Scala reflect io file

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• 1 GC: G1 Young Generation, G1 Old Generation Memory The scala-reflection library was first envisioned to facilitate migrating ScalaJack serialization, which depends heavily on runtime reflection, to Scala 3. answered Jul 14, 2010 at 15:21. collection and its sub-packages contain Scala's collections framework Jul 30, 2011 · Here is a concise one-liner using reflect. 12 as mentioned in the instructions, but I am unable to install it. Instant dev environments Oct 6, 2014 · Once the file is created, when the same code block is run again, it should not run the same set of instructions since it has already been executed before, here the file is used as a guard. sys - Interaction with other processes and the operating system. After reading this article, we’re ready to read its documentation to get ready to provide solutions to more sophisticated problems. java. Jan 28, 2015 · Scala IDEs try to save time by optimizing the compile process. sys - Interaction with other processes and the operating system; scala. matching - Regular expressions. I am trying to set up gatling project in a new server and have been facing issues ever since with maven execution due to scala files compilation errors. For this data frame. 10, also latest 2. This made me fire up the old cygwin I installed last spring, when pandemic lockdown was a passing thing. . (Or use java. Resolve1Test being compiled against a different version of the Scala library than the code depending on it is eventually run against. Jun 28, 2016 · Scala Compilers. The files have same columns but the order of the columns are not exactly the same. MissingRequirementError: object java. txt. 6. Codec. 我们可以使用Java的java. The main REPL related classes and values are as follows. It is possible that you experience an issue that was already reported and fixed. 根据具体的需求和习惯，我们可以选择合适的方法来处理文件夹 Scala 如何使用Scala语言从文件夹中读取文件并对读取到的文件进行处理. You signed out in another tab or window. SparkContext. you must manually add manually. Exposes information about the file as a part of a real or virtual file system along with the contents of that file. getAbsolutePath) } Thanks for the help, guys. The first solution we can use comes from Java: the Class. It workes from IDE though. It provides a view of Typed Abstract Syntax Trees and their properties such as types, symbols, positions and comments. md) is kept. Feb 13, 2010 · Reproduction steps Scala version: 2. Apr 2, 2021 · 0. May 7, 2015 · When you did that, sbt created things in your directory (like the target directories) as root, and now they're owned by root. FileWriter to desired target file with proper synchronisation (will be accessed from various threads), which is still blocking IO. File And a question about this "File". in intellij idea files -> project structure -> library tab -> scroll and search for the extra added library -> press the '-' icon at top left side of the dialog box. scala never releases the Oct 29, 2013 · Using Scala 2. For character data, a Codec * can be supplied at either creation time or when a method * involving character data is called (with the latter taking * precedence if supplied. getClass. but using sub directory i dont know how. in example above I assume you get a list of userId and you write it in a single line. Thread. inputStream // Arguments -> InputStream, Encoding, OutputDateType: EPOCH_SECONDS, JAVA_TEMPORAL, SAS_VALUE val sasFile: SasFileReaderImpl = new SasFileReaderImpl (file, null, OutputDateType. scala (directory, path, string) LAMP/EPFL * @author Paul Phillips */ package scala package reflect package io import java. txt") . Date and Time Utilities. 12. file, this works with Scala 2. open0(Native Method) sbt assembly merge issue [deduplicate: different file contents found in the following] 8 sbt assembly error:deduplicate: different file contents found in io. As with Java, you can import members at the top of a class definition, and then use the imported resource later in your code: def printRandom {. template should be renamed to spark-env. scala-lang. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. scala) This example Scala source code file (File. mkdir(); var FileName: String = Directory + File. // to specify in detail how the write should take place. Streamable Streamable. Update. spark. txt test-copy. currentMirror import java. This class implements methods to read and decode source files. val r = new Random. apache. netty. It should not be used unless you know what you are doing. // By default the file write will replace. sealed trait Pet [ T] {. When you re-run sbt as yourself, you can't access those directories anymore. toByte)) // another option for write is openOptions which allows the caller. Oct 8, 2020 · Hey, it worked! fsdow. Used By. Reflection Libraries. In this tutorial, we’ll learn different approaches to reading a file from the resources folder in Scala. Try removing the . Random. 