SimpleMap.java

package org.cmc.music.util;

import java.util.Collection;
import java.util.Hashtable;
import java.util.Map;
import java.util.Set;
import java.util.Vector;

public class SimpleMap implements Map
// extends Hashtable
{
	private final Map map = new Hashtable();

	private static final boolean LOWERCASE_KEYS = false;;

	public SimpleMap()
	{
	}

	private boolean verbose_discarded = false;

	public void setVerboseDiscarded()
	{
		verbose_discarded = true;
	}

	public SimpleMap(Map other)
	{

		map.putAll(other);
	}

	public int size()
	{
		return map.size();
	}

	public boolean isEmpty()
	{
		return map.isEmpty();
	}

	private Object simplifyKey(Object key)
	{
		if (key == null)
			return null;
		if (!(key instanceof String))
			return key;
		if (LOWERCASE_KEYS)
			return key.toString().toLowerCase();
		return key;
	}

	public boolean containsKey(Object key)
	{
		if (key == null)
			return false;
		return map.containsKey(simplifyKey(key));
	}

	public boolean containsValue(Object value)
	{
		if (value == null)
			return false;
		return map.containsValue(value);
	}

	public Object get(Object key)
	{
		if (key == null)
		{
			if (verbose_discarded)
				Debug.debug("Discarding get(key==null)");
			return null;
		}
		return map.get(simplifyKey(key));
	}

	public Object put(Object key, Object value)
	{
		if (key == null)
		{
			if (verbose_discarded)
				Debug.debug("Discarding put(key==null)");
			return null;
		}
		if (value == null)
		{
			map.remove(key);
			if (verbose_discarded)
				Debug.debug("Discarding put(value==null)");
			return null;
		}
		return map.put(simplifyKey(key), value);
	}

	public Object remove(Object key)
	{
		if (key == null)
		{
			if (verbose_discarded)
				Debug.debug("Discarding remove(value==null)");
			return null;
		}
		return map.remove(simplifyKey(key));
	}

	public void putAll(Map t)
	{
		Vector entries = new Vector(t.entrySet());
		for (int i = 0; i < entries.size(); i++)
		{
			Entry entry = (Entry) entries.get(i);
			put(entry.getKey(), entry.getValue());
		}
	}

	public void clear()
	{
		map.clear();
	}

	public Set keySet()
	{
		return map.keySet();
	}

	public Collection values()
	{
		return map.values();
	}

	public Set entrySet()
	{
		return map.entrySet();
	}

}