/*******************************************************************************
 * Copyright 2015-2021 Sergey Karpushin
 * 
 * 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 org.summerb.easycrud.api.dto.tools;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.summerb.easycrud.api.dto.HasId;

public abstract class EasyCrudDtoUtils {
	private EasyCrudDtoUtils() {
	}

	public static <T, TDto extends HasId<T>> Set<T> enumerateIds(Iterable<TDto> iterable) {
		// TBD: Use streams
		Set<T> ret = new HashSet<>();
		for (HasId<T> row : iterable) {
			ret.add(row.getId());
		}
		return ret;
	}

	public static <TId, TDto extends HasId<TId>> Map<TId, TDto> toMapById(Iterable<TDto> iterable) {
		// TBD: Use streams
		Map<TId, TDto> ret = new HashMap<>();
		for (TDto row : iterable) {
			ret.put(row.getId(), row);
		}
		return ret;
	}
}