4 (Community Edition) Build #IC-231. extempore, why is this file marked as "experimental"? Is it safe? Does it free a lock to the file system? – Feb 26, 2016 · This happens due to internal mapping between directories. I think that your problem is that scala library is not in your runtime classpath. csv"). First go to the directory where your file (README. x -> 8fa1e7c1 Sbt version: 1. 0-preview2. Source b. com/scala/scala/blob/2. 11: is it deprecated or not. File。 val inputFile = scala. |-- uniqueID: string. scala-io-file License: Scala: Categories: I/O Utilities: Tags Source file if this symbol is created during this compilation run, or a class file if this symbol is loaded from a *. default is used. lang. getProtectionDomain. sh. sbt. load("my_path/hdfs Nov 17, 2017 · before creating the spark context and sql context we need to load this two line of code. 13. 在本文中，我们将介绍如何使用Scala语言从文件夹中读取文件，并对读取到的文件进行处理。 阅读更多：Scala 教程. Description Issues after downloading the pipeline from sparknlp. Also a recent problem I've had with intellij is that it hasn't been updating dependencies properly. pretrained import PretrainedPipeline import sparknlp spark = sparknlp. Directory. First, InsertData should be an object not a class. The API can be used in macros as well as Feb 12, 2010 · This is build-time error, not compile-time error, so there is no sense to add scala-reflect to build. currentMirror和java. listFiles. I'm not sure, to what extent this makes use of the new File (path) API in JDK7. Jan 5, 2011 · val file: FileOps = Path ("file") // write bytes. tools. nsc. object InsertData {. so this caused the confusion with the signature. So most of the stuff I found (also on SO ) recommends I use io. 总结. Object in compiler mirror not found. A workaround is to add the scala-compiler to the maven project. Path", so you should wait to see what he came up with. Feb 27, 2013 · 7. ZipArchiveT Aug 24, 2020 · A collaborative platform to connect and grow with like-minded Informaticans across the globe . The class we need to import here is scala. } } Second, you aren't actually connecting to Spark anywhere. string2codec import scala. In Scala 2. Using getClass. Explore Teams Create a free Team import scala. scala test. 16 aarch64 VM: OpenJDK 64-Bit Server VM by JetBrains s. Your input RDD is not getting created that's why its not able to create an output. If you are not using these tools, add "scala-library. o. One of ScalaJack's key features is its trait handling ability. Central (117) It is an old question, but I still need it needs some update. reflect - Scala's reflection API (scala-reflect. getCodeSource. 7+10-b829. properties The main REPL related classes and values are as follows. ) The best I can come up with is: scala. Since in pandas we can set sort=True when append DataFrame so that same columns in different position won't get confused, I suspected it is the order of the columns that cause the issue. Package structure . test. sql. Solution. You can place an import statement almost anywhere inside a program. What's a simple and canonical way to read an entire file into memory in Scala? (Ideally, with control over character encoding. root. separator + "samplefile" + ". isFile). Import your favorite libraries, write your code, run it, create unit tests, share it as a gist, or publish it to Maven Central. txt" val file:File = new File("file1. Path type PlainFile = reflect. 1 org. Overall, Scala resources work just the same way as Java resources do. I am using IntelliJ IDEA Community Edition: IntelliJ IDEA 2023. scala) is included in my "Source Code Warehouse" project. This selects all files that end in . The list of files is not actually evaluated until get is called: Feb 11, 2024 · The type checker might need time to catch up, and occasionally it might fail. The reflection API provides a more complex and comprehensive view on the structure of the code. beans. In the Invalidate Caches dialog, select an action. If you think the following scala-reflect-2. Scala example source code file: Path. xml - XML parsing Jul 22, 2019 · You signed in with another tab or window. toURI. 7. compiler reflection scala. FileAlreadyExistsException Jul 22, 2013 · Paul Phillips just mentioned parenthetically on ML, "I wrote a library which does a bunch of wrapping of java. 10. See the complete list on the right. where i is the first letter of the uniqueID. lang" is Java Modules thing, which started in Java 9. BufferedReader reader = new BufferedReader(new InputStreamReader(. BeanProperty. However, after trying it out like so, reading a UTF-8 file: val user_list = Source When you invalidate the cache, IntelliJ IDEA rebuilds all projects ever run in the current version of the IDE. File object WordCounter { val SrcDestination: String = ". exe set PYSPARK_DRIVER_PYTHON=C:\Users\usr\anaconda3\python. At the time of this writing, there are no custom Scala libraries for reading YAML files, so use the Java Snakeyaml library, as shown in the following example /** An abstraction for files. Files类来进行路径或文件存在性的检查。