Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.modeling.ui / src / org / simantics / modeling / ui / expression / BasicExpressionVisitor.java

diff --git a/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/expression/BasicExpressionVisitor.java b/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/expression/BasicExpressionVisitor.java
new file mode 100644 (file)
index 0000000..f735f71
--- /dev/null
+++ b/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/expression/BasicExpressionVisitor.java
@@ -0,0 +1,159 @@
+package org.simantics.modeling.ui.expression;\r
+\r
+import java.util.HashMap;\r
+import java.util.Stack;\r
+\r
+import org.simantics.basicexpression.analysis.DepthFirstAdapter;\r
+import org.simantics.basicexpression.node.AAddressValue;\r
+import org.simantics.basicexpression.node.AConstantValue;\r
+import org.simantics.basicexpression.node.ADivMultiplicative;\r
+import org.simantics.basicexpression.node.AFunctionPrimary;\r
+import org.simantics.basicexpression.node.AMinusExpression;\r
+import org.simantics.basicexpression.node.AMultMultiplicative;\r
+import org.simantics.basicexpression.node.APlusExpression;\r
+import org.simantics.basicexpression.node.ARangeValue;\r
+import org.simantics.basicexpression.node.ARviValue;\r
+import org.simantics.basicexpression.node.ASequenceArgList;\r
+import org.simantics.basicexpression.node.ASingleArgList;\r
+import org.simantics.basicexpression.node.AStringValue;\r
+import org.simantics.basicexpression.node.PArgList;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.adapter.Function;\r
+import org.simantics.db.layer0.variable.Variable;\r
+\r
+public class BasicExpressionVisitor extends DepthFirstAdapter {\r
+\r
+    public static final boolean DEBUG_APPLICATION = false;\r
+    \r
+       public static class ApplicationException extends Exception {\r
+\r
+               private static final long serialVersionUID = 1L;\r
+\r
+               public ApplicationException(String message) {\r
+                       super(message);\r
+               }\r
+\r
+       }\r
+\r
+       final ReadGraph graph;\r
+       final Variable property;\r
+       \r
+       Stack<Object> stack = new Stack<Object>();\r
+\r
+       HashMap<String, Function> builtins = new HashMap<String, Function>();\r
+\r
+       public BasicExpressionVisitor(ReadGraph graph, Variable property) {\r
+\r
+               this.graph = graph;\r
+               this.property = property;\r
+               \r
+       }\r
+\r
+       public Object getResult() {\r
+               return stack.pop();\r
+       }\r
+\r
+       public void outAConstantValue(AConstantValue node) {\r
+               // System.out.println("eval constant " + node);\r
+               stack.push(Double.valueOf(node.toString()));\r
+       }\r
+\r
+       public void outAStringValue(AStringValue node) {\r
+\r
+               try {\r
+                       String value = node.toString();\r
+                       String rvi = value.substring(1, value.length() - 2).trim(); \r
+                       Variable relative = property.browse(graph, rvi);\r
+                       stack.push(relative.getValue(graph));\r
+               } catch (DatabaseException e) {\r
+                       stack.push(e);\r
+               }\r
+               \r
+       }\r
+\r
+       @Override\r
+       public void outARviValue(ARviValue node) {\r
+               \r
+               try {\r
+                       String value = node.toString();\r
+                       String rvi = value.trim(); \r
+//                     System.out.println("property=" + property.getURI(graph) + " " + property);\r
+//                     System.out.println("rvi=" + rvi);\r
+                       Variable relative = property.browse(graph, rvi);\r
+//                     System.out.println("relative=" + relative.getURI(graph));\r
+                       Object valueObject = relative.getValue(graph); \r
+//                     System.out.println("relative2=" + relative.getURI(graph) + " -> " + valueObject);\r
+                       stack.push(valueObject);\r
+               } catch (DatabaseException e) {\r
+                       stack.push(e);\r
+               }\r
+               \r
+       }\r
+       \r
+       public void outAAddressValue(AAddressValue node) {\r
+               stack.push('&' + node.getRange().toString());\r
+       }\r
+\r
+       public void outARangeValue(ARangeValue node) {\r
+       }\r
+\r
+       private double extractValue(Object o) {\r
+               if (o instanceof Number) {\r
+                       return ((Number) o).doubleValue();\r
+               } else if (o instanceof String) {\r
+                       return Double.valueOf((String) o);\r
+               } else {\r
+                       return Double.NaN;\r
+               }\r
+       }\r
+\r
+       public void outAPlusExpression(APlusExpression node) {\r
+               Object o1 = stack.pop();\r
+               Object o2 = stack.pop();\r
+               double d1 = extractValue(o1);\r
+               double d2 = extractValue(o2);\r
+               stack.push(d1 + d2);\r
+               // System.out.println("plus " + d1 + " " + d2);\r
+       }\r
+\r
+       public void outAMinusExpression(AMinusExpression node) {\r
+               Object o2 = stack.pop();\r
+               Object o1 = stack.pop();\r
+               double d1 = extractValue(o1);\r
+               double d2 = extractValue(o2);\r
+//             System.out.println("minus " + d1 + " " + d2);\r
+               stack.push(d1 - d2);\r
+       }\r
+\r
+       public void outAMultMultiplicative(AMultMultiplicative node) {\r
+               Object o1 = stack.pop();\r
+               Object o2 = stack.pop();\r
+               double d1 = extractValue(o1);\r
+               double d2 = extractValue(o2);\r
+               stack.push(d1 * d2);\r
+               // System.out.println("mult " + d1 + " " + d2);\r
+       }\r
+       \r
+       @Override\r
+       public void outADivMultiplicative(ADivMultiplicative node) {\r
+               Object o1 = stack.pop();\r
+               Object o2 = stack.pop();\r
+               double d1 = extractValue(o1);\r
+               double d2 = extractValue(o2);\r
+               stack.push(d2 / d1);\r
+       }\r
+\r
+       int countArguments(PArgList args) {\r
+               if (args == null)\r
+                       return 0;\r
+               if (args instanceof ASingleArgList)\r
+                       return 1;\r
+               ASequenceArgList seq = (ASequenceArgList) args;\r
+               return 1 + countArguments(seq.getArgList());\r
+       }\r
+\r
+       public void outAFunctionPrimary(AFunctionPrimary node) {\r
+       }\r
+\r
+}\r