FINERACT-2057: JSON deserialization backward compatibility
diff --git a/fineract-provider/src/main/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelper.java b/fineract-provider/src/main/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelper.java
index 6225d7f..92b2822 100644
--- a/fineract-provider/src/main/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelper.java
+++ b/fineract-provider/src/main/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelper.java
@@ -21,6 +21,7 @@
 import static org.apache.fineract.batch.command.CommandStrategyUtils.isRelativeUrlVersioned;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.json.JsonReadFeature;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -54,6 +55,7 @@
 import org.apache.fineract.portfolio.loanaccount.domain.Loan;
 import org.apache.fineract.portfolio.loanaccount.domain.LoanRepository;
 import org.apache.fineract.portfolio.loanaccount.rescheduleloan.domain.LoanRescheduleRequestRepository;
+import org.springframework.beans.factory.InitializingBean;
 import org.springframework.context.annotation.Conditional;
 import org.springframework.http.HttpMethod;
 import org.springframework.stereotype.Component;
@@ -61,7 +63,7 @@
 @RequiredArgsConstructor
 @Component
 @Conditional(LoanCOBEnabledCondition.class)
-public class LoanCOBFilterHelper {
+public class LoanCOBFilterHelper implements InitializingBean {
 
     private final GLIMAccountInfoRepository glimAccountInfoRepository;
     private final LoanAccountLockService loanAccountLockService;
@@ -72,7 +74,7 @@
     private final RetrieveLoanIdService retrieveLoanIdService;
 
     private final LoanRescheduleRequestRepository loanRescheduleRequestRepository;
-    private final ObjectMapper objectMapper;
+    private final ObjectMapper objectMapper = new ObjectMapper();
 
     private static final List<HttpMethod> HTTP_METHODS = List.of(HttpMethod.POST, HttpMethod.PUT, HttpMethod.DELETE);
 
@@ -259,4 +261,10 @@
     public void executeInlineCob(List<Long> loanIds) {
         inlineLoanCOBExecutorService.execute(loanIds, JOB_NAME);
     }
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        objectMapper.configure(JsonReadFeature.ALLOW_UNESCAPED_CONTROL_CHARS.mappedFeature(), true);
+    }
+
 }
diff --git a/fineract-provider/src/test/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelperTest.java b/fineract-provider/src/test/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelperTest.java
new file mode 100644
index 0000000..edadf4d
--- /dev/null
+++ b/fineract-provider/src/test/java/org/apache/fineract/infrastructure/jobs/filter/LoanCOBFilterHelperTest.java
@@ -0,0 +1,128 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.fineract.infrastructure.jobs.filter;
+
+import jakarta.servlet.http.HttpServletRequest;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.List;
+import org.apache.fineract.cob.loan.RetrieveLoanIdService;
+import org.apache.fineract.cob.service.InlineLoanCOBExecutorServiceImpl;
+import org.apache.fineract.cob.service.LoanAccountLockService;
+import org.apache.fineract.infrastructure.core.config.FineractProperties;
+import org.apache.fineract.infrastructure.core.http.BodyCachingHttpServletRequestWrapper;
+import org.apache.fineract.infrastructure.security.service.PlatformSecurityContext;
+import org.apache.fineract.portfolio.loanaccount.domain.GLIMAccountInfoRepository;
+import org.apache.fineract.portfolio.loanaccount.domain.LoanRepository;
+import org.apache.fineract.portfolio.loanaccount.rescheduleloan.domain.LoanRescheduleRequestRepository;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+public class LoanCOBFilterHelperTest {
+
+    @Mock
+    private GLIMAccountInfoRepository glimAccountInfoRepository;
+    @Mock
+    private LoanAccountLockService loanAccountLockService;
+    @Mock
+    private PlatformSecurityContext context;
+    @Mock
+    private InlineLoanCOBExecutorServiceImpl inlineLoanCOBExecutorService;
+    @Mock
+    private LoanRepository loanRepository;
+    @Mock
+    private FineractProperties fineractProperties;
+    @Mock
+    private RetrieveLoanIdService retrieveLoanIdService;
+
+    @Mock
+    private LoanRescheduleRequestRepository loanRescheduleRequestRepository;
+
+    @InjectMocks
+    private LoanCOBFilterHelper helper;
+
+    @BeforeEach
+    public void initLoanCOBFilterHelper() throws Exception {
+        helper.afterPropertiesSet();
+    }
+
+    @Test
+    public void testCOBFilterUnescapedChars() throws IOException {
+        String json = """
+                [
+                    {
+                        "requestId": 1,
+                        "relativeUrl": "clients",
+                        "method": "POST",
+                        "headers": [
+                            {
+                                "name": "Idempotency-Key",
+                                "value": "{{temp_idempotencyKey1}}"
+                            },
+                            {
+                                "name": "Content-Type",
+                                "value": "application/json"
+                            },
+                            {
+                                "name": "Fineract-Platform-TenantId",
+                                "value": "{{tenantId}}"
+                            },
+                            {
+                                "name": "Authorization",
+                                "value": "Basic bWlmb3M6cGFzc3dvcmQ="
+                            }
+                        ],
+                        "body":"{
+                    \\"officeId\\": 1,
+                    \\"legalFormId\\": 2,
+                    \\"isStaff\\": false,
+                    \\"active\\": true,
+                    \\"fullname\\": \\"Current Company 1\\",
+                    \\"clientNonPersonDetails\\": {
+                        \\"constitutionId\\": 1,
+                        \\"incorpValidityTillDate\\": \\"\\",
+                        \\"incorpNumber\\": \\"\\",
+                        \\"mainBusinessLineId\\": \\"\\",
+                        \\"remarks\\": \\"\\"
+                    },
+                    \\"activationDate\\": \\"01 January 2022\\",
+                    \\"familyMembers\\": [],
+                    \\"dateFormat\\": \\"dd MMMM yyyy\\",
+                    \\"locale\\": \\"en\\"
+                    }"}
+                ]
+                """;
+
+        HttpServletRequest httpServletRequest = Mockito.mock(HttpServletRequest.class);
+        Mockito.when(httpServletRequest.getPathInfo()).thenReturn("/v1/batches/endpoint");
+        BodyCachingHttpServletRequestWrapper.CachedBodyServletInputStream inputStream = new BodyCachingHttpServletRequestWrapper.CachedBodyServletInputStream(
+                json.getBytes(Charset.forName("UTF-8")));
+        Mockito.when(httpServletRequest.getInputStream()).thenReturn(inputStream);
+        List<Long> loanIds = helper.calculateRelevantLoanIds(httpServletRequest);
+        Assertions.assertEquals(0, loanIds.size());
+    }
+
+}