Package org.apache.jena.riot.tokens

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

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    }

    @Override
    protected final void runParser() {
        while (moreTokens()) {
            Token t = peekToken() ;
            if ( lookingAt(DIRECTIVE) ) {
                directive() ; // @form.
                continue ;
            }

            if ( lookingAt(KEYWORD) ) {
                if ( t.getImage().equalsIgnoreCase("PREFIX") || t.getImage().equalsIgnoreCase("BASE") ) {
                    directiveKeyword() ;
                    continue ;
                }
            }
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     * location
     */
    protected abstract void emit(Node subject, Node predicate, Node object) ;

    protected final void directiveKeyword() {
        Token t = peekToken() ;
        String x = t.getImage() ;
        nextToken() ;

        if ( x.equalsIgnoreCase("BASE") ) {
            directiveBase() ;
            return ;
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        exception(t, "Unrecognized keyword for directive: %s", x) ;
    }

    protected final void directive() {
        // It's a directive ...
        Token t = peekToken() ;
        String x = t.getImage() ;
        nextToken() ;

        if ( x.equals("base") ) {
            directiveBase() ;
            skipIf(DOT) ;
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        nextToken() ;
    }

    protected final void directiveBase() {
        Token token = peekToken() ;
        if ( !lookingAt(IRI) )
            exception(token, "@base requires an IRI (found '" + token + "')") ;

        String baseStr = token.getImage() ;
        dest.base(baseStr) ;
        IRI baseIRI = profile.makeIRI(baseStr, currLine, currCol) ;
        skipIf(DOT) ;
        nextToken() ;
        profile.getPrologue().setBaseURI(baseIRI) ;
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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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        Node listHead = null ;

        startList() ;

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

            if ( lookingAt(RPAREN) ) {
                nextToken() ;
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    }
   
    @Override
    protected final Triple parseOne()
    {
        Token sToken = nextToken() ;
        if ( sToken.isEOF() )
            exception(sToken, "Premature end of file: %s", sToken) ;
       
        Token pToken = nextToken() ;
        if ( pToken.isEOF() )
            exception(pToken, "Premature end of file: %s", pToken) ;
       
        Token oToken = nextToken() ;
        if ( oToken.isEOF() )
            exception(oToken, "Premature end of file: %s", oToken) ;

        // Check in createTriple - but this is cheap so do it anyway.
        checkIRIOrBNode(sToken) ;
        checkIRI(pToken) ;
        checkRDFTerm(oToken) ;
        Token x = nextToken() ;
       
        if ( x.getType() != TokenType.DOT )
            exception(x, "Triple not terminated by DOT: %s", x) ;
//        Node s = X ;
//        Node p = X ;
//        Node o = X ;
//        return T ;
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    }
   
    @Override
    protected final Quad parseOne()
    {
        Token sToken = nextToken() ;
        if ( sToken.getType() == TokenType.EOF )
            exception(sToken, "Premature end of file: %s", sToken) ;
       
        Token pToken = nextToken() ;
        if ( pToken.getType() == TokenType.EOF )
            exception(pToken, "Premature end of file: %s", pToken) ;
       
        Token oToken = nextToken() ;
        if ( oToken.getType() == TokenType.EOF )
            exception(oToken, "Premature end of file: %s", oToken) ;
       
        Token xToken = nextToken() ;    // Maybe DOT
        if ( xToken.getType() == TokenType.EOF )
            exception(xToken, "Premature end of file: Quad not terminated by DOT: %s", xToken) ;
       
        // Process graph node first, before S,P,O
        // to set bnode label scope (if not global)
        Node c = null ;

        if ( xToken.getType() != TokenType.DOT )
        {
            // Allow bNodes for graph names.
            checkIRIOrBNode(xToken) ;
            // Allow only IRIs
            //checkIRI(xToken) ;
            c = tokenAsNode(xToken) ;
            xToken = nextToken() ;
            currentGraph = c ;
        }
        else
        {
            c = Quad.defaultGraphNodeGenerated ;
            currentGraph = null ;
        }
       
        // createQuad may also check but these checks are cheap and do form syntax errors.
        checkIRIOrBNode(sToken) ;
        checkIRI(pToken) ;
        checkRDFTerm(oToken) ;
        // xToken already checked.

        Node s = tokenAsNode(sToken) ;
        Node p = tokenAsNode(pToken) ;
        Node o = tokenAsNode(oToken) ;
       
        // Check end of tuple.
       
        if ( xToken.getType() != TokenType.DOT )
            exception(xToken, "Quad not terminated by DOT: %s", xToken) ;
       
        return profile.createQuad(c, s, p, o, sToken.getLine(), sToken.getColumn()) ;
    }
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