RandomSuffix.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.string;
 
import ca.uqac.lif.synthia.Picker;
import ca.uqac.lif.synthia.Shrinkable;
import ca.uqac.lif.synthia.random.RandomInteger;
import ca.uqac.lif.synthia.util.NothingPicker;
 
/**
 * Just like {@link RandomPrefix} but for suffixes.
 * @author Marc-Antoine Plourde
 * @ingroup API
 */
public class RandomSuffix extends RandomPrefix
{
 
    public RandomSuffix(String string)
    {
        super(string);
    }
 
    private RandomSuffix(String string, RandomInteger prefix_size)
    {
        super(string, prefix_size);
    }
 
    @Override
    public Shrinkable<String> shrink(String element, Picker<Float> decision, float magnitude)
    {
        if(element.isEmpty())
        {
            return new NothingPicker<>();
        }
        return new RandomSuffix(element, m_prefixSize.duplicate(true));
    }
 
    @Override
    public String pick()
    {
        return m_string.substring(m_prefixSize.pick(), m_string.length());
    }
 
    @Override
    public RandomSuffix duplicate(boolean with_state)
    {
        return new RandomSuffix(m_string, m_prefixSize.duplicate(with_state));
    }
 
}