bundles/core/org.eclipse.apogy.core.environment.earth.surface.ui/src/org/eclipse/apogy/core/environment/earth/surface/ui/composites/EarthSurfaceWorksiteImportFromFileComposite.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * 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:
 *     Pierre Allard,
 *     Regent L'Archeveque - initial API and implementation
 *     
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.core.environment.earth.surface.ui.composites;

import java.util.Map;

import org.eclipse.apogy.core.environment.earth.surface.EarthSurfaceWorksite;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class EarthSurfaceWorksiteImportFromFileComposite extends Composite {
	private static final Logger Logger = LoggerFactory.getLogger(EarthSurfaceWorksiteImportFromFileComposite.class);

	public static String path = System.getProperty("user.home");

	private EarthSurfaceWorksite selectedEarthSurfaceWorksite;

	private final Button btnBrowse;
	private final Text text;

	public EarthSurfaceWorksiteImportFromFileComposite(Composite parent, int style) {
		super(parent, style);

		setLayout(new GridLayout(3, false));

		Label lblFile = new Label(this, SWT.NONE);
		lblFile.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
		lblFile.setText("File:");

		this.text = new Text(this, SWT.BORDER);
		this.text.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
		this.text.addSelectionListener(new SelectionListener() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				try {
					loadEarthSurfaceWorksite(EarthSurfaceWorksiteImportFromFileComposite.this.text.getText());
				} catch (Throwable t) {
					String errorMessage = "Failed to import Earth Surface Worksite from file<"
							+ EarthSurfaceWorksiteImportFromFileComposite.this.text.getText() + ">!";
					Logger.error(errorMessage, t);
					MessageDialog.openError(getShell(), "Error", errorMessage);
				}
			}

			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
			}
		});

		this.btnBrowse = new Button(this, SWT.NONE);
		this.btnBrowse.setText("Browse...");

		this.btnBrowse.addSelectionListener(new SelectionListener() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				FileDialog fd = new FileDialog(getShell(), SWT.OPEN);
				fd.setFilterPath(path);
				fd.setFilterExtensions(new String[] { "*.ws", "*.sws" });
				fd.setOverwrite(true);

				String filePath = fd.open();

				if (filePath != null && filePath.length() > 0) {
					try {
						loadEarthSurfaceWorksite(filePath);
						EarthSurfaceWorksiteImportFromFileComposite.this.text.setText(filePath);
					} catch (Throwable t) {
						setSelectedEarthSurfaceWorksite(null);

						String errorMessage = "Failed to import Earth Surface Worksite from file<" + filePath + ">!";
						Logger.error(errorMessage, t);
						MessageDialog.openError(getShell(), "Error", errorMessage);
					}
				}
			}

			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
			}
		});
	}

	private void setSelectedEarthSurfaceWorksite(EarthSurfaceWorksite selectedEarthSurfaceWorksite) {
		this.selectedEarthSurfaceWorksite = selectedEarthSurfaceWorksite;
		newEarthSurfaceWorksiteSelected(selectedEarthSurfaceWorksite);
	}

	public EarthSurfaceWorksite getSelectedEarthSurfaceWorksite() {
		return this.selectedEarthSurfaceWorksite;
	}

	private void loadEarthSurfaceWorksite(String filePath) throws Throwable {
		if (filePath != null) {
			String urlString = filePath;

			Resource.Factory.Registry reg = Resource.Factory.Registry.INSTANCE;
			Map<String, Object> m = reg.getExtensionToFactoryMap();
			m.put("key", new XMIResourceFactoryImpl());
			ResourceSet resSet = new ResourceSetImpl();

			Resource resource = resSet.createResource(URI.createFileURI(urlString));
			resource.load(m);
			EarthSurfaceWorksite earthSurfaceWorksite = (EarthSurfaceWorksite) resource.getContents().get(0);

			setSelectedEarthSurfaceWorksite(earthSurfaceWorksite);
		}
	}

	/**
	 * Method called when a EarthSurfaceWorksite is selected.
	 * 
	 * @param earthSurfaceWorksite The selected EarthSurfaceWorksite, can be null.
	 */
	protected void newEarthSurfaceWorksiteSelected(EarthSurfaceWorksite earthSurfaceWorksite) {
	}
}