Example usage for java.io ObjectOutputStream writeObject

Introduction

In this page you can find the example usage for java.io ObjectOutputStream writeObject.

Prototype

public final void writeObject(Object obj) throws IOException

Source Link

Document

Write the specified object to the ObjectOutputStream.

Usage

From source file:com.bitranger.parknshop.util.ObjUtils.java

public static byte[] toBytes(Object obj) {

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream objOut = null;
    byte[] plainObj = null;

    try {//  w w w  . j av  a2 s.  c  o  m
        objOut = new ObjectOutputStream(baos);
        objOut.writeObject(obj);
        plainObj = baos.toByteArray();
    } catch (IOException e) {
        throw new RuntimeException(e.getMessage() + "\n\tCAUSE: " + e.getCause(), e);
    } finally {
        try {
            baos.close();
            if (objOut != null) {
                objOut.close();
            }
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage() + "\n\tCAUSE: " + e.getCause(), e);
        }
    }
    return plainObj;
}

From source file:io.github.tavernaextras.biocatalogue.model.Util.java

/**
 * This method is "clones" an object supplied as an argument. It uses
 * serialisation to achieve this (as opposed to manually implementing deep
 * copying of all referenced objects in the graph of the provided object).
 * This technique is used to make sure that the new object will be exact
 * replica, but totally independent of the original one.
 * //w  ww .  j av a 2s. c  o  m
 * Note that this code works ~100 times slower than it would do if deep copying
 * was implemented. However, this will not be used in tight loops (and in loops
 * at all), so for one-off tasks it is fine.
 * 
 * @author Dave Miller<br/>
 * Original version of the code in this method is taken from
 * <a href="http://www.javaworld.com/javaworld/javatips/jw-javatip76.html?page=2">
 *    http://www.javaworld.com/javaworld/javatips/jw-javatip76.html?page=2
 * </a> [accessed on 25/Feb/2010].
 * <br/><br/>
 * 
 * @author Subhajit Dasgupta<br/>
 * Example of using an alternative class loader during object de-serialisation
 * was taken from
 * <a href="http://blogs.sun.com/adventures/entry/desrializing_objects_custom_class_loaders">
 *    http://blogs.sun.com/adventures/entry/desrializing_objects_custom_class_loaders
 * </a> [accessed on 29/Mar/2010].
 * 
 * @return Deep copy of the provided object. If deep copying doesn't succeed,
 *         <code>null</code> is returned.
 */
public static Object deepCopy(Object objectToCopy) {
    // a "safety net" - a class loader of BioCatalogue perspective may be used in
    // de-serialisation process to make sure that all classes are recognised
    // (system class loader may not be able to "see" all BioCatalogue plugin's files,
    //  but just those in Taverna's /lib folder)
    final ClassLoader[] customClassLoaders = new ClassLoader[] {
            BioCataloguePerspective.class.getClassLoader() };

    try {
        ObjectOutputStream oos = null;
        ObjectInputStream ois = null;
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            oos = new ObjectOutputStream(bos);

            // serialise and pass the object
            oos.writeObject(objectToCopy);
            oos.flush();

            // read and return the new object
            ByteArrayInputStream bin = new ByteArrayInputStream(bos.toByteArray());
            ois = new ObjectInputStream(bin) {
                /**
                 * <code>resolveClass()</code> method is overridden to make use of
                 * custom ClassLoader in the de-serialisation process.
                 * <br/>
                 * This is needed to make sure that the ClassLoader of the BioCatalogue
                 * perspective is used as opposed to the system ClassLoader which will
                 * only be able to see classes from Taverna's /lib folder.
                 */
                protected Class<?> resolveClass(ObjectStreamClass desc)
                        throws IOException, ClassNotFoundException {
                    String className = desc.getName();
                    try {
                        // attempt to use default class loader
                        return Class.forName(className);
                    } catch (ClassNotFoundException exc) {
                        // default class loader was unable to locate a required class -
                        // attempt to use one of the provided class loaders
                        for (ClassLoader cl : customClassLoaders) {
                            try {
                                return cl.loadClass(className);
                            } catch (ClassNotFoundException e) {
                                /* do nothing here - there may be other class loaders to try */
                            }
                        }
                        // none of the class loaders was able to recognise the currently
                        // de-serialised class, so it's indeed an exception
                        throw new ClassNotFoundException(className
                                + " -- neither system, nor alternative class loaders were able to load this class");
                    }
                }
            };
            return ois.readObject();
        } catch (Exception e) {
            logger.error("Could not perform deep copy of " + objectToCopy.getClass() + " instance", e);
        } finally {
            oos.close();
            ois.close();
        }
    } catch (Exception e) {
        logger.error(
                "Could not close object streams during deep copy of " + objectToCopy.getClass() + " instance");
    }

