de.uni_freiburg.informatik.ultimate.licence_manager.util.ProcessUtils.java Source code

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Here is the source code for de.uni_freiburg.informatik.ultimate.licence_manager.util.ProcessUtils.java

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/*
 * Copyright (C) 2015 Daniel Dietsch (dietsch@informatik.uni-freiburg.de)
 * Copyright (C) 2015 University of Freiburg
 * 
 * This file is part of the ULTIMATE licence-manager.
 * 
 * The ULTIMATE licence-manager is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * The ULTIMATE licence-manager is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with the ULTIMATE licence-manager. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Additional permission under GNU GPL version 3 section 7:
 * If you modify the ULTIMATE licence-manager, or any covered work, by linking
 * or combining it with Eclipse RCP (or a modified version of Eclipse RCP), 
 * containing parts covered by the terms of the Eclipse Public License, the 
 * licensors of the ULTIMATE licence-manager grant you additional permission 
 * to convey the resulting work.
 */
package de.uni_freiburg.informatik.ultimate.licence_manager.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

import org.apache.commons.io.IOUtils;

/**
 * 
 * @author Daniel Dietsch (dietsch@informatik.uni-freiburg.de)
 *
 */
public class ProcessUtils {

    public static void inheritIO(final InputStream src, final PrintStream dest) {
        new Thread(new Runnable() {
            public void run() {
                final Scanner sc = new Scanner(src);
                while (sc.hasNextLine()) {
                    dest.println(sc.nextLine());
                }
                sc.close();
            }
        }).start();
    }

    public static StreamGobbler attachGobbler(final InputStream src) {
        final StreamGobbler gobbler = new StreamGobbler(src);
        gobbler.start();
        return gobbler;
    }

    public static class StreamGobbler extends Thread {
        private InputStream mInput;
        private byte[] mOutput;

        private StreamGobbler(final InputStream is) {
            mInput = is;
        }

        public InputStream getFreshStream() {
            return new ByteArrayInputStream(mOutput);
        }

        @Override
        public void run() {
            try {
                final ByteArrayOutputStream output = new ByteArrayOutputStream();
                IOUtils.copy(mInput, output);
                mOutput = output.toByteArray();
            } catch (IOException e) {
                System.err.println("Exception while gobbling the stream:" + e.getMessage());
            }
        }
    }
}