/**
* Wird aufgerufen um aus dem bergebenen CFMLString einen Ausdruck auszulesen und diese zu
* interpretieren. <br>
* Beispiel eines bergebenen String:<br>
* <code>session.firstName</code> oder <code>trim(left('test'&var1,3))</code> <br>
* EBNF:<br>
* <code>spaces impOp;</code>
*
* @param pc
* @param cfml
* @return
* @throws PageException
*/
public Object interpret(PageContext pc, ParserString cfml) throws PageException {
this.cfml = cfml;
this.pc = pc;
if (pc != null) fld = ((ConfigImpl) pc.getConfig()).getCombinedFLDs();
if (JSON_ARRAY == null) JSON_ARRAY = fld.getFunction("_jsonArray");
if (JSON_STRUCT == null) JSON_STRUCT = fld.getFunction("_jsonStruct");
cfml.removeSpace();
Ref ref = assignOp();
cfml.removeSpace();
if (cfml.isAfterLast()) {
return ref.getValue();
}
throw new ExpressionException("Syntax Error, invalid Expression [" + cfml.toString() + "]");
}
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;
}
@Override
public Object getValue(PageContext pc) throws PageException {
return new Double(
Caster.toDoubleValue(left.getValue(pc)) % Caster.toDoubleValue(right.getValue(pc)));
}