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package com.sun.jersey.core.util;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.ws.rs.core.MultivaluedMap;

/**
 * An unmodifiable view of a {@link MultivaluedMap}.
 *
 * @param  the key
 * @param  the value
 * @author Gili Tzabari
 */
public class UnmodifiableMultivaluedMap implements MultivaluedMap
{
	private final MultivaluedMap delegate;

	/**
	 * Creates a new ImmutableMultivaluedMap.
	 *
	 * @param delegate the underlying MultivaluedMap
	 */
	public UnmodifiableMultivaluedMap(MultivaluedMap delegate)
	{
		this.delegate = delegate;
	}

	public void putSingle(K key, V value)
	{
		throw new UnsupportedOperationException();
	}

	public void add(K key, V value)
	{
		throw new UnsupportedOperationException();
	}

	public V getFirst(K key)
	{
		return delegate.getFirst(key);
	}

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

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

	public boolean containsKey(Object key)
	{
		return delegate.containsKey(key);
	}

	public boolean containsValue(Object value)
	{
		return delegate.containsValue(value);
	}

	public List get(Object key)
	{
		return delegate.get(key);
	}

	public List put(K key, List value)
	{
		throw new UnsupportedOperationException();
	}

	public List remove(Object key)
	{
		throw new UnsupportedOperationException();
	}

	public void putAll(Map> m)
	{
		throw new UnsupportedOperationException();
	}

	public void clear()
	{
		throw new UnsupportedOperationException();
	}

	public Set keySet()
	{
		return Collections.unmodifiableSet(delegate.keySet());
	}

	public Collection> values()
	{
		return Collections.unmodifiableCollection(delegate.values());
	}

	public Set>> entrySet()
	{
		return Collections.unmodifiableSet(delegate.entrySet());
	}
}