gnusmail.filters.SingleNumericAttFilter.java Source code

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Here is the source code for gnusmail.filters.SingleNumericAttFilter.java

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/*
 * Copyright 2011 Universidad de Mlaga.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Universidad de Mlaga, 29071 Malaga, Spain or visit
 * www.uma.es if you need additional information or have any questions.
 * 
 */
package gnusmail.filters;

import gnusmail.datasource.Document;

import java.util.ArrayList;
import java.util.List;

import javax.mail.MessagingException;

import weka.core.Attribute;
import weka.core.Instance;

public abstract class SingleNumericAttFilter extends Filter {

    private Attribute attribute;

    public SingleNumericAttFilter() {
        attribute = new Attribute(this.getName());
    }

    @Override
    public List<Attribute> getAttributes() {
        ArrayList<Attribute> attList = new ArrayList<Attribute>();
        attList.add(attribute);
        return attList;
    }

    @Override
    public void updateAttValues(Document doc) {
    }

    @Override
    public void updateInstance(Instance inst, Document doc) {
        try {
            inst.setValue(attribute, getSingleValue(doc));
        } catch (MessagingException e) {
            inst.setMissing(attribute);
        }
    }

    protected abstract double getSingleValue(Document doc) throws MessagingException;

}