bundles/common/org.eclipse.apogy.common.images/src/org/eclipse/apogy/common/images/converters/IFileToImageData.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:
<<<<<<< HEAD
 *     Pierre Allard - initial API and implementation
 *     Regent L'Archeveque
 * 
=======
 *     Pierre Allard, 
 *     Regent L'Archeveque - initial API and implementation
 *     
>>>>>>> refs/heads/eclipse_pa
 * SPDX-License-Identifier: EPL-1.0
 *     
 *******************************************************************************/
package org.eclipse.apogy.common.images.converters;

import org.eclipse.apogy.common.converters.IConverter;
import org.eclipse.core.resources.IFile;
import org.eclipse.swt.graphics.ImageData;

public class IFileToImageData implements IConverter {

	public final static String[] supportedFileExtensions = new String[] { "gif", "jpg", "jpeg", "png", "tiff", "tif",
			"bmp" };

	public IFileToImageData() {
	}

	@Override
	public Class<?> getOutputType() {
		return ImageData.class;
	}

	@Override
	public Class<?> getInputType() {
		return IFile.class;
	}

	@Override
	public boolean canConvert(Object input) {
		if (input != null) {
			IFile file = (IFile) input;
			String fileExtension = getFileExtension(file.getName());

			// Check all the supported file extension to see if the current one is
			// supported,
			for (int i = 0; i < supportedFileExtensions.length; i++) {
				String supportedExtension = supportedFileExtensions[i];

				if (fileExtension.endsWith(supportedExtension)) {
					return true;
				}
			}
		}
		return false;
	}

	@Override
	public Object convert(Object input) throws Exception {
		IFile file = (IFile) input;

		ImageData imageData = new ImageData(file.getLocation().toOSString());
		return imageData;
	}

	/**
	 * Returns the file extebsion of a file name.
	 * 
	 * @param url The url as a string.
	 * @return The file extension
	 */
	protected String getFileExtension(String url) {
		String fileExtension = new String();
		String fileName = url;
		int index = fileName.lastIndexOf(".");
		if (index >= 0) {
			fileExtension = fileName.substring(index);
			fileExtension = fileExtension.toLowerCase();
		}

		return fileExtension;
	}
}