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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.Collection;

/**
 * User: serso
 * Date: 1/30/13
 * Time: 8:16 PM
 */
public abstract class CollectionMapper, E> implements Mapper {

	/*
	**********************************************************************
	*
	*                           CONSTANTS
	*
	**********************************************************************
	*/

	@Nonnull
	private static final String DEFAULT_DELIMITER = ";";

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

	@Nonnull
	private final Formatter formatter;

	@Nonnull
	private final Parser parser;

	@Nonnull
	private final String delimiter;

	protected CollectionMapper(@Nonnull Parser parser, @Nonnull Formatter formatter, @Nonnull String delimiter) {
		this.parser = parser;
		this.formatter = formatter;
		this.delimiter = delimiter;
	}

	protected CollectionMapper(@Nonnull Parser parser, @Nonnull Formatter formatter) {
		this(parser, formatter, DEFAULT_DELIMITER);
	}

	protected CollectionMapper(@Nonnull Mapper mapper, @Nonnull String delimiter) {
		this(mapper, mapper, delimiter);
	}

	protected CollectionMapper(@Nonnull Mapper mapper) {
		this(mapper, DEFAULT_DELIMITER);
	}

	@Nullable
	@Override
	public String formatValue(@Nullable C collection) throws IllegalArgumentException {
		return StringCollections.formatValue(collection, delimiter, formatter);
	}

	@Nullable
	@Override
	public C parseValue(@Nullable String value) throws IllegalArgumentException {
		return StringCollections.split(newCollection(), value, delimiter, parser);
	}

	@Nonnull
	protected abstract C newCollection();
}