Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.simulation / src / org / simantics / simulation / data / PseudoSolver.java

diff --git a/bundles/org.simantics.simulation/src/org/simantics/simulation/data/PseudoSolver.java b/bundles/org.simantics.simulation/src/org/simantics/simulation/data/PseudoSolver.java
new file mode 100644 (file)
index 0000000..701b16a
--- /dev/null
+++ b/bundles/org.simantics.simulation/src/org/simantics/simulation/data/PseudoSolver.java
@@ -0,0 +1,170 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.simulation.data;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.List;\r
+import java.util.Random;\r
+\r
+import org.simantics.databoard.Datatypes;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.NumberBinding;\r
+import org.simantics.databoard.binding.error.BindingException;\r
+import org.simantics.databoard.type.Datatype;\r
+import org.simantics.databoard.util.Bean;\r
+\r
+/**\r
+ * Pseudo solver has three variables: Sine, Ramp and Random\r
+ * \r
+ * Values are sampled in real time until the solver is disposed.\r
+ *\r
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>\r
+ */\r
+public class PseudoSolver extends AbstractDatasource {\r
+       \r
+       public static String SINE = "Sine";\r
+       public static String RAMP = "Ramp";\r
+       public static String RANDOM = "Random";\r
+       public static List<String> KEYS;\r
+       \r
+       Thread thread;\r
+       long startTime;\r
+       double time;\r
+       Random random;\r
+       int cycle = 0;\r
+               \r
+       public PseudoSolver() {\r
+               super();                \r
+               random = new Random();\r
+       }\r
+       \r
+       @Override\r
+       public Collection<String> getVariables() {\r
+               return KEYS;\r
+       }\r
+       \r
+       public void start() {\r
+               thread = new Thread() {\r
+                       @Override\r
+                       public void run() {\r
+                               startTime = System.nanoTime();\r
+                               notifyStep();\r
+                               while (Thread.currentThread() == thread) {\r
+                                       writeLock.lock();\r
+                                       try {\r
+                                               if (Thread.currentThread() != thread) return;\r
+                                               for (int i=0; i<10; i++) {\r
+                                                       cycle++;\r
+                                                       time = cycle * 0.01;\r
+                                                       notifyStep();\r
+                                               }\r
+                                       } finally {\r
+                                               writeLock.unlock();\r
+                                       }\r
+                                       try {Thread.sleep(15); } catch (InterruptedException e) {}\r
+                               }\r
+                       }\r
+               };\r
+               thread.start();\r
+       }\r
+       \r
+       public void stop() {\r
+               writeLock.lock();\r
+               try {\r
+                       thread = null;\r
+               } finally {\r
+                       writeLock.unlock();\r
+               }\r
+       }\r
+       \r
+       @Override\r
+       public Datatype getType(String key) {\r
+               //if (key.equals("Ramp")) return Datatypes.BOOLEAN;\r
+               return Datatypes.DOUBLE;\r
+       }\r
+       \r
+       @Override\r
+       public Object getTime(NumberBinding binding) {\r
+               try {\r
+                       return binding.create(time);\r
+               } catch (BindingException e) {\r
+                       throw new RuntimeException(e);\r
+               }\r
+       }\r
+\r
+       @Override\r
+       public VariableHandle openHandle(Bean item, String key, Binding valueBinding) {\r
+               getValue(key, valueBinding);\r
+               return new MyVariableHandle(key, valueBinding);\r
+       }\r
+       \r
+       public Object getValue(String key, Binding binding) {\r
+               if (binding instanceof NumberBinding == false) throw new IllegalArgumentException("binding must be NumberBinding");\r
+               NumberBinding nb = (NumberBinding) binding;\r
+               try {\r
+                       if (key.equals(SINE)) {\r
+                               double value = Math.sin(time);\r
+                               return nb.create(value);\r
+                       } else if (key.equals(RAMP)) {\r
+                               boolean up = time - Math.floor(time) >= 0.5;\r
+                               double value = up ? 1.0 : 0.0; \r
+                               return value;                           \r
+                       } else if (key.equals(RANDOM)) {\r
+                               return random.nextDouble()*10;\r
+                       }\r
+               } catch (BindingException e) {\r
+                       throw new RuntimeException(e);\r
+               }\r
+               throw new RuntimeException("Unknown variable "+key);\r
+       }       \r
+       \r
+       static {\r
+               List<String> keys = new ArrayList<String>();\r
+               keys.add(SINE);\r
+               keys.add(RAMP);\r
+               keys.add(RANDOM);\r
+               KEYS = Collections.unmodifiableList( keys );\r
+       }\r
+       \r
+       class MyVariableHandle implements VariableHandle {\r
+\r
+               String key;             \r
+               Binding b;\r
+               \r
+               public MyVariableHandle(String key, Binding b) {\r
+                       this.b = b;\r
+                       this.key = key;\r
+               }\r
+\r
+               @Override\r
+               public String key() {\r
+                       return key;\r
+               }\r
+               \r
+               @Override\r
+               public Binding binding() {\r
+                       return b;\r
+               }\r
+\r
+               @Override\r
+               public Object getValue() {\r
+                       return PseudoSolver.this.getValue(key, b);\r
+               }\r
+\r
+               @Override\r
+               public void dispose() {\r
+               }\r
+               \r
+       }\r
+}\r
+\r