Native example app for Linux

Author: manuelbl

examples/enumerate_native/README.md

@@ -10,6 +10,27 @@ this _Java Does USB_ library.
 
 - [GraalVM](https://www.graalvm.org/) 25 or higher
 - [Maven](https://maven.apache.org/) 3.9 or higher
+- Latest snapshot of _Java Does USB_
+
+
+#### Java Does