Package edu.uci.ics.hyracks.algebricks.core.algebra.expressions

Examples of edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IAlgebricksConstantValue

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    @Override
    public IScalarEvaluatorFactory createEvaluatorFactory(ILogicalExpression expr, IVariableTypeEnvironment env,
            IOperatorSchema[] inputSchemas, JobGenContext context) throws AlgebricksException {
        switch (expr.getExpressionTag()) {
            case CONSTANT:
                IAlgebricksConstantValue constantValue = (IAlgebricksConstantValue) ((ConstantExpression) expr).getValue();
                if (constantValue.isFalse()) {
                    IPointable p = (BooleanPointable) BooleanPointable.FACTORY.createPointable();
                    XDMConstants.setFalse(p);
                    return new ConstantEvaluatorFactory(p.getByteArray());
                } else if (constantValue.isNull()) {
                    IPointable p = (VoidPointable) VoidPointable.FACTORY.createPointable();
                    XDMConstants.setEmptySequence(p);
                    return new ConstantEvaluatorFactory(p.getByteArray());
                } else if (constantValue.isTrue()) {
                    IPointable p = (BooleanPointable) BooleanPointable.FACTORY.createPointable();
                    XDMConstants.setTrue(p);
                    return new ConstantEvaluatorFactory(p.getByteArray());
                }
                VXQueryConstantValue cv = (VXQueryConstantValue) ((ConstantExpression) expr).getValue();
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        this.ps = new PrintStream(os);
    }

    @Override
    public String visitConstantExpression(ConstantExpression expr, Integer indent) throws AlgebricksException {
        IAlgebricksConstantValue value = expr.getValue();
        if (value instanceof VXQueryConstantValue) {
            VXQueryConstantValue vxqValue = (VXQueryConstantValue) value;
            tvp.set(vxqValue.getValue(), 0, vxqValue.getValue().length);
            serializer.printTaggedValuePointable(ps, tvp);
            try {
                return vxqValue.getType() + ": " + os.toString("UTF8");
            } catch (UnsupportedEncodingException e) {
                // print stack trace and return the default
                e.printStackTrace();
            } finally {
                ps.flush();
                os.reset();
            }
        }
        return value.toString();
    }
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            @Override
            public Object getType(ILogicalExpression expr, IMetadataProvider<?, ?> metadataProvider,
                    IVariableTypeEnvironment env) throws AlgebricksException {
                if (expr.getExpressionTag() == LogicalExpressionTag.CONSTANT) {
                    ConstantExpression ce = (ConstantExpression) expr;
                    IAlgebricksConstantValue acv = ce.getValue();
                    if (acv == ConstantExpression.TRUE.getValue() || acv == ConstantExpression.FALSE.getValue()) {
                        return SequenceType.create(BuiltinTypeRegistry.XS_BOOLEAN, Quantifier.QUANT_ONE);
                    }
                    VXQueryConstantValue cv = (VXQueryConstantValue) acv;
                    return cv.getType();
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            @Override
            public Object getType(ILogicalExpression expr, IMetadataProvider<?, ?> metadataProvider,
                    IVariableTypeEnvironment env) throws AlgebricksException {
                if (expr.getExpressionTag() == LogicalExpressionTag.CONSTANT) {
                    ConstantExpression ce = (ConstantExpression) expr;
                    IAlgebricksConstantValue acv = ce.getValue();
                    if (acv == ConstantExpression.TRUE.getValue() || acv == ConstantExpression.FALSE.getValue()) {
                        return SequenceType.create(BuiltinTypeRegistry.XS_BOOLEAN, Quantifier.QUANT_ONE);
                    }
                    VXQueryConstantValue cv = (VXQueryConstantValue) acv;
                    return cv.getType();
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            @Override
            public Object getType(ILogicalExpression expr, IMetadataProvider<?, ?> metadataProvider,
                    IVariableTypeEnvironment env) throws AlgebricksException {
                if (expr.getExpressionTag() == LogicalExpressionTag.CONSTANT) {
                    ConstantExpression ce = (ConstantExpression) expr;
                    IAlgebricksConstantValue acv = ce.getValue();
                    if (acv == ConstantExpression.TRUE.getValue() || acv == ConstantExpression.FALSE.getValue()) {
                        return SequenceType.create(BuiltinTypeRegistry.XS_BOOLEAN, Quantifier.QUANT_ONE);
                    }
                    VXQueryConstantValue cv = (VXQueryConstantValue) acv;
                    return cv.getType();
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Related Classes of edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IAlgebricksConstantValue

  • org.apache.vxquery.compiler.algebricks.prettyprint.VXQueryLogicalExpressionPrettyPrintVisitor
  • org.apache.vxquery.compiler.algebricks.VXQueryExpressionRuntimeProvider
  • org.apache.vxquery.xmlquery.query.XMLQueryCompiler
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