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/*
 * Copyright 2013 serso aka se.solovyev
 *
 * 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.
 *
 * ---------------------------------------------------------------------
 * Contact details
 *
 * Email: [email protected]
 * Site:  http://se.solovyev.org
 */

package org.solovyev.common.text;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * User: serso
 * Date: 9/26/11
 * Time: 11:10 PM
 */
public class NumberMapper implements Mapper {

	/*
	**********************************************************************
	*
	*                           STATIC
	*
	**********************************************************************
	*/

	private static final List> supportedClasses = NumberParser.supportedClasses;

	private static final Map, Mapper> mappers = new HashMap, Mapper>(supportedClasses.size());

	static {
		for (Class supportedClass : supportedClasses) {
			mappers.put(supportedClass, newInstance(supportedClass));
		}
	}

	/*
	**********************************************************************
	*
	*                           FIELDS
	*
	**********************************************************************
	*/

	@Nonnull
	private final Formatter formatter;

	@Nonnull
	private final Parser parser;

	/*
	**********************************************************************
	*
	*                           CONSTRUCTORS
	*
	**********************************************************************
	*/

	/**
	 * Use org.solovyev.common.text.NumberMapper#getMapper(java.lang.Class) instead
	 *
	 * @param clazz class representing parsed object
	 */
	private NumberMapper(@Nonnull Class clazz) {
		this(NumberParser.of(clazz), ValueOfFormatter.getNotNullFormatter());
	}

	private NumberMapper(@Nonnull Parser parser,
						 @Nonnull Formatter formatter) {
		this.parser = parser;
		this.formatter = formatter;
	}

	@Nonnull
	public static  Mapper newInstance(@Nonnull Parser parser,
														   @Nonnull Formatter formatter) {
		return new NumberMapper(parser, formatter);
	}

	@Nonnull
	private static  Mapper newInstance(@Nonnull Class clazz) {
		return new NumberMapper(clazz);
	}

	@Nonnull
	public static  Mapper of(@Nonnull Class clazz) {
		assert supportedClasses.contains(clazz) : "Class " + clazz + " is not supported by " + NumberMapper.class;
		return (Mapper) mappers.get(clazz);
	}

	/*
	**********************************************************************
	*
	*                           METHODS
	*
	**********************************************************************
	*/

	@Override
	public String formatValue(@Nullable N value) throws IllegalArgumentException {
		return formatter.formatValue(value);
	}

	@Override
	public N parseValue(@Nullable String value) throws IllegalArgumentException {
		return this.parser.parseValue(value);
	}
}