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| # Manage File access | ||
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| Since Mac App Store apps are sandboxed, file access is restricted and needs special consideration. | ||
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| LogoRRR naturally needs access to files, and as such it poses a problem for the whole application. | ||
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| In order to grant LogoRRR access to files this module has been put into place. | ||
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| Direct access from Java to the necessary swift code and Mac OsX APIs is only possible via calling it via C code. | ||
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| Thus as an Java developer, you have to | ||
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| - call native code via JNI | ||
| - from this intermediate layer, call the OsX API | ||
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| This is far from pretty and quite involved, but at the moment it is the best I can come up with. | ||
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| Of course, this includes additional complexities in building the code and deployment, more libraries which have to be taken care of and subtle bugs which can easily creep in. | ||
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| Sadly, it is another road block for JavaFX development; only few developers will bite the bullet and go this path; but since you are reading this you belong to this elitist circle ;-) | ||
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| ## Links | ||
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| - https://stackoverflow.com/questions/27628385/write-call-swift-code-using-java-s-jni - how to call swift code from Java | ||
| - https://developer.apple.com/documentation/security/app_sandbox/accessing_files_from_the_macos_app_sandbox - API to call | ||
| - https://schlining.medium.com/a-simple-java-native-interface-jni-example-in-java-and-scala-68fdafe76f5f example on how to use scala & java and JNI |
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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <project xmlns="http://maven.apache.org/POM/4.0.0" | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
| <modelVersion>4.0.0</modelVersion> | ||
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| <parent> | ||
| <groupId>app.logorrr.dist.osx</groupId> | ||
| <artifactId>dist-osx</artifactId> | ||
| <version>${revision}${changelist}</version> | ||
| </parent> | ||
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| <artifactId>native-osx</artifactId> | ||
| <name>app.logorrr.dist.osx.native</name> | ||
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| <dependencies> | ||
| <dependency> | ||
| <groupId>org.scala-lang</groupId> | ||
| <artifactId>scala-library</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.scalatest</groupId> | ||
| <artifactId>scalatest_${scala.major.version}</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.scalacheck</groupId> | ||
| <artifactId>scalacheck_${scala.major.version}</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.scalatestplus</groupId> | ||
| <artifactId>scalacheck-1-15_${scala.major.version}</artifactId> | ||
| </dependency> | ||
| </dependencies> | ||
| <build> | ||
| <plugins> | ||
| <plugin> | ||
| <groupId>org.codehaus.mojo</groupId> | ||
| <artifactId>exec-maven-plugin</artifactId> | ||
| <executions> | ||
| <!-- generate header file if you change the signature of the native methods --> | ||
| <!-- | ||
| <execution> | ||
| <id>generate-header-file</id> | ||
| <phase>generate-sources</phase> | ||
| <goals> | ||
| <goal>exec</goal> | ||
| </goals> | ||
| <configuration> | ||
| <executable>${jdk.javac}</executable> | ||
| <workingDirectory>${project.build.directory}</workingDirectory> | ||
| <arguments> | ||
| <argument>-h</argument> | ||
| <argument>${project.basedir}/src/main/c</argument> | ||
| <argument>${project.basedir}/src/main/java/app/logorrr/SwiftHelloworld.java</argument> | ||
| </arguments> | ||
| </configuration> | ||
| </execution> | ||
| --> | ||
| <!-- compile swift code --> | ||
| <execution> | ||
| <id>compile-swift-code</id> | ||
| <phase>compile</phase> | ||
| <goals> | ||
| <goal>exec</goal> | ||
| </goals> | ||
| <configuration> | ||
| <executable>${osx.swiftc}</executable> | ||
| <workingDirectory>${project.basedir}/src/main/c/</workingDirectory> | ||
| <arguments> | ||
| <!-- SwiftCode.swift -emit-library -o libSwiftCode.dylib -Xlinker -install_name -Xlinker libSwiftCode.dylib --> | ||
