/**
* Liest einen Identifier aus und gibt diesen als String zurck. <br>
* EBNF:<br>
* <code>(letter | "_") {letter | "_"|digit};</code>
*
* @param firstCanBeNumber
* @return Identifier.
*/
private String identifier(boolean firstCanBeNumber) {
// int start = cfml.getPos();
if (!cfml.isCurrentLetter() && !cfml.isCurrentSpecial()) {
if (!firstCanBeNumber) return null;
else if (!cfml.isCurrentDigit()) return null;
}
StringBuffer sb = new StringBuffer();
// if(CASE_TYPE_UPPER==caseType)
sb.append(cfml.getCurrentUpper());
/*else if(CASE_TYPE_ORIGINAL==caseType)
sb.append(cfml.getCurrent());
else
sb.append(cfml.getCurrentLower());*/
do {
cfml.next();
if (!(cfml.isCurrentLetter() || cfml.isCurrentDigit() || cfml.isCurrentSpecial())) {
break;
}
// if(CASE_TYPE_UPPER==caseType)
sb.append(cfml.getCurrentUpper());
/*else if(CASE_TYPE_ORIGINAL==caseType)
sb.append(cfml.getCurrent());
else
sb.append(cfml.getCurrentLower());*/
} while (cfml.isValidIndex());
return sb.toString(); // cfml.substringLower(start,cfml.getPos()-start);
}
/**
* Transfomiert eine And (and) Operation. Im Gegensatz zu CFMX , werden "&&" Zeichen auch als And
* Operatoren anerkannt. <br>
* EBNF:<br>
* <code>notOp {("and" | "&&") spaces notOp}; (* "&&" Existiert in CFMX nicht *)</code>
*
* @return CFXD Element
* @throws PageException
*/
private Ref andOp() throws PageException {
Ref ref = notOp();
while (cfml.isValidIndex() && (cfml.forwardIfCurrent("&&") || cfml.forwardIfCurrent("and"))) {
cfml.removeSpace();
ref = new And(ref, notOp());
}
return ref;
}
/**
* Transfomiert eine Or (or) Operation. Im Gegensatz zu CFMX , werden "||" Zeichen auch als Or
* Operatoren anerkannt. <br>
* EBNF:<br>
* <code>andOp {("or" | "||") spaces andOp}; (* "||" Existiert in CFMX nicht *)</code>
*
* @return CFXD Element
* @throws PageException
*/
private Ref orOp() throws PageException {
Ref ref = andOp();
while (cfml.isValidIndex() && (cfml.forwardIfCurrent("||") || cfml.forwardIfCurrent("or"))) {
cfml.removeSpace();
ref = new Or(ref, andOp());
}
return ref;
}
/**
* Liest die reinen Zahlen innerhalb des CFMLString aus und gibt diese als Zeichenkette zurck.
* <br>
* EBNF:<br>
* <code>"0"|..|"9";</code>
*
* @param rtn
*/
private void digit(StringBuffer rtn) {
while (cfml.isValidIndex()) {
if (!cfml.isCurrentDigit()) break;
rtn.append(cfml.getCurrentLower());
cfml.next();
}
}
/**
* Transfomiert den Exponent Operator (^,exp). Im Gegensatz zu CFMX , werden die Zeichen " exp "
* auch als Exponent anerkannt. <br>
* EBNF:<br>
* <code>clip {("exp"|"^") spaces clip};</code>
*
* @return CFXD Element
* @throws PageException
*/
private Ref expoOp() throws PageException {
Ref ref = unaryOp();
while (cfml.isValidIndex() && (cfml.forwardIfCurrent('^') || cfml.forwardIfCurrent("exp"))) {
cfml.removeSpace();
ref = new Exp(ref, unaryOp());
}
return ref;
}
/**
* Transfomiert eine Modulus Operation. Im Gegensatz zu CFMX , wird das "%" Zeichen auch als
* Modulus Operator anerkannt. <br>
* EBNF:<br>
* <code>
* divMultiOp {("mod" | "%") spaces divMultiOp}; (* modulus operator , "%" Existiert in CFMX nicht *)
* </code>
*
* @return CFXD Element
* @throws PageException
*/
private Ref modOp() throws PageException {
Ref ref = divMultiOp();
while (cfml.isValidIndex() && (cfml.forwardIfCurrent('%') || cfml.forwardIfCurrent("mod"))) {
ref = _mod(ref);
// cfml.removeSpace();
// ref=new Mod(ref,divMultiOp());
}
return ref;
}
/**
* Transfomiert eine Not (not) Operation. Im Gegensatz zu CFMX , wird das "!" Zeichen auch als Not
