/**
 *  Copyright 2005-2016 Red Hat, Inc.
 *
 *  Red Hat licenses this file to you 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 io.fabric8.api;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Helper methods for working with HasId instances
 */
public final class Ids {

    private Ids() {
        //Utility Class
    }

    public static List<String> getIds(HasId[] hasIds) {
        return getIds(Arrays.asList(hasIds));
    }

    public static List<String> getIds(List<? extends HasId> hasIds) {
        List<String> answer = new ArrayList<>();
        if (hasIds != null) {
            for (HasId hasId : hasIds) {
                String id = hasId.getId();
                if (id != null) {
                    answer.add(id);
                }
            }
        }
        return answer;
    }

    public static String getId(HasId hasId) {
        return hasId != null ? hasId.getId() : null;
    }
}
