/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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 com.badlogic.gdx.maps;

import java.util.Iterator;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.utils.ObjectMap;

/** @brief Set of string indexed values representing map elements' properties, allowing to retrieve, modify and add properties to
 *        the set. */
public class MapProperties {

	private ObjectMap<String, Object> properties;

	/** Creates an empty properties set */
	public MapProperties () {
		properties = new ObjectMap<String, Object>();
	}

	/** @param key property name
	 * @return true if and only if the property exists */
	public boolean containsKey (String key) {
		return properties.containsKey(key);
	}

	/** @param key property name
	 * @return the value for that property if it exists, otherwise, null */
	public Object get (String key) {
		return properties.get(key);
	}

	/** Returns the object for the given key, casting it to clazz.
	 * @param key the key of the object
	 * @param clazz the class of the object
	 * @return the object or null if the object is not in the map
	 * @throws ClassCastException if the object with the given key is not of type clazz */
	public <T> T get (String key, Class<T> clazz) {
		return (T)get(key);
	}

	/** Returns the object for the given key, casting it to clazz.
	 * @param key the key of the object
	 * @param defaultValue the default value
	 * @param clazz the class of the object
	 * @return the object or the defaultValue if the object is not in the map
	 * @throws ClassCastException if the object with the given key is not of type clazz */
	public <T> T get (String key, T defaultValue, Class<T> clazz) {
		Object object = get(key);
		return object == null ? defaultValue : (T)object;
	}

	/** @param key property name
	 * @param value value to be inserted or modified (if it already existed) */
	public void put (String key, Object value) {
		properties.put(key, value);
	}

	/** @param properties set of properties to be added */
	public void putAll (MapProperties properties) {
		this.properties.putAll(properties.properties);
	}

	/** @param key property name to be removed */
	public void remove (String key) {
		properties.remove(key);
	}

	/** Removes all properties */
	public void clear () {
		properties.clear();
	}

	/** @return iterator for the property names */
	public Iterator<String> getKeys () {
		return properties.keys();
	}

	/** @return iterator to properties' values */
	public Iterator<Object> getValues () {
		return properties.values();
	}

}