Package org.apache.commons.jexl2

Examples of org.apache.commons.jexl2.JexlContext

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    public String evaluate(final String expression, final JexlContext jexlContext) {
        String result = "";

        if (StringUtils.isNotBlank(expression) && jexlContext != null) {
            try {
                Expression jexlExpression = jexlEngine.createExpression(expression);
                Object evaluated = jexlExpression.evaluate(jexlContext);
                if (evaluated != null) {
                    result = evaluated.toString();
                }
            } catch (JexlException e) {
                LOG.error("Invalid jexl expression: " + expression, e);
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     */
    @Override
    public FeatureState process(final ContextManager contextManager)
    {
        final JexlEngine jexlEngine = new JexlEngine();
        Expression jexlExpression;
        if (expression != null) {
            jexlExpression = jexlEngine.createExpression(expression);
        } else {
            jexlExpression = getOldExpression(jexlEngine);
        }
       
        final Map<String, Object> contextMap = contextManager.getContext(context);
        final JexlContext jexlContext = new MapContext(contextMap);

        return Boolean.TRUE.equals(jexlExpression.evaluate(jexlContext)) ? FeatureState.ENABLED : FeatureState.DISABLED;
    }
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     * @param expected is the expected value of the expression
     * @throws Exception if the expression could not be evaluationed or an assertion
     * fails
     */
    public void assertExpression(String expression, Object expected) throws Exception {
        Expression exp = engine.createExpression(expression);
        Object value = exp.evaluate(context);

        assertEquals("expression: " + expression, expected, value);
    }
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    public void failExpression(String expression, String matchException) throws Exception {
        boolean[] flags = { engine.isLenient(), engine.isSilent() };
        try {
            engine.setLenient(false);
            engine.setSilent(false);
            Expression exp = engine.createExpression(expression);
            exp.evaluate(context);
            fail("expression: " + expression);
        } catch(JexlException xjexl) {
            if (matchException != null && !xjexl.getMessage().matches(matchException)) {
                fail("expression: " + expression + ", expected: " + matchException + ", got " + xjexl.getMessage());
            }
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        return result;
    }

    public JexlContext addFieldsToContext(final Object attributable, final JexlContext jexlContext) {
        JexlContext context = jexlContext == null
                ? new MapContext()
                : jexlContext;

        final Field[] fields = attributable.getClass().getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            try {
                Field field = fields[i];
                field.setAccessible(true);
                final String fieldName = field.getName();
                if ((!field.isSynthetic()) && (!fieldName.startsWith("pc"))
                        && (!ArrayUtils.contains(IGNORE_FIELDS, fieldName))
                        && (!Iterable.class.isAssignableFrom(field.getType()))
                        && (!field.getType().isArray())) {

                    final Object fieldValue = field.get(attributable);

                    context.set(fieldName, fieldValue == null
                            ? ""
                            : (field.getType().equals(Date.class)
                            ? DataFormat.format((Date) fieldValue, false)
                            : fieldValue));
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    }

    public JexlContext addAttrsToContext(final Collection<? extends AbstractAttr> attributes,
            final JexlContext jexlContext) {

        JexlContext context = jexlContext == null
                ? new MapContext()
                : jexlContext;

        for (AbstractAttr attr : attributes) {
            List<String> attributeValues = attr.getValuesAsStrings();
            String expressionValue = attributeValues.isEmpty()
                    ? ""
                    : attributeValues.get(0);

            LOG.debug("Add attribute {} with value {}", attr.getSchema().getName(), expressionValue);

            context.set(attr.getSchema().getName(), expressionValue);
        }

        return context;
    }
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    }

    public JexlContext addDerAttrsToContext(final Collection<? extends AbstractDerAttr> derAttrs,
            final Collection<? extends AbstractAttr> attrs, final JexlContext jexlContext) {

        JexlContext context = jexlContext == null
                ? new MapContext()
                : jexlContext;

        for (AbstractDerAttr derAttr : derAttrs) {
            String expressionValue = derAttr.getValue(attrs);
            if (expressionValue == null) {
                expressionValue = "";
            }

            LOG.debug("Add derived attribute {} with value {}", derAttr.getDerivedSchema().getName(), expressionValue);

            context.set(derAttr.getDerivedSchema().getName(), expressionValue);
        }

        return context;
    }
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    }

    public JexlContext addVirAttrsToContext(final Collection<? extends AbstractVirAttr> virAttrs,
            final JexlContext jexlContext) {

        JexlContext context = jexlContext == null
                ? new MapContext()
                : jexlContext;

        for (AbstractVirAttr virAttr : virAttrs) {
            List<String> attributeValues = virAttr.getValues();
            String expressionValue = attributeValues.isEmpty()
                    ? ""
                    : attributeValues.get(0);

            LOG.debug("Add virtual attribute {} with value {}", virAttr.getVirtualSchema().getName(), expressionValue);

            context.set(virAttr.getVirtualSchema().getName(), expressionValue);
        }

        return context;
    }
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        return context;
    }

    public String evaluate(final String expression, final AbstractAttributableTO attributableTO) {
        final JexlContext context = new MapContext();

        addFieldsToContext(attributableTO, context);

        for (AttributeTO attr : attributableTO.getAttributes()) {
            List<String> values = attr.getValues();
            String expressionValue = values.isEmpty()
                    ? ""
                    : values.get(0);

            LOG.debug("Add attribute {} with value {}", attr.getSchema(), expressionValue);

            context.set(attr.getSchema(), expressionValue);
        }
        for (AttributeTO derAttr : attributableTO.getDerivedAttributes()) {
            List<String> values = derAttr.getValues();
            String expressionValue = values.isEmpty()
                    ? ""
                    : values.get(0);

            LOG.debug("Add derived attribute {} with value {}", derAttr.getSchema(), expressionValue);

            context.set(derAttr.getSchema(), expressionValue);
        }
        for (AttributeTO virAttr : attributableTO.getVirtualAttributes()) {
            List<String> values = virAttr.getValues();
            String expressionValue = values.isEmpty()
                    ? ""
                    : values.get(0);

            LOG.debug("Add virtual attribute {} with value {}", virAttr.getSchema(), expressionValue);

            context.set(virAttr.getSchema(), expressionValue);
        }

        // Evaluate expression using the context prepared before
        return evaluate(expression, context);
    }
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        } else {
            jexlExpression = getOldExpression(jexlEngine);
        }
       
        final Map<String, Object> contextMap = contextManager.getContext(context);
        final JexlContext jexlContext = new MapContext(contextMap);

        return Boolean.TRUE.equals(jexlExpression.evaluate(jexlContext)) ? FeatureState.ENABLED : FeatureState.DISABLED;
    }
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