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Subscription Json generated using ApiResource.GSON.toJson is not able to get converted in model again using ApiResource.GSON.fromJson #1925

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@sashubelt

Description

Describe the bug

Generate JSON from to jeson method

String json = ApiResource.GSON.toJson(Subscription.retrieve("sub_1QL3OEFMxpe1bhsdExkQGaSA"));

Now create the model from generated json :

Subscription subs = ApiResource.GSON.fromJson(json, Subscription.class);

If the Json generated has following data the fromJson method breaks at this com.stripe.model.PaymentSourceTypeAdapterFactory line 50:

"default_source": {
 "id": "card_xxxxxAFMxpe1bhsdxxxxxxx"
 }

Generated Example Json :

{
 "automatic_tax": {
 "enabled": false
 },
 "billing_cycle_anchor": 1731626859,
 "cancel_at_period_end": false,
 "cancellation_details": {},
 "collection_method": "charge_automatically",
 "created": 1731592038,
 "currency": "usd",
 "current_period_end": 1763162859,
 "current_period_start": 1731626859,
 "customer": {
 "id": "cus_RDUL2neF83DgTI"
 },
 "default_source": {
 "id": "card_1QL3OAFMxpe1bhsdof3pn97j"
 },
 "default_tax_rates": [],
 "discounts": [],
 "id": "sub_1QL3OEFMxpe1bhsdExkQGaSA",
 "invoice_settings": {
 "issuer": {
 "type": "self"
 }
 },
 "items": {
 "object": "list",
 "data": [
 {
 "created": 1731592762,
 "discounts": [],
 "id": "si_RDUZp0IBRQgWqO",
 "metadata": {},
 "object": "subscription_item",
 "plan": {
 "active": true,
 "amount": 15000,
 "amount_decimal": 15000,
 "billing_scheme": "per_unit",
 "created": 1695754337,
 "currency": "usd",
 "id": "price_1NugMnFMxpe1bhsddxbfMvf2",
 "interval": "year",
 "interval_count": 1,
 "livemode": false,
 "metadata": {
 "active": "true"
 },
 "nickname": "ACTIVE Yearly",
 "object": "plan",
 "product": {
 "id": "prod_OdsYZw3Bn5ZCP1"
 },
 "trial_period_days": 14,
 "usage_type": "licensed"
 },
 "price": {
 "active": true,
 "billing_scheme": "per_unit",
 "created": 1695754337,
 "currency": "usd",
 "id": "price_1NugMnFMxpe1bhsddxbfMvf2",
 "livemode": false,
 "metadata": {
 "active": "true"
 },
 "nickname": "ACTIVE Yearly",
 "object": "price",
 "product": {
 "id": "prod_OdsYZw3Bn5ZCP1"
 },
 "recurring": {
 "interval": "year",
 "interval_count": 1,
 "trial_period_days": 14,
 "usage_type": "licensed"
 },
 "tax_behavior": "unspecified",
 "type": "recurring",
 "unit_amount": 15000,
 "unit_amount_decimal": 15000
 },
 "quantity": 50,
 "subscription": "sub_1QL3OEFMxpe1bhsdExkQGaSA",
 "tax_rates": []
 }
 ],
 "has_more": false,
 "url": "/v1/subscription_items?subscription=sub_1QL3OEFMxpe1bhsdExkQGaSA"
 },
 "latest_invoice": {
 "id": "in_1QLCRrFMxpe1bhsdInM5NsM9"
 },
 "livemode": false,
 "metadata": {},
 "object": "subscription",
 "payment_settings": {
 "save_default_payment_method": "off"
 },
 "start_date": 1731592038,
 "status": "active",
 "trial_end": 1731626858,
 "trial_settings": {
 "end_behavior": {
 "missing_payment_method": "create_invoice"
 }
 },
 "trial_start": 1731592761
}

