Examples of railo.runtime.interpreter.CFMLExpressionInterpreter

railo.runtime.interpreter.CFMLExpressionInterpreter

Der CFMLExprTransfomer implementiert das Interface ExprTransfomer, er bildet die Parser Grammatik ab, die unten definiert ist. Er erh￤lt als Eingabe CFML Code, als String oder CFMLString, der einen CFML Expression erh￤lt und liefert ein CFXD Element zurck, das diesen Ausdruck abbildet. Mithilfe der FunctionLibﾒs, kann er Funktionsaufrufe, die Teil eines Ausdruck sein k￶nnen, erkennen und validieren. Dies geschieht innerhalb der Methode function. Falls ein Funktionsaufruf, einer Funktion innerhalb einer FunctionLib entspricht, werden diese gegeneinander verglichen und der Aufruf wird als Build-In-Funktion bernommen, andernfalls wird der Funktionsaufruf als User-Defined-Funktion interpretiert. Die Klasse Cast, Operator und ElementFactory (siehe 3.2) helfen ihm beim erstellen des Ausgabedokument CFXD.

 Parser Grammatik EBNF (Extended Backus-Naur Form)  transform      = spaces impOp; impOp          = eqvOp {"imp" spaces eqvOp}; eqvOp          = xorOp {"eqv" spaces xorOp}; xorOp          = orOp {"xor" spaces  orOp}; orOp           = andOp {("or" | "||") spaces andOp};  (* "||" Existiert in CFMX nicht *) andOp          = notOp {("and" | "&&") spaces notOp};  (* "&&" Existiert in CFMX nicht *)  notOp          = [("not"|"!") spaces] decsionOp;  (* "!" Existiert in CFMX nicht *) decsionOp      = 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 *) concatOp       = plusMinusOp {"&" spaces plusMinusOp}; plusMinusOp    = modOp {("-"|"+") spaces modOp}; modOp          = divMultiOp {("mod" | "%") spaces divMultiOp};  (* modulus operator , "%" Existiert in CFMX nicht *) divMultiOp     = expoOp {("*"|"/") spaces expoOp}; expoOp         = clip {("exp"|"^") spaces clip};  (*exponent operator, " exp " Existiert in CFMX nicht *) clip           = ("(" spaces impOp ")" spaces) | checker; checker        = string | number | dynamic | sharp; string         = ("'" {"##"|"''"|"#" impOp "#"| ?-"#"-"'" } "'") |  (""" {"##"|""""|"#" impOp "#"| ?-"#"-""" } """); number         = ["+"|"-"] digit {digit} {"." digit {digit}}; digit          = "0"|..|"9"; dynamic        = "true" | "false" | "yes" | "no" | startElement   {("." identifier | "[" structElement "]")[function] }; startElement   = identifier "(" functionArg ")" | scope | identifier; scope          = "variable" | "cgi" | "url" | "form" | "session" | "application" |  "arguments" | "cookie" | " client"; identifier     = (letter | "_") {letter | "_"|digit}; structElement  = "[" impOp "]"; functionArg    = [impOp{"," impOp}]; sharp          = "#" checker "#"; spaces         = {space}; space          = "\s"|"\t"|"\f"|"\t"|"\n"; letter         = "a"|..|"z"|"A"|..|"Z"; {"x"}= 0 bis n mal "x" ["x"]= 0 bis 1 mal "x" ("x" | "y")"z" = "xz" oder "yz"

    return new CollectionIterator(keys(),this);
  }


  public void readExternal(ObjectInput in) throws IOException {
    try {
      QueryImpl other=(QueryImpl) new CFMLExpressionInterpreter().interpret(ThreadLocalPageContext.get(),in.readUTF());
      this.arrCurrentRow=other.arrCurrentRow;
      this.columncount=other.columncount;
      this.columnNames=other.columnNames;
      this.columns=other.columns;
      this.exeTime=other.exeTime;

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    }
  }


  private void readExternalOldStyle(PageContext pc, String str) throws IOException {
    try {
      ComponentImpl other=(ComponentImpl) new CFMLExpressionInterpreter().interpret(pc,str);
      _readExternal(other);
    }
    catch (PageException e) {
      throw ExceptionUtil.toIOException(e);
    }

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    return manager;
  }


  @Override
  public Object evaluate(String expression) throws PageException {
    return new CFMLExpressionInterpreter().interpret(this,expression);
  }

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            int format = UDFUtil.toReturnFormat(strArgCollFormat,-1);
            
              // CFML
              if(UDF.RETURN_FORMAT_SERIALIZE==format)  {
                 // do not catch exception when format is defined
                args=new CFMLExpressionInterpreter().interpret(pc, str);
              }
              // JSON
              if(UDF.RETURN_FORMAT_JSON==format)  {
                 // do not catch exception when format is defined
                args=new JSONExpressionInterpreter(false).interpret(pc, str);
              }
              // default 
              else {
                 // catch exception when format is not defined, then in this case the string can also be a simple argument
                try {
                  args=new JSONExpressionInterpreter(false).interpret(pc, str);
                } 
                catch (PageException pe) {
                  try {
                    args=new CFMLExpressionInterpreter().interpret(pc, str);
                  } 
                  catch (PageException _pe) {}
            }
              }
        }

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      //PageContext pc = ThreadLocalPageContext.get();
      Property p;
      Object v;
      Collection.Key k;
    CFMLExpressionInterpreter interpreter = new CFMLExpressionInterpreter();
      for(int i=0;i<props.length;i++){
        p=props[i];
        k=Caster.toKey(p.getName());
      // value
        v=scope.get(k,null);
        if(v==null)v=comp.get(k, null);
      // default
        
        if(v!=null)v=Caster.castTo(pc, p.getType(), v, false);
        else{
          if(!StringUtil.isEmpty(p.getDefault())){
            try {
              v=Caster.castTo(pc, p.getType(), p.getDefault(), false);
              
            }
              catch(PageException pe) {
                try {
                  v=interpreter.interpret(pc, p.getDefault());
                  v=Caster.castTo(pc, p.getType(), v, false);
                }
                  catch(PageException pe2) {
                  throw new ExpressionException("can not use default value ["+p.getDefault()+"] for property ["+p.getName()+"] with type ["+p.getType()+"]");
                  }

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        }
        catch(PageException pe){}
      break;
      case UDF.RETURN_FORMAT_SERIALIZE:
        try{
          return new CFMLExpressionInterpreter().interpret(pc, toString(data,charset));
        }
        catch(PageException pe){}
      break;
      case UDF.RETURN_FORMAT_WDDX:
        try{

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  private static Object _call(PageContext pc , Object[] objs,int len, boolean preciseMath) throws PageException {
    Object rst=null;
    for(int i=0;i<len;i++) {
      if(objs[i] instanceof Number) rst= objs[i];
      else rst= new CFMLExpressionInterpreter().interpret(pc,Caster.toString(objs[i]), preciseMath);
    }
    return rst;
  }

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Related Classes of railo.runtime.interpreter.CFMLExpressionInterpreter

railo.commons.lang.ParserString

railo.runtime.ComponentImpl

railo.runtime.ComponentPage

railo.runtime.functions.dynamicEvaluation.Evaluate

railo.runtime.interpreter.ref.cast.Casting

railo.runtime.interpreter.ref.func.BIFCall

railo.runtime.interpreter.ref.func.UDFCall

railo.runtime.interpreter.ref.literal.LFunctionValue

railo.runtime.interpreter.ref.literal.LNumber

railo.runtime.interpreter.ref.literal.LString

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