Package org.apache.jena.riot.tokens

Examples of org.apache.jena.riot.tokens.Token

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    static protected final Node nodeSameAs     = OWL.sameAs.asNode() ;
    static protected final Node nodeLogImplies = NodeFactory.createURI("http://www.w3.org/2000/10/swap/log#implies") ;

    /** Get predicate - maybe null for "illegal" */
    protected final Node predicate() {
        Token t = peekToken() ;

        if ( t.hasType(TokenType.KEYWORD) ) {
            boolean strict = profile.isStrictMode() ;
            Token tErr = peekToken() ;
            String image = peekToken().getImage() ;
            if ( image.equals(KW_A) )
                return NodeConst.nodeRDFType ;
            if ( !strict && image.equals(KW_SAME_AS) )
                return nodeSameAs ;
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            return n ;
        }

        // Special words.
        if ( lookingAt(TokenType.KEYWORD) ) {
            Token tErr = peekToken() ;
            // Location independent node words
            String image = peekToken().getImage() ;
            nextToken() ;
            if ( image.equals(KW_TRUE) )
                return NodeConst.nodeTrue ;
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        exception(peekToken(), "Unrecognized: " + peekToken()) ;
        return null ;
    }

    protected final Node triplesBlankNode() {
        Token t = nextToken() ; // Skip [
        Node subject = profile.createBlankNode(currentGraph, t.getLine(), t.getColumn()) ;
        triplesBlankNode(subject) ;
        return subject ;
    }
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    @Override
    public final Token next()
    {
        if ( ! hasNext() )
            throw new NoSuchElementException() ;
        Token t = token ;
        token = null ;
        return t ;
    }
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    // Keys (restricted strings, used as keys in maps)
    //  ALPHA (ALPHA,NUMERIC,_,...)
   
    private Token parseToken()
        {
            token = new Token(getLine(), getColumn()) ;
           
            int ch = reader.peekChar() ;
   
            // ---- String
            // Support both "" and '' strings (only "" is legal JSON)
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        Node listHead = null ;

        startList() ;

        for (;;) {
            Token errorToken = peekToken() ;
            if ( eof() )
                exception(peekToken(), "Unterminated list") ;

            if ( lookingAt(RPAREN) ) {
                nextToken() ;
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        if ( tokenEOF != null )
            return true ;
       
        if ( ! moreTokens() )
        {
            tokenEOF = new Token(tokens.getLine(), tokens.getColumn()) ;
            return true ;
        }
        return false ;
    }
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        return peekTokens.hasNext() ;
    }
   
    final protected boolean lookingAt(TokenType tokenType)
    {
        Token t = peekTokens.peek() ;
        if ( t == null  )
            return tokenType == EOF ;
        return t.hasType(tokenType) ;
    }
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        return t.hasType(tokenType) ;
    }
   
    final protected boolean lookingAtString()
    {
        Token t = peekTokens.peek() ;
        if ( t == null  )
            return false ;
        if ( t.hasType(TokenType.STRING1) ) return true ;
        if ( t.hasType(TokenType.STRING2) ) return true ;
        if ( t.hasType(TokenType.LONG_STRING1) ) return true ;
        if ( t.hasType(TokenType.LONG_STRING2) ) return true ;
        return false ;
    }
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        return false ;
    }
   
    final protected boolean lookingAtNumber()
    {
        Token t = peekTokens.peek() ;
        if ( t == null  )
            return false ;
        if ( t.hasType(TokenType.INTEGER) ) return true ;
        if ( t.hasType(TokenType.HEX) )     return true ;
        if ( t.hasType(TokenType.DECIMAL) ) return true ;
        if ( t.hasType(TokenType.DOUBLE) )  return true ;
        return false ;
    }
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