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javaFMI is a Java Library for the functional mock-up interface (or FMI). FMI defines a standardized interface to be used in computer simulations. The FMI Standard has beed developed by a large number of software companies and research centers that have worked in a cooperation project under the name of MODELISAR. This library addresses the connection of a java application with a FMU (functional mock-up unit).

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/*
 *  Copyright 2013-2016 SIANI - ULPGC
 *
 *  This File is part of JavaFMI Project
 *
 *  JavaFMI Project 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.
 *
 *  JavaFMI Project 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 JavaFMI. If not, see .
 */

package org.javafmi.wrapper.variables;


import org.javafmi.modeldescription.ModelDescription;
import org.javafmi.modeldescription.ScalarVariable;
import org.javafmi.proxy.FmiProxy;
import org.javafmi.proxy.Status;
import org.javafmi.wrapper.Variable;

public class VariableWriter {

    private final ModelDescription modelDescription;
    private FmiProxy fmiProxy;

    public VariableWriter(FmiProxy fmiProxy, ModelDescription modelDescription) {
        this.fmiProxy = fmiProxy;
        this.modelDescription = modelDescription;
    }

    public Status write(String name, Object value) {
        ScalarVariable modelVariable = modelDescription.getModelVariable(name);
        int valueReference = modelVariable.getValueReference();
        switch (modelVariable.getTypeName()) {
            case "Real":
                return fmiProxy.setReal(new int[]{valueReference}, new double[]{getDoubleValue(value)});
            case "Integer":
                return fmiProxy.setInteger(new int[]{valueReference}, new int[]{getIntValue(value)});
            case "Boolean":
                return fmiProxy.setBoolean(new int[]{valueReference}, new boolean[]{getBooleanValue(value)});
            case "String":
                return fmiProxy.setString(new int[]{valueReference}, new String[]{getStringValue(value)});
            default:
                break;
        }
        return Status.ERROR;
    }

    public void write(Variable... variablesToWrite) {
        double[] values = extractValues(variablesToWrite);
        int[] valueReferences = modelDescription.getValueReferences(extractNames(variablesToWrite));
        fmiProxy.setReal(valueReferences, values);
    }

    private String[] extractNames(Variable[] variablesToWrite) {
        String[] names = new String[variablesToWrite.length];
        for (int i = 0; i < names.length; i++) {
            names[i] = variablesToWrite[i].getName();
        }
        return names;
    }

    private double[] extractValues(Variable[] variablesToWrite) {
        double[] values = new double[variablesToWrite.length];
        for (int i = 0; i < values.length; i++) {
            values[i] = (Double) variablesToWrite[i].getValue();
        }
        return values;
    }

    private double getDoubleValue(Object value) {
        return Double.parseDouble(getStringValue(value));
    }

    private Integer getIntValue(Object value) {
        return Integer.parseInt(getStringValue(value));
    }

    private Boolean getBooleanValue(Object value) {
        return Boolean.parseBoolean(getStringValue(value));
    }

    private String getStringValue(Object value) {
        return String.valueOf(value);
    }
}