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

Example 11 with JexlEngine

use of org.apache.commons.jexl3.JexlEngine in project dhis2-core by dhis2.

the class ExpressionUtils method evaluate.

/**
     * @param expression the expression.
     * @param vars the variables, can be null.
     * @param strict indicates whether to use strict or lenient engine mode.
     * @return the result of the evaluation.
     */
private static Object evaluate(String expression, Map<String, Object> vars, boolean strict) {
    expression = expression.replaceAll(IGNORED_KEYWORDS_REGEX, StringUtils.EMPTY);
    JexlEngine engine = strict ? JEXL_STRICT : JEXL;
    Expression exp = engine.createExpression(expression);
    JexlContext context = vars != null ? new MapContext(vars) : new MapContext();
    return exp.evaluate(context);
}

Example 12 with JexlEngine

use of org.apache.commons.jexl3.JexlEngine in project nutch by apache.

the class JexlUtil method parseExpression.

/**
 * Parses the given experssion to a Jexl expression. This supports
 * date parsing.
 *
 * @param expr the Jexl expression
 * @return parsed Jexl expression or null in case of parse error
 */
public static Expression parseExpression(String expr) {
    if (expr == null)
        return null;
    try {
        // Translate any date object into a long, dates must be specified as 20-03-2016T00:00:00Z
        Matcher matcher = datePattern.matcher(expr);
        if (matcher.find()) {
            String date = matcher.group();
            // Parse the thing and get epoch!
            Date parsedDate = DateUtils.parseDateStrictly(date, new String[] { "yyyy-MM-dd'T'HH:mm:ss'Z'" });
            long time = parsedDate.getTime();
            // Replace in the original expression
            expr = expr.replace(date, Long.toString(time));
        }
        JexlEngine jexl = new JexlEngine();
        jexl.setSilent(true);
        jexl.setStrict(true);
        return jexl.createExpression(expr);
    } catch (Exception e) {
        LOG.error(e.getMessage());
    }
    return null;
}