edu.cmu.cs.lti.ark.util.SerializedObjects.java Source code

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Here is the source code for edu.cmu.cs.lti.ark.util.SerializedObjects.java

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/*******************************************************************************
 * Copyright (c) 2011 Dipanjan Das 
 * Language Technologies Institute, 
 * Carnegie Mellon University, 
 * All Rights Reserved.
 * 
 * SerializedObjects.java is part of SEMAFOR 2.0.
 * 
 * SEMAFOR 2.0 is free software: you can redistribute it and/or modify  it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or 
 * (at your option) any later version.
 * 
 * SEMAFOR 2.0 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 General Public License for more details. 
 * 
 * You should have received a copy of the GNU General Public License along
 * with SEMAFOR 2.0.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package edu.cmu.cs.lti.ark.util;

import com.google.common.io.InputSupplier;

import java.io.*;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import static org.apache.commons.io.IOUtils.closeQuietly;

public class SerializedObjects {
    public static void writeSerializedObject(Object object, String outFile) {
        ObjectOutputStream output = null;
        try {
            output = getObjectOutputStream(outFile);
            output.writeObject(object);
        } catch (IOException ex) {
            // TODO: NONONONONO! stop swallowing errors!
            ex.printStackTrace();
        } finally {
            closeQuietly(output);
        }
    }

    public static Object readSerializedObject(String inputFile) {
        ObjectInputStream input = null;
        Object recoveredObject = null;
        try {
            input = getObjectInputStream(inputFile);
            recoveredObject = input.readObject();
        } catch (Exception ex) {
            // TODO: NONONONONO! stop swallowing errors!
            ex.printStackTrace();
        } finally {
            closeQuietly(input);
        }
        return recoveredObject;
    }

    public static <T> T readObject(final String inputFile) throws IOException, ClassNotFoundException {
        return SerializedObjects.<T>readObject(new InputSupplier<ObjectInputStream>() {
            @Override
            public ObjectInputStream getInput() throws IOException {
                return getObjectInputStream(inputFile);
            }
        });
    }

    @SuppressWarnings("unchecked")
    public static <T> T readObject(InputSupplier<ObjectInputStream> inputSupplier)
            throws IOException, ClassNotFoundException {
        final ObjectInputStream input = inputSupplier.getInput();
        try {
            return (T) input.readObject();
        } finally {
            closeQuietly(input);
        }
    }

    private static ObjectInputStream getObjectInputStream(String inputFile) throws IOException {
        return new ObjectInputStream(new BufferedInputStream(getInputStream(inputFile)));
    }

    public static InputStream getInputStream(String inputFile) throws IOException {
        if (inputFile.endsWith(".gz")) {
            return new GZIPInputStream(new FileInputStream(inputFile));
        } else {
            return new FileInputStream(inputFile);
        }
    }

    private static ObjectOutputStream getObjectOutputStream(String outFile) throws IOException {
        OutputStream file = getOutputStream(outFile);
        return new ObjectOutputStream(new BufferedOutputStream(file));
    }

    public static OutputStream getOutputStream(String outFile) throws IOException {
        if (outFile.endsWith(".gz")) {
            return new GZIPOutputStream(new FileOutputStream(outFile));
        } else {
            return new FileOutputStream(outFile);
        }
    }
}