diff --git a/.mvn/maven.config b/.mvn/maven.config
deleted file mode 100644
index aa764e4..0000000
--- a/.mvn/maven.config
+++ /dev/null
@@ -1,2 +0,0 @@
-revision=1.0.0
-changelist=-SNAPSHOT
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 361648e..1b5fc20 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,33 +6,15 @@
 
   <groupId>io.github.ngocnhan-tran1996</groupId>
   <artifactId>spring-jdbc-oracle</artifactId>
-  <version>${revision}{changelist}</version>
-  <name>Spring Jdbc Oracle</name>
-
-  <properties>
-    <maven.compiler.source>21</maven.compiler.source>
-    <maven.compiler.target>21</maven.compiler.target>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-
-    <spring-jdbc.version>6.1.11</spring-jdbc.version>
-    <oracle.jdbc.version>23.4.0.24.05</oracle.jdbc.version>
-  </properties>
+  <version>1.0.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
 
-  <dependencies>
-    <dependency>
-      <groupId>org.springframework</groupId>
-      <artifactId>spring-jdbc</artifactId>
-      <version>${spring-jdbc.version}</version>
-      <scope>provided</scope>
-    </dependency>
+  <name>Spring Jdbc Oracle</name>
 
-    <dependency>
-      <groupId>com.oracle.database.jdbc</groupId>
-      <artifactId>ojdbc11</artifactId>
-      <version>${oracle.jdbc.version}</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
+  <modules>
+    <module>spring-jdbc-oracle-core</module>
+    <module>spring-jdbc-oracle-test</module>
+  </modules>
 
   <distributionManagement>
     <site>
@@ -41,33 +23,4 @@
     </site>
   </distributionManagement>
 