通过学习这些方法，我们可以更好地处理文件操作，提高编程效率和代码质量。希望本文对您在Scala中检查路径或文件是否存在有所帮助。 Jul 23, 2018 · But the tools. Other packages exist. Dec 7, 2021 · Solution. Bytes { def inputStream() = is } toByteArray May 15, 2018 · I think you need to specify the input file path correctly. after creating the sparkcontext and sqlcontext from sc = pyspark. AbstractFile, which belongs to an experimental part of Scala reflection. 4,222 artifacts. io. io Mar 14, 2016 · Simplest solution to this is to write to different files, but you can still run out of maximum possible number of opened files. Apr 18, 2016 · I have this function below for filter a list of files. org Mar 18, 2024 · In this article, we tried to explore some of the most common use cases of Scala’s reflection API for runtime reflection. java:834) The notion of "java. In addition to standard compiler classes Global and Settings, there are: History: an interface for session history. base/java. 2-----I am a Java engineer, and started to learn Scala from yesterday, but I got stuck now, this simply code does not work for me, but when I use java to write it, it works fine: Apr 5, 2019 · where i put all my text files, i know how to read file from resources directly with: val sdf = "file1. You will get the actual mount point of the directory. txt with the following content: Hello World. You can make that an answer if you like. FileOutputStream. First, define a helper function using, which takes care of open/close the file. log". Jul 25, 2023 · Hi Forum, I am trying to install Scala 2. def main(arg: Array[String]) {. filter(_. 0 [as well as] org. You should use isFile or isRegularFile instead of exists since exists don´t take in account if is a File or a Directory and can mislead the application in case there is a directory with the same name. // the openOptions parameter takes a May 6, 2023 · To test if a file or directory exists, we can use the File#exists () method. File (fileName) val file = inputFile. close} type File = reflect. sudo update-alternatives --config javac[Tab] Check if If you think the following scala-reflect-2. You'll need to add something like this in your app: Feb 9, 2021 · But for you, you were actually depending on that dependency for reasons unrelated to portable-scala-reflect. Scala CLI gives all the tools you need to create simple Scala projects. For me I upgraded my SpringBoot version which changed my spring-kafka-test version which intern included kafka 2. Getting the current working directory has usually nothing to do with Scala's reflection capabilities. Ranking. 12 and 2. getLocation. getPath). On this, we call the method mkString, like we’ve seen in different collections so far. Aug 12, 2013 · My scala application will be packaged into a jar. txt has Hello World as its content. From the main menu, select File | Invalidate Caches / Restart. 第二种方法使用Scala的io包，通过File对象的listRecursively方法来实现。. sbt test or sbt testOnly scala. 本文中，我们介绍了两种方法来遍历数据湖中文件夹中的所有文件。. scala> import scala. run(Thread. You can check more advanced example for Apr 24, 2015 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Mar 4, 2019 · I met same issue when reading data from multiple files. File类、Scala的scala. Path类，或者Scala中的java. exe set HADOOP_HOME=c:\winutils Oct 16, 2018 · I'm trying to code in the simplest way a program to count word occurrences in file in Scala Language. May 6, 2023 · Files. To read the contents of this file, we call the fromFile() method of class Source- with the filename as argument. getResource method which returns a URL. Reading From the File. reflect. Now I have a couple dozen cygwin64/tmp/junit* files from April and yesterday. annotator import * from sparknlp. Android Platform. Feb 7, 2020 · This is inconsistent with what the stack trace is showing: at java. Source import scala. This method returns a boolean indicating if the file or directory denoted by the given pathname exists: scala> import java. i am trying to do something like Sep 30, 2016 · scala. set PYSPARK_PYTHON=C:\Users\usr\anaconda3\python. write("hello world"); p. This is the documentation for the Scala standard library. Scala IO File. 16, built on July 12, 2023 Runtime version: 17. 12: reflect. But the scala. I am using spark 3. See full list on docs. Feb 5, 2019 · Remark on scala. write throws an exception if the file already exists: Scala 2 and 3 os . def scalaSources(base: File): PathFinder = (base / "src") ** "*. scala> File ( "/tmp/baeldung. 