Examples with JexlExpression org.apache.commons.jexl3.JexlExpression used on opensource projects

Example 21 with JexlExpression

use of org.apache.commons.jexl3.JexlExpression in project commons-jexl by apache.

the class SandboxTest method testGetNullKeyAllowed0.

@Test
public void testGetNullKeyAllowed0() throws Exception {
    JexlEngine jexl = new JexlBuilder().sandbox(new JexlSandbox(true)).create();
    JexlExpression expression = jexl.createExpression("{null : 'foo'}[null]");
    Object o = expression.evaluate(null);
    Assert.assertEquals("foo", o);
}

Example 22 with JexlExpression

use of org.apache.commons.jexl3.JexlExpression in project commons-jexl by apache.

the class SandboxTest method testSetNullKeyAllowed0.

@Test
public void testSetNullKeyAllowed0() throws Exception {
    Arithmetic350 a350 = new Arithmetic350(true);
    JexlEngine jexl = new JexlBuilder().arithmetic(a350).sandbox(new JexlSandbox(true)).create();
    JexlContext jc = new MapContext();
    JexlExpression expression = jexl.createExpression("{null : 'foo'}[null] = 'bar'");
    expression.evaluate(jc);
    Map<?, ?> map = a350.getLastMap();
    Assert.assertEquals("bar", map.get(null));
}

Example 23 with JexlExpression

use of org.apache.commons.jexl3.JexlExpression in project commons-jexl by apache.

the class ArrayTest method example.

/**
 * An example for array access.
 */
static void example(final Output out) throws Exception {
    /*
         * First step is to retrieve an instance of a JexlEngine;
         * it might be already existing and shared or created anew.
         */
    final JexlEngine jexl = new JexlBuilder().create();
    /*
         *  Second make a jexlContext and put stuff in it
         */
    final JexlContext jc = new MapContext();
    final List<Object> l = new ArrayList<Object>();
    l.add("Hello from location 0");
    final Integer two = 2;
    l.add(two);
    jc.set("array", l);
    JexlExpression e = jexl.createExpression("array[1]");
    Object o = e.evaluate(jc);
    out.print("Object @ location 1 = ", o, two);
    e = jexl.createExpression("array[0].length()");
    o = e.evaluate(jc);
    out.print("The length of the string at location 0 is : ", o, 21);
}

Example 24 with JexlExpression

use of org.apache.commons.jexl3.JexlExpression in project newts by OpenNMS.

the class ResultDescriptor method expression.

public ResultDescriptor expression(String label, String expression) {
    final JexlExpression expr = JEXL_ENGINE.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 25 with JexlExpression

use of org.apache.commons.jexl3.JexlExpression in project dbeaver by serge-rider.

the class EditVirtualAttributePage method generatePreviewValue.

private void generatePreviewValue() {
    if (viewer == null) {
        return;
    }
    String expression = expressionText.getText();
    ResultSetRow currentRow = viewer.getCurrentRow();
    if (currentRow == null) {
        previewText.setText("Select a row in data viewer to see expression results");
        return;
    }
    try {
        JexlExpression parsedExpression = DBVUtils.parseExpression(expression);
        Object result = DBVUtils.evaluateDataExpression(viewer.getModel().getAttributes(), currentRow.values, parsedExpression, nameText.getText());
        previewText.setText(CommonUtils.toString(result));
    } catch (Exception e) {
        previewText.setText(GeneralUtils.getExpressionParseMessage(e));
    }
}