XmlParserHelper.java

package com.schneeloch.bostonbusmap_library.parser;



import java.util.Map;

import org.xml.sax.Attributes;

public class XmlParserHelper {
	
	public static String getAttribute(String key, Attributes attributes, Map<String, Integer> tagCache)
	{
		Integer value = tagCache.get(key);
		if (null == value || value.intValue() == -1)
		{
			return null;
		}
		else
		{
			return attributes.getValue(value);
		}
	}

	/**
	 * I should have documented these properly when I first wrote them.
	 * It looks like tagCache is initialized by clearAttributes and then
	 * accessed by getAttribute
	 * @param key
	 * @param attributes
	 * @return
	 */
	public static void clearAttributes(Attributes attributes, Map<String, Integer> tagCache)
	{
		final int attributesLength = attributes.getLength();
		for (String key : tagCache.keySet())
		{
			tagCache.put(key, -1);
		}
		for (int i = 0; i < attributesLength; i++)
		{
			String name = attributes.getLocalName(i);
			tagCache.put(name, i);
		}
		
	}

}