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.jacoco</groupId>
-        <artifactId>jacoco-maven-plugin</artifactId>
-        <version>0.8.12</version>
-        <executions>
-          <execution>
-            <goals>
-              <goal>prepare-agent</goal>
-            </goals>
-          </execution>
-          <execution>
-            <id>report</id>
-            <phase>prepare-package</phase>
-            <goals>
-              <goal>report</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-site-plugin</artifactId>
-        <version>3.12.1</version>
-      </plugin>
-    </plugins>
-  </build>
 </project>
\ No newline at end of file
diff --git a/spring-jdbc-oracle-core/pom.xml b/spring-jdbc-oracle-core/pom.xml
new file mode 100644
index 0000000..3dcf654
--- /dev/null
+++ b/spring-jdbc-oracle-core/pom.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>io.github.ngocnhan-tran1996</groupId>
+    <artifactId>spring-jdbc-oracle</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>spring-jdbc-oracle-core</artifactId>
+
+  <properties>
+    <maven.compiler.source>22</maven.compiler.source>
+    <maven.compiler.target>22</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
+    <spring-jdbc.version>6.1.11</spring-jdbc.version>
+    <oracle.jdbc.version>23.4.0.24.05</oracle.jdbc.version>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-jdbc</artifactId>
+      <version>${spring-jdbc.version}</version>
+      <scope>provided</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>com.oracle.database.jdbc</groupId>
+      <artifactId>ojdbc11</artifactId>
+      <version>${oracle.jdbc.version}</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+</project>
\ No newline at end of file
diff --git a/src/main/java/io/spring/jdbc/oracle/accessor/ClassRecord.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/accessor/ClassRecord.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/accessor/ClassRecord.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/accessor/ClassRecord.java
diff --git a/src/main/java/io/spring/jdbc/oracle/accessor/ParameterAccessor.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/accessor/ParameterAccessor.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/accessor/ParameterAccessor.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/accessor/ParameterAccessor.java
diff --git a/src/main/java/io/spring/jdbc/oracle/annotation/OracleParameter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/annotation/OracleParameter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/annotation/OracleParameter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/annotation/OracleParameter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/annotation/OracleType.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/annotation/OracleType.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/annotation/OracleType.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/annotation/OracleType.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/ConvertKey.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/ConvertKey.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/ConvertKey.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/ConvertKey.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/GenericOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/GenericOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/GenericOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/GenericOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/OracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/OracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/OracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/OracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/OracleConverters.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/OracleConverters.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/OracleConverters.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/OracleConverters.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToArrayGenericOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToArrayGenericOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToArrayGenericOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToArrayGenericOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToCollectionGenericOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToCollectionGenericOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToCollectionGenericOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/ArrayToCollectionGenericOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToArrayGenericOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToArrayGenericOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToArrayGenericOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToArrayGenericOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToCollectionGenericOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToCollectionGenericOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToCollectionGenericOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/CollectionToCollectionGenericOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/DefaultOracleConverters.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/DefaultOracleConverters.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/DefaultOracleConverters.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/DefaultOracleConverters.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/LocalDatetimeToTimestampOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/LocalDatetimeToTimestampOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/LocalDatetimeToTimestampOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/LocalDatetimeToTimestampOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/NoneOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/NoneOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/NoneOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/NoneOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/NumberToStringGenericOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/NumberToStringGenericOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/NumberToStringGenericOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/NumberToStringGenericOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/converter/support/TimestampToLocalDatetimeOracleConverter.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/TimestampToLocalDatetimeOracleConverter.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/converter/support/TimestampToLocalDatetimeOracleConverter.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/converter/support/TimestampToLocalDatetimeOracleConverter.java
diff --git a/src/main/java/io/spring/jdbc/oracle/exception/ValueException.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/exception/ValueException.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/exception/ValueException.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/exception/ValueException.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/AbstractMapper.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/AbstractMapper.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/AbstractMapper.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/AbstractMapper.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/BeanPropertyMapper.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/BeanPropertyMapper.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/BeanPropertyMapper.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/BeanPropertyMapper.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/DelegateMapper.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/DelegateMapper.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/DelegateMapper.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/DelegateMapper.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/Mapper.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/Mapper.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/Mapper.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/Mapper.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/RecordPropertyMapper.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/RecordPropertyMapper.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/RecordPropertyMapper.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/RecordPropertyMapper.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/property/MapperProperty.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/property/MapperProperty.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/property/MapperProperty.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/property/MapperProperty.java
diff --git a/src/main/java/io/spring/jdbc/oracle/mapper/property/TypeProperty.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/property/TypeProperty.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/mapper/property/TypeProperty.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/mapper/property/TypeProperty.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/input/AbstractTypeValue.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/AbstractTypeValue.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/input/AbstractTypeValue.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/AbstractTypeValue.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/input/ArrayTypeValue.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/ArrayTypeValue.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/input/ArrayTypeValue.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/ArrayTypeValue.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/input/ParameterInput.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/ParameterInput.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/input/ParameterInput.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/ParameterInput.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/input/StructArrayTypeValue.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/StructArrayTypeValue.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/input/StructArrayTypeValue.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/StructArrayTypeValue.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/input/StructTypeValue.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/StructTypeValue.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/input/StructTypeValue.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/input/StructTypeValue.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/output/AbstractReturnType.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/AbstractReturnType.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/output/AbstractReturnType.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/AbstractReturnType.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/output/ArrayReturnType.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/ArrayReturnType.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/output/ArrayReturnType.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/ArrayReturnType.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/output/ParameterOutput.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/ParameterOutput.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/output/ParameterOutput.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/ParameterOutput.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/output/StructArrayReturnType.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/StructArrayReturnType.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/output/StructArrayReturnType.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/StructArrayReturnType.java
diff --git a/src/main/java/io/spring/jdbc/oracle/parameter/output/StructReturnType.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/StructReturnType.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/parameter/output/StructReturnType.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/parameter/output/StructReturnType.java
diff --git a/src/main/java/io/spring/jdbc/oracle/utils/Mappers.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Mappers.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/utils/Mappers.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Mappers.java
diff --git a/src/main/java/io/spring/jdbc/oracle/utils/Matchers.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Matchers.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/utils/Matchers.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Matchers.java
diff --git a/src/main/java/io/spring/jdbc/oracle/utils/Strings.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Strings.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/utils/Strings.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Strings.java
diff --git a/src/main/java/io/spring/jdbc/oracle/utils/Validators.java b/spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Validators.java
similarity index 100%
rename from src/main/java/io/spring/jdbc/oracle/utils/Validators.java
rename to spring-jdbc-oracle-core/src/main/java/io/spring/jdbc/oracle/utils/Validators.java
diff --git a/spring-jdbc-oracle-test/pom.xml b/spring-jdbc-oracle-test/pom.xml
index 689bc15..8dcedc4 100644
--- a/spring-jdbc-oracle-test/pom.xml
+++ b/spring-jdbc-oracle-test/pom.xml
@@ -6,14 +6,14 @@
 
   <parent>
     <groupId>org.springframework.boot</groupId>
-    <artifactId>spring-boot-starter-parent</artifactId>
+    <artifactId>spring-boot-dependencies</artifactId>
     <version>3.3.2</version>
     <relativePath/> <!-- lookup parent from repository -->
   </parent>
 
