com.jaspersoft.jasperserver.core.util.TolerantObjectWrapper.java Source code

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Here is the source code for com.jaspersoft.jasperserver.core.util.TolerantObjectWrapper.java

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/*
 * Copyright (C) 2005 - 2014 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com.
 *
 * Unless you have purchased  a commercial license agreement from Jaspersoft,
 * the following license terms  apply:
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License  as
 * published by the Free Software Foundation, either version 3 of  the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero  General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public  License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.jaspersoft.jasperserver.core.util;

import org.apache.commons.io.output.NullOutputStream;
import org.apache.log4j.Logger;

import java.io.*;

/**
 * Wraps the objects that is stored in the session.
 * if the object is serializable then writes the object otherwise write MissingObject to the stream
 *
 * Created by nthapa on 7/18/13.
 */
public class TolerantObjectWrapper implements Serializable {

    protected final Logger log = Logger.getLogger(getClass());

    protected Object obj;

    public TolerantObjectWrapper(Object obj) {
        this.obj = obj;
    }

    public Object getObject() {
        return obj;
    }

    public void setObject(Object obj) {
        this.obj = obj;
    }

    @Override
    public String toString() {
        return obj.getClass().toString();

    }

    /**
     * tests whether an object is serializable
     *
     * return boolean representing if it is serializable
     *
     * */
    private boolean testIsSerializable(Object obj) throws IOException {

        NullOutputStream nos = new NullOutputStream();
        ObjectOutputStream oos = null;

        try {
            oos = new ObjectOutputStream(nos);
            oos.writeObject(obj);
            oos.close();
            nos.close();

        } catch (Exception err) {
            return false;
        }
        return true;
    }

    private void readObject(ObjectInputStream stream) throws ClassNotFoundException, IOException {

        obj = stream.readObject();
    }

    /*
    * Writes Object to stream if it is serializable else writes MissingObject to the Stream
    *
    * @param stream ObjectOutputStream
     */
    private void writeObject(ObjectOutputStream stream) throws ClassNotFoundException, IOException {
        if (testIsSerializable(obj)) {
            stream.writeObject(obj);
        } else {
            if (log.isDebugEnabled())
                log.debug("Non serialized object on session " + obj.getClass());
            stream.writeObject(new MissingObject("MissingValue"));
        }

    }
}