JavaDeserializer.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it). 
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


package org.openspcoop2.utils.serialization;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.Reader;
import java.io.StringReader;


/** 
 * Contiene utility per effettuare la serializzazione di un oggetto
 *
 * @author Poli Andrea (apoli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */

public class JavaDeserializer implements IDeserializer {

    @Override
    public Object getObject(String s, Class<?> classType) throws IOException {
        StringReader reader = new StringReader(s);
        return this.readObject(reader, classType);
    }

    @Override
    public Object readObject(InputStream is, Class<?> classType)
            throws IOException {
        ObjectInputStream ois = null;
        try{
            ois = new ObjectInputStream(is);
            Object o = ois.readObject();
            if(classType.isInstance(o)){
                return o;
            }else{
                throw new Exception("Oggetto deserializzato non e' di tipo ["+classType.getName()+"] bensi' di tipo ["+o.getClass().getName()+"]");
            }
        }catch(Exception e){
            throw new IOException(e.getMessage(),e);
        }finally{
            try{
                if(ois!=null){
                    ois.close();
                }
            }catch(Exception eClose){
                // close
            }
        }
    }

    @Override
    public Object readObject(Reader reader, Class<?> classType)
            throws IOException {
        ObjectInputStream ois = null;
        try{
            ByteArrayOutputStream bout = new ByteArrayOutputStream();
            int letti = 0;
            char[]buffer = new char[org.openspcoop2.utils.Utilities.DIMENSIONE_BUFFER];
            while( (letti = reader.read(buffer)) != -1 ){
                for(int i=0; i<letti; i++){
                    bout.write(buffer[i]);
                }
            }
            // NON FUNZIONA: org.openspcoop2.utils.CopyCharStream.copy(reader, bout);
            bout.flush();
            bout.close();
            
            ois = new ObjectInputStream(new ByteArrayInputStream(bout.toByteArray()));
            Object o = ois.readObject();
            if(classType.isInstance(o)){
                return o;
            }else{
                throw new Exception("Oggetto deserializzato non e' di tipo ["+classType.getName()+"] bensi' di tipo ["+o.getClass().getName()+"]");
            }
        }catch(Exception e){
            throw new IOException(e.getMessage(),e);
        }finally{
            try{
                if(ois!=null){
                    ois.close();
                }
            }catch(Exception eClose){
                // close
            }
        }
    }

    

}