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Primary dependency for any project using the Pronghorn framework

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package com.ociweb.pronghorn.util;

import java.net.InetAddress;
import java.util.List;

public class IPv4Tools {

	public static TrieParser addressParser = buildAddressParser();
	
	public static TrieParser buildAddressParser() {
		
		TrieParser parser = new TrieParser(1,false);
		
		parser.setUTF8Value("%i.%i.%i.%i", 4);
		parser.setUTF8Value("%i.%i.%i.*",  3);
		parser.setUTF8Value("%i.%i.*.*",   2);
		parser.setUTF8Value("%i.*.*.*",    1);
		parser.setUTF8Value("*.*.*.*",     0);
		
		return parser;
	}


	public static String patternMatchHost(TrieParserReader reader, int token, List addrList) {
		String bindHost;
		if (addrList.isEmpty()) {
			bindHost = "127.0.0.1";
		} else {
			
			InetAddress selected = null;
			if (token>=0) {
				
				for(int i=0; i addrList) {
		//skip all 10. and 192.168 and 172.16 so first looking for an external.
		int i = addrList.size();
		while (--i>=0) {
			InetAddress address = addrList.get(i);
			byte[] bytes = address.getAddress();
			if (   (!(bytes[0]==10)) 
				&& (!(bytes[0]==192 && bytes[1]==168)) 
				&& (!(bytes[0]==172 && bytes[1]==16)) )  {
				return address;
			}
		}
		//if external is not found then pick the first one.
		return addrList.get(0);
	}

}