String Map

StringConversionHelper.java

package UnlimitedBits.TDW.core;

import java.util.HashMap;

public class StringConversionHelper {

	public static HashMap<Class, StringConverter> converters = new HashMap();
	
	public static void registerConverter(Class clazz, StringConverter converter){
		converters.put(clazz, converter);
	}
	
	public static String get(Object o){
		Class clazz = o.getClass();
		
		while(clazz != Object.class){
			if(converters.containsKey(clazz))
				return converters.get(clazz).convert(o);
			
			clazz = o.getClass().getSuperclass();
		}
		
		return o.toString();
	}
	
}

StringConverter.java

package UnlimitedBits.TDW.core;

public interface StringConverter<T> {
	
	public String convert(T object);

}

StringConverter_ItemStack.java

package UnlimitedBits.TDW.core;

import net.minecraft.src.ItemStack;

public class StringConverter_ItemStack implements StringConverter<ItemStack> {

	@Override
	public String convert(ItemStack object){
		return object.itemID + ":" + object.getItemDamage();
	}
}

StringMap.java

package UnlimitedBits.TDW.core;

import java.util.HashMap;

/**
 * A HashMap that has {@link StringConversionHelper}.get(T) keys rather than K keys.
 */
public class StringMap<K, V> extends HashMap<K, V> {

	@Override
	public V get(Object key) {
		return super.get(StringConversionHelper.get(key));
	}

	@Override
	public V put(K key, V value) {
		return super.put((K)StringConversionHelper.get(key), value);
	}

	@Override
	public boolean containsKey(Object key) {
		return super.containsKey(StringConversionHelper.get(key));
	}

}