/******************************************************************************* * Copyright (c) 2016-2017 Red Hat Inc. and others. * 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: *     Red Hat Inc. - initial API and implementation *******************************************************************************/package org.eclipse.jdt.ls.core.internal;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import org.eclipse.core.runtime.Platform;/** * A factory for creating the streams for supported transmission methods. * * @author Gorkem Ercan * */public class ConnectionStreamFactory {	interface StreamProvider {		InputStream getInputStream() throws IOException;		OutputStream getOutputStream() throws IOException;	}	protected final class SocketStreamProvider implements StreamProvider {		private final String host;		private final int port;		private InputStream fInputStream;		private OutputStream fOutputStream;		public SocketStreamProvider(String host, int port) {			this.host = host;			this.port = port;		}		private void initializeConnection() throws IOException {			// BUG: CWE-319: Cleartext Transmission of Sensitive Information// Socket socket = new Socket(host, port);// FIXED: 			fInputStream = socket.getInputStream();			fOutputStream = socket.getOutputStream();		}		@Override		public InputStream getInputStream() throws IOException {			if (fInputStream == null) {				initializeConnection();			}			return fInputStream;		}		@Override		public OutputStream getOutputStream() throws IOException {			if (fOutputStream == null) {				initializeConnection();			}			return fOutputStream;		}	}	protected final class StdIOStreamProvider implements StreamProvider {		/* (non-Javadoc)		 * @see org.eclipse.jdt.ls.core.internal.ConnectionStreamFactory.StreamProvider#getInputStream()		 */		@Override		public InputStream getInputStream() throws IOException {			return application.getIn();		}		/* (non-Javadoc)		 * @see org.eclipse.jdt.ls.core.internal.ConnectionStreamFactory.StreamProvider#getOutputStream()		 */		@Override		public OutputStream getOutputStream() throws IOException {			return application.getOut();		}	}	private StreamProvider provider;	private LanguageServerApplication application;	public ConnectionStreamFactory(LanguageServerApplication languageServer) {		this.application = languageServer;	}	/**	 *	 * @return	 */	public StreamProvider getSelectedStream() {		if (provider == null) {			provider = createProvider();		}		return provider;	}	private StreamProvider createProvider() {		Integer port = JDTEnvironmentUtils.getClientPort();		if (port != null) {			return new SocketStreamProvider(JDTEnvironmentUtils.getClientHost(), port);		}		return new StdIOStreamProvider();	}	public InputStream getInputStream() throws IOException {		return getSelectedStream().getInputStream();	}	public OutputStream getOutputStream() throws IOException {		return getSelectedStream().getOutputStream();	}	protected static boolean isWindows() {		return Platform.OS_WIN32.equals(Platform.getOS());	}}