1 /*******************************************************************************
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2 * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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9 * VTT Technical Research Centre of Finland - initial API and implementation
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10 *******************************************************************************/
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11 package org.simantics.simulation.data;
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13 import java.util.ArrayList;
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14 import java.util.Collection;
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15 import java.util.Collections;
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16 import java.util.List;
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17 import java.util.Random;
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19 import org.simantics.databoard.Datatypes;
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20 import org.simantics.databoard.binding.Binding;
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21 import org.simantics.databoard.binding.NumberBinding;
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22 import org.simantics.databoard.binding.error.BindingException;
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23 import org.simantics.databoard.type.Datatype;
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24 import org.simantics.databoard.util.Bean;
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27 * Pseudo solver has three variables: Sine, Ramp and Random
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29 * Values are sampled in real time until the solver is disposed.
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31 * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
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33 public class PseudoSolver extends AbstractDatasource {
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35 public static String SINE = "Sine";
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36 public static String RAMP = "Ramp";
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37 public static String RANDOM = "Random";
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38 public static List<String> KEYS;
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46 public PseudoSolver() {
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48 random = new Random();
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52 public Collection<String> getVariables() {
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56 public void start() {
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57 thread = new Thread() {
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60 startTime = System.nanoTime();
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62 while (Thread.currentThread() == thread) {
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65 if (Thread.currentThread() != thread) return;
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66 for (int i=0; i<10; i++) {
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68 time = cycle * 0.01;
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74 try {Thread.sleep(15); } catch (InterruptedException e) {}
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81 public void stop() {
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91 public Datatype getType(String key) {
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92 //if (key.equals("Ramp")) return Datatypes.BOOLEAN;
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93 return Datatypes.DOUBLE;
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97 public Object getTime(NumberBinding binding) {
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99 return binding.create(time);
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100 } catch (BindingException e) {
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101 throw new RuntimeException(e);
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106 public VariableHandle openHandle(Bean item, String key, Binding valueBinding) {
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107 getValue(key, valueBinding);
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108 return new MyVariableHandle(key, valueBinding);
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111 public Object getValue(String key, Binding binding) {
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112 if (binding instanceof NumberBinding == false) throw new IllegalArgumentException("binding must be NumberBinding");
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113 NumberBinding nb = (NumberBinding) binding;
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115 if (key.equals(SINE)) {
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116 double value = Math.sin(time);
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117 return nb.create(value);
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118 } else if (key.equals(RAMP)) {
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119 boolean up = time - Math.floor(time) >= 0.5;
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120 double value = up ? 1.0 : 0.0;
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122 } else if (key.equals(RANDOM)) {
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123 return random.nextDouble()*10;
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125 } catch (BindingException e) {
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126 throw new RuntimeException(e);
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128 throw new RuntimeException("Unknown variable "+key);
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132 List<String> keys = new ArrayList<String>();
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136 KEYS = Collections.unmodifiableList( keys );
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139 class MyVariableHandle implements VariableHandle {
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144 public MyVariableHandle(String key, Binding b) {
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150 public String key() {
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155 public Binding binding() {
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160 public Object getValue() {
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161 return PseudoSolver.this.getValue(key, b);
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165 public void dispose() {
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