nl.vpro.domain.JsonProperties Maven / Gradle / Ivy
package nl.vpro.domain;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* An enum can be made to extend this, which indicates that an extra method will be present {@link #getJsonPropertyValue()}} which
* will be the {@link JsonProperty} of the enum value.
*
* Normally this would be {@link Enum#name()}}, but sometimes this is overriden, via the said annotation, and you need programmatic access to it.
*
* @author Michiel Meeuwissen
* @since 8.0
* @see XmlValued
*/
public interface JsonProperties {
default String getJsonPropertyValue() {
if (this instanceof Enum) {
Class enumClass = getClass();
String name = ((Enum) this).name();
try {
JsonProperty jsonValue = enumClass.getField(name).getAnnotation(JsonProperty.class);
return jsonValue.value();
} catch (NoSuchFieldException | NullPointerException e) {
return name;
}
}
throw new UnsupportedOperationException("Only supported for enums");
}
/**
*
*/
static & JsonProperties> E valueOfJson(E[] values, String value) {
for (E v : values) {
if (v.getJsonPropertyValue().equals(value)) {
return v;
}
}
throw new IllegalArgumentException("No constant with json value " + value);
}
}