refactor: use Fingerprint type instead of plain String

src/main/kotlin/dev/dnpm/etl/processor/config/AppConfiguration.kt

@@ -44,6 +44,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
 import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
+import org.springframework.data.jdbc.repository.config.AbstractJdbcConfiguration
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory
 import org.springframework.retry.RetryCallback
 import org.springframework.retry.RetryContext
@@ -274,5 +275,9 @@ class AppConfiguration {
         return GPasConnectionCheckService(restTemplate, gPasConfigProperties, connectionCheckUpdateProducer)
     }
 
+    @Bean
+    fun jdbcConfiguration(): AbstractJdbcConfiguration {
+        return AppJdbcConfiguration()
+    }
 }
 

src/main/kotlin/dev/dnpm/etl/processor/config/AppJdbcConfiguration.kt

@@ -0,0 +1,25 @@
+package dev.dnpm.etl.processor.config
+
+import dev.dnpm.etl.processor.Fingerprint
+import org.springframework.context.annotation.Configuration
+import org.springframework.core.convert.converter.Converter
+import org.springframework.data.jdbc.repository.config.AbstractJdbcConfiguration
+
+@Configuration
+class AppJdbcConfiguration : AbstractJdbcConfiguration() {
+    override fun userConverters(): MutableList<*> {
+        return mutableListOf(StringToFingerprintConverter(), FingerprintToStringConverter())
+    }
+}
+
+class StringToFingerprintConverter : Converter<String, Fingerprint> {
+    override fun convert(source: String): Fingerprint {
+        return Fingerprint(source)
+    }
+}
+
+class FingerprintToStringConverter : Converter<Fingerprint, String> {
+    override fun convert(source: Fingerprint): String {
+        return source.value
+    }
+}

src/main/kotlin/dev/dnpm/etl/processor/monitoring/Request.kt

@@ -19,10 +19,12 @@
 
 package dev.dnpm.etl.processor.monitoring
 
+import dev.dnpm.etl.processor.Fingerprint
 import org.springframework.data.annotation.Id
 import org.springframework.data.domain.Page
 import org.springframework.data.domain.Pageable
 import org.springframework.data.jdbc.repository.query.Query
+import org.springframework.data.relational.core.mapping.Column
 import org.springframework.data.relational.core.mapping.Embedded
 import org.springframework.data.relational.core.mapping.Table
 import org.springframework.data.repository.CrudRepository
@@ -38,7 +40,8 @@ data class Request(
     val uuid: String = RequestId.randomUUID().toString(),
     val patientId: String,
     val pid: String,
-    val fingerprint: String,
+    @Column("fingerprint")
+    val fingerprint: Fingerprint,
     val type: RequestType,
     var status: RequestStatus,
     var processedAt: Instant = Instant.now(),
@@ -48,7 +51,7 @@ data class Request(
         uuid: String,
         patientId: String,
         pid: String,
-        fingerprint: String,
+        fingerprint: Fingerprint,
         type: RequestType,
         status: RequestStatus
     ) :
@@ -58,7 +61,7 @@ data class Request(
         uuid: String,
         patientId: String,
         pid: String,
-        fingerprint: String,
+        fingerprint: Fingerprint,
         type: RequestType,
         status: RequestStatus,
         processedAt: Instant

src/main/kotlin/dev/dnpm/etl/processor/services/RequestProcessor.kt

@@ -21,6 +21,7 @@ package dev.dnpm.etl.processor.services
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import de.ukw.ccc.bwhc.dto.MtbFile
+import dev.dnpm.etl.processor.Fingerprint
 import dev.dnpm.etl.processor.config.AppConfigProperties
 import dev.dnpm.etl.processor.monitoring.Report
 import dev.dnpm.etl.processor.monitoring.Request
@@ -146,7 +147,7 @@ class RequestProcessor(
                     uuid = requestId,
                     patientId = "???",
                     pid = patientId,
-                    fingerprint = "",
+                    fingerprint = Fingerprint.empty(),
                     status = RequestStatus.ERROR,
                     type = RequestType.DELETE,
                     report = Report("Fehler bei der Pseudonymisierung")
@@ -155,14 +156,16 @@ class RequestProcessor(
         }
     }
 
-    private fun fingerprint(mtbFile: MtbFile): String {
+    private fun fingerprint(mtbFile: MtbFile): Fingerprint {
         return fingerprint(objectMapper.writeValueAsString(mtbFile))
     }
 
-    private fun fingerprint(s: String): String {
-        return Base32().encodeAsString(DigestUtils.sha256(s))
-            .replace("=", "")
-            .lowercase()
+    private fun fingerprint(s: String): Fingerprint {
+        return Fingerprint(
+            Base32().encodeAsString(DigestUtils.sha256(s))
+                .replace("=", "")
+                .lowercase()
+        )
     }
 
 }

src/main/kotlin/dev/dnpm/etl/processor/types.kt

@@ -0,0 +1,11 @@
+package dev.dnpm.etl.processor
+
+class Fingerprint(val value: String) {
+    override fun hashCode() = value.hashCode()
+
+    override fun equals(other: Any?) = other is Fingerprint && other.value == value
+
+    companion object {
+        fun empty() = Fingerprint("")
+    }
+}