jasima.core.util.converter.DblDistributionFactory.java Source code

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Here is the source code for jasima.core.util.converter.DblDistributionFactory.java

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/*******************************************************************************
 * This file is part of jasima, v1.3, the Java simulator for manufacturing and 
 * logistics.
 *  
 * Copyright (c) 2015       jasima solutions UG
 * Copyright (c) 2010-2015 Torsten Hildebrandt and jasima contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package jasima.core.util.converter;

import jasima.core.random.continuous.DblDistribution;
import jasima.core.random.continuous.DblStream;
import jasima.core.util.ArgListTokenizer;
import jasima.core.util.ArgListTokenizer.TokenType;
import jasima.core.util.Util;
import jasima.core.util.converter.TypeConverterDblStream.StreamFactory;

import java.util.ArrayList;

import org.apache.commons.math3.distribution.ExponentialDistribution;

public class DblDistributionFactory implements StreamFactory {

    private static final String[] PREFIXES = { "dblExp", DblDistribution.class.getName() };

    public DblDistributionFactory() {
        super();
    }

    @Override
    public String[] getTypePrefixes() {
        return PREFIXES;
    }

    @Override
    public DblStream stringToStream(ArgListTokenizer tk) {
        TypeToStringConverter doubleConv = TypeToStringConverter.lookupConverter(Double.class);
        assert doubleConv != null;

        String prefix = tk.currTokenText();

        tk.assureTokenTypes(tk.nextTokenNoWhitespace(), TokenType.PARENS_OPEN);

        ArrayList<Double> values = new ArrayList<Double>();

        // there has to be at least one value
        Double v1 = doubleConv.fromString(tk, Double.class, prefix, this.getClass().getClassLoader(),
                Util.DEF_CLASS_SEARCH_PATH);
        values.add(v1);

        tk.assureTokenTypes(tk.nextTokenNoWhitespace(), TokenType.PARENS_CLOSE);

        return new DblDistribution(new ExponentialDistribution(v1.doubleValue()));
    }

    @Override
    public String streamToString(DblStream s) {
        DblDistribution dist = (DblDistribution) s;
        assert dist.getDistribution() instanceof ExponentialDistribution;

        TypeToStringConverter doubleConv = TypeToStringConverter.lookupConverter(Double.class);
        assert doubleConv != null;

        StringBuilder sb = new StringBuilder();
        sb.append(PREFIXES[0]).append('(');

        double v = ((ExponentialDistribution) dist.getDistribution()).getMean();
        sb.append(doubleConv.toString(v));

        sb.setCharAt(sb.length() - 1, ')');

        return sb.toString();
    }

}