/**
* This method exists to make it easier to see when and where classes are changing the formula
* This also serves another purpose by adding spaces and formatting when needed, something that
* the normal setFormula() method cannot do.
*
* @param op
*/
public void addToFormula(char op) throws SyntaxErrorException {
// if the cell to add the operator in does not exist yet, create it
if ((opList == null) || (nextEntry >= opList.size())) opList.add(new TreeCell());
TreeCell currentCell = opList.get(nextEntry); // get the current cell that we will be using
try {
if (((op == '/') || (op == '*')) && (nextEntry > 0)) {
if ((opList.get(nextEntry).getleftSon() == null)
&& (opList.get(nextEntry - 1).getcellValue().length() == 1)) {
opList.remove(nextEntry);
nextEntry--;
currentCell = opList.get(nextEntry);
currentCell.addOpAndReform(op);
} else if ((opList.get(nextEntry).getcellValue() == null)
&& (opList.get(nextEntry - 1).getcellValue().length() >= 1)) {
// this is the first operator to be entered, the first entry being an input.
opList.remove(nextEntry);
nextEntry--;
currentCell = opList.get(nextEntry);
currentCell.setleftSon(new TreeCell(currentCell.getcellValue()));
currentCell.setrightSon(null);
currentCell.setcellValue(op + "");
currentCell.setstatusCell(TreeCell.LEFT_COMPLETED);
}
} else {
currentCell.addOpInCell(op);
}
} catch (SyntaxErrorException e) {
throw e;
}
}
/**
* method will set the current cell to all the values of the leftSon, causing the leftSon to
* replace the currentCell
*/
public void swapWithLeftSon() {
setrightSon(leftSon.getrightSon());
setcellValue(leftSon.getcellValue());
setstatusCell(leftSon.getstatusCell());
setleftSon(leftSon.getleftSon());
}
/*
* Checks if formula made matches a passed formula
* @param correctFormula: The formula to be compared
*/
public boolean checkFormulaCorrect(Formula correctFormula) {
Formula goodF, userF;
try {
goodF = new Formula(correctFormula);
userF = new Formula(this);
if (goodF.opList.size() > 0) {
TreeCell firstCell = goodF.opList.get(0);
if ((firstCell.getcellValue().length() > 1)
|| (firstCell.getcellValue().charAt(0) == '*')
|| (firstCell.getcellValue().charAt(0) == '/')) {
TreeCell topCell = new TreeCell("+");
topCell.setleftSon(null);
topCell.setrightSon(firstCell);
if (firstCell.getstatusCell() == TreeCell.RIGHT_COMPLETED)
topCell.setstatusCell(TreeCell.RIGHT_COMPLETED);
else topCell.setstatusCell(TreeCell.LEFT_COMPLETED);
goodF.opList.set(0, topCell);
}
}
if (userF.opList.size() > 0) {
TreeCell firstCell = userF.opList.get(0);
if ((firstCell.getcellValue().length() > 1)
|| (firstCell.getcellValue().charAt(0) == '*')
|| (firstCell.getcellValue().charAt(0) == '/')) {
TreeCell topCell = new TreeCell("+");
topCell.setleftSon(null);
topCell.setrightSon(firstCell);
if (firstCell.getstatusCell() == TreeCell.RIGHT_COMPLETED)
topCell.setstatusCell(TreeCell.RIGHT_COMPLETED);
else topCell.setstatusCell(TreeCell.LEFT_COMPLETED);
userF.opList.set(0, topCell);
}
}
/*System.out.println("the formulas after init");
System.out.println(userF.FormulaToString());
System.out.println(goodF.FormulaToString());*/
boolean opChecked[] = new boolean[userF.nextEntry];
boolean opCheckedCorrect = false;
// compare the number of leaves: if not identical we know it is not good.
if (userF.nb_leaves != goodF.nb_leaves) {
// System.out.println("nbLeaves not equal");
return false;
}
// if the two formulas do not have the same number of top operators, we know it is not good.
else if (userF.opList.size() != goodF.opList.size()) {
// System.out.println("size of opList not equal");
return false;
} else {
// System.out.println("first tests passed");
for (int i = 0; i < goodF.opList.size(); i++) {
String correctvalue = goodF.opList.get(i).getcellValue();
// System.out.println("test of operator: "+ correctvalue);
if (correctvalue.length() == 1) {
opCheckedCorrect = false;
for (int j = 0; j < userF.opList.size(); j++) {
if ((!opCheckedCorrect) && (!opChecked[j])) {
String currentValue = userF.opList.get(j).getcellValue();
// System.out.println("test of user operator: "+ currentValue+ "" + j);
if (correctvalue.equals(currentValue)) {
// System.out.println("test of the cells:");
// System.out.println("user"+ userF.opList.get(j).turnToString());
// System.out.println("user"+ goodF.opList.get(i).turnToString());
if (userF.opList.get(j).cellCorrect(goodF.opList.get(i))) {
// System.out.println("this cell is correct");
opChecked[j] = true;
opCheckedCorrect = true;
}
}
}
}
if (!opCheckedCorrect) return false;
}
}
return true;
}
} catch (SyntaxErrorException ex) {
java.util.logging.Logger.getLogger(Formula.class.getName()).log(Level.SEVERE, null, ex);
}
return false;
}