Extension and top-level functions to use JDK7/JDK8 features in Kotlin 1.0

Related tags

Kotlin kotlinx.support
Overview

kotlinx.support

Provides extension and top-level functions to use JDK7/JDK8 features in Kotlin 1.0.

In Kotlin 1.1+ please use the standard library artifacts instead: kotlin-stdlib-jdk7 and kotlin-stdlib-jdk8.

obsolete JetBrains project Download

Maven

Add jcenter repository (if you don't have it yet)

<repository>
    <snapshots>
        <enabled>false</enabled>
    </snapshots>
    <id>central</id>
    <name>bintray</name>
    <url>https://jcenter.bintray.com</url>
</repository>

Add a dependency:

<dependency>
    <groupId>org.jetbrains.kotlinx</groupId>
    <artifactId>kotlinx-support-jdk8</artifactId>
    <version>0.3</version>
</dependency>

Gradle

Just add a dependency:

compile 'org.jetbrains.kotlinx:kotlinx-support-jdk8:0.3'

jcenter repository should be configured by default in gradle, but if it's not you may need to include it:

repositories {
    jcenter()
}
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Comments
  • AutoCloseable.use with null receiver causes cryptic exception

    AutoCloseable.use with null receiver causes cryptic exception

    Test code:

    // Kotlin
fun main(args: Array<String>) {
  MyResourceFactory.get().use {
    throw Exception("1")
  }
}

class MyResource : AutoCloseable {
  override fun close() {
    println("close")
  }
}

// Java
public class MyResourceFactory {
    public static MyResource get() {
        return null;
    }
}

    This code results in this exception:

    Exception in thread "main" java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlinx.support.jdk7.AutoCloseableKt.closeSuppressed, parameter $receiver
    at kotlinx.support.jdk7.AutoCloseableKt.closeSuppressed(AutoCloseable.kt)
    at test.MainKt.main(main.kt:31)

    and original exception is eaten.

    If I use Closeable and use from a standard library, error message is much clearer:

    Exception in thread "main" java.lang.Exception: 1
    opened by vbezhenar 2
  • Extensions for 'Path' from JDK7

    Extensions for 'Path' from JDK7

    This is a work in progress.

    The current version is basically a copy/paste of the extensions we use internally. I think this already allows for much better code than Files.foo(Files.bar(...), Files.boo()). However, there's also an option of mirroring the API Kotlin provides for File.

    I'm not sure which way is best, what do you think?

    opened by superbobry 2
  • AutoCloseable.use must be implemented using try-finally

    AutoCloseable.use must be implemented using try-finally

    Example to reproduce:

    import kotlinx.support.jdk7.use

fun main(args: Array<String>) {
  MyAutoCloseable().use {
    return
  }
}

class MyAutoCloseable : AutoCloseable {
  override fun close() {
    println("AutoCloseable.close")
  }
}

    This example doesn't call close(). Standard library's Closeable.use correctly closes resource even with return.

    opened by vbezhenar 1
Releases(0.3)

  • 0.3(Aug 9, 2016)

  • 0.2(Jun 30, 2016)

    Changes in this release:

    • expose Throwable.suppressed as a property, in addition to getSuppressed() function;
    • utility extensions for Streams to convert them to List and Sequence;
    • fix bug #3 with non-local returns in AutoCloseable.use.
    Source code(tar.gz)
    Source code(zip)
Owner
Kotlin
Kotlin Tools and Libraries
Kotlin
GitHub
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