예제 #1
0
  protected final void compute() {

    size = inputList.size();

    if (!inputList.isDefined()) {
      outputList.setUndefined();
      return;
    }

    outputList.setDefined(true);
    outputList.clear();

    if (size == 0) return;
    // <Zbynek Konecny 2010-05-13>
    /*
     * If val is not numeric, we use the underlying Expression of the function and
     * plug the list element as variable.
     * Deep copy is needed so that we can plug the value repeatedly.
     */
    FunctionVariable var = boolFun.getFunction().getFunctionVariable();
    for (int i = 0; i < size; i++) {
      GeoElement geo = inputList.get(i);
      if (geo.isGeoNumeric()) {
        if (boolFun.evaluateBoolean(((GeoNumeric) geo).getValue()))
          outputList.add(geo.copyInternal(cons));
        ;
      } else {
        ExpressionNode ex = (ExpressionNode) boolFun.getFunction().getExpression().deepCopy(kernel);
        ex.replaceAndWrap(var, geo.evaluate());
        if (((MyBoolean) ex.evaluate()).getBoolean()) outputList.add(geo.copyInternal(cons));
        ;
      }
    }
    // </Zbynek>
  }
예제 #2
0
 /**
  * Parses given String str and tries to evaluate it to a double. Returns Double.NaN if something
  * went wrong.
  */
 public double evaluateToDouble(String str, boolean suppressErrors) {
   try {
     ValidExpression ve = parser.parseExpression(str);
     ExpressionNode en = (ExpressionNode) ve;
     en.resolveVariables();
     NumberValue nv = (NumberValue) en.evaluate();
     return nv.getDouble();
   } catch (Exception e) {
     e.printStackTrace();
     if (!suppressErrors) app.showError("InvalidInput", str);
     return Double.NaN;
   } catch (MyError e) {
     e.printStackTrace();
     if (!suppressErrors) app.showError(e);
     return Double.NaN;
   } catch (Error e) {
     e.printStackTrace();
     if (!suppressErrors) app.showError("InvalidInput", str);
     return Double.NaN;
   }
 }
  // evaluate the current value of the arithmetic tree
  protected final void compute() {
    // get resulting list of ExpressionNodes
    ExpressionValue evlist = root.evaluate();
    MyList myList = (evlist instanceof MyList) ? (MyList) evlist : ((GeoList) evlist).getMyList();

    int evalListSize = myList.size();
    int cachedListSize = list.getCacheSize();

    list.clear();
    for (int i = 0; i < evalListSize; i++) {
      ExpressionValue element = myList.getListElement(i).evaluate();
      GeoElement geo = null;

      // number result
      if (element.isNumberValue()) {
        double val = ((NumberValue) element).getDouble();

        // try to use cached element of same type
        if (i < cachedListSize) {
          GeoElement cachedGeo = list.getCached(i);

          // the cached element is a number: set value
          if (cachedGeo.isGeoNumeric()) {
            ((GeoNumeric) cachedGeo).setValue(val);
            geo = cachedGeo;
          }
        }

        // no cached number: create new one
        if (geo == null) {
          geo = new GeoNumeric(cons, val);
        }

        // add number to list
        list.add(geo);
      }

      // point
      else if (element.isVectorValue()) {
        GeoVec2D vec = ((VectorValue) element).getVector();

        // try to use cached element of same type
        if (i < cachedListSize) {
          GeoElement cachedGeo = list.getCached(i);

          // the cached element is a point: set value
          if (cachedGeo.isGeoPoint()) {
            ((GeoPoint) cachedGeo).setCoords(vec);
            geo = cachedGeo;
          }
        }

        // no cached point: create new one
        if (geo == null) {
          GeoPoint point = new GeoPoint(cons);
          point.setCoords(vec);
          geo = point;
        }

        // add point to list
        list.add(geo);
      }

      // needed for matrix multiplication
      // eg {{1,3,5},{2,4,6}}*{{11,14},{12,15},{13,a}}
      else if (element instanceof MyList) {
        MyList myList2 = (MyList) element;
        GeoList list2 = new GeoList(cons);
        list2.clear();

        /* removed Michael Borcherds 20080602
         * bug: 9PointCubic.ggb (matrix multiplication)
        // try to use cached element of  type GeoList
        GeoList list2 = null;
        if (i < cachedListSize) {
        	GeoElement cachedGeo = list.getCached(i);

        	// the cached element is a number: set value
        	if (cachedGeo.isGeoList()) {
        		list2 = (GeoList) cachedGeo;
        	}
        }

        if (list2 == null) {
        	list2 = new GeoList(cons);
        } */

        for (int j = 0; j < myList2.size(); j++) {
          ExpressionValue en = myList2.getListElement(j);
          ExpressionValue ev = en.evaluate();

          if (ev instanceof MyDouble) {
            GeoNumeric geo2 = new GeoNumeric(cons);
            geo2.setValue(((NumberValue) ev).getDouble());
            list2.add(geo2);
          }
        }

        list.add(list2);
      } else if (element instanceof MyStringBuffer) {
        MyStringBuffer str = (MyStringBuffer) element;
        // try to use cached element of same type
        if (i < cachedListSize) {
          GeoElement cachedGeo = list.getCached(i);

