public ExpressionPart parseTokens(Vector<Token> input) throws Exception { // TODO INNY PARSER
System.out.println("parsing tokens");
if (input.size() == 0) {
System.out.println("no tokens to parse!");
return null;
}
for (int k = 0; k < input.size(); k++) {
System.out.println(
"next token: " + input.get(k).getToken() + " type: " + input.get(k).getType());
}
if (input.size() == 1 && input.get(0).getType() == 0) {
System.out.println("only one number to parse");
return new Number(Double.parseDouble(input.get(0).getToken()));
}
if (input.size() == 1 && input.get(0).getType() == 3) {
System.out.println("only one variable to parse");
return new Variable(input.get(0).getToken());
}
ExpressionPart returnVal = null;
System.out.println(
"amount of tokens: "
+ input.size()); // I'm working on new parser, i don't like the way current one is
// functioning
/*
//int bracketLevel = 0;
int tmpBracketLevel = 0;
int i = input.size() - 1;
boolean bracketFlag = false;
if(input.get(0).getToken().equals("(") && input.get(i).getToken().equals(")")){
bracketFlag = true;
for(int j = 0; j < i; j++){
Token currToken = input.get(j);
if(currToken.getToken().equals("(")){
tmpBracketLevel ++;
}
if(currToken.getToken().equals(")")){
tmpBracketLevel --;
if(tmpBracketLevel == 0 && j < i-1){
bracketFlag = false;
break;
}
}
}
}
if(bracketFlag){
i = input.size() - 2;
}
String currentOp = input.get(0).getToken();
int k;
if(bracketFlag){
k = 2;
}else{
k = 1;
}
Vector<Token> rightSideOfLast = new Vector<Token>();
for(; k < i; k++){
Token currToken = input.get(k);
if(getPriority(currentOp) >= getPriority(currToken.getToken())){
System.out.println("token with higer priority!");
if(returnVal instanceof Addition){
Addition tmp = (Addition)returnVal;
tmp.addAddend(parseTokens(rightSideOfLast));
returnVal = tmp;
}else if(returnVal instanceof Substraction){
Substraction tmp = (Substraction)returnVal;
tmp.setSubtrahend(parseTokens(rightSideOfLast));
returnVal = tmp;
}else{
returnVal = parseTokens(rightSideOfLast);
}
currentOp = currToken.getToken();
if(currentOp.equals("+")){
System.out.println("addition");
if(returnVal == null){
Addition tmp = new Addition();
tmp.addAddend(returnVal);
returnVal = tmp;
System.out.println("returnVal == null");
System.out.println(returnVal);
}else if(returnVal instanceof Addition){
Addition tmp = (Addition)returnVal;
tmp.addAddend(returnVal);
returnVal = tmp;
}
}
if(currentOp.equals("-")){
Substraction tmp = new Substraction();
tmp.setMinuend(returnVal);
returnVal = tmp;
}
if(currentOp.equals("*")){
}
if(currentOp.equals("/")){
}
if(currentOp.equals("=")){
}
rightSideOfLast.clear();
}else{
rightSideOfLast.add(currToken);
}
}
System.out.println("end of parsing!");
return returnVal;*/
String currentOp = "";
int lastOperatorPos = 0;
for (int k = 0;
k <= 5;
k++) { // look only at operators at lowest priority, then ones higher priority
Vector<Token> tokensToAdd = new Vector<Token>();
System.out.println("searching for operators with priority: " + k);
if (!currentOp.equals("")) {
break;
}
int bracketLevel = 0;
int tmpBracketLevel = 0;
int i = input.size() - 1;
boolean bracketFlag = false; // TODO system struktur, ewentualnie bez tokenow
if (input.get(0).getToken().equals("(") && input.get(i).getToken().equals(")")) {
bracketFlag = true;
for (int j = 0; j < i; j++) {
Token currToken = input.get(j);
if (currToken
.getToken()
.equals("(")) { // if thera are brackets surronding expression, ignore them
tmpBracketLevel++;
}
if (currToken.getToken().equals(")")) {
tmpBracketLevel--;
if (tmpBracketLevel == 0 && j < i - 1) {
bracketFlag = false;
break;
}
}
}
}
if (bracketFlag) {
i = input.size() - 2;
}
for (; i >= 0; i--) { // TODO daje odwrotna kolejnosc niz wpisane(nie mozna )
Token currToken = input.get(i);
tokensToAdd.add(currToken); // tokens that are between last operator and next one(useful in
// addition/multiplications)
if (currToken.getToken().equals(")")) {
bracketLevel++;
}
if (currToken.getToken().equals("(")) {
bracketLevel--;
}
if (bracketLevel > 0) {
System.out.println("skipping token, searching for end of bracket");
continue;
}
System.out.println("next token: " + currToken.getToken() + " type: " + currToken.getType());
if (currToken.getType() == 1) {
if (getPriority(currToken.getToken()) == k) {
lastOperatorPos = i;
if (currentOp.equals("")) { // to jest, zeby nie ustawial nowego operatora
currentOp =
currToken
.getToken(); // TODO obsluga pierwiastkowania(a tym samym operacje z innym
// zapisem niz arg op arg)
}
