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KIE NIO.2 :: Model

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package org.kie.commons.java.nio.base;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.XStreamException;

/**
 *
 */
public class Properties extends HashMap {

    public Properties() {
    }

    public Properties( final Map original ) {
        putAll( original );
    }

    public Object put( final String key,
                       final Object value ) {
        if ( value == null ) {
            return remove( key );
        }
        return super.put( key, value );
    }

    public void store( final OutputStream out ) {
        store( out, true );
    }

    public void store( final OutputStream out,
                       boolean closeOnFinish ) {
        final XStream xstream = new XStream();
        xstream.toXML( this, out );
        if ( closeOnFinish ) {
            try {
                out.close();
            } catch ( IOException e ) {
            }
        }
    }

    public void load( final InputStream in ) {
        load( in, true );
    }

    public void load( final InputStream in,
                      boolean closeOnFinish ) {
        final XStream xstream = new XStream();
        final Properties temp = new Properties();
        try {
            xstream.fromXML( in, temp );
        } catch ( final XStreamException ex ) {
            if ( !ex.getMessage().equals( " : input contained no data" ) ) {
                throw ex;
            }
        }

        for ( final Map.Entry entry : temp.entrySet() ) {
            if ( entry.getValue() != null ) {
                put( entry.getKey(), entry.getValue() );
            }
        }
        temp.clear();
        if ( closeOnFinish ) {
            try {
                in.close();
            } catch ( IOException e ) {
            }
        }
    }

}