Package org.jrdf.query.expression

Examples of org.jrdf.query.expression.Projection

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        return new SelectAnswerImpl(heading, result, System.currentTimeMillis() - timeStarted, hasProjected());
    }

    private LinkedHashSet<Attribute> getHeading(EvaluatedRelation relation) {
        if (hasProjected()) {
            Projection projection = (Projection) expression;
            return new LinkedHashSet<Attribute>(projection.getAttributes());
        } else {
            return new LinkedHashSet<Attribute>(relation.getSortedHeading());
        }
    }
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    public void caseAWildcardSelectClause(AWildcardSelectClause node) {
        try {
            WhereAnalyser analyser = analyseWhereClause(node.parent());
            Expression nextExpression = analyser.getExpression();
            declaredVariables.addAll(variableCollector.getAttributes().keySet());
            expression = new Projection(variableCollector, declaredVariables, nextExpression);
        } catch (ParserException e) {
            exception = e;
        }
    }
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    public void caseAVariableListSelectClause(AVariableListSelectClause node) {
        try {
            WhereAnalyser analyser = analyseWhereClause(node.parent());
            Expression nextExpression = analyser.getExpression();
            super.caseAVariableListSelectClause(node);
            expression = new Projection(variableCollector, declaredVariables, nextExpression);
        } catch (ParserException e) {
            exception = e;
        }
    }
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Related Classes of org.jrdf.query.expression.Projection

  • org.jrdf.query.relation.Attribute
  • org.jrdf.query.relation.mem.AttributeImpl
  • org.jrdf.query.relation.type.NodeType
  • org.jrdf.query.SelectQueryImpl
  • org.jrdf.sparql.analysis.ProjectAnalyserImpl
  • org.jrdf.sparql.parser.node.TIdentifier
  • org.jrdf.sparql.parser.parser.ParserException
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