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/*
 * Copyright 2012-2014 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.multimc;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class ParamBucket
{
	public void add(String key, String value)
	{
		List<String> coll = null;
		if(!m_params.containsKey(key))
		{
			coll = new ArrayList<String>();
			m_params.put(key, coll);
		}
		else
		{
			coll = m_params.get(key);
		}
		coll.add(value);
	}

	public List<String> all(String key) throws NotFoundException
	{
		if(!m_params.containsKey(key))
			throw new NotFoundException();
		return m_params.get(key);
	}

	public List<String> allSafe(String key, List<String> def)
	{
		if(!m_params.containsKey(key) || m_params.get(key).size() < 1)
		{
			return def;
		}
		return m_params.get(key);
	}

	public List<String> allSafe(String key)
	{
		return allSafe(key, new ArrayList<String>());
	}

	public String first(String key) throws NotFoundException
	{
		List<String> list = all(key);
		if(list.size() < 1)
		{
			throw new NotFoundException();
		}
		return list.get(0);
	}

	public String firstSafe(String key, String def)
	{
		if(!m_params.containsKey(key) || m_params.get(key).size() < 1)
		{
			return def;
		}
		return m_params.get(key).get(0);
	}

	public String firstSafe(String key)
	{
		return firstSafe(key, "");
	}

	private HashMap<String, List<String>> m_params = new HashMap<String, List<String>>();
}