1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.equation.ext;
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14 import org.simantics.db.Resource;
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15 import org.simantics.db.ReadGraph;
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16 import org.simantics.db.exception.DatabaseException;
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17 import org.simantics.equation.EquationResources;
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18 import org.simantics.equation.solver.ExpressionSolver;
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19 import org.simantics.equation.solver.Solver;
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20 import org.simantics.equation.stubs.EquationResource;
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22 public class SecondOrderScalarPolynomialSolver implements ExpressionSolver {
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24 public void evaluate(Solver solver, ReadGraph g, Resource t) throws DatabaseException {
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25 EquationResource eq = EquationResources.equationResource;
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27 double a = g.getRelatedValue(t, eq.HasA);
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28 double b = g.getRelatedValue(t, eq.HasB);
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29 double c = g.getRelatedValue(t, eq.HasC);
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31 double x = solver.getDoubleValue(g, g.getSingleObject(t, eq.HasSource));
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33 double r = a * x * x + b * x + c;
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35 solver.setValue(g.getSingleObject(t, eq.HasTarget), new double[] { r });
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