* Operator anerkannt. <br>
* EBNF:<br>
* <code>[("not"|"!") spaces] decsionOp; (* "!" Existiert in CFMX nicht *)</code>
*
* @return CFXD Element
* @throws PageException
*/
private Ref notOp() throws PageException {
if (cfml.isValidIndex()) {
if (cfml.isCurrent('!') && !cfml.isCurrent("!=")) {
cfml.next();
cfml.removeSpace();
return new Not(decsionOp());
} else if (cfml.forwardIfCurrentAndNoWordAfter("not")) {
cfml.removeSpace();
return new Not(decsionOp());
}
}
return decsionOp();
}
private Ref newOp() throws PageException {
int start = cfml.getPos();
String name = null;
cfml.removeSpace();
// first identifier
name = identifier(true);
Ref refName = null;
if (name != null) {
StringBuilder fullName = new StringBuilder();
fullName.append(name);
// Loop over addional identifier
while (cfml.isValidIndex()) {
if (cfml.forwardIfCurrent('.')) {
cfml.removeSpace();
name = identifier(true);
if (name == null) throw new ExpressionException("invalid Component declaration");
cfml.removeSpace();
fullName.append('.');
fullName.append(name);
} else break;
}
refName = new LString(fullName.toString());
} else {
if (cfml.isCurrentQuoter()) refName = string();
if (refName == null) {
cfml.setPos(start);
return null;
}
}
cfml.removeSpace();
if (cfml.isCurrent('(')) {
FunctionLibFunction function = fld.getFunction("_createComponent");
Ref[] arguments = functionArg("_createComponent", true, function, ')');
Ref[] args = new Ref[arguments.length + 1];
for (int i = 0; i < arguments.length; i++) {
args[i] = arguments[i];
}
args[args.length - 1] = refName;
BIFCall bif = new BIFCall(pc, function, args);
cfml.removeSpace();
return bif;
}
throw new ExpressionException("invalid Component declaration ");
}
private Ref subDynamic(Ref ref) throws PageException {
String name = null;
// Loop over nested Variables
while (cfml.isValidIndex()) {
// .
if (cfml.forwardIfCurrent('.')) {
// Extract next Var String
cfml.removeSpace();
name = identifier(true);
if (name == null) throw new ExpressionException("Invalid identifier");
cfml.removeSpace();
ref = new Variable(pc, ref, name);
}
// []
else if (cfml.forwardIfCurrent('[')) {
cfml.removeSpace();
ref = new Variable(pc, ref, assignOp());
cfml.removeSpace();
if (!cfml.forwardIfCurrent(']'))
throw new ExpressionException("Invalid Syntax Closing []] not found");
}
// finish
else {
break;
}
cfml.removeSpace();
if (cfml.isCurrent('(')) {
if (!(ref instanceof Set))
throw new ExpressionException(
"invalid syntax " + ref.getTypeName() + " can't called as function");
Set set = (Set) ref;
ref = new UDFCall(pc, set.getParent(), set.getKey(), functionArg(name, false, null, ')'));
}
}
if (ref instanceof railo.runtime.interpreter.ref.var.Scope) {
railo.runtime.interpreter.ref.var.Scope s = (railo.runtime.interpreter.ref.var.Scope) ref;
if (s.getScope() == Scope.SCOPE_ARGUMENTS
|| s.getScope() == Scope.SCOPE_LOCAL
|| s.getScope() == ScopeSupport.SCOPE_VAR) {
ref = new Bind(s);
}
}
return ref;
}
/**
* <font f>Transfomiert eine Vergleichs Operation. <br>
* EBNF:<br>
* <code>concatOp {("neq"|"eq"|"gte"|"gt"|"lte"|"lt"|"ct"|
* "contains"|"nct"|"does not contain") spaces concatOp};
* (* "ct"=conatains und "nct"=does not contain; Existiert in CFMX nicht *)</code>
*
* @return CFXD Element
* @throws PageException
*/
private Ref decsionOp() throws PageException {
Ref ref = concatOp();
boolean hasChanged = false;
// ct, contains
if (cfml.isValidIndex()) {
do {
hasChanged = false;
if (cfml.isCurrent('c')) {
if (cfml.forwardIfCurrent("ct")) {
cfml.removeSpace();
