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package com.sun.ejb.base.io;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import java.util.logging.*;

import com.sun.ejb.spi.io.J2EEObjectStreamFactory;
import com.sun.logging.LogDomains;

public class IOUtils {

    private static final Logger _ejbLogger =
            LogDomains.getLogger(IOUtils.class, LogDomains.EJB_LOGGER);

    private static J2EEObjectStreamFactory _streamFactory =
            new J2EEObjectStreamFactoryImpl();

    public static final void setJ2EEObjectStreamFactory(
            J2EEObjectStreamFactory  factory)
    {
        _streamFactory = factory;
    }
    
    public static ObjectInputStream createObjectInputStream(
	    final InputStream is, final boolean resolveObject,
	    final ClassLoader loader)
	throws Exception
    {
	    return _streamFactory.createObjectInputStream(is, resolveObject, loader);
    }

    public static ObjectOutputStream createObjectOutputStream(
	    final OutputStream os, final boolean replaceObject)
	throws IOException
    {
	return _streamFactory.createObjectOutputStream(os, replaceObject);
    }

    public static final byte[] serializeObject(Object obj, boolean replaceObject)
	throws java.io.NotSerializableException, java.io.IOException
    {
        byte[] data = null;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = null;
        try {
            oos = _streamFactory.createObjectOutputStream(
                bos, replaceObject);

            oos.writeObject(obj);
            oos.flush();
            data = bos.toByteArray();
        } catch (java.io.NotSerializableException notSerEx) {
            throw notSerEx;
        } catch (Exception th) {
            IOException ioEx = new IOException(th.toString());
            ioEx.initCause(th);
            throw ioEx;
        } finally {
            if (oos != null) {
                try { oos.close(); } catch (Exception ex) {}
            }
            try { bos.close(); } catch (Exception ex) {}
        }

	return data;
    }


     public static final Object deserializeObject(byte[] data, boolean resolveObject,
            ClassLoader appClassLoader) throws Exception {
          Object obj = null;
	ByteArrayInputStream bis = null;
	ObjectInputStream ois = null;
        try {
            bis = new ByteArrayInputStream(data);
            ois = _streamFactory.createObjectInputStream(bis, resolveObject,
		        appClassLoader);
            obj = ois.readObject();
        } catch (Exception ex) {
            _ejbLogger.log(Level.FINE, "Error during deserialization", ex);
            throw ex;
        } finally {
            try { ois.close(); } catch (Exception ex) {
                _ejbLogger.log(Level.FINEST, "Error during ois.close()", ex);
            }
            try { bis.close(); } catch (Exception ex) {
                _ejbLogger.log(Level.FINEST, "Error during bis.close()", ex);
            }
	    }
        return obj;

     }

}