package org.simantics.modeling;
-import java.util.Stack;
-
import org.simantics.basicexpression.Expressions;
-import org.simantics.basicexpression.analysis.DepthFirstAdapter;
-import org.simantics.basicexpression.node.AConstantValue;
-import org.simantics.basicexpression.node.ADivMultiplicative;
-import org.simantics.basicexpression.node.AMultMultiplicative;
-import org.simantics.basicexpression.node.APlusExpression;
-import org.simantics.basicexpression.node.AVariablePrimary;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.utils.datastructures.Pair;
import org.simantics.utils.datastructures.Triple;
-public class InvertBasicExpressionVisitor extends DepthFirstAdapter {
-
- Stack<Object> stack = new Stack<Object>();
-
- public Object getResult() {
- if(stack.size() != 1) return null;
- return stack.pop();
- }
-
- public void outAConstantValue(AConstantValue node) {
- stack.push(Double.valueOf(node.toString()));
- }
-
- @Override
- public void outAVariablePrimary(AVariablePrimary node) {
- String value = node.toString().trim();
- stack.push(Triple.make(1.0, 0.0, value));
- }
-
- @SuppressWarnings("unchecked")
- public void outAPlusExpression(APlusExpression node) {
-
- final Object o1 = stack.pop();
- final Object o2 = stack.pop();
-
- if(o1 instanceof Double && o2 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double, Double, String>)o2;
- stack.push(Triple.make(p.first, p.second + (Double)o1, p.third));
- } else if (o2 instanceof Double && o1 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double, Double, String>)o1;
- stack.push(Triple.make(p.first, p.second + (Double)o2, p.third));
- } else if (o2 instanceof Double && o1 instanceof Double) {
- stack.push((Double)o1 + (Double)o2);
- } else {
- stack.push(Double.NaN);
- }
-
- }
-
- @SuppressWarnings("unchecked")
- public void outAMinusExpression(APlusExpression node) {
-
- final Object o1 = stack.pop();
- final Object o2 = stack.pop();
-
- if(o1 instanceof Double && o2 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double, Double, String>)o2;
- stack.push(Triple.make(-p.first, (Double)o1 - p.second, p.third ));
- } else if (o2 instanceof Double && o1 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double, Double, String>)o1;
- stack.push(Triple.make(p.first, p.second - (Double)o2, p.third));
- } else if (o2 instanceof Double && o1 instanceof Double) {
- stack.push((Double)o1 - (Double)o2);
- } else {
- stack.push(Double.NaN);
- }
-
- }
-
- @SuppressWarnings("unchecked")
- public void outAMultMultiplicative(AMultMultiplicative node) {
-
- final Object o1 = stack.pop();
- final Object o2 = stack.pop();
-
- if(o1 instanceof Double && o2 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double, Double, String>)o2;
- stack.push(Triple.make(p.first * (Double)o1, p.second * (Double)o1, p.third));
- } else if (o2 instanceof Double && o1 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double, Double, String>)o1;
- stack.push(Triple.make(p.first * (Double)o2, p.second * (Double)o2, p.third));
- } else if (o2 instanceof Double && o1 instanceof Double) {
- stack.push((Double)o1 * (Double)o2);
- } else {
- stack.push(Double.NaN);
- }
-
- }
-
- @SuppressWarnings("unchecked")
- public void outADivMultiplicative(ADivMultiplicative node) {
-
- final Object o1 = stack.pop();
- final Object o2 = stack.pop();
-
- if(o1 instanceof Double && o2 instanceof Triple) {
- stack.push(Double.NaN);
- } else if (o2 instanceof Double && o1 instanceof Triple) {
- Triple<Double, Double, String> p = (Triple<Double,Double, String>)o1;
- stack.push(Triple.make(p.first / (Double)o2, p.second / (Double)o2, p.third));
- } else if (o2 instanceof Double && o1 instanceof Double) {
- stack.push((Double)o1 / (Double)o2);
- } else {
- stack.push(Double.NaN);
- }
-
- }
+public class InvertBasicExpressionVisitor extends InvertBasicExpressionVisitorBase {
private static final String MAGIC = "_111_";
-
+
private static String replaced(String expression) {
return expression.replaceAll("\\.([A-Za-z])", MAGIC + "$1");
}
-
+
public static void invert(WriteGraph graph, Variable base, String expression, Object value) throws DatabaseException {
InvertBasicExpressionVisitor visitor = new InvertBasicExpressionVisitor();
Expressions.evaluate(replaced(expression), visitor);