Examples with MapContext org.apache.commons.jexl2.MapContext used on opensource projects

Example 6 with MapContext

use of org.apache.commons.jexl2.MapContext in project shifu by ShifuML.

the class DataNormalizeWorker method normalizeRecord.

/**
     * Normalize the training data record
     * 
     * @param rfs
     *            - record fields
     * @return the data after normalization
     */
private List<Double> normalizeRecord(String[] rfs) {
    List<Double> retDouList = new ArrayList<Double>();
    if (rfs == null || rfs.length == 0) {
        return null;
    }
    String tag = CommonUtils.trimTag(rfs[this.targetColumnNum]);
    boolean isNotSampled = DataSampler.isNotSampled(modelConfig.getPosTags(), modelConfig.getNegTags(), modelConfig.getNormalizeSampleRate(), modelConfig.isNormalizeSampleNegOnly(), tag);
    if (isNotSampled) {
        return null;
    }
    JexlContext jc = new MapContext();
    Double cutoff = modelConfig.getNormalizeStdDevCutOff();
    for (int i = 0; i < rfs.length; i++) {
        ColumnConfig config = columnConfigList.get(i);
        if (weightExpr != null) {
            jc.set(config.getColumnName(), rfs[i]);
        }
        if (this.targetColumnNum == i) {
            if (modelConfig.getPosTags().contains(tag)) {
                retDouList.add(Double.valueOf(1));
            } else if (modelConfig.getNegTags().contains(tag)) {
                retDouList.add(Double.valueOf(0));
            } else {
                log.error("Invalid data! The target value is not listed - " + tag);
                // Return null to skip such record.
                return null;
            }
        } else if (!CommonUtils.isGoodCandidate(config)) {
            retDouList.add(null);
        } else {
            String val = (rfs[i] == null) ? "" : rfs[i];
            retDouList.add(Normalizer.normalize(config, val, cutoff, modelConfig.getNormalizeType()));
        }
    }
    double weight = 1.0d;
    if (weightExpr != null) {
        Object result = weightExpr.evaluate(jc);
        if (result instanceof Integer) {
            weight = ((Integer) result).doubleValue();
        } else if (result instanceof Double) {
            weight = ((Double) result).doubleValue();
        } else if (result instanceof String) {
            // add to parse String data
            try {
                weight = Double.parseDouble((String) result);
            } catch (NumberFormatException e) {
                // Not a number, use default
                if (System.currentTimeMillis() % 100 == 0) {
                    log.warn("Weight column type is String and value cannot be parsed with {}, use default 1.0d.", result);
                }
                weight = 1.0d;
            }
        }
    }
    retDouList.add(weight);
    return retDouList;
}

Example 7 with MapContext

use of org.apache.commons.jexl2.MapContext in project newts by OpenNMS.

the class ResultDescriptor method expression.

public ResultDescriptor expression(String label, String expression) {
    final JexlEngine je = new JexlEngine();
    final Expression expr = je.createExpression(expression);
    final String[] labels = getLabels().toArray(new String[0]);
    CalculationFunction evaluate = new CalculationFunction() {

        private static final long serialVersionUID = -3328049421398096252L;

        @Override
        public double apply(double... ds) {
            JexlContext jc = new MapContext();
            for (int i = 0; i < labels.length; i++) {
                jc.set(labels[i], ds[i]);
            }
            return ((Number) expr.evaluate(jc)).doubleValue();
        }
    };
    return calculate(label, evaluate, labels);
}

Example 8 with MapContext

use of org.apache.commons.jexl2.MapContext in project opennms by OpenNMS.

the class JasperReportService method evaluateToString.

public static String evaluateToString(JasperReport report, JRExpression expression) {
    Objects.requireNonNull(report);
    Objects.requireNonNull(expression);
    SubreportExpressionVisitor visitor = new SubreportExpressionVisitor(report);
    String string = visitor.visit(expression);
    if (string != null) {
        JexlEngine engine = new JexlEngine();
        return (String) engine.createExpression(string).evaluate(new MapContext());
    }
    return null;
}

Example 9 with MapContext

use of org.apache.commons.jexl2.MapContext in project opennms by OpenNMS.

the class ExpressionConfigWrapper method evaluate.

@Override
public double evaluate(Map<String, Double> values) throws ThresholdExpressionException {
    // Add all of the variable values to the script context
    Map<String, Object> context = new HashMap<String, Object>();
    context.putAll(values);
    // To workaround NMS-5019
    context.put("datasources", new HashMap<String, Double>(values));
    context.put("math", new MathBinding());
    double result = Double.NaN;
    try {
        // Fetch an instance of the JEXL script engine to evaluate the script expression
        Object resultObject = new JexlEngine().createExpression(m_expression.getExpression()).evaluate(new MapContext(context));
        result = Double.parseDouble(resultObject.toString());
    } catch (Throwable e) {
        throw new ThresholdExpressionException("Error while evaluating expression " + m_expression.getExpression() + ": " + e.getMessage(), e);
    }
    return result;
}

Example 10 with MapContext

use of org.apache.commons.jexl2.MapContext in project jmeter by apache.

the class Jexl2Function method execute.

/** {@inheritDoc} */
@Override
public String execute(SampleResult previousResult, Sampler currentSampler) throws InvalidVariableException {
    //$NON-NLS-1$
    String str = "";
    CompoundVariable var = (CompoundVariable) values[0];
    String exp = var.execute();
    //$NON-NLS-1$
    String varName = "";
    if (values.length > 1) {
        varName = ((CompoundVariable) values[1]).execute().trim();
    }
    JMeterContext jmctx = JMeterContextService.getContext();
    JMeterVariables vars = jmctx.getVariables();
    try {
        JexlContext jc = new MapContext();
        //$NON-NLS-1$
        jc.set("log", log);
        //$NON-NLS-1$
        jc.set("ctx", jmctx);
        //$NON-NLS-1$
        jc.set("vars", vars);
        //$NON-NLS-1$
        jc.set("props", JMeterUtils.getJMeterProperties());
        // Previously mis-spelt as theadName
        //$NON-NLS-1$
        jc.set("threadName", Thread.currentThread().getName());
        //$NON-NLS-1$ (may be null)
        jc.set("sampler", currentSampler);
        //$NON-NLS-1$ (may be null)
        jc.set("sampleResult", previousResult);
        //$NON-NLS-1$
        jc.set("OUT", System.out);
        // Now evaluate the script, getting the result
        Expression e = getJexlEngine().createExpression(exp);
        Object o = e.evaluate(jc);
        if (o != null) {
            str = o.toString();
        }
        if (vars != null && varName.length() > 0) {
            // vars will be null on TestPlan
            vars.put(varName, str);
        }
    } catch (Exception e) {
        log.error("An error occurred while evaluating the expression \"" + exp + "\"\n", e);
    }
    return str;
}