Fix import parameters

src/main/java/org/gridsuite/study/server/dto/RootNetworkInfos.java

@@ -9,6 +9,8 @@
 import java.util.Map;
 import java.util.UUID;
 
+import static org.gridsuite.study.server.utils.JsonUtils.serializeImportParameters;
+
 @Builder
 @Getter
 @Setter
@@ -28,7 +30,7 @@ public class RootNetworkInfos {
     // reportUuid of network import, root node one
     private UUID reportUuid;
 
-    private Map<String, String> importParameters;
+    private Map<String, Object> importParameters;
 
     private Map<String, Object> importParametersRaw;
 
@@ -46,7 +48,7 @@ public RootNetworkEntity toEntity() {
                 .caseName(caseInfos.getCaseName())
                 .caseFormat(caseInfos.getCaseFormat())
                 .reportUuid(reportUuid)
-                .importParameters(importParameters)
+                .importParameters(serializeImportParameters(importParameters))
                 .tag(tag);
 
         if (rootNetworkNodeInfos != null) {

src/main/java/org/gridsuite/study/server/error/StudyBusinessErrorCode.java

@@ -30,7 +30,8 @@ public enum StudyBusinessErrorCode implements BusinessErrorCode {
     NETWORK_EXPORT_FAILED("study.networkExportFailed"),
     TOO_MANY_NAD_CONFIGS("study.tooManyNadConfigs"),
     TOO_MANY_MAP_CARDS("study.tooManyMapCards"),
-    ELEMENT_ALREADY_EXISTS("study.elementAlreadyExists");
+    ELEMENT_ALREADY_EXISTS("study.elementAlreadyExists"),
+    UNPROCESSABLE_IMPORT_PARAMETER("study.unprocessableImportParameter");
 
     private final String value;
 

src/main/java/org/gridsuite/study/server/repository/rootnetwork/RootNetworkEntity.java

@@ -12,12 +12,11 @@
 import org.gridsuite.study.server.networkmodificationtree.entities.RootNetworkNodeInfoEntity;
 import org.gridsuite.study.server.repository.StudyEntity;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
 import java.util.stream.Collectors;
 
+import static org.gridsuite.study.server.utils.JsonUtils.deserializeImportParameters;
+
 /**
  * @author Le Saulnier Kevin <lesaulnier.kevin at rte-france.com>
  */
@@ -93,7 +92,7 @@ public RootNetworkInfos toDto() {
         rootNetworkInfosBuilder.id(this.id)
             .name(this.name)
             .networkInfos(new NetworkInfos(this.networkUuid, this.networkId))
-            .importParameters(this.importParameters)
+            .importParameters(deserializeImportParameters(this.importParameters))
             .caseInfos(new CaseInfos(this.caseUuid, this.originalCaseUuid, this.caseName, this.caseFormat))
             .reportUuid(this.reportUuid)
             .tag(tag)

src/main/java/org/gridsuite/study/server/service/ConsumerService.java

@@ -222,11 +222,6 @@ public Consumer<Message<String>> consumeCaseImportSucceeded() {
             String caseFormat = message.getHeaders().get(HEADER_CASE_FORMAT, String.class);
             String caseName = message.getHeaders().get(HEADER_CASE_NAME, String.class);
             Map<String, Object> rawParameters = message.getHeaders().get(HEADER_IMPORT_PARAMETERS, Map.class);
-            // String longer than 1024 bytes are converted to com.rabbitmq.client.LongString (https://docs.spring.io/spring-amqp/docs/3.0.0/reference/html/#message-properties-converters)
-            Map<String, String> importParameters = new HashMap<>();
-            if (rawParameters != null) {
-                rawParameters.forEach((key, value) -> importParameters.put(key, value.toString()));
-            }
 
             if (receiverString != null) {
                 CaseImportReceiver receiver;
@@ -237,12 +232,12 @@ public Consumer<Message<String>> consumeCaseImportSucceeded() {
                     return;
                 }
 
-                handleConsumeCaseImportSucceeded(receiver, networkUuid, networkId, caseName, caseFormat, importParameters);
+                handleConsumeCaseImportSucceeded(receiver, networkUuid, networkId, caseName, caseFormat, rawParameters);
             }
         };
     }
 
