Daily scala

In order to simplify integration with existing libraries, most commonly Java libraries, Scala-IO provides a JavaConverters object with implicit methods that add as*** methods (asInput, asOutput, asSeekable, etc...) to several types of objects. It is the same pattern as in the scala.collection.JavaConverters object.

These methods can be used instead of the Resource.from*** methods to provide a slightly nicer appearing code.

There is one warning. When using JavaConverters, instead of Resource.from*** for creating Input/Output/Seekable/etc... objects, the chances of falling into the trap of creating non-reusable resources or causing a resource leak is increased. See: scala-io-core-reusable-resources for more details on this.

At the same level of abstraction as Input and Output is the fine trait called Seekable. As the name implies it provides random access style methods for interacting with a resource. The example that comes immediately to mind is a random access file.

The design of Seekable largely mimics the scala.collection.Seq patch and insert methods. Not much more to say beyond getting into some examples:
IMPORTANT: Each time truncate() or patch or insert is called a new connection to the file is opened and closed. The Processor API is to be used to perform multiple operations within one connection.