jena-arq/Grammar/JSON/json.jj

#if 0
// (Run through cpp -P -C first)
#endif

#define PACKAGE     org.apache.jena.atlas.json.io.parserjavacc.javacc
#define CLASS       JSON_Parser
#define PARSERBASE  JSON_ParserBase

options
{
   JAVA_UNICODE_ESCAPE   = true ;
   UNICODE_INPUT         = false ;

  STATIC                = false ;
//  DEBUG_PARSER          = true ;
//  DEBUG_TOKEN_MANAGER   = true ;
}


PARSER_BEGIN(CLASS)
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package PACKAGE ;

public class CLASS extends PARSERBASE
{
}
PARSER_END(CLASS)


SKIP : { <" " | "\t" | "\n" | "\r" | "\f"> }
TOKEN: { <WS: " " | "\t" | "\n" | "\r" | "\f"> }

// Do \ u inside JavaCC??

//TOKEN [IGNORE_CASE] :
TOKEN :
{
  <ECHAR: "\\" ( "t"|"b"|"n"|"r"|"f"|"\\"|"\""|"'") >
| < #QUOTE_3D: "\"\"\"">
| < #QUOTE_3S: "'''">
| < STRING_LITERAL1: 
      // Single quoted string
      "'" ( (~["'","\\","\n","\r"]) | <ECHAR> )* "'" > 
| < STRING_LITERAL2:
    // Double quoted string
      "\"" ( (~["\"","\\","\n","\r"]) | <ECHAR> )* "\"" >
| < STRING_LITERAL_LONG1:
     <QUOTE_3S> 
      ( ("'" | "''")? (~["'","\\"] | <ECHAR> ))*
     <QUOTE_3S> >

| < STRING_LITERAL_LONG2: 
     <QUOTE_3D> 
      ( ("\"" | "\"\"")? (~["\"","\\"] | <ECHAR> ))*
     <QUOTE_3D> >




| < #DIGITS: (["0"-"9"])+>
| < INTEGER: <DIGITS> >
| < DECIMAL: ( <DIGITS> "." (<DIGITS>)* | "." <DIGITS> ) >
| < DOUBLE:   // Required exponent.
      (
        (["0"-"9"])+ "." (["0"-"9"])* <EXPONENT>
        | "." (["0"-"9"])+ (<EXPONENT>)
        | (["0"-"9"])+ <EXPONENT>
      )
      >

| < POSITIVE_INTEGER: <PLUS> <INTEGER> >
| < POSITIVE_DECIMAL: <PLUS> <DECIMAL> >
| < POSITIVE_DOUBLE:  <PLUS> <DOUBLE> >

| < NEGATIVE_INTEGER: <MINUS> <INTEGER> >
| < NEGATIVE_DECIMAL: <MINUS> <DECIMAL> >
| < NEGATIVE_DOUBLE:  <MINUS> <DOUBLE> >

| < #EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"])+ >


|  <TRUE: "true">
|  <FALSE: "false">
|  <NULL: "null">

| < LBRACE:    "{" >
| < RBRACE:    "}" >

| < LBRACKET:  "[" >
| < RBRACKET:  "]" >

| < LPAREN:    "(" >
| < RPAREN:    ")" >

| <COMMA: 	"," >
| <COLON: 	":" >

| <PLUS:	"+" >
| <MINUS:	"-" >
}

// ---- Parser entry points

void unit() : { Token t ; }
{
    { startParse(-1, -1) ; }
    Object()
    t = <EOF>
    { finishParse(t.beginLine, t.beginColumn) ; }
}
 

void any() : { Token t ; }
{
    { startParse(-1, -1) ; }
    (Value())?
    t = <EOF>
    { finishParse(t.beginLine, t.beginColumn) ; }
}


// ---- Structures

void Value() : {}
{
  SimpleValue()
| Object()
| Array()
}

void Object() : { Token t ; }
{
  t = <LBRACE> 
  { startObject(t.beginLine, t.beginColumn) ; }
  (Members(t))?
  t = <RBRACE>
  { finishObject(t.beginLine, t.beginColumn); }
}

void Members(Token t) : { }
{
  Pair(t) 
  (t = <COMMA> Pair(t))* 
}

void Pair(Token t) : { }
{
  { startPair(t.beginLine, t.beginColumn) ; }
  String()
  t = <COLON>
  { keyPair(t.beginLine, t.beginColumn) ; }
  Value()
  { finishPair(t.beginLine, t.beginColumn) ; }
}

void Array() : { Token t ; }
{
   t = <LBRACKET> 
   { startArray(t.beginLine, t.beginColumn) ; }
   (Elements(t))?
   t = <RBRACKET>
   { finishArray(t.beginLine, t.beginColumn) ; }
}

void Elements(Token t) : { }
{
    ArrayValue(t.beginLine, t.beginColumn)
    (t = <COMMA> ArrayValue(t.beginLine, t.beginColumn))*
}

void ArrayValue(long line, long col) : { }
{
    Value() { element(line, col) ; }
}

// ---- 

void SimpleValue() : {}
{
  String()
| Number()
| True()
| False()
| Null()
}

void Number() : { Token t ; }
{
  t = <INTEGER> 		    { valueInteger(t.image, t.beginLine, t.beginColumn) ; }
| t = <DECIMAL>			    { valueDecimal(t.image, t.beginLine, t.beginColumn) ; }
| t = <DOUBLE>			    { valueDouble(t.image, t.beginLine, t.beginColumn) ; }
| t = <POSITIVE_INTEGER>	{ valueInteger(t.image, t.beginLine, t.beginColumn) ; }
| t = <POSITIVE_DECIMAL>	{ valueDecimal(t.image, t.beginLine, t.beginColumn) ; }
| t = <POSITIVE_DOUBLE>		{ valueDouble(t.image, t.beginLine, t.beginColumn) ; }
| t = <NEGATIVE_INTEGER>	{ valueInteger(t.image, t.beginLine, t.beginColumn) ; }
| t = <NEGATIVE_DECIMAL>	{ valueDecimal(t.image, t.beginLine, t.beginColumn) ; }
| t = <NEGATIVE_DOUBLE>		{ valueDouble(t.image, t.beginLine, t.beginColumn) ; }
}

// Token to Java Object : These  rules exist to inject the 
// necessary Java objects and code for the tokens.
void String() : { Token t ; }
{
  t = <STRING_LITERAL2> { valueString(t.image, t.beginLine, t.beginColumn); } 
	//  <STRING>
}

void True() : { Token t ; }
{
  t = <TRUE> { valueBoolean(true, t.beginLine, t.beginColumn) ; }
}

void False() : { Token t ; }
{
  t = <FALSE> { valueBoolean(false, t.beginLine, t.beginColumn) ; }
}

void Null() : { Token t ; }
{
  t = <NULL> { valueNull(t.beginLine, t.beginColumn) ; }
}

/*
# Local Variables:
# tab-width: 4
# indent-tabs-mode: nil
# comment-default-style: "//"
# End:
*/