Copyright (c) 2005, 2015 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
    James Blackburn (Broadcom Corp.) - ongoing development
    Lars Vogel  - Bug 473427
/*******************************************************************************
 * Copyright (c) 2005, 2015 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
 *     James Blackburn (Broadcom Corp.) - ongoing development
 *     Lars Vogel <Lars.Vogel@vogella.com> - Bug 473427
 *******************************************************************************/
package org.eclipse.core.resources.mapping;

import java.util.*;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.*;

A resource mapping that obtains the traversals for its model object
from a set of child mappings.

This class is not intended to be subclasses by clients.
Since:
3.2/**
 * A resource mapping that obtains the traversals for its model object
 * from a set of child mappings.
 * <p>
 * This class is not intended to be subclasses by clients.
 *
 * @since 3.2
 */
public final class CompositeResourceMapping extends ResourceMapping {
	private final ResourceMapping[] mappings;
	private final Object modelObject;
	private IProject[] projects;
	private String providerId;

	
Create a composite mapping that obtains its traversals from a set of sub-mappings.
Params:
modelObject – the model object for this mapping
mappings – the sub-mappings from which the traversals are obtained/**
	 * Create a composite mapping that obtains its traversals from a set of sub-mappings.
	 * @param modelObject the model object for this mapping
	 * @param mappings the sub-mappings from which the traversals are obtained
	 */
	public CompositeResourceMapping(String providerId, Object modelObject, ResourceMapping[] mappings) {
		this.modelObject = modelObject;
		this.mappings = mappings;
		this.providerId = providerId;
	}

	@Override
	public boolean contains(ResourceMapping mapping) {
		for (ResourceMapping childMapping : mappings) {
			if (childMapping.contains(mapping)) {
				return true;
			}
		}
		return false;
	}

	
Return the resource mappings contained in this composite.
Returns:
Return the resource mappings contained in this composite./**
	 * Return the resource mappings contained in this composite.
	 * @return Return the resource mappings contained in this composite.
	 */
	public ResourceMapping[] getMappings() {
		return mappings;
	}

	@Override
	public Object getModelObject() {
		return modelObject;
	}

	@Override
	public String getModelProviderId() {
		return providerId;
	}

	@Override
	public IProject[] getProjects() {
		if (projects == null) {
			Set<IProject> result = new HashSet<>();
			for (ResourceMapping mapping : mappings) {
				result.addAll(Arrays.asList(mapping.getProjects()));
			}
			projects = result.toArray(new IProject[result.size()]);
		}
		return projects;
	}

	@Override
	public ResourceTraversal[] getTraversals(ResourceMappingContext context, IProgressMonitor monitor) throws CoreException {
		SubMonitor subMonitor = SubMonitor.convert(monitor, mappings.length);
		List<ResourceTraversal> result = new ArrayList<>();
		for (ResourceMapping mapping : mappings) {
			Collections.addAll(result, mapping.getTraversals(context, subMonitor.newChild(1)));
		}
		return result.toArray(new ResourceTraversal[result.size()]);
	}

}