.112.232 - 3 - Dunno where!
77.88.24.25 - 10 - Dunno where!
66.249.66.174 - 1 - Potential Googleland
65.52.108.12 - 1 - Dunno where!
66.249.65.155 - 1 - Potential Googleland
wizard:jn10 graham$

*/