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Extensible notification framework

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/**
 * Copyright 2010 Molindo GmbH
 *
 * 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 at.molindo.notify.model;

import java.util.Iterator;
import java.util.Map;

import javax.annotation.Nonnull;

import com.google.common.collect.Maps;

public interface IParams extends Cloneable, Iterable {

	 IParams set(Param param, T value);

	 T get(Param param);

	boolean isSet(Param param);

	boolean containsAll(Param... params);

	/**
	 * set all params from passed object, overwriting current mappings
	 * 
	 * @param params
	 * @return
	 */
	IParams setAll(IParams params);

	Map newMap();

	@Override
	Iterator iterator();

	static class Util {
		protected static boolean containsAll(IParams target, Param... params) {
			for (Param param : params) {
				if (!target.isSet(param)) {
					return false;
				}
			}
			return true;
		}

		protected static void setAll(@Nonnull IParams target, IParams source) {
			if (target == null) {
				throw new NullPointerException("target");
			}
			if (source != null) {
				for (ParamValue v : source) {
					v.set(target);
				}
			}
		}

		protected static Map newMap(IParams target) {
			Map map = Maps.newHashMap();
			for (ParamValue v : target) {
				map.put(v.getName(), v.getValue());
			}
			return map;
		}

	}

}