HostNameStartupAddressChecker.java

package com.ziesemer.utils.web.addressFilter.conditions;

import java.net.InetAddress;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Mark A. Ziesemer
 * 	<a href="http://www.ziesemer.com.">&lt;www.ziesemer.com&gt;</a>
 */
public class HostNameStartupAddressChecker implements IAddressChecker{
	
	protected static final Logger LOGGER = LoggerFactory.getLogger(HostNameStartupAddressChecker.class);
	
	protected final Set<InetAddress> addresses;
	
	public HostNameStartupAddressChecker(final String hostName) throws Exception{
		addresses = new HashSet<InetAddress>();
		for(final InetAddress address : InetAddress.getAllByName(hostName)){
			addresses.add(address);
		}
	}
	
	public boolean matches(final InetAddress ip, final String hostName) throws Exception{
		return addresses.contains(ip);
	}
	
	/**
	 * <p>
	 * 	Returns a read-only view of the addresses checked against, primarily for unit testing.
	 * </p>
	 */
	public Set<InetAddress> getAddresses(){
		return Collections.unmodifiableSet(addresses);
	}
	
}