0. I don't understand what is the difference. 1 Java 8 and 11 Maybe you need java-atk-wrapper. as[Seq[String]]. 12 that works with JDK 11. scala-lang:scala-library. Try to update IntelliJ IDEA and the Scala plugin. // stuff. txt" ). g. jar) scala. You can import members inside a class: import scala. ah yea - that's right . txt, run the following from the command line: scala copy. I am looking for functionality similar to the Typesafe Config library but other solutions are welcome too ! Is there a way to do something like below: val hdfsConfig = ConfigFactory. Overview. To me it seems legit that you needed to add that dependency. JDBC Drivers. addFile(url) this solution worked for me. The scala package contains core types like Int, Float, Array or Option which are accessible in all Scala compilation units without explicit qualification or imports. bytes(is) Don't remember how recent that is: probably measured in days. os. val name: String val numLegs: Int val special: T. var dir: File = new File("Directory"); dir. The following 2 code snippet, one is java (working), another is scala (not working). As a complete beginner in the language, I wanted to make sure to find the right way to do it, e. run command : df -k . File instead of scala. 11. Source. The ** method accepts a java. Directory import java. I am trying to read a property file from classpath using scala. remove one of the added library . It's not your code that needs scala-reflect but sbt. I was wondering how I could filter so it only returns files that end in . // an existing file with the new data. The thing is in binary incompatibility between sbt zinc compiler-bridge and scala-reflect. Additional parts of the standard library are shipped as separate libraries. idea folder and reimporting the project. You should see as below:- Jul 3, 2018 · A couple things could be wrong here including how you packaged your jar. Also for the record , I tried the POM file with the latest version. base import * from sparknlp. Jan 16, 2021 · The stack trace seems to hint at trajspec. File: I don't see any reason to look into scala. 第一种方法使用Java NIO包，通过Files和Paths类来实现。. map(_. Scala example source code file (File. jar. PlainNioFile appeared in scala-reflect 2. scala_history (Access is denied) at java. Sep 1, 2020 · import scala. edited Dec 14, 2010 at 18:54. } Oct 9, 2017 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Jun 22, 2018 · Issue : java. writeAll("hello world") Alternatively, if you want to use the Java libraries you can do this hack: Some(new PrintWriter("filename")). #119 in MvnRepository ( See Top Artifacts) #1 in Scala Compilers. get the encoding right. After creating test. file. jar or similar on your classpath, see below. May 30, 2022 · 1. File type JFile = java. FileOutputStream resp. write ( path , "this will fail" ) // this exception is thrown: // java. The output should be stored like below for all the rows. The intent of this project is to help you more easily find Scala source code examples by using tags. When I open Spark-shell, it opens perfectly but when I try to import org. You now either have to fix all of the directory/file ownerships/permissions, or delete them all. write (Array (1,2,3) map ( _. Reload to refresh your session. 10, a new reflection library was introduced not only to address the shortcomings of Java's runtime The power of Scala in one file. Another solution is to use shared java. read more on the Scala CLI website Mar 25, 2022 · Normally the Scala version is in the build settings, so it’s normally irrelevant what version scala --version reports, since the build tools don’t just use whatever installed Scala is lying around, they use the exact one the build specifies. x which finally included scala libs. 1. versions. 2. png or . File("data. new Streamable. getResource. 8. Feb 26, 2020 · I can confirm the fix is validation dependencies. macOS 13. File. EPOCH_SECONDS); // or simply with default values: val sasFile: SasFileReaderImpl Dec 7, 2021 · You need to read a YAML configuration file in a Scala application. cmd and the following should be inserted. Mar 25, 2021 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. class or *. foreach{p => p. |-- moreData: array. Because of this, for now I would go with the simple Java: Apr 27, 2012 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Jan 27, 2016 · The implementation of the ZipArchive abstract file backend https://github. Clear the system cache 1. " Find and fix vulnerabilities Codespaces. scala. nio. io. runtime. Scala可以直接使用Java的File类来读取文件夹中的文件。 9. var Directory: String = "Dir1". File; perhaps even that was not intentional, and was just the result of an IDE's auto-import feature?) in scala-2. PlainFile class SourceReader extends AnyRef. 