diff --git a/.gitignore b/.gitignore
index 3d70538..66fb1f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,80 +1,7 @@
-# Created by .ignore support plugin (hsz.mobi)
-### Gradle template
 .gradle
 /build/
-
-# Ignore Gradle GUI config
-gradle-app.setting
-
-# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
 !gradle-wrapper.jar
-
-# Cache of project
-.gradletasknamecache
-
-# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
-# gradle/wrapper/gradle-wrapper.properties
-### Kotlin template
-# Compiled class file
-
-# Log file
-*.log
-
-# BlueJ files
-*.ctxt
-
-# Mobile Tools for Java (J2ME)
-.mtj.tmp/
-
-# Package Files #
 *.jar
-*.war
-*.nar
-*.ear
-*.zip
-*.tar.gz
-*.rar
-
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
-### JetBrains template
 .idea
-
-# Gradle and Maven with auto-import
-# When using Gradle or Maven with auto-import, you should exclude module files,
-# since they will be recreated, and may cause churn.  Uncomment if using
-# auto-import.
-# .idea/modules.xml
-# .idea/*.iml
-# .idea/modules
-
-# CMake
-cmake-build-*/
-
-# Mongo Explorer plugin
-.idea/**/mongoSettings.xml
-
-# File-based project format
-*.iws
-
-# IntelliJ
 out/
-
-# mpeltonen/sbt-idea plugin
-.idea_modules/
-
-# JIRA plugin
-atlassian-ide-plugin.xml
-
-# Cursive Clojure plugin
-.idea/replstate.xml
-
-# Crashlytics plugin (for Android Studio and IntelliJ)
-com_crashlytics_export_strings.xml
-crashlytics.properties
-crashlytics-build.properties
-fabric.properties
-
-# Editor-based Rest Client
-.idea/httpRequests
-
+*.iml
diff --git a/.travis.yml b/.travis.yml
index 94203b7..ae3232d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ sudo: true
 before_install:
 # 赋予执行权限
 - chmod a+x gradlew
+- chmod a+x deploy.sh
 
 script:
 # 清理、生成、测试、文档
@@ -32,7 +33,7 @@ deploy:
     tags:       true
 
 - provider: script
-  script: ./gradlew clean build dokka bintrayUpload -PbintrayUser $bintrayUser -PbintrayKey $bintrayKey -PdryRun=false
+  script: bash ./deploy.sh
   on:
     tags: true
 
diff --git a/deploy.sh b/deploy.sh
new file mode 100644
index 0000000..f68479e
--- /dev/null
+++ b/deploy.sh
@@ -0,0 +1 @@
+./gradlew clean build dokka bintrayUpload -PbintrayUser $bintrayUser -PbintrayKey $bintrayKey -PdryRun=false
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
deleted file mode 100644
index 29e08e8..0000000
--- a/gradle.properties
+++ /dev/null
@@ -1 +0,0 @@
-kotlin.code.style=official
\ No newline at end of file
diff --git a/src/main/kotlin/org/mechdancer/dependency/ComponentNotExistException.kt b/src/main/kotlin/org/mechdancer/dependency/ComponentNotExistException.kt
index c239557..8cb2061 100644
--- a/src/main/kotlin/org/mechdancer/dependency/ComponentNotExistException.kt
+++ b/src/main/kotlin/org/mechdancer/dependency/ComponentNotExistException.kt
@@ -7,4 +7,4 @@ import kotlin.reflect.KClass
  * @param which 要找的组件类型
  */
 class ComponentNotExistException(which: KClass<out Component>) :
-    RuntimeException("cannot find this org.mechdancer.dependency: ${which.qualifiedName}")
\ No newline at end of file
+    RuntimeException("Cannot find this component: ${which.qualifiedName}")
\ No newline at end of file
diff --git a/src/main/kotlin/org/mechdancer/dependency/unique/UniqueComponent.kt b/src/main/kotlin/org/mechdancer/dependency/unique/UniqueComponent.kt
index eabc5e6..0c2608d 100644
--- a/src/main/kotlin/org/mechdancer/dependency/unique/UniqueComponent.kt
+++ b/src/main/kotlin/org/mechdancer/dependency/unique/UniqueComponent.kt
@@ -1,6 +1,7 @@
 package org.mechdancer.dependency.unique
 
 import org.mechdancer.dependency.Component
+import java.lang.reflect.ParameterizedType
 import kotlin.reflect.KClass
 import kotlin.reflect.full.safeCast
 
@@ -11,7 +12,14 @@ import kotlin.reflect.full.safeCast
  *   泛型 [T] 可保证此类型来自这个实现类
  */
 abstract class UniqueComponent<T : UniqueComponent<T>>
-    (private val type: KClass<T>) : Component {
+    (type: KClass<T>? = null) : Component {
+
+    private val type = type ?: (javaClass.genericSuperclass as? ParameterizedType)
+        ?.let { type ->
+            type.actualTypeArguments
+                .find { t -> t is Class<*> && UniqueComponent::class.java.isAssignableFrom(t) }
+                ?.let { it as Class<*> }
+        }?.kotlin ?: throw RuntimeException("Unable to find component type.")
 
     override fun equals(other: Any?) =
         this === other || type.safeCast(other) !== null