Exception Stack Trace:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "com.google.gson.JsonPrimitive.getAsString()" because the return value of "com.google.gson.JsonObject.getAsJsonPrimitive(String)" is null
	at com.stripe.model.PaymentSourceTypeAdapterFactory1ドル.read(PaymentSourceTypeAdapterFactory.java:50)
	at com.stripe.model.PaymentSourceTypeAdapterFactory1ドル.read(PaymentSourceTypeAdapterFactory.java:40)
	at com.google.gson.TypeAdapter1ドル.read(TypeAdapter.java:204)
	at com.google.gson.Gson.fromJson(Gson.java:1227)
	at com.google.gson.Gson.fromJson(Gson.java:1329)
	at com.google.gson.Gson.fromJson(Gson.java:1300)
	at com.google.gson.internal.bind.TreeTypeAdapter$GsonContextImpl.deserialize(TreeTypeAdapter.java:179)
	at com.stripe.model.ExpandableFieldDeserializer.deserialize(ExpandableFieldDeserializer.java:47)
	at com.stripe.model.ExpandableFieldDeserializer.deserialize(ExpandableFieldDeserializer.java:12)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:76)
	at com.stripe.net.StripeCollectionItemTypeSettingFactory1ドル.read(StripeCollectionItemTypeSettingFactory.java:25)
	at com.stripe.net.StripeResponseGetterSettingTypeAdapterFactory1ドル.read(StripeResponseGetterSettingTypeAdapterFactory.java:26)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory1ドル.readIntoField(ReflectiveTypeAdapterFactory.java:212)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.readField(ReflectiveTypeAdapterFactory.java:433)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:393)
	at com.stripe.net.StripeCollectionItemTypeSettingFactory1ドル.read(StripeCollectionItemTypeSettingFactory.java:25)
	at com.stripe.net.StripeResponseGetterSettingTypeAdapterFactory1ドル.read(StripeResponseGetterSettingTypeAdapterFactory.java:26)
	at com.google.gson.Gson.fromJson(Gson.java:1227)
	at com.google.gson.Gson.fromJson(Gson.java:1137)
	at com.google.gson.Gson.fromJson(Gson.java:1047)
	at com.google.gson.Gson.fromJson(Gson.java:982)
	at com.stripe.main.StripeClient.main(StripeClient.java:37)

To Reproduce

Generate JSON from to jeson method

String json = ApiResource.GSON.toJson(Subscription.retrieve("sub_1QL3OEFMxpe1bhsdExkQGaSA"));

Now create the model from generated json :

Subscription subs = ApiResource.GSON.fromJson(json, Subscription.class);

If the Json generated has following data the fromJson method breaks at this com.stripe.model.PaymentSourceTypeAdapterFactory line 50:

"default_source": {
 "id": "card_xxxxxAFMxpe1bhsdxxxxxxx"
 }

Generated Example Json :

{
 "automatic_tax": {
 "enabled": false
 },
 "billing_cycle_anchor": 1731626859,
 "cancel_at_period_end": false,
 "cancellation_details": {},
 "collection_method": "charge_automatically",
 "created": 1731592038,
 "currency": "usd",
 "current_period_end": 1763162859,
 "current_period_start": 1731626859,
 "customer": {
 "id": "cus_RDUL2neF83DgTI"
 },
 "default_source": {
 "id": "card_1QL3OAFMxpe1bhsdof3pn97j"
 },
 "default_tax_rates": [],
 "discounts": [],
 "id": "sub_1QL3OEFMxpe1bhsdExkQGaSA",
 "invoice_settings": {
 "issuer": {
 "type": "self"
 }
 },
 "items": {
 "object": "list",
 "data": [
 {
 "created": 1731592762,
 "discounts": [],
 "id": "si_RDUZp0IBRQgWqO",
 "metadata": {},
 "object": "subscription_item",
 "plan": {
 "active": true,
 "amount": 15000,
 "amount_decimal": 15000,
 "billing_scheme": "per_unit",
 "created": 1695754337,
 "currency": "usd",
 "id": "price_1NugMnFMxpe1bhsddxbfMvf2",
 "interval": "year",
 "interval_count": 1,
 "livemode": false,
 "metadata": {
 "active": "true"
 },
 "nickname": "ACTIVE Yearly",
 "object": "plan",
 "product": {
 "id": "prod_OdsYZw3Bn5ZCP1"
 },
 "trial_period_days": 14,
 "usage_type": "licensed"
 },
 "price": {
 "active": true,
 "billing_scheme": "per_unit",
 "created": 1695754337,
 "currency": "usd",
 "id": "price_1NugMnFMxpe1bhsddxbfMvf2",
 "livemode": false,
 "metadata": {
 "active": "true"
 },
 "nickname": "ACTIVE Yearly",
 "object": "price",
 "product": {
 "id": "prod_OdsYZw3Bn5ZCP1"
 },
 "recurring": {
 "interval": "year",
 "interval_count": 1,
 "trial_period_days": 14,
 "usage_type": "licensed"
 },
 "tax_behavior": "unspecified",
 "type": "recurring",
 "unit_amount": 15000,
 "unit_amount_decimal": 15000
 },
 "quantity": 50,
 "subscription": "sub_1QL3OEFMxpe1bhsdExkQGaSA",
 "tax_rates": []
 }
 ],
 "has_more": false,
 "url": "/v1/subscription_items?subscription=sub_1QL3OEFMxpe1bhsdExkQGaSA"
 },
 "latest_invoice": {
 "id": "in_1QLCRrFMxpe1bhsdInM5NsM9"
 },
 "livemode": false,
 "metadata": {},
 "object": "subscription",
 "payment_settings": {
 "save_default_payment_method": "off"
 },
 "start_date": 1731592038,
 "status": "active",
 "trial_end": 1731626858,
 "trial_settings": {
 "end_behavior": {
 "missing_payment_method": "create_invoice"
 }
 },
 "trial_start": 1731592761
}