if (currentOp.equals(currToken.getToken())) {
Vector<Token> firstPart = new Vector<Token>();
Vector<Token> secondPart = new Vector<Token>();
if (!bracketFlag) {
firstPart.addAll(input.subList(0, i));
secondPart.addAll(input.subList(i + 1, input.size()));
} else {
firstPart.addAll(input.subList(1, i));
secondPart.addAll(input.subList(i + 1, input.size() - 1));
}
if (returnVal == null) { // parse diffrent operators
System.out.println("first operator");
if (currentOp.equals("\\")) {
Fraction returnValTmp = new Fraction();
System.out.println("[\\]part 1");
returnValTmp.setNumerator(parseTokens(firstPart));
System.out.println("[\\]part 2");
returnValTmp.setDenominator(parseTokens(secondPart));
returnVal = returnValTmp;
}
if (currentOp.equals("+")) {
Addition returnValTmp = new Addition();
System.out.println("[+]part 1");
returnValTmp.addAddend(parseTokens(secondPart));
// System.out.println("[+]part 2");
// returnValTmp.addAddend(parseTokens(secondPart));
returnVal = returnValTmp;
System.out.println("end of part 2");
tokensToAdd.clear();
}
if (currentOp.equals("-")) {
Substraction returnValTmp = new Substraction();
System.out.println("[-]part 1");
returnValTmp.setMinuend(parseTokens(firstPart));
System.out.println("[-]part 2");
returnValTmp.setSubtrahend(parseTokens(secondPart));
returnVal = returnValTmp;
}
if (currentOp.equals("*")) {
Multiplication returnValTmp = new Multiplication();
System.out.println("[*]part 1");
returnValTmp.addFactor(parseTokens(secondPart));
// System.out.println("[+]part 2");
// returnValTmp.addAddend(parseTokens(secondPart));
returnVal = returnValTmp;
System.out.println("end of part 2");
tokensToAdd.clear();
}
if (currentOp.equals("/")) {
Division returnValTmp = new Division();
System.out.println("[/]part 1");
returnValTmp.setDividend(parseTokens(firstPart));
System.out.println("[/]part 2");
returnValTmp.setDivisor(parseTokens(secondPart));
returnVal = returnValTmp;
}
if (currentOp.equals("^")) {
Exponentiation returnValTmp = new Exponentiation();
System.out.println("[^]part 1");
returnValTmp.setBase(parseTokens(firstPart));
System.out.println("[^]part 2");
returnValTmp.setExponent(parseTokens(secondPart));
returnVal = returnValTmp;
}
if (currentOp.equals("=")) {
Equation returnValTmp = new Equation();
System.out.println("[=]part 1");
returnValTmp.setSide1(parseTokens(firstPart));
System.out.println("[=]part 2");
returnValTmp.setSide2(parseTokens(secondPart));
returnVal = returnValTmp;
}
} else {
System.out.println("next operator");
if (currentOp.equals("+") && returnVal instanceof Addition) {
Addition returnValConverted = (Addition) returnVal;
// System.out.println("[+]part 1");
// returnValConverted.addAddend(parseTokens(firstPart));
Vector<Token> tokensInArg = new Vector<Token>();
tokensInArg.addAll(tokensToAdd.subList(0, tokensToAdd.size() - 1));
System.out.println("[+]part 2(adding only second part)");
returnValConverted.addAddend(parseTokens(tokensInArg));
tokensToAdd.clear();
}
if (currentOp.equals("*") && returnVal instanceof Multiplication) {
Multiplication returnValConverted = (Multiplication) returnVal;
// System.out.println("[+]part 1");
// returnValConverted.addAddend(parseTokens(firstPart));
Vector<Token> tokensInArg = new Vector<Token>();
tokensInArg.addAll(tokensToAdd.subList(0, tokensToAdd.size() - 1));
System.out.println("[+]part 2(adding only second part)");
returnValConverted.addFactor(parseTokens(tokensInArg));
tokensToAdd.clear();
}
}
}
}
}
if (bracketFlag && i <= 1) {
break;
}
}
Vector<Token> firstPart = new Vector<Token>();
Vector<Token> secondPart = new Vector<Token>();
if (!bracketFlag) {
firstPart.addAll(input.subList(0, lastOperatorPos));
secondPart.addAll(input.subList(lastOperatorPos + 1, input.size()));
} else if (lastOperatorPos >= 1) {
firstPart.addAll(input.subList(1, lastOperatorPos));
secondPart.addAll(input.subList(lastOperatorPos + 1, input.size() - 1));
}
System.out.println("Adding last part");
if (currentOp.equals("+") && returnVal instanceof Addition) {
Addition returnValConverted = (Addition) returnVal;
System.out.println("[+]part 1(adding only first part)");
returnValConverted.addAddend(parseTokens(firstPart));
tokensToAdd.clear();
}
if (currentOp.equals("*") && returnVal instanceof Multiplication) {
Multiplication returnValConverted = (Multiplication) returnVal;
System.out.println("[*]part 1(adding only first part)");
returnValConverted.addFactor(parseTokens(firstPart));
tokensToAdd.clear();
}
if (returnVal != null) {
break;
}
}
return returnVal;
}
