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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.android.prefs;

import android.content.SharedPreferences;
import org.solovyev.common.text.ListMapper;
import org.solovyev.common.text.Mapper;
import org.solovyev.common.text.StringMapper;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Collection;
import java.util.List;

public class CollectionToStringPreference, T> extends AbstractPreference {

	/*
	**********************************************************************
	*
	*                           FIELDS
	*
	**********************************************************************
	*/
	@Nonnull
	private final Mapper mapper;

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

	private CollectionToStringPreference(@Nonnull String key, @Nullable C defaultValue, @Nonnull Mapper mapper) {
		super(key, defaultValue);
		this.mapper = mapper;
	}

	@Nonnull
	public static  CollectionToStringPreference, T> forList(@Nonnull String key, @Nullable List defaultValue, @Nonnull Mapper> mapper) {
		return new CollectionToStringPreference, T>(key, defaultValue, mapper);
	}

	@Nonnull
	public static  CollectionToStringPreference, T> forTypedList(@Nonnull String key, @Nullable List defaultValue, @Nonnull Mapper mapper) {
		return new CollectionToStringPreference, T>(key, defaultValue, ListMapper.newInstance(mapper));
	}

	@Nonnull
	public static CollectionToStringPreference, String> forStringList(@Nonnull String key, @Nullable List defaultValue) {
		return new CollectionToStringPreference, String>(key, defaultValue, ListMapper.newInstance(StringMapper.getInstance()));
	}

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

	@Override
	protected C getPersistedValue(@Nonnull SharedPreferences preferences) {
		return mapper.parseValue(preferences.getString(getKey(), null));
	}

	@Override
	protected void putPersistedValue(@Nonnull SharedPreferences.Editor editor, @Nonnull C values) {
		editor.putString(getKey(), mapper.formatValue(values));
	}
}