testgen.IO.scala Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2011 Kazuhiro Sera.
 *
 * 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 testgen

object IO {

  /**
   * Loan Pattern (invoke close method safely)
   */
  def using[Closable <: { def close(): Unit }, Result](closable: Closable)(function: Closable => Result): Result = {
    try {
      function(closable)
    } finally {
      closable match {
        case null =>
        case _ => try {
          closable.close()
        } catch {
          case _ =>
        }
      }
    }
  }

}