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/**
* 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.
*/
options
{
// Use \ u escapes in streams AND use a reader for the query
// => get both raw and escaped unicode
JAVA_UNICODE_ESCAPE = true ;
UNICODE_INPUT = false ;
STATIC = false ;
// DEBUG_PARSER = true ;
// DEBUG_TOKEN_MANAGER = true ;
}
PARSER_BEGIN(SSE_ParserCore)
/**
* 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 org.apache.jena.sparql.sse.lang.parser ;
import org.apache.jena.sparql.sse.lang.ParserSSEBase ;
public class SSE_ParserCore extends ParserSSEBase
{
}
PARSER_END(SSE_ParserCore)
// Now has explicit WS control in the grammar.
// Policy - eat trailing WS
// ---- Entry points : check for EOF.
void parse() : { }
{
{ parseStart() ; }
(<WS>)*
TermOrList()
<EOF>
{ parseFinish() ; }
}
void term() : { }
{
{ parseStart() ; }
Term()
<EOF>
{ parseFinish() ; }
}
// ----
void TermOrList() : { }
{
( Term() (<WS>)* | List() )
}
void List() : { Token t ; }
{
// The OP token must exclude these
( t = <LPAREN>
(<WS>)*
{ listStart(t.beginLine, t.beginColumn) ; }
BareList()
t = <RPAREN>
(<WS>)*
{ listFinish(t.beginLine, t.beginColumn) ; }
| t = <LBRACKET>
(<WS>)*
{ listStart(t.beginLine, t.beginColumn) ; }
BareList()
t = <RBRACKET>
(<WS>)*
{ listFinish(t.beginLine, t.beginColumn) ; } )
}
void BareList() : { }
{
(
TermOrList()
// White space swallowed
)*
}
void Term() : { Token t ; }
{
Symbol()
|
IRIref()
|
PrefixedName()
|
Var()
|
Literal()
|
BlankNode()
}
void Symbol() : { Token t ; }
{
t = <SYMBOL>
{ emitSymbol(t.beginLine, t.beginColumn, t.image) ; }
}
void IRIref() : { Token t ; String s ; }
{
t = <IRIref>
{
s = t.image ;
s = stripQuotes(s) ;
s = unescapeStr(s, t.beginLine, t.beginColumn) ;
emitIRI(t.beginLine, t.beginColumn, s) ; }
}
void PrefixedName() : { Token t ; }
{
t = <PNAME>
{ emitPName(t.beginLine, t.beginColumn, t.image) ; }
}
void Var() : { Token t ; }
{
// VAR_NAMED: "?" and any legal SPARQL variable.
// VAR_NAMED2: "?." and non-legal SPARQL variable (usually allocated)
// VAR_ANON: "??" : Anon variables.
// Includes "?" as a variable which allocated one from ?0, ?1, ?2
// Legal SPARQL syntax.
// Includes "??" as a variable for anon non-distinguished variables.
// Includes non-distinguished variables as ??0
// Includes internal allocated variables as ?.0
// ( t = <VAR_NAMED> | t = <VAR_NAMED2> | t = <VAR_ANON> )
( t = <VAR_NAMED> | t = <VAR_OTHER> )
{ emitVar(t.beginLine, t.beginColumn, stripChars(t.image, 1)) ; }
}
void Literal() : { }
{
( RDFLiteral()
| NumericLiteral()
// | BooleanLiteral() // Do as a symbol.
)
}
void BlankNode() : { Token t ; }
{
t = <BLANK_NODE_LABEL>
{ emitBNode(t.beginLine, t.beginColumn, stripChars(t.image, 2)) ; }
//|
// t = <LBRACKET> <RBRACKET> { return emitBNode(t.beginLine, t.beginColumn) ; }
// t = <ANON> { return emitBNode(t.beginLine, t.beginColumn) ; }
}
void RDFLiteral() : { Token t = null ; int currLine ; int currColumn ;
String lex ; String lang = null ;
String dt_iri = null ; String dt_pn = null ; }
{
( t = <STRING_LITERAL1> { lex = stripQuotes(t.image) ; }
| t = <STRING_LITERAL2> { lex = stripQuotes(t.image) ; }
| t = <STRING_LITERAL_LONG1> { lex = stripQuotes3(t.image) ; }
| t = <STRING_LITERAL_LONG2> { lex = stripQuotes3(t.image) ; }
)
{ currLine = t.beginLine ; currColumn = t.beginColumn ;
lex = unescapeStr(lex, currLine, currColumn) ;
}
// Optional lang tag and datatype.
(
t = <LANGTAG> { lang = stripChars(t.image, 1) ; }
|
<DATATYPE>
( t = <IRIref> { dt_iri = stripQuotes(t.image) ; }
| t = <PNAME> { dt_pn = t.image ; }
)
)?
{ emitLiteral(currLine, currColumn, lex, lang, dt_iri, dt_pn) ; }
}
void NumericLiteral() : { Token t ; }
{
t = <INTEGER>
{ emitLiteralInteger(t.beginLine, t.beginColumn, t.image) ; }
| t = <DECIMAL>
{ emitLiteralDecimal(t.beginLine, t.beginColumn, t.image) ; }
| t = <DOUBLE>
{ emitLiteralDouble(t.beginLine, t.beginColumn, t.image) ; }
}
// Symbol!
// Node BooleanLiteral() : {}
// {
// <TRUE> { return XSD_TRUE ; }
// |
// <FALSE> { return XSD_FALSE ; }
// }
// No whitespace skipping.
#undef SKIP
#include "tokens.inc"
/*
# Local Variables:
# tab-width: 4
# indent-tabs-mode: nil
# comment-default-style: "//"
# End:
*/
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