it.unibo.alchemist.model.implementations.actions.LsaChangeArgument.java Source code

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Here is the source code for it.unibo.alchemist.model.implementations.actions.LsaChangeArgument.java

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/*
 * Copyright (C) 2010-2014, Danilo Pianini and contributors
 * listed in the project's pom.xml file.
 * 
 * This file is part of Alchemist, and is distributed under the terms of
 * the GNU General Public License, with a linking exception, as described
 * in the file LICENSE in the Alchemist distribution's top directory.
 */
package it.unibo.alchemist.model.implementations.actions;

import it.unibo.alchemist.expressions.implementations.ConstTreeNode;
import org.apache.commons.math3.random.RandomGenerator;
import it.unibo.alchemist.model.interfaces.Environment;
import it.unibo.alchemist.model.interfaces.ILsaMolecule;
import it.unibo.alchemist.model.interfaces.ILsaNode;
import org.danilopianini.lang.HashString;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

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

/**
 */
public class LsaChangeArgument extends SAPERELocalAgent {

    private static final long serialVersionUID = -7128058274012426458L;
    private static final HashString OLD = new HashString("OldType");
    private final Environment<List<ILsaMolecule>> env;
    @SuppressFBWarnings(value = "SE_BAD_FIELD", justification = "All provided RandomGenerator implementations are actually Serializable")
    private final RandomGenerator rnd;
    private final HashString newTargetVar;
    private final String[] listT;

    /**
     * Builds a new action that test neighbors which contain in their lsaSpace
     * an lsaMolecule matching <target,Type>. The effect of this Action is to
     * add to the matches map the variable PreferredType (the most present type
     * in neighborhood). The execution has no effect on influenced molecule of
     * reaction.
     * 
     * 
     * @param environment
     *            The environment to use
     * @param node
     *            The source node
     * @param listTarget
     *            Gradients list
     * @param targetVariab
     *            Variable name
     * @param random
     *            Random engine
     */
    public LsaChangeArgument(final Environment<List<ILsaMolecule>> environment, final ILsaNode node,
            final String[] listTarget, final String targetVariab, final RandomGenerator random) {
        super(node);
        rnd = random;
        env = environment;
        newTargetVar = new HashString(targetVariab);
        listT = Arrays.copyOf(listTarget, listTarget.length);
    }

    @Override
    public void execute() {
        final List<String> listTarg = new ArrayList<String>();
        for (int i = 0; i < listT.length; i++) {
            listTarg.add(listT[i]);
        }
        final String oldType = getMatches().get(OLD).toString();
        if (!listTarg.remove(oldType)) {
            throw new IllegalStateException("Cannot remove " + oldType + " from " + listTarg);
        }
        if (!listTarg.isEmpty()) {
            final String newTarg = listTarg.get((int) (listTarg.size() * rnd.nextDouble()));
            addMatch(newTargetVar, new ConstTreeNode(new HashString(newTarg)));
        }
    }

    @Override
    public String toString() {
        return "Find " + newTargetVar;
    }

    /**
     * @return the current environment
     */
    protected Environment<List<ILsaMolecule>> getEnvironment() {
        return env;
    }

    /**
     * @return a random integer
     */
    protected double random() {
        return rnd.nextInt();
    }

}