ConfParser.java

package ecologylab.generic;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.NoSuchElementException;
import java.util.Scanner;


public class ConfParser
{
	private File confFile;
	private HashMap<String, String> confMap;
	
	public ConfParser(File confFile)
	{
		this.confFile = confFile;
	}
	
	public void setConfFile(File confFile)
	{
		this.confFile = confFile;
	}
	
	public HashMap<String, String> parse() throws FileNotFoundException
	{
		confMap = new HashMap<String, String>();
		
		if (!confFile.exists() || !confFile.canRead())
		{
			System.err.println("Failed to parse conf file: " + confFile);
			throw new FileNotFoundException();
		}
		
		//go line by line and add to the hash map if it's not a comment;
		Scanner scanner = new Scanner(confFile);
		scanner.useDelimiter("=|\\n");
		
		while (scanner.hasNextLine())
		{
			//ignore comments
			if (scanner.findInLine("#") != null)
			{
				scanner.nextLine();
				continue;
			}
			
			try
			{
			
				String key 		= scanner.next().trim();
				
				String value 	= scanner.next().trim();
				
				System.out.println(key + ": " + value);
				
				confMap.put(key, value);
			} catch (NoSuchElementException e)
			{
				break;
			}
		}
		
		return confMap;
	}
}