Add unit test.

framework/src/Volo.Abp.ObjectMapping/Volo/Abp/ObjectMapping/DefaultObjectMapper.cs

@@ -142,20 +142,39 @@ public class DefaultObjectMapper : IObjectMapper, ITransientDependency
             cacheKey,
             _ =>
             {
-                var method = specificMapper
+                var methods = specificMapper
                     .GetType()
                     .GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
-                    .FirstOrDefault(x =>
-                        x.Name == nameof(IObjectMapper<object, object>.Map) &&
-                        x.GetParameters().Length == (destination == null ? 1 : 2)
-                    );
+                    .Where(x => x.Name == nameof(IObjectMapper<object, object>.Map))
+                    .Where(x =>
+                    {
+                        var parameters = x.GetParameters();
+                        if (destination == null && parameters.Length != 1 ||
+                            destination != null && parameters.Length != 2 ||
+                            parameters[0].ParameterType != sourceArgumentType)
+                        {
+                            return false;
+                        }
+
+                        return destination == null || parameters[1].ParameterType == destinationArgumentType;
+                    })
+                    .ToList();
+
+                if (methods.IsNullOrEmpty())
+                {
+                    throw new AbpException($"Could not find a method named '{nameof(IObjectMapper<object, object>.Map)}'" +
+                                           $" with parameters({(destination == null ? sourceArgumentType.ToString() : sourceArgumentType + "," + destinationArgumentType)})" +
+                                           $" in the type '{mapperType}'.");
+                }
 
-                if (method == null)
+                if (methods.Count > 1)
                 {
-                    throw new AbpException($"Could not find a method named '{nameof(IObjectMapper<object, object>.Map)}' with {(destination == null ? "1" : "2")} parameters in the type '{mapperType}'.");
+                    throw new AbpException($"Found more than one method named '{nameof(IObjectMapper<object, object>.Map)}'" +
+                                           $" with parameters({(destination == null ? sourceArgumentType.ToString() : sourceArgumentType + "," + destinationArgumentType)})" +
+                                           $" in the type '{mapperType}'.");
                 }
 
-                return method;
+                return methods.First();
             }
         );
 

framework/test/Volo.Abp.AutoMapper.Tests/Volo/Abp/AutoMapper/AbpAutoMapperModule_Specific_ObjectMapper_Tests.cs

@@ -130,6 +130,27 @@ public class AbpAutoMapperModule_Specific_ObjectMapper_Tests : AbpIntegratedTest
         ReferenceEquals(returnArray, destinationArray).ShouldBeFalse();
     }
 
+    [Fact]
+    public void Specific_Object_Mapper_Should_Support_Multiple_IObjectMapper_Interfaces()
+    {
+        var myEntityDto2 = _objectMapper.Map<MyEntity, MyEntityDto2>(new MyEntity { Number = 42 });
+        myEntityDto2.Number.ShouldBe(43); //MyEntityToMyEntityDto2Mapper adds 1 to number of the source.
+
+        var myEntity = _objectMapper.Map<MyEntityDto2, MyEntity>(new MyEntityDto2 { Number = 42 });
+        myEntity.Number.ShouldBe(43); //MyEntityToMyEntityDto2Mapper adds 1 to number of the source.
+
+        // IEnumerable
+        _objectMapper.Map<IEnumerable<MyEntity>, IEnumerable<MyEntityDto2>>(new List<MyEntity>()
+        {
+            new MyEntity { Number = 42 }
+        }).First().Number.ShouldBe(43); //MyEntityToMyEntityDto2Mapper adds 1 to number of the source.
+
+        _objectMapper.Map<IEnumerable<MyEntityDto2>, IEnumerable<MyEntity>>(new List<MyEntityDto2>()
+        {
+            new MyEntityDto2 { Number = 42 }
+        }).First().Number.ShouldBe(43); //MyEntityToMyEntityDto2Mapper adds 1 to number of the source.
+    }
+
     [Fact]
     public void Should_Use_Destination_Object_Constructor_If_Available()
     {

framework/test/Volo.Abp.AutoMapper.Tests/Volo/Abp/AutoMapper/SampleClasses/MyEntityToMyEntityDto2Mapper.cs

@@ -3,7 +3,7 @@ using Volo.Abp.ObjectMapping;
 
 namespace Volo.Abp.AutoMapper.SampleClasses;
 
-public class MyEntityToMyEntityDto2Mapper : IObjectMapper<MyEntity, MyEntityDto2>, ITransientDependency
+public class MyEntityToMyEntityDto2Mapper : IObjectMapper<MyEntity, MyEntityDto2>, IObjectMapper<MyEntityDto2, MyEntity>, ITransientDependency
 {
     public MyEntityDto2 Map(MyEntity source)
     {
@@ -20,4 +20,20 @@ public class MyEntityToMyEntityDto2Mapper : IObjectMapper<MyEntity, MyEntityDto2
         destination.Number = source.Number + 1;
         return destination;
     }
+
+    public MyEntity Map(MyEntityDto2 source)
+    {
+        return new MyEntity
+        {
+            Id = source.Id,
+            Number = source.Number + 1
+        };
+    }
+
+    public MyEntity Map(MyEntityDto2 source, MyEntity destination)
+    {
+        destination.Id = source.Id;
+        destination.Number = source.Number + 1;
+        return destination;
+    }
 }