Examples with ReflectionObjectHandler com.github.mustachejava.reflect.ReflectionObjectHandler used on opensource projects

Example 1 with ReflectionObjectHandler

use of com.github.mustachejava.reflect.ReflectionObjectHandler in project dcos-commons by mesosphere.

the class TemplateUtils method renderMustache.

/**
 * Renders a given Mustache template using the provided value map, returning any template parameters which weren't
 * present in the map.
 *
 * @param templateName descriptive name of template to show in logs
 * @param templateContent String representation of template
 * @param values Map of values to be inserted into the template
 * @param missingValues List where missing value entries will be added for any template params in
 *     {@code templateContent} which are not found in {@code values}
 * @return Rendered Mustache template String
 */
public static String renderMustache(String templateName, String templateContent, Map<String, String> values, final List<MissingValue> missingValues) {
    StringWriter writer = new StringWriter();
    DefaultMustacheFactory mustacheFactory = new DefaultMustacheFactory();
    mustacheFactory.setObjectHandler(new ReflectionObjectHandler() {

        @Override
        public Binding createBinding(String name, final TemplateContext tc, Code code) {
            return new MissingValueBinding(this, name, tc, code, missingValues);
        }
    });
    Map<String, Object> objEnv = new HashMap<>();
    for (Map.Entry<String, String> entry : values.entrySet()) {
        if (StringUtils.equalsIgnoreCase(entry.getValue(), "false") || StringUtils.equalsIgnoreCase(entry.getValue(), "true")) {
            objEnv.put(entry.getKey(), Boolean.valueOf(entry.getValue()));
        } else {
            objEnv.put(entry.getKey(), entry.getValue());
        }
    }
    mustacheFactory.compile(new StringReader(templateContent), templateName).execute(writer, objEnv);
    return writer.toString();
}