AsLong.java

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/*
    Synthia, a data structure generator
    Copyright (C) 2019-2021 Laboratoire d'informatique formelle
    Université du Québec à Chicoutimi, Canada
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package ca.uqac.lif.synthia.util;
 
import ca.uqac.lif.synthia.Picker;
 
/**
 * Utility picker that converts an input into a long integer.
 * @author Sylvain Hallé
 * @ingroup API
 */
public class AsLong implements Picker<Long>
{
    /**
     * The picker from which to take the input objects.
     */
    protected Picker<?> m_picker;
    
    /**
     * Creates a new instance of the picker.
     * @param picker The picker from which to take the input objects
     */
    public AsLong(Picker<?> picker)
    {
        super();
        m_picker = picker;
    }
 
    @Override
    public Long pick()
    {
        Object o = m_picker.pick();
        if (o == null)
        {
            return 0L;
        }
        if (o instanceof Number)
        {
            return ((Number) o).longValue();
        }
        return 0L;
    }
 
    @Override
    public AsLong duplicate(boolean with_state)
    {
        return new AsLong(m_picker.duplicate(with_state));
    }
 
    @Override
    public void reset()
    {
        m_picker.reset();
    }
}