-    private void handleConsumeCaseImportSucceeded(CaseImportReceiver receiver, UUID networkUuid, String networkId, String caseName, String caseFormat, Map<String, String> importParameters) {
+    private void handleConsumeCaseImportSucceeded(CaseImportReceiver receiver, UUID networkUuid, String networkId, String caseName, String caseFormat, Map<String, Object> importParameters) {
         UUID caseUuid = receiver.getCaseUuid();
         UUID studyUuid = receiver.getStudyUuid();
         String userId = receiver.getUserId();
@@ -291,7 +286,7 @@ private void handleConsumeCaseImportSucceeded(CaseImportReceiver receiver, UUID
     }
 
     private void insertStudy(UUID studyUuid, String userId, NetworkInfos networkInfos, CaseInfos caseInfos,
-                             Map<String, String> importParameters, UUID importReportUuid) {
+                             Map<String, Object> importParameters, UUID importReportUuid) {
         UserProfileInfos userProfileInfos = studyService.getUserProfile(userId);
 
         UUID loadFlowParametersUuid = createDefaultLoadFlowParameters(userId, userProfileInfos);

src/main/java/org/gridsuite/study/server/service/NetworkModificationService.java

@@ -149,7 +149,7 @@ public NetworkModificationsResult createModification(UUID groupUuid,
         HttpHeaders headers = new HttpHeaders();
         headers.setContentType(MediaType.APPLICATION_JSON);
 
-        HttpEntity<String> httpEntity = new HttpEntity<>(getModificationContextJsonString(objectMapper, modificationContextInfos), headers);
+        HttpEntity<String> httpEntity = new HttpEntity<>(getModificationContextJsonString(modificationContextInfos), headers);
         return restTemplate.exchange(path, HttpMethod.POST, httpEntity, NetworkModificationsResult.class).getBody();
     }
 

src/main/java/org/gridsuite/study/server/service/RootNetworkService.java

@@ -21,6 +21,7 @@
 import org.gridsuite.study.server.repository.rootnetwork.RootNetworkRequestRepository;
 import org.gridsuite.study.server.repository.rootnetwork.RootNetworkEntity;
 import org.gridsuite.study.server.repository.rootnetwork.RootNetworkRepository;
+import org.gridsuite.study.server.utils.JsonUtils;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -114,7 +115,7 @@ private void updateRootNetworkInfos(RootNetworkEntity rootNetworkEntity, RootNet
 
             updateCaseInfos(rootNetworkEntity, rootNetworkInfos.getCaseInfos());
             updateNetworkInfos(rootNetworkEntity, rootNetworkInfos.getNetworkInfos());
-            rootNetworkEntity.setImportParameters(rootNetworkInfos.getImportParameters());
+            rootNetworkEntity.setImportParameters(JsonUtils.serializeImportParameters(rootNetworkInfos.getImportParameters()));
             rootNetworkEntity.setReportUuid(rootNetworkInfos.getReportUuid());
         }
 
@@ -164,8 +165,8 @@ public String getCaseName(UUID rootNetworkUuid) {
         return getRootNetwork(rootNetworkUuid).map(RootNetworkEntity::getCaseName).orElseThrow(() -> new StudyException(NOT_FOUND, "Root network not found"));
     }
 
-    public Map<String, String> getImportParameters(UUID rootNetworkUuid) {
-        return rootNetworkRepository.findWithImportParametersById(rootNetworkUuid).map(RootNetworkEntity::getImportParameters).orElseThrow(() -> new StudyException(NOT_FOUND, "Root network not found"));
+    public Map<String, Object> getImportParameters(UUID rootNetworkUuid) {
+        return rootNetworkRepository.findWithImportParametersById(rootNetworkUuid).map(RootNetworkEntity::getImportParameters).map(JsonUtils::deserializeImportParameters).orElseThrow(() -> new StudyException(NOT_FOUND, "Root network not found"));
     }
 
     public List<RootNetworkInfos> getRootNetworkInfosWithLinksInfos(UUID studyUuid) {
@@ -183,7 +184,7 @@ public void duplicateStudyRootNetworks(StudyEntity newStudyEntity, StudyEntity s
                 UUID clonedNetworkUuid = networkService.getNetworkUuid(clonedNetwork);
 
                 UUID clonedCaseUuid = caseService.duplicateCase(rootNetworkEntityToDuplicate.getCaseUuid(), false);
-                Map<String, String> newImportParameters = Map.copyOf(rootNetworkEntityToDuplicate.getImportParameters());
+                Map<String, Object> newImportParameters = JsonUtils.deserializeImportParameters(rootNetworkEntityToDuplicate.getImportParameters());
 