ref = new CT(ref, concatOp());
hasChanged = true;
} else if (cfml.forwardIfCurrent("contains")) {
cfml.removeSpace();
ref = new CT(ref, concatOp());
hasChanged = true;
}
}
// does not contain
else if (cfml.forwardIfCurrent("does", "not", "contain")) {
cfml.removeSpace();
ref = new NCT(ref, concatOp());
hasChanged = true;
}
// equal, eq
else if (cfml.isCurrent("eq") && !cfml.isCurrent("eqv")) {
cfml.setPos(cfml.getPos() + 2);
cfml.forwardIfCurrent("ual");
cfml.removeSpace();
ref = new EQ(ref, concatOp());
hasChanged = true;
}
// ==
else if (cfml.forwardIfCurrent("==")) {
if (cfml.forwardIfCurrent('=')) {
cfml.removeSpace();
ref = new EEQ(ref, concatOp());
} else {
cfml.removeSpace();
ref = new EQ(ref, concatOp());
}
hasChanged = true;
}
// !=
else if (cfml.forwardIfCurrent("!=")) {
if (cfml.forwardIfCurrent('=')) {
cfml.removeSpace();
ref = new NEEQ(ref, concatOp());
} else {
cfml.removeSpace();
ref = new NEQ(ref, concatOp());
}
hasChanged = true;
}
// <=/</<>
else if (cfml.forwardIfCurrent('<')) {
if (cfml.forwardIfCurrent('=')) {
cfml.removeSpace();
ref = new LTE(ref, concatOp());
} else if (cfml.forwardIfCurrent('>')) {
cfml.removeSpace();
ref = new NEQ(ref, concatOp());
} else {
cfml.removeSpace();
ref = new LT(ref, concatOp());
}
hasChanged = true;
}
// >/>=
else if (cfml.forwardIfCurrent('>')) {
if (cfml.forwardIfCurrent('=')) {
cfml.removeSpace();
ref = new GTE(ref, concatOp());
} else {
cfml.removeSpace();
ref = new GT(ref, concatOp());
}
hasChanged = true;
}
// gt, gte, greater than or equal to, greater than
else if (cfml.isCurrent('g')) {
if (cfml.forwardIfCurrent("gt")) {
if (cfml.forwardIfCurrent('e')) {
cfml.removeSpace();
ref = new GTE(ref, concatOp());
} else {
cfml.removeSpace();
ref = new GT(ref, concatOp());
}
hasChanged = true;
} else if (cfml.forwardIfCurrent("greater", "than")) {
if (cfml.forwardIfCurrent("or", "equal", "to", true)) {
cfml.removeSpace();
ref = new GTE(ref, concatOp());
} else {
cfml.removeSpace();
ref = new GT(ref, concatOp());
}
hasChanged = true;
} else if (cfml.forwardIfCurrent("ge")) {
cfml.removeSpace();
ref = new GTE(ref, concatOp());
hasChanged = true;
}
}
// is, is not
else if (cfml.forwardIfCurrent("is")) {
if (cfml.forwardIfCurrent("not", true)) {
cfml.removeSpace();
ref = new NEQ(ref, concatOp());
} else {
cfml.removeSpace();
ref = new EQ(ref, concatOp());
}
hasChanged = true;
}
// lt, lte, less than, less than or equal to
else if (cfml.isCurrent('l')) {
if (cfml.forwardIfCurrent("lt")) {
if (cfml.forwardIfCurrent('e')) {
cfml.removeSpace();
ref = new LTE(ref, concatOp());
} else {
cfml.removeSpace();
ref = new LT(ref, concatOp());
}
hasChanged = true;
} else if (cfml.forwardIfCurrent("less", "than")) {
if (cfml.forwardIfCurrent("or", "equal", "to", true)) {
cfml.removeSpace();
ref = new LTE(ref, concatOp());
} else {
cfml.removeSpace();
ref = new LT(ref, concatOp());
}
hasChanged = true;
} else if (cfml.forwardIfCurrent("le")) {
cfml.removeSpace();
ref = new LTE(ref, concatOp());
hasChanged = true;
}
}
// neq, not equal, nct
else if (cfml.isCurrent('n')) {
// Not Equal
if (cfml.forwardIfCurrent("neq")) {
cfml.removeSpace();
ref = new NEQ(ref, concatOp());
hasChanged = true;
}
// Not Equal (Alias)
else if (cfml.forwardIfCurrent("not", "equal")) {
cfml.removeSpace();
ref = new NEQ(ref, concatOp());
hasChanged = true;
}
// nct
else if (cfml.forwardIfCurrent("nct")) {
cfml.removeSpace();
ref = new NCT(ref, concatOp());
hasChanged = true;
}
}
} while (hasChanged);
}
return ref;
}
