Mega Code Archive
Function that get the size of an object
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/*
*
* Copyright (C) 2011 Pierre Malarme
*
* Authors: Pierre Malarme <pmalarme at ulb.ac.be>
*
* Institution: Laboratory of Image Synthesis and Analysis (LISA)
* Faculty of Applied Science
* Universite Libre de Bruxelles (U.L.B.)
*
* Website: http://lisa.ulb.ac.be
*
* This file <Memory.java> is part of Droid Dicom Viewer.
*
* Droid Dicom Viewer 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.
*
* Droid Dicom Viewer 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 Droid Dicom Viewer. If not, see <http://www.gnu.org/licenses/>.
*
* Released date: 17-02-2011
*
* Version: 1.0
*
*/
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
/**
* Implements functions useful to check
* Memory usage.
*
* @author Pierre Malarme
* @version 1.0
*
*/
class Memory {
/**
* Function that get the size of an object.
*
* @param object
* @return Size in bytes of the object or -1 if the object
* is null.
* @throws IOException
*/
public static final int sizeOf(Object object) throws IOException {
if (object == null)
return -1;
// Special output stream use to write the content
// of an output stream to an internal byte array.
ByteArrayOutputStream byteArrayOutputStream =
new ByteArrayOutputStream();
// Output stream that can write object
ObjectOutputStream objectOutputStream =
new ObjectOutputStream(byteArrayOutputStream);
// Write object and close the output stream
objectOutputStream.writeObject(object);
objectOutputStream.flush();
objectOutputStream.close();
// Get the byte array
byte[] byteArray = byteArrayOutputStream.toByteArray();
// TODO can the toByteArray() method return a
// null array ?
return byteArray == null ? 0 : byteArray.length;
}
}
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