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package.scala
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package.scala
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/*
* Copyright 2010-2011 Benjamin Lings
*
* Licensed 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 uk.me.lings
package object scalaguice {
import com.google.inject._
import java.lang.reflect.Type
private[scalaguice] def typeOf[T](implicit m: Manifest[T]): Type = {
def toWrapper(c:Type) = c match {
case java.lang.Byte.TYPE => classOf[java.lang.Byte]
case java.lang.Short.TYPE => classOf[java.lang.Short]
case java.lang.Character.TYPE => classOf[java.lang.Character]
case java.lang.Integer.TYPE => classOf[java.lang.Integer]
case java.lang.Long.TYPE => classOf[java.lang.Long]
case java.lang.Float.TYPE => classOf[java.lang.Float]
case java.lang.Double.TYPE => classOf[java.lang.Double]
case java.lang.Boolean.TYPE => classOf[java.lang.Boolean]
case java.lang.Void.TYPE => classOf[java.lang.Void]
case cls => cls
}
import com.google.inject.util.Types
m.typeArguments match {
case Nil => toWrapper(m.erasure)
case args => m.erasure match {
case c:Class[_] if c.getEnclosingClass == null => Types.newParameterizedType(c, args.map(typeOf(_)):_*)
case c:Class[_] => Types.newParameterizedTypeWithOwner(c.getEnclosingClass, c, args.map(typeOf(_)):_*)
}
}
}
/**
* Create a [[com.google.inject.TypeLiteral]] from a [[scala.Manifest]].
* Subtypes of [[scala.AnyVal]] will be converted to their corresponding
* Java wrapper classes.
*/
def typeLiteral[T : Manifest]: TypeLiteral[T] = {
TypeLiteral.get(typeOf[T]).asInstanceOf[TypeLiteral[T]]
}
import java.lang.annotation.{Annotation => JAnnotation}
type AnnotationClass[T <: JAnnotation] = Class[T]
/**
* Get the class for a Java Annotation using a [[scala.Manifest]].
*/
def annotation[T <: JAnnotation : ClassManifest]: AnnotationClass[T] = {
classManifest[T].erasure.asInstanceOf[AnnotationClass[T]]
}
}