| <argument>${project.basedir}/src/main/c/SwiftCode.swift</argument> | ||
| <argument>-emit-library</argument> | ||
| <argument>-o</argument> | ||
| <argument>${project.build.directory}/classes/libSwiftCode.dylib</argument> | ||
| <argument>-Xlinker</argument> | ||
| <argument>-install_name</argument> | ||
| <argument>-Xlinker</argument> | ||
| <argument>${project.build.directory}/classes/libSwiftCode.dylib</argument> | ||
| </arguments> | ||
| </configuration> | ||
| </execution> | ||
| <!-- compile c code --> | ||
| <execution> | ||
| <id>compile-c-code</id> | ||
| <phase>compile</phase> | ||
| <goals> | ||
| <goal>exec</goal> | ||
| </goals> | ||
| <configuration> | ||
| <executable>${osx.gcc}</executable> | ||
| <workingDirectory>${project.build.directory}</workingDirectory> | ||
| <arguments> | ||
| <!-- -I"$JAVA_HOME/include" -I"$JAVA_HOME/include/darwin/" -o libSwiftHelloWorld.dylib -dynamiclib helloworld_SwiftHelloWorld.c libSwiftCode.dylib --> | ||
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| <argument>-I${jdk.home}/include</argument> | ||
| <argument>-I${jdk.home}/include/darwin/</argument> | ||
| <argument>-o</argument> | ||
| <argument>${project.build.directory}/classes/libSwiftHelloWorld.dylib</argument> | ||
| <argument>-dynamiclib</argument> | ||
| <argument>${project.basedir}/src/main/c/SwiftHelloWorld.c</argument> | ||
| <argument>${project.build.directory}/classes/libSwiftCode.dylib</argument> | ||
| </arguments> | ||
| </configuration> | ||
| </execution> | ||
| </executions> | ||
| </plugin> | ||
| <plugin> | ||
| <groupId>net.alchim31.maven</groupId> | ||
| <artifactId>scala-maven-plugin</artifactId> | ||
| </plugin> | ||
| <plugin> | ||
| <groupId>org.scalatest</groupId> | ||
| <artifactId>scalatest-maven-plugin</artifactId> | ||
| </plugin> | ||
| </plugins> | ||
| </build> | ||
| </project> |
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| import Foundation | ||
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| // force the function to have a name callable by the c code | ||
| @_silgen_name("swiftHelloWorld") | ||
| public func swiftHelloWorld(number: Int) -> Int { | ||
| print("Hello world from Swift: \(number)") | ||
| return 69 | ||
| } |
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| #include <jni.h> | ||
| #include <stdio.h> | ||
| #include "app_logorrr_SwiftHelloWorld.h" | ||
| #include "app_logorrr_SwiftHelloWorld_swift.h" | ||
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| JNIEXPORT void JNICALL Java_app_logorrr_SwiftHelloWorld_printHelloWorldImpl | ||
| (JNIEnv *env, jclass clazz) { | ||
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| int result = swiftHelloWorld(42); | ||
| printf("%s%i%s", "Hello World from JNI! ", result, "\n"); | ||
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| } |
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dist/dist-osx/native-osx/src/main/c/app_logorrr_SwiftHelloWorld.h
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dist/dist-osx/native-osx/src/main/c/app_logorrr_SwiftHelloWorld_swift.h
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| int swiftHelloWorld(int); |
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dist/dist-osx/native-osx/src/main/java/app/logorrr/SwiftHelloWorld.java
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| package app.logorrr; | ||
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| public class SwiftHelloWorld { | ||
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| static { | ||
| System.loadLibrary("SwiftHelloWorld"); | ||
| } | ||
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| public static native void printHelloWorldImpl(); | ||
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| public static void main(final String[] args) { | ||
| printHelloWorldImpl(); | ||
| } | ||
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| } |
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dist/dist-osx/native-osx/src/main/scala/app/logorrr/OsxBridge.scala
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| package app.logorrr | ||
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| object OsxBridge { | ||
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| @native def printHelloWorldImpl() : Unit | ||
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| def main(args: Array[String]): Unit = { | ||
| System.loadLibrary("OsxBridge") | ||
| printHelloWorldImpl() | ||
| } | ||
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| } |
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