Create TokenizationMethod enum

stripe/src/main/java/com/stripe/android/model/Card.kt

@@ -188,7 +188,7 @@ data class Card internal constructor(
      *
      * [API Reference](https://stripe.com/docs/api/cards/object#card_object-tokenization_method)
      */
-    internal val tokenizationMethod: String?,
+    val tokenizationMethod: TokenizationMethod? = null,
 
     /**
      * @return Set of key-value pairs that you can attach to an object. This can be useful fo
@@ -408,7 +408,7 @@ data class Card internal constructor(
         private var customerId: String? = null
         private var cvcCheck: String? = null
         private var id: String? = null
-        private var tokenizationMethod: String? = null
+        private var tokenizationMethod: TokenizationMethod? = null
         private var metadata: Map<String, String>? = null
         private var loggingTokens: List<String>? = null
 
@@ -485,7 +485,7 @@ data class Card internal constructor(
             this.id = id
         }
 
-        fun tokenizationMethod(tokenizationMethod: String?): Builder = apply {
+        fun tokenizationMethod(tokenizationMethod: TokenizationMethod?): Builder = apply {
             this.tokenizationMethod = tokenizationMethod
         }
 
@@ -528,7 +528,7 @@ data class Card internal constructor(
                 customerId = customerId.takeUnless { it.isNullOrBlank() },
                 cvcCheck = cvcCheck.takeUnless { it.isNullOrBlank() },
                 id = id.takeUnless { it.isNullOrBlank() },
-                tokenizationMethod = tokenizationMethod.takeUnless { it.isNullOrBlank() },
+                tokenizationMethod = tokenizationMethod,
                 metadata = metadata,
                 loggingTokens = loggingTokens.orEmpty().toMutableList()
             )

stripe/src/main/java/com/stripe/android/model/CustomerSource.kt

@@ -19,8 +19,10 @@ data class CustomerSource internal constructor(
             val paymentAsCard = asCard()
             return if (paymentAsSource != null && Source.SourceType.CARD == paymentAsSource.type) {
                 val cardData = paymentAsSource.sourceTypeModel as SourceCardData?
-                cardData?.tokenizationMethod
-            } else paymentAsCard?.tokenizationMethod
+                cardData?.tokenizationMethod?.code
+            } else {
+                paymentAsCard?.tokenizationMethod?.code
+            }
         }
 
     val sourceType: String

stripe/src/main/java/com/stripe/android/model/SourceCardData.kt

@@ -28,7 +28,7 @@ data class SourceCardData internal constructor(
     @get:ThreeDSecureStatus
     val threeDSecureStatus: String?,
 
-    val tokenizationMethod: String?
+    val tokenizationMethod: TokenizationMethod? = null
 ) : StripeSourceTypeModel() {
     @Retention(AnnotationRetention.SOURCE)
     @StringDef(ThreeDSecureStatus.REQUIRED, ThreeDSecureStatus.OPTIONAL,

stripe/src/main/java/com/stripe/android/model/TokenizationMethod.kt

@@ -0,0 +1,17 @@
+package com.stripe.android.model
+
+/**
+ * If a card number is tokenized, this is the method that was used. Can be apple_pay or google_pay.
+ */
+enum class TokenizationMethod(val code: String) {
+    ApplePay("apple_pay"),
+    GooglePay("google_pay");
+
+    internal companion object {
+        internal fun fromCode(code: String?): TokenizationMethod? {
+            return values().firstOrNull {
+                it.code == code
+            }
+        }
+    }
+}

stripe/src/main/java/com/stripe/android/model/parsers/CardJsonParser.kt

@@ -4,6 +4,7 @@ import com.stripe.android.model.Card
 import com.stripe.android.model.Card.FundingType
 import com.stripe.android.model.CardBrand
 import com.stripe.android.model.StripeJsonUtils
+import com.stripe.android.model.TokenizationMethod
 import org.json.JSONObject
 
 internal class CardJsonParser : ModelJsonParser<Card> {
@@ -40,7 +41,11 @@ internal class CardJsonParser : ModelJsonParser<Card> {
             .id(StripeJsonUtils.optString(json, FIELD_ID))
             .last4(StripeJsonUtils.optString(json, FIELD_LAST4))
             .name(StripeJsonUtils.optString(json, FIELD_NAME))
-            .tokenizationMethod(StripeJsonUtils.optString(json, FIELD_TOKENIZATION_METHOD))
+            .tokenizationMethod(
+                TokenizationMethod.fromCode(
+                    StripeJsonUtils.optString(json, FIELD_TOKENIZATION_METHOD)
+                )
+            )
             .metadata(StripeJsonUtils.optHash(json, FIELD_METADATA))
             .build()
     }

stripe/src/main/java/com/stripe/android/model/parsers/SourceCardDataJsonParser.kt

