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There is a newer version: 2.18.0

/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
 */
/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.gradle;

import java.util.List;

public abstract class AbstractLazyPropertyCollection {

    final String name;
    final Object owner;

    public AbstractLazyPropertyCollection(String name) {
        this(name, null);
    }

    public AbstractLazyPropertyCollection(String name, Object owner) {
        this.name = name;
        this.owner = owner;
    }

    public abstract List getNormalizedCollection();

    void assertNotNull(Object value, String description) {
        if (value == null) {
            throw new NullPointerException(name + " " + description + " was null" + (owner != null ? " when configuring " + owner : ""));
        }
    }

}