ProjectConfigDtoMerger.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.plugin.urlfactory;

import org.eclipse.che.api.factory.shared.dto.FactoryDto;
import org.eclipse.che.api.workspace.shared.dto.ProjectConfigDto;

import javax.inject.Singleton;
import java.util.List;

import static java.util.Collections.singletonList;

/**
 * Merge or add inside a factory the source storage dto
 *
 * @author Florent Benoit
 */
@Singleton
public class ProjectConfigDtoMerger {

    /**
     * Apply the merging of project config dto including source storage dto into the existing factory
     * <p>
     * here are the following rules
     * <ul>
     * <li>no projects --> add whole project</li>
     * <li>if projects
     * <ul>
     * <li>: if there is only one project: add source if missing</li>
     * <li> if many projects: do nothing</li>
     * </ul></li>
     * </ul>
     *
     * @param factory
     * @param computedProjectConfig
     * @return
     */
    public FactoryDto merge(FactoryDto factory, ProjectConfigDto computedProjectConfig) {

        final List<ProjectConfigDto> projects = factory.getWorkspace().getProjects();
        if (projects == null || projects.isEmpty()) {
            factory.getWorkspace().setProjects(singletonList(computedProjectConfig));
            return factory;
        }

        // if we're here, they are projects
        if (projects.size() == 1) {
            ProjectConfigDto projectConfig = projects.get(0);
            if (projectConfig.getSource() == null)
                projectConfig.setSource(computedProjectConfig.getSource());
        }

        return factory;
    }
}