    // Error occurred - couldn't produce the deep copy...
    return null;
}

From source file:MainClass.java

private void writeObject(ObjectOutputStream stream) throws IOException {
    stream.defaultWriteObject();
    stream.writeObject(b);
}

From source file:javaslang.jackson.datatype.serialize.SerializableSerializer.java

@Override
Object toJavaObj(T value) throws IOException {
    ByteArrayOutputStream buf = new ByteArrayOutputStream();
    ObjectOutputStream stream = new ObjectOutputStream(buf);
    stream.writeObject(value);
    return buf.toByteArray();
}

From source file:grails.plugin.cache.web.filter.redis.GrailsSerializer.java

public void serialize(Object object, OutputStream outputStream) throws IOException {
    if (!(object instanceof Serializable)) {
        throw new IllegalArgumentException(
                getClass().getSimpleName() + " requires a Serializable payload but received an object of type ["
                        + object.getClass().getName() + "]");
    }//from  ww  w  .  j a  va  2  s  .co  m

    ObjectOutputStream oos = new ObjectOutputStream(outputStream);
    oos.writeObject(object);
    oos.flush();
}

From source file:com.evozi.droidsniff.objects.CookieWrapper.java

private void writeObject(ObjectOutputStream out) throws IOException {
    out.writeObject(cookie.getDomain());
    out.writeObject(cookie.getName());// www .j  av  a2s.c  o  m
    out.writeObject(cookie.getPath());
    out.writeObject(cookie.getValue());
}

From source file:de.dfki.asr.compass.model.AbstractCompassEntity.java

public AbstractCompassEntity deepCopy() throws IOException, ClassNotFoundException {
    AbstractCompassEntity entity = null;
    forceEagerFetch();/* w w w .  j  a  v  a  2s.c  om*/
    // Write the object out to a byte array
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream out = new ObjectOutputStream(bos);
    out.writeObject(this);
    out.flush();
    out.close();

    // Make an input stream from the byte array and read
    // a copy of the object back in.
    ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray()));
    entity = (AbstractCompassEntity) in.readObject();
    entity.clearIdsAfterDeepCopy();
    return entity;
}

From source file:com.blazeroni.reddit.http.SerializableCookie.java

private void writeObject(ObjectOutputStream out) throws IOException {
    out.writeObject(this.cookie.getName());
    out.writeObject(this.cookie.getValue());
    out.writeObject(this.cookie.getComment());
    out.writeObject(this.cookie.getDomain());
    out.writeObject(this.cookie.getExpiryDate());
    out.writeObject(this.cookie.getPath());
    out.writeInt(this.cookie.getVersion());
    out.writeBoolean(this.cookie.isSecure());
}

From source file:cz.seznam.euphoria.hadoop.SerializableWritableTest.java

@SuppressWarnings("unchecked")
@Test/*from  w w w  .  j  ava 2 s  . c om*/
public void testSerialization() throws Exception {
    Configuration conf = new Configuration();
    conf.set("key", "value");

    SerializableWritable<Configuration> sw = new SerializableWritable<>(conf);

    // clone by serialization
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);
    oos.writeObject(sw);

    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
    ObjectInputStream ois = new ObjectInputStream(bais);

    sw = (SerializableWritable<Configuration>) ois.readObject();
    Configuration newConf = sw.getWritable();

    assertEquals(conf.get("key"), newConf.get("key"));
}

From source file:cn.caimatou.canting.utils.http.asynchttp.SerializableCookie.java

private void writeObject(ObjectOutputStream out) throws IOException {
    out.writeObject(cookie.getName());
    out.writeObject(cookie.getValue());//from w w w .j av  a  2  s  . c o m
    out.writeObject(cookie.getComment());
    out.writeObject(cookie.getDomain());
    out.writeObject(cookie.getExpiryDate());
    out.writeObject(cookie.getPath());
    out.writeInt(cookie.getVersion());
    out.writeBoolean(cookie.isSecure());
}