9225. r. util. 0 the package name is scala. jar downloaded from Maven central repository is inappropriate, such as containing malicious code/tools or violating the copyright, please email , thanks. 8, it's more like. The return type is scala. txt? def getListOfFiles(directoryName: String): Array[String] = { return (new File(directoryName)). Apr 22, 2017 · 2. But it looks like it won't work, it is different from java. jar" to your library directory. internal. reflect. deleteRecursively() Remove dir in AWS S3 before recreate file : AWS S3 has read-after-write consistency on PUTS objects ,eventual consistency for overwrite PUTS and DELETES objects so once you delete will not remove same time and will Jan 10, 2024 · Clearly this is not about the lack of skill or knowledge of scala. Jul 29, 2011 · There is no scala-specific IO implementation at the moment, although I understand one written by Jesse Eichar is in incubation. matching - Regular expressions; Other packages exist. Going back to 2. I'm reading and writings some text files in Scala. You can figure out how to change your IntelliJ configuration to use JDK 8 or use Scala 2. Change. File val scriptPath = new File(currentMirror. 4. SQLException: Another instance of Derby may have already booted the database D:\Spark-Scala\Projet-test\metastore_db. 13, BeanProperty can now be found as scala. fromFile . If you find a ticket describing an issue similar to yours Sep 29, 2011 · I can find tons of examples but they seem to either rely mostly on Java libraries or just read characters/lines/etc. File val dir = new Directory(new File("/yourDirectory")) dir. 2. xml - XML parsing Feb 7, 2019 · as mentioned above, but in case of windows the spark-env. Notable packages include: scala. exists() val res0: Boolean = true. xml - XML parsing May 2, 2020 · 1. I have a fairly large dataframe (million rows), and the requirement is to store each of the row in a separate json file. Facing a different set of errors. Unless otherwise stated, all the code examples in this page assume you are using Scala 3. mkString(",")+"\n") session. Let’s start by Source file if this symbol is created during this compilation run, or a class file if this symbol is loaded from a *. ) If neither is available, the value * of scala. FileFilter and selects all files matching that filter. Source file corresponding to this compilation unit. File type JManifest = Manifest class Jar extends AbstractIterable [JarEntry] class JarWriter extends AnyRef type Path = reflect. These include: scala. 使用Java的File类. getOrCreate and sqlContext = SQLContext(sc) add the http or https url into the sc by using sc. Here are more reasons not to use scala. You switched accounts on another tab or window. appendAll(session("userIds"). Nov 7, 2016 · Maybe, you can try the following solution, which makes the codes more functional and takes the advantage of lazy evaluation. Scala CLI is fast, low-config, works with IDEs, and follows well-known conventions. Verify that test-copy. // working. Tags. scala" get . FileNotFoundException: C:\Users\mail2\. st Feb 8, 2010 · To try this out create a file called test. File("filename"). Feb 5, 2011 · import scala. SparkConf I get the following error: Exception in thread "Thread-16" java. I just want to read in some file and get a byte array with scala libraries - can The following examples show how to use scala. You can use session to first save all the required values and later save it to the file via exec call: scala. If you are using tools like maven or sbt, maybe the dependency is marked as provided instead compiled. File is the better choice. This issue happens because of Metastore_db. When I run my app, it needs to read an additional config file stored externally to my app jar. reflect packages for such mundane tasks. You may also look through our list of open and fixed tickets on our YouTrack. fromPath("file. scala that are in src or a descendent directory. Aug 7, 2015 · I'm getting below exception while counting the file rows : Actually code is working fine if i executes shell in local mode : But If we try shell with Yarn-client mode -- the below exceptions stac If you think the following scala-reflect-2. File is more recent - i'm actually unclear what is its status with scala 2. getParent println("当前脚本文件路径：" + scriptPath) 在上面的示例中，我们首先导入了scala. File: link. In addition to these Scala-specific types, Java reflection is also unable to recover runtime type info of Java types that are generic at compile-time; a restriction that carried through to runtime reflection on generic types in Scala. So far I have these piece of code: import scala. file. x/src/reflect/scala/reflect/io/ZipArchive. def printRandom {. 1. lj ub xp ab il cy tb hl rl gi