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Home Page: https://carpo.readthedocs.io/en/latest
Case Management Framework
Home Page: https://carpo.readthedocs.io/en/latest
In order to extract a series of nested properties, we need to create a complex series of calls. If we had a structure like this:
{
"a": {
"objectValue": {
"stringValue": "value"
}
}
}
In order to get the value we would need to do something like this
class Example {
String getValue(PropertyHoldingEntity entity) {
PropertyCollection propertyCollection = entity.getProperties();
Optional<Property> subPropertyA = propertyCollection.getObjectByKey("a", Property.class);
Optional<Property> valueA = subPropertyA.flatMap(p -> p.getObjectValue(Property.class));
Optional<String> stringValue = valueA.flatMap(Property::getStringValue);
return stringValue.orElse("");
}
}
A better solution would be to allow json style path to be mapped to it.
public interface PropertyMapper {
Optional<String> getStringValue(PropertyHoldingEntity entity, String path);
}
class Example {
String getValue(PropertyHoldingEntity entity) {
PropertyMapper propertyMapper = new PropertyMapper();
return propertyMapper.getStringValue(entity, "a.object.string").orElse("");
}
}
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