          // the cached element is a point: set value
          if (cachedGeo.isGeoText()) {
            ((GeoText) cachedGeo).setTextString(str.toValueString());
            geo = cachedGeo;
          }
        }

        // no cached point: create new one
        if (geo == null) {
          GeoText text = new GeoText(cons);
          text.setTextString(str.toValueString());
          geo = text;
        }

        // add point to list
        list.add(geo);
      } else if (element instanceof MyBoolean) {
        MyBoolean bool = (MyBoolean) element;
        // try to use cached element of same type
        if (i < cachedListSize) {
          GeoElement cachedGeo = list.getCached(i);

          // the cached element is a point: set value
          if (cachedGeo.isGeoBoolean()) {
            ((GeoBoolean) cachedGeo).setValue(bool.getBoolean());
            geo = cachedGeo;
          }
        }

        // no cached point: create new one
        if (geo == null) {
          GeoBoolean geoBool = new GeoBoolean(cons);
          geoBool.setValue(bool.getBoolean());
          geo = geoBool;
        }

        // add point to list
        list.add(geo);
      } else if (element instanceof GeoFunction) {
        GeoFunction fun = (GeoFunction) element;
        if (i < cachedListSize) {
          GeoElement cachedGeo = list.getCached(i);

          // the cached element is a point: set value
          if (cachedGeo.isGeoFunction()) {
            ((GeoFunction) cachedGeo).set(fun);
            geo = cachedGeo;
          }
        }

        // no cached point: create new one
        if (geo == null) {
          GeoFunction geoFun = new GeoFunction(cons);
          geoFun.set(fun);
          geo = geoFun;
        }
        list.add(geo);

      } else {
        Application.debug("unsupported list addition: " + element.getClass() + "");
      }
    }
  }
예제 #4
0
  public GeoElement[] processExpressionNode(ExpressionNode n) throws MyError {
    // command is leaf: process command
    if (n.isLeaf()) {
      ExpressionValue leaf = n.getLeft();
      if (leaf instanceof Command) {
        Command c = (Command) leaf;
        c.setLabels(n.getLabels());
        return cmdDispatcher.processCommand(c, true);
      } else if (leaf instanceof Equation) {
        Equation eqn = (Equation) leaf;
        eqn.setLabels(n.getLabels());
        return processEquation(eqn);
      } else if (leaf instanceof Function) {
        Function fun = (Function) leaf;
        fun.setLabels(n.getLabels());
        return processFunction(n, fun);
      } else if (leaf instanceof FunctionNVar) {
        FunctionNVar fun = (FunctionNVar) leaf;
        fun.setLabels(n.getLabels());
        return processFunctionNVar(n, fun);
      }
    }

    // ELSE:  resolve variables and evaluate expressionnode
    n.resolveVariables();
    eval = n.evaluate();
    boolean dollarLabelFound = false;

    ExpressionNode myNode = n;
    if (myNode.isLeaf()) myNode = myNode.getLeftTree();
    // leaf (no new label specified): just return the existing GeoElement
    if (eval.isGeoElement()
        && n.getLabel() == null
        && !(n.operation.equals(Operation.ELEMENT_OF))) {
      // take care of spreadsheet $ names: don't loose the wrapper ExpressionNode here
      // check if we have a Variable
      switch (myNode.getOperation()) {
        case $VAR_COL:
        case $VAR_ROW:
        case $VAR_ROW_COL:
          // don't do anything here: we need to keep the wrapper ExpressionNode
          // and must not return the GeoElement here
          dollarLabelFound = true;
          break;

        default:
          // return the GeoElement
          GeoElement[] ret = {(GeoElement) eval};
          return ret;
      }
    }

    if (eval.isBooleanValue()) return processBoolean(n, eval);
    else if (eval.isNumberValue()) return processNumber(n, eval);
    else if (eval.isVectorValue()) return processPointVector(n, eval);
    else if (eval.isVector3DValue()) return processPointVector3D(n, eval);
    else if (eval.isTextValue()) return processText(n, eval);
    else if (eval instanceof MyList) {
      return processList(n, (MyList) eval);
    } else if (eval instanceof Function) {
      return processFunction(n, (Function) eval);
    } else if (eval instanceof FunctionNVar) {

      return processFunctionNVar(n, (FunctionNVar) eval);
    }
    // we have to process list in case list=matrix1(1), but not when list=list2
    else if (eval instanceof GeoList && myNode.hasOperations()) {
      Application.debug("should work");
      return processList(n, ((GeoList) eval).getMyList());
    } else if (eval.isGeoElement()) {

      // e.g. B1 = A1 where A1 is a GeoElement and B1 does not exist yet
      // create a copy of A1
      if (n.getLabel() != null || dollarLabelFound) {
        return processGeoCopy(n.getLabel(), n);
      }
    }

    // REMOVED due to issue 131: http://code.google.com/p/geogebra/issues/detail?id=131
    //		// expressions like 2 a (where a:x + y = 1)
    //		// A1=b doesn't work for these objects
    //		else if (eval instanceof GeoLine) {
    //			if (((GeoLine)eval).getParentAlgorithm() instanceof AlgoDependentLine) {
    //				GeoElement[] ret = {(GeoElement) eval };
    //				return ret;
    //			}
    //
    //		}

    // if we get here, nothing worked
    Application.debug("Unhandled ExpressionNode: " + eval + ", " + eval.getClass());
    return null;
  }