@@ -5,6 +5,7 @@ import com.stripe.android.model.Card
 import com.stripe.android.model.CardBrand
 import com.stripe.android.model.SourceCardData
 import com.stripe.android.model.StripeJsonUtils
+import com.stripe.android.model.TokenizationMethod
 import java.util.Locale
 import org.json.JSONObject
 
@@ -24,7 +25,9 @@ internal class SourceCardDataJsonParser : ModelJsonParser<SourceCardData> {
             threeDSecureStatus = asThreeDSecureStatus(
                 StripeJsonUtils.optString(json, FIELD_THREE_D_SECURE)
             ),
-            tokenizationMethod = StripeJsonUtils.optString(json, FIELD_TOKENIZATION_METHOD)
+            tokenizationMethod = TokenizationMethod.fromCode(
+                StripeJsonUtils.optString(json, FIELD_TOKENIZATION_METHOD)
+            )
         )
     }
 

stripe/src/test/java/com/stripe/android/model/CardFixtures.kt

@@ -93,4 +93,37 @@ object CardFixtures {
         }
         """.trimIndent()
     )))
+
+    internal val CARD_GOOGLE_PAY = requireNotNull(CardJsonParser().parse(JSONObject(
+        """
+        {
+            "id": "card_189fi32eZvKYlo2CHK8NPRME",
+            "object": "card",
+            "address_city": "Des Moines",
+            "address_country": "US",
+            "address_line1": "123 Any Street",
+            "address_line1_check": "unavailable",
+            "address_line2": "456",
+            "address_state": "IA",
+            "address_zip": "50305",
+            "address_zip_check": "unavailable",
+            "brand": "Visa",
+            "country": "US",
+            "currency": "usd",
+            "customer": "customer77",
+            "cvc_check": "unavailable",
+            "exp_month": 8,
+            "exp_year": 2017,
+            "funding": "credit",
+            "fingerprint": "abc123",
+            "last4": "4242",
+            "name": "John Cardholder",
+            "tokenization_method": "google_pay",
+            "metadata": {
+                "color": "blue",
+                "animal": "dog"
+            }
+        }
+        """.trimIndent()
+    )))
 }

stripe/src/test/java/com/stripe/android/model/parsers/CardJsonParserTest.kt

@@ -0,0 +1,16 @@
+package com.stripe.android.model.parsers
+
+import com.stripe.android.model.CardFixtures
+import com.stripe.android.model.TokenizationMethod
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class CardJsonParserTest {
+    @Test
+    fun parseGooglePayCard() {
+        assertEquals(
+            TokenizationMethod.GooglePay,
+            CardFixtures.CARD_GOOGLE_PAY.tokenizationMethod
+        )
+    }
+}

stripe/src/test/java/com/stripe/android/model/parsers/SourceCardDataJsonParserTest.kt

@@ -4,6 +4,7 @@ import com.stripe.android.model.Card
 import com.stripe.android.model.CardBrand
 import com.stripe.android.model.SourceCardData
 import com.stripe.android.model.SourceFixtures
+import com.stripe.android.model.TokenizationMethod
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertNotNull
@@ -36,7 +37,7 @@ class SourceCardDataJsonParserTest {
         assertEquals(2050, CARD_DATA.expiryYear)
         assertEquals("US", CARD_DATA.country)
         assertEquals("optional", CARD_DATA.threeDSecureStatus)
-        assertEquals("apple_pay", CARD_DATA.tokenizationMethod)
+        assertEquals(TokenizationMethod.ApplePay, CARD_DATA.tokenizationMethod)
     }
 
     @Test