feat(client): update jackson client generation to always annotate all fields

Author: SalyczeQ

plugins/client/graphql-kotlin-client-generator/src/main/kotlin/com/expediagroup/graphql/plugin/client/generator/types/generatePropertySpecs.kt

@@ -17,10 +17,12 @@
 package com.expediagroup.graphql.plugin.client.generator.types
 
 import com.expediagroup.graphql.plugin.client.generator.GraphQLClientGeneratorContext
+import com.expediagroup.graphql.plugin.client.generator.GraphQLSerializer
 import com.expediagroup.graphql.plugin.client.generator.ScalarConverterInfo
 import com.expediagroup.graphql.plugin.client.generator.exceptions.DeprecatedFieldsSelectedException
 import com.expediagroup.graphql.plugin.client.generator.exceptions.InvalidSelectionSetException
 import com.expediagroup.graphql.plugin.client.generator.exceptions.MissingArgumentException
+import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import com.fasterxml.jackson.databind.annotation.JsonSerialize
 import com.squareup.kotlinpoet.AnnotationSpec
@@ -96,6 +98,16 @@ internal fun generatePropertySpecs(
         fieldDefinition.description?.content?.let { kdoc ->
             propertySpecBuilder.addKdoc("%L", kdoc)
         }
+        if (context.serializer == GraphQLSerializer.JACKSON) {
+            // always add @get:JsonProperty annotation as a workaround to Jackson limitations
+            // related to JavaBean naming conventions
+            propertySpecBuilder.addAnnotation(
+                AnnotationSpec.builder(JsonProperty::class)
+                    .useSiteTarget(AnnotationSpec.UseSiteTarget.GET)
+                    .addMember("value = \"$fieldName\"")
+                    .build()
+            )
+        }
         propertySpecBuilder.build()
     }