com.stripe.model.EventDataDeserializer Maven / Gradle / Ivy
package com.stripe.model;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.stripe.net.ApiResource;
import com.stripe.net.UntypedMapDeserializer;
import java.lang.reflect.Type;
import java.util.Map;
public class EventDataDeserializer implements JsonDeserializer {
private static final UntypedMapDeserializer UNTYPED_MAP_DESERIALIZER =
new UntypedMapDeserializer();
/**
* Deserializes the JSON payload contained in an event's {@code data} attribute into an {@link
* EventData} instance.
*/
@Override
public EventData deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws JsonParseException {
EventData eventData = new EventData();
JsonObject jsonObject = json.getAsJsonObject();
for (Map.Entry entry : jsonObject.entrySet()) {
String key = entry.getKey();
JsonElement element = entry.getValue();
if ("previous_attributes".equals(key)) {
if (element.isJsonNull()) {
eventData.setPreviousAttributes(null);
} else if (element.isJsonObject()) {
Map previousAttributes =
UNTYPED_MAP_DESERIALIZER.deserialize(element.getAsJsonObject());
eventData.setPreviousAttributes(previousAttributes);
}
} else if ("object".equals(key)) {
eventData.setObject(entry.getValue().getAsJsonObject());
}
}
return eventData;
}
/**
* Deserialize JSON into super class {@code StripeObject} where the underlying concrete class
* corresponds to type specified in root-level {@code object} field of the JSON input.
*
* Note that the expected JSON input is data at the {@code object} value, as a sibling to
* {@code previousAttributes}, and not the discriminator field containing a string.
*
* @return JSON data to be deserialized to super class {@code StripeObject}
*/
static StripeObject deserializeStripeObject(JsonObject eventDataObjectJson) {
String type = eventDataObjectJson.getAsJsonObject().get("object").getAsString();
Class cl = EventDataClassLookup.findClass(type);
return ApiResource.GSON.fromJson(
eventDataObjectJson, cl != null ? cl : StripeRawJsonObject.class);
}
}