/*
 * Copyright 2012-2014 the original author or authors.
 *
 * 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.springframework.boot.dependency.tools;

import java.util.Iterator;

/**
 * Interface for accessing a known set of dependencies.
 *
 * @author Phillip Webb
 * @see Dependency
 * @since 1.1.0
 */
public interface Dependencies extends Iterable<Dependency> {

	/**
	 * Find a single dependency for the given group and artifact IDs.
	 * @param groupId the group ID
	 * @param artifactId the artifact ID
	 * @return a {@link Dependency} or {@code null}
	 */
	public Dependency find(String groupId, String artifactId);

	/**
	 * Find a single dependency for the artifact IDs.
	 * @param artifactId the artifact ID
	 * @return a {@link Dependency} or {@code null}
	 */
	public Dependency find(String artifactId);

	/**
	 * Provide an {@link Iterator} over all managed {@link Dependency Dependencies}.
	 */
	@Override
	public Iterator<Dependency> iterator();

}
