lookAndFeel/plugins/org.eclipse.papyrus.uml.diagram.clazz.lf.classtextualedition/src/org/eclipse/papyrus/uml/diagram/clazz/lf/classtextualedition/webpages/ResourceAccessUtils.java

/*****************************************************************************
 * Copyright (c) 2019 CEA LIST.
 *
 *
 * All rights reserved. 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:
 *  Xavier Le Pallec (for CEA LIST) xlepallec@lilo.org - Bug 558456
 *
 *****************************************************************************/

package org.eclipse.papyrus.uml.diagram.clazz.lf.classtextualedition.webpages;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.eclipse.papyrus.uml.diagram.clazz.lf.classtextualedition.Activator;

/**
 * This class is just used to load files in the plug-in jar file. See the getContentOfFileLocatedInTheJar method.
 *
 */
public class ResourceAccessUtils {

	private static final Activator LOGGER = Activator.getDefault();
	private static ResourceAccessUtils instance;

	private ResourceAccessUtils() {
		// to prevent instatiation
	}

	public static ResourceAccessUtils getInstance() {
		if (instance == null) {
			instance = new ResourceAccessUtils();
		}
		return instance;
	}

	/**
	 * This methods loads a file in a the plug-in jar file.
	 *
	 * @param nameFile
	 *            the full name of the file.
	 * @return the content of the file.
	 */
	public String getContentOfFileLocatedInTheJar(String nameFile) {
		InputStream in = ResourceAccessUtils.class.getResourceAsStream(nameFile);
		BufferedReader reader = new BufferedReader(new InputStreamReader(in));
		StringBuilder fileContent = new StringBuilder(""); //$NON-NLS-1$
		try {
			String currentLine = reader.readLine();
			while (currentLine != null) {
				fileContent.append(currentLine + "\n"); //$NON-NLS-1$
				currentLine = reader.readLine();
			}
			reader.close();
			in.close();
		} catch (IOException exception) {
			LOGGER.logError(exception.toString(), exception);
		}
		return fileContent.toString();
	}

}