Exception Stack Trace:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "com.google.gson.JsonPrimitive.getAsString()" because the return value of "com.google.gson.JsonObject.getAsJsonPrimitive(String)" is null
	at com.stripe.model.PaymentSourceTypeAdapterFactory1ドル.read(PaymentSourceTypeAdapterFactory.java:50)
	at com.stripe.model.PaymentSourceTypeAdapterFactory1ドル.read(PaymentSourceTypeAdapterFactory.java:40)
	at com.google.gson.TypeAdapter1ドル.read(TypeAdapter.java:204)
	at com.google.gson.Gson.fromJson(Gson.java:1227)
	at com.google.gson.Gson.fromJson(Gson.java:1329)
	at com.google.gson.Gson.fromJson(Gson.java:1300)
	at com.google.gson.internal.bind.TreeTypeAdapter$GsonContextImpl.deserialize(TreeTypeAdapter.java:179)
	at com.stripe.model.ExpandableFieldDeserializer.deserialize(ExpandableFieldDeserializer.java:47)
	at com.stripe.model.ExpandableFieldDeserializer.deserialize(ExpandableFieldDeserializer.java:12)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:76)
	at com.stripe.net.StripeCollectionItemTypeSettingFactory1ドル.read(StripeCollectionItemTypeSettingFactory.java:25)
	at com.stripe.net.StripeResponseGetterSettingTypeAdapterFactory1ドル.read(StripeResponseGetterSettingTypeAdapterFactory.java:26)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory1ドル.readIntoField(ReflectiveTypeAdapterFactory.java:212)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.readField(ReflectiveTypeAdapterFactory.java:433)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:393)
	at com.stripe.net.StripeCollectionItemTypeSettingFactory1ドル.read(StripeCollectionItemTypeSettingFactory.java:25)
	at com.stripe.net.StripeResponseGetterSettingTypeAdapterFactory1ドル.read(StripeResponseGetterSettingTypeAdapterFactory.java:26)
	at com.google.gson.Gson.fromJson(Gson.java:1227)
	at com.google.gson.Gson.fromJson(Gson.java:1137)
	at com.google.gson.Gson.fromJson(Gson.java:1047)
	at com.google.gson.Gson.fromJson(Gson.java:982)
	at com.stripe.main.StripeClient.main(StripeClient.java:37)

Expected behavior

the json should be able to generate subscription model class again

Code snippets

//Subscription Id used below has default_source not null and has value
String json = ApiResource.GSON.toJson(Subscription.retrieve("sub_1QL3OEFMxpe1bhsdExkQGaSA"));
System.out.println(json);
// This line breaks if the subscription has default_source: example value : "default_source": {
// "id": "card_1QL3OAFMxpe1bhsdof3pn97j"
// }
Subscription subs = ApiResource.GSON.fromJson(json, Subscription.class);
System.out.println(subs);

OS

macOS

Java version

Java21

stripe-java version

v28.0.1

API version

2024年10月28日.acacia

Additional context

No response

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