private int executeOperator(
int operatorIndex,
final OperatorType operatorType,
int operandCount,
Map<Integer, DelegateTokenType> index2DelegateType) {
Token<?> token = null;
operandCount += index2DelegateType.size();
// check if literal expression can be executed
boolean canExecute = true;
// operand count
int count = 0;
// operand start index
int operandStartIndex = -1;
for (int j = operatorIndex - 1; j >= 0; j--) {
token = this.tokenList.get(j);
if (token == null) {
// we must compact token list and retry executing
return -1;
}
final TokenType tokenType = token.getType();
// Check if operand is a literal operand
if (!this.isLiteralOperand(token, tokenType, count + 1, index2DelegateType)) {
canExecute = false;
break;
}
count++;
if (count == operandCount) {
operandStartIndex = j;
break;
}
}
// if we can execute it on compile
if (canExecute) {
// arguments
AviatorObject[] args = new AviatorObject[operandCount];
int index = 0;
for (int j = operandStartIndex; j < operatorIndex; j++) {
token = this.tokenList.get(j);
if (token.getType() == TokenType.Delegate) {
this.tokenList.set(j, null);
continue;
}
args[index++] = this.getAviatorObjectFromToken(token);
// set argument token to null
this.tokenList.set(j, null);
}
// execute it now
AviatorObject result = operatorType.eval(args);
// set result as token to tokenList for next executing
this.tokenList.set(operatorIndex, this.getTokenFromOperand(result));
return 1;
}
return 0;
}
