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

Example 6 with Expression

use of org.apache.commons.jexl2.Expression 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 7 with Expression

use of org.apache.commons.jexl2.Expression in project dbeaver by serge-rider.

the class AbstractDescriptor method parseExpression.

public static Expression parseExpression(String exprString) throws DBException {
    synchronized (AbstractDescriptor.class) {
        if (jexlEngine == null) {
            jexlEngine = new JexlEngine(null, null, null, null);
            jexlEngine.setCache(100);
        }
    }
    try {
        return jexlEngine.createExpression(exprString);
    } catch (JexlException e) {
        throw new DBException("Bad expression", e);
    }
}

Example 8 with Expression

use of org.apache.commons.jexl2.Expression 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 Expression

use of org.apache.commons.jexl2.Expression 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 Expression

use of org.apache.commons.jexl2.Expression 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;
}