Examples with ListValueProvider org.camunda.bpm.engine.impl.core.variable.mapping.value.ListValueProvider used on opensource projects

Example 1 with ListValueProvider

use of org.camunda.bpm.engine.impl.core.variable.mapping.value.ListValueProvider in project camunda-bpm-platform by camunda.

the class BpmnParseUtil method parseParamValueProvider.

/**
 * @throws BpmnParseException if the parameter is invalid
 */
protected static ParameterValueProvider parseParamValueProvider(Element parameterElement) {
    // LIST
    if ("list".equals(parameterElement.getTagName())) {
        List<ParameterValueProvider> providerList = new ArrayList<ParameterValueProvider>();
        for (Element element : parameterElement.elements()) {
            // parse nested provider
            providerList.add(parseParamValueProvider(element));
        }
        return new ListValueProvider(providerList);
    }
    // MAP
    if ("map".equals(parameterElement.getTagName())) {
        TreeMap<ParameterValueProvider, ParameterValueProvider> providerMap = new TreeMap<ParameterValueProvider, ParameterValueProvider>();
        for (Element entryElement : parameterElement.elements("entry")) {
            // entry must provide key
            String keyAttribute = entryElement.attribute("key");
            if (keyAttribute == null || keyAttribute.isEmpty()) {
                throw new BpmnParseException("Missing attribute 'key' for 'entry' element", entryElement);
            }
            // parse nested provider
            providerMap.put(new ElValueProvider(getExpressionManager().createExpression(keyAttribute)), parseNestedParamValueProvider(entryElement));
        }
        return new MapValueProvider(providerMap);
    }
    // SCRIPT
    if ("script".equals(parameterElement.getTagName())) {
        ExecutableScript executableScript = parseCamundaScript(parameterElement);
        if (executableScript != null) {
            return new ScriptValueProvider(executableScript);
        } else {
            return new NullValueProvider();
        }
    }
    String textContent = parameterElement.getText().trim();
    if (!textContent.isEmpty()) {
        // EL
        return new ElValueProvider(getExpressionManager().createExpression(textContent));
    } else {
        // NULL value
        return new NullValueProvider();
    }
}