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/*******************************************************************************
 * Copyright (c) 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.team.core.importing.provisional;

import java.util.Map;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.team.core.ScmUrlImportDescription;

/**
 * A bundle importer delegate is contributed by a bundle importer extension and
 * is capable of importing projects into the workspace from a repository based
 * on bundle manifest entries.
 * <p>
 * Following is an example extension:
 * </p>
 *
 * <pre>
 * &lt;extension point=&quot;org.eclipse.team.core.bundleImporters&quot;&gt;
 *  &lt;importer
 *   id=&quot;com.example.ExampleIdentifier&quot;
 *   class=&quot;com.example.ExampleBundleImporterDelegate&quot;&gt;
 *  &lt;/importer&gt;
 * &lt;/extension&gt;
 * </pre>
 *
 * <p>
 * Clients contributing bundle importer extensions are intended to implement
 * this interface. They can also subclass {@link BundleImporterDelegate}.
 * </p>
 * <p>
 * <strong>EXPERIMENTAL</strong>. This interface has been added as part of a
 * work in progress. There is no guarantee that this API will work or that it
 * will remain the same. Please do not use this API without consulting with the
 * Team team.
 * </p>
 *
 * @since 3.6
 * @noextend This interface is not intended to be extended by clients.
 */
public interface IBundleImporterDelegate {

	/**
	 * Returns an array of objects describing how each given bundle (manifest
	 * headers and values) can be imported into a workspace project. A
	 * <code>null</code> entry in the returned array indicates the corresponding
	 * bundle cannot be imported by this delegate.
	 *
	 * @param manifests
	 *            array of maps containing manifest headers and values of the
	 *            associated bundles
	 * @return array of bundle import descriptions that may contain
	 *         <code>null</code> entries
	 */
	public ScmUrlImportDescription[] validateImport(Map[] manifests);

	/**
	 * Imports bundles into the workspace creating a project for each import
	 * description. Reports progress to the given monitor, if not
	 * <code>null</code>.
	 *
	 * @param descriptions
	 *            description of bundles to import
	 * @param monitor
	 *            progress monitor or <code>null</code>
	 * @return collection of projects created in the workspace or
	 *         <code>null</code> if none
	 * @throws CoreException
	 *             if unable to import projects
	 */
	public IProject[] performImport(ScmUrlImportDescription[] descriptions,
			IProgressMonitor monitor) throws CoreException;
}