                 UUID clonedRootNodeReportUuid = reportService.duplicateReport(rootNetworkEntityToDuplicate.getReportUuid());
 

src/main/java/org/gridsuite/study/server/service/StudyService.java

@@ -628,7 +628,7 @@ public CreatedStudyBasicInfos insertStudy(UUID studyUuid, String userId, Network
                                               UUID voltageInitParametersUuid, UUID securityAnalysisParametersUuid, UUID sensitivityAnalysisParametersUuid,
                                               UUID networkVisualizationParametersUuid, UUID dynamicSecurityAnalysisParametersUuid, UUID dynamicMarginCalculationParametersUuid,
                                               UUID stateEstimationParametersUuid, UUID pccMinParametersUuid,
-                                              UUID spreadsheetConfigCollectionUuid, UUID workspacesConfigUuid, Map<String, String> importParameters, UUID importReportUuid) {
+                                              UUID spreadsheetConfigCollectionUuid, UUID workspacesConfigUuid, Map<String, Object> importParameters, UUID importReportUuid) {
         Objects.requireNonNull(studyUuid);
         Objects.requireNonNull(userId);
         Objects.requireNonNull(networkInfos.getNetworkUuid());
@@ -1544,7 +1544,7 @@ private StudyEntity saveStudyThenCreateBasicTree(UUID studyUuid, NetworkInfos ne
                                                     UUID voltageInitParametersUuid, UUID securityAnalysisParametersUuid, UUID sensitivityAnalysisParametersUuid,
                                                     UUID networkVisualizationParametersUuid, UUID dynamicSecurityAnalysisParametersUuid, UUID dynamicMarginCalculationParametersUuid,
                                                     UUID stateEstimationParametersUuid, UUID pccMinParametersUuid,
-                                                    UUID spreadsheetConfigCollectionUuid, UUID workspacesConfigUuid, Map<String, String> importParameters, UUID importReportUuid) {
+                                                    UUID spreadsheetConfigCollectionUuid, UUID workspacesConfigUuid, Map<String, Object> importParameters, UUID importReportUuid) {
 
         StudyEntity studyEntity = StudyEntity.builder()
                 .id(studyUuid)

src/main/java/org/gridsuite/study/server/utils/JsonUtils.java

@@ -14,12 +14,19 @@
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import lombok.NonNull;
 import org.gridsuite.study.server.dto.modification.ModificationApplicationContext;
+import org.gridsuite.study.server.error.StudyException;
 import org.springframework.data.util.Pair;
 
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.function.Predicate;
 
+import static org.gridsuite.study.server.error.StudyBusinessErrorCode.UNPROCESSABLE_IMPORT_PARAMETER;
+
 public final class JsonUtils {
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
     private JsonUtils() {
         throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
     }
@@ -55,14 +62,50 @@ public static JsonNode nodeAt(@NonNull final JsonNode node, @NonNull final JsonP
         return nodeAt(node, jsonNode -> !jsonNode.isMissingNode(), pointers);
     }
 
-    public static String getModificationContextJsonString(ObjectMapper objectMapper, Pair<String, List<ModificationApplicationContext>> modificationContextInfos) {
+    public static String getModificationContextJsonString(Pair<String, List<ModificationApplicationContext>> modificationContextInfos) {
         try {
-            ObjectNode modificationJson = (ObjectNode) objectMapper.readTree(modificationContextInfos.getFirst());
-            ObjectNode modificationContextJson = objectMapper.valueToTree(modificationContextInfos);
+            ObjectNode modificationJson = (ObjectNode) MAPPER.readTree(modificationContextInfos.getFirst());
+            ObjectNode modificationContextJson = MAPPER.valueToTree(modificationContextInfos);
             modificationContextJson.set(Pair.class.getDeclaredField("first").getName(), modificationJson);
             return modificationContextJson.toString();
         } catch (JsonProcessingException | NoSuchFieldException e) {
             throw new IllegalStateException("Impossible to parse modification context", e);
         }
     }
+
+    public static Map<String, Object> deserializeImportParameters(Map<String, String> rawParams) {
+        Map<String, Object> result = new HashMap<>();
+        if (rawParams == null) {
+            return result;
+        }
+
+        rawParams.forEach((key, value) -> {
+            if (value == null) {
+                result.put(key, null);
+                return;
+            }
+            try {
+                result.put(key, MAPPER.readValue(value, Object.class));
+            } catch (JsonProcessingException e) {
+                throw new StudyException(UNPROCESSABLE_IMPORT_PARAMETER, "Import parameter '" + key + " => " + value + "' is not valid JSON: " + e.getMessage());
+            }
+        });
+        return result;
+    }
+
+    public static Map<String, String> serializeImportParameters(Map<String, Object> params) {
+        Map<String, String> result = new HashMap<>();
+        if (params == null) {
+            return result;
+        }
+
+        params.forEach((key, value) -> {
+            try {
+                result.put(key, MAPPER.writeValueAsString(value));
+            } catch (JsonProcessingException e) {
+                throw new StudyException(UNPROCESSABLE_IMPORT_PARAMETER, "Import parameter '" + key + " => " + value + "' is not serializable: " + e.getMessage());
+            }
+        });
+        return result;
+    }
 }

src/main/resources/db/changelog/changesets/changelog_20260519T112945Z.xml

@@ -0,0 +1,11 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd">
+    <changeSet author="homereti" id="1747612800000-1">
+        <update tableName="import_parameters">
+            <column name="import_parameters" value="NULL"/>
+            <where>import_parameters=''</where>
+        </update>
+    </changeSet>
+</databaseChangeLog>

src/test/java/org/gridsuite/study/server/JsonUtilsTest.java

@@ -0,0 +1,88 @@
+/**
+ * Copyright (c) 2026, RTE (http://www.rte-france.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+package org.gridsuite.study.server;
+
+import org.gridsuite.study.server.error.StudyBusinessErrorCode;
+import org.gridsuite.study.server.error.StudyException;
+import org.gridsuite.study.server.utils.JsonUtils;
+import org.junit.jupiter.api.Test;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * @author Etienne HOMER <etiennehomer@gmail.com>
+ */
+class JsonUtilsTest {
+
+    @Test
+    void shouldSerializeImportParameters() {
+        Map<String, Object> params = new HashMap<>();
+        params.put("string", "value");
+        params.put("int", 123);
+        params.put("bool", true);
+        params.put("list", List.of("a", "b"));
+        params.put("map", Map.of("k", "v"));
+        params.put("null", null);
+
+        Map<String, String> result = JsonUtils.serializeImportParameters(params);
+
+        assertEquals("\"value\"", result.get("string"));
+        assertEquals("123", result.get("int"));
+        assertEquals("true", result.get("bool"));
+        assertEquals("[\"a\",\"b\"]", result.get("list"));
+        assertEquals("{\"k\":\"v\"}", result.get("map"));
+        assertEquals("null", result.get("null"));
+    }
+
+    @Test
+    void shouldReturnEmptyMapWhenSerializeNull() {
+        Map<String, String> result = JsonUtils.serializeImportParameters(null);
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    void shouldDeserializeImportParameters() {
+        Map<String, String> rawParams = new HashMap<>();
+        rawParams.put("string", "\"value\"");
+        rawParams.put("int", "123");
+        rawParams.put("bool", "true");
+        rawParams.put("list", "[\"a\",\"b\"]");
+        rawParams.put("map", "{\"k\":\"v\"}");
+        rawParams.put("null", "null");
+        rawParams.put("realNull", null);
+
+        Map<String, Object> result = JsonUtils.deserializeImportParameters(rawParams);
+
+        assertEquals("value", result.get("string"));
+        assertEquals(123, result.get("int"));
+        assertEquals(true, result.get("bool"));
+        assertEquals(List.of("a", "b"), result.get("list"));
+        assertEquals(Map.of("k", "v"), result.get("map"));
+        assertNull(result.get("null"));
+        assertNull(result.get("realNull"));
+    }
+
+    @Test
+    void shouldReturnEmptyMapWhenDeserializeNull() {
+        Map<String, Object> result = JsonUtils.deserializeImportParameters(null);
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    void shouldThrowExceptionWhenDeserializeInvalidJson() {
+        Map<String, String> rawParams = Map.of("invalid", "{notJson}");
+        StudyException exception = assertThrows(StudyException.class, () -> JsonUtils.deserializeImportParameters(rawParams));
+        assertEquals(StudyBusinessErrorCode.UNPROCESSABLE_IMPORT_PARAMETER, exception.getBusinessErrorCode());
+        assertTrue(exception.getMessage().contains("Import parameter 'invalid => {notJson}' is not valid JSON"));
+    }
+}