Merge pull request #22 from k163377/add_dummy_constructor

Add dummy constructor.

Author: k163377

README.ja.md

@@ -126,6 +126,12 @@ data class Dst(...)
 val mapper: KRowMapper<Dst> = KRowMapper(Dst::class)
 ```
 
+ダミーコンストラクタを用いることで以下のようにも書けます。
+
+```kotlin
+val mapper: KRowMapper<Dst> = KRowMapper<Dst>()
+```
+
 #### KConstructorアノテーションによる呼び出し対象指定
 `KClass`から初期化を行う場合、`KConstructor`アノテーションを用いて呼び出し対象の関数を指定することができます。  
 

README.md

@@ -131,6 +131,13 @@ data class Dst(...)
 val mapper: KRowMapper<Dst> = KRowMapper(Dst::class)
 ```
 
+
+You can also write the following using a `dummy constructor`.
+
+```kotlin
+val mapper: KRowMapper<Dst> = KRowMapper<Dst>()
+```
+
 #### Specifying the target of a call by KConstructor annotation
 When you initialize from the `KClass`, you can use the `KConstructor` annotation and to specify the function to be called. 
 

src/main/kotlin/com/mapk/krowmapper/DummyConstructor.kt

@@ -0,0 +1,8 @@
+package com.mapk.krowmapper
+
+import com.mapk.krowmapper.KRowMapper as Mapper
+
+@Suppress("FunctionName")
+inline fun <reified T : Any> KRowMapper(
+    noinline parameterNameConverter: ((String) -> String)? = null
+) = Mapper(T::class, parameterNameConverter)

src/test/kotlin/com/mapk/krowmapper/DefaultValueTest.kt

@@ -22,7 +22,7 @@ class DefaultValueTest {
         every { resultSet.getObject("foo_id", any<Class<*>>()) } returns 1
         every { resultSet.getObject("bar_value", any<Class<*>>()) } returns "From result set."
 
-        val result = KRowMapper(::Dst, this::camelToSnake).mapRow(resultSet, 0)
+        val result = KRowMapper(Dst::class, this::camelToSnake).mapRow(resultSet, 0)
 
         Assertions.assertEquals(1, result.fooId)
         Assertions.assertEquals("default", result.barValue)

src/test/kotlin/com/mapk/krowmapper/KParameterFlattenTest.kt

@@ -33,7 +33,7 @@ class KParameterFlattenTest {
             every { getObject("qux_qux", any<Class<*>>()) } returns LocalDateTime.MIN
         }
 
-        val result = KRowMapper(::Dst, this::camelToSnake).mapRow(resultSet, 0)
+        val result = KRowMapper<Dst>(this::camelToSnake).mapRow(resultSet, 0)
         assertEquals(expected, result)
 
         verify(exactly = 1) { resultSet.getObject("baz_baz_foo_foo", Integer::class.java) }