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https://github.com/jozic/scalaj
scala/java interoperability, as deep as you want
https://github.com/jozic/scalaj
java nested-collections primitives scala scalaj-converters
Last synced: 25 days ago
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scala/java interoperability, as deep as you want
- Host: GitHub
- URL: https://github.com/jozic/scalaj
- Owner: jozic
- License: bsd-3-clause
- Created: 2015-01-16T22:39:29.000Z (almost 10 years ago)
- Default Branch: main
- Last Pushed: 2023-06-11T18:19:57.000Z (over 1 year ago)
- Last Synced: 2024-09-30T02:20:18.848Z (about 1 month ago)
- Topics: java, nested-collections, primitives, scala, scalaj-converters
- Language: Scala
- Homepage:
- Size: 125 KB
- Stars: 23
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
ScalaJ Converters [](https://github.com/jozic/scalaj/actions/workflows/checks.yml) [](https://coveralls.io/r/jozic/scalaj)
=================
### When JavaConverters is not enough...
If you work on a Java/Scala mixed project you can find yourself converting
java collections and/or primitive wrappers to/from corresponding scala classes or vice versa.
JavaConverters is your friend here, but it's not always good enough.
If you are tired of doing something like this
```scala
import scala.jdk.CollectionConverters._
def iTakeInt(i: Int) = { ... }
val something = someJavaListOfJavaIntegers.asScala.map(iTakeInt(_))
```
or this
```scala
import scala.jdk.CollectionConverters._
val something: mutable.Map[java.lang.Long, Buffer] =
someJavaMapOfJavaLongsToJavaLists.asScala.mapValues(_.asScala)
```
look no more!
Now you can do
```scala
import com.daodecode.scalaj.collection._
def iTakeInt(i: Int) = { ... }
val something = someJavaListOfJavaIntegers.deepAsScala.map(iTakeInt)
```
and
```scala
import com.daodecode.scalaj.collection._
val something: mutable.Map[Long, Buffer] =
someJavaMapOfJavaLongsToJavaLists.deepAsScala
```
ScalaJ Converters will go all the way down converting every nested collection or primitive type.
Of course you should be ready to pay some cost for all these conversions.
Import `import com.daodecode.scalaj.collection._` aslo brings standard `JavaConverters._` in scope,
so you can use plain `asJava/asScala` if you don't have nested collections or collections of primitives.
Having `scalaj-googloptional` in classpath you can add [guava Optionals](https://github.com/google/guava/blob/master/guava/src/com/google/common/base/Optional.java) to your
funky data structures and convert between them and scala versions all the way down and back.
```scala
val foo: java.util.Set[Optional[java.lang.Double] = ...
import com.daodecode.scalaj.googleoptional._
val scalaFoo: mutable.Set[Option[Double]] = foo.deepAsScala
```
If you want you scala collections ~~well-done~~ immutable, you can do it as well
```scala
val boo: java.util.Set[Optional[java.util.List[java.lang.Double]] = ...
import com.daodecode.scalaj.googleoptional._
import com.daodecode.scalaj.collection.immutable._
val immutableScalaBoo: Set[Option[immutable.Seq[Double]]] = boo.deepAsScalaImmutable
```
# Latest stable release
## scalaj-collection
| 2.10 | 2.11 | 2.12 | 2.13 | 3 |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-collection_2.10) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-collection_2.11) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-collection_2.12) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-collection_2.13) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-collection_3) |
### sbt
```scala
libraryDependencies += "com.daodecode" %% "scalaj-collection" % "0.3.2"
```
### maven
set `` property to scala version you need, like
```xml
2.13
```
and then in `dependencies` add
```xml
com.daodecode
scalaj-collection_${scala.binary.version}
0.3.2
```
## scalaj-googleoptional
| 2.10 | 2.11 | 2.12 | 2.13 | 3 |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-googleoptional_2.10) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-googleoptional_2.11) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-googleoptional_2.12) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-googleoptional_2.13) | [](https://maven-badges.herokuapp.com/maven-central/com.daodecode/scalaj-googleoptional_3) |
### sbt
```scala
libraryDependencies += "com.daodecode" %% "scalaj-googleoptional" % "0.3.2"
```
### maven
```xml
2.13
```
and then in `dependencies` add
```xml
com.daodecode
scalaj-googleoptional_${scala.binary.version}
0.3.2
```
# Latest snapshot
First add sonatype snapshots repository to your settings
### sbt
```scala
resolvers += Resolver.sonatypeRepo("snapshots")
```
### maven
```xml
snapshots-repo
https://oss.sonatype.org/content/repositories/snapshots
false
true
```
then add snapshot as a dependency
## scalaj-collection
### sbt
```scala
libraryDependencies += "com.daodecode" %% "scalaj-collection" % "0.3.3-SNAPSHOT"
```
### maven
```xml
2.13
```
and then in `dependencies` add
```xml
com.daodecode
scalaj-collection_${scala.binary.version}
0.3.3-SNAPSHOT
```
## scalaj-googleoptional
### sbt
```scala
libraryDependencies += "com.daodecode" %% "scalaj-googleoptional" % "0.3.3-SNAPSHOT"
```
### maven
```xml
2.13
```
and then in `dependencies` add
```xml
com.daodecode
scalaj-googleoptional_${scala.binary.version}
0.3.3-SNAPSHOT
```
# Related projects
https://github.com/softprops/guavapants
https://github.com/scalaj/scalaj-collection