   <groupId>io.github.ngocnhan-tran1996</groupId>
   <artifactId>spring-jdbc-oracle-test</artifactId>
-  <version>${revision}{changelist}</version>
+  <version>1.0.0-SNAPSHOT</version>
 
   <properties>
     <java.version>22</java.version>
@@ -22,7 +22,7 @@
   <dependencies>
     <dependency>
       <groupId>io.github.ngocnhan-tran1996</groupId>
-      <artifactId>spring-jdbc-oracle</artifactId>
+      <artifactId>spring-jdbc-oracle-core</artifactId>
       <version>1.0.0-SNAPSHOT</version>
     </dependency>
 
diff --git a/spring-jdbc-oracle-test/src/test/java/io/spring/jdbc/oracle/mapper/DelegateMapperTest.java b/spring-jdbc-oracle-test/src/test/java/io/spring/jdbc/oracle/mapper/DelegateMapperTest.java
index 09cbdae..9e23af5 100644
--- a/spring-jdbc-oracle-test/src/test/java/io/spring/jdbc/oracle/mapper/DelegateMapperTest.java
+++ b/spring-jdbc-oracle-test/src/test/java/io/spring/jdbc/oracle/mapper/DelegateMapperTest.java
@@ -4,6 +4,7 @@
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
 import io.spring.jdbc.oracle.annotation.OracleParameter;
+import io.spring.jdbc.oracle.annotation.OracleType;
 import io.spring.jdbc.oracle.converter.OracleConverter;
 import io.spring.jdbc.oracle.converter.support.DefaultOracleConverters;
 import io.spring.jdbc.oracle.exception.ValueException;
@@ -17,7 +18,6 @@
 import java.util.Map;
 import java.util.Optional;
 import javax.sql.DataSource;
-import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
@@ -123,6 +123,16 @@ public LocalDate convert(LocalDateTime source) {
 
     }
 
+    public record StringToTString() implements OracleConverter<String, String> {
+
+        @Override
+        public String convert(String source) {
+
+            return source;
+        }
+
+    }
+
     record Person(
         String firstName,
         String lastName,
@@ -209,9 +219,7 @@ void convert() {
                 Map.of(
                     "first_name", "hello@world",
                     "lastname", "info",
-                    "AGE", BigDecimal.TEN,
-                    "biRthDate",
-                    Timestamp.valueOf(LocalDateTime.of(LocalDate.now(), LocalTime.MIN))
+                    "AGE", BigDecimal.TEN
                 )
             );
             assertThat(output)
@@ -221,7 +229,7 @@ void convert() {
                         "hello@world",
                         "info",
                         BigDecimal.TEN,
-                        Timestamp.valueOf(LocalDateTime.of(LocalDate.now(), LocalTime.MIN))
+                        null
                     )
                 );
         }
@@ -229,13 +237,26 @@ void convert() {
         @Getter
         @Setter
         @NoArgsConstructor
-        @AllArgsConstructor
         static class Person {
 
+            @OracleParameter(
+                input = @OracleType(converter = StringToTString.class),
+                output = @OracleType(converter = StringToTString.class)
+            )
             private String firstName;
             private String lastName;
             private BigDecimal age;
             private Timestamp birthDate;
+            private String unknown;
+
+            public Person(String firstName, String lastName, BigDecimal age, Timestamp birthDate) {
+
+                this.firstName = firstName;
+                this.lastName = lastName;
+                this.age = age;
+                this.birthDate = birthDate;
+            }
+
         }
 
     }
@@ -375,6 +396,7 @@ void mock_throw_exception_if_class_has_no_same_type() throws SQLException {
 
             // arrange
             var mapper = DelegateMapper.newInstance(PersonWrongBirthDatePojo.class);
+            mapper.setConverters(null);
 
             // assert
             var output = mapper.toStruct(
@@ -390,17 +412,20 @@ void mock_throw_exception_if_class_has_no_same_type() throws SQLException {
         @Setter
         static class PersonSetterPojo {
 
-            private String firstName;
+            String firstName;
+
             @OracleParameter("firstName")
-            private String lastName;
+            String lastName;
+
         }
 
         @Getter
         static class PersonGetterPojo {
 
-            private String firstName;
+            private final String firstName = "X";
+
             @OracleParameter("firstName")
-            private String lastName;
+            private final String lastName = "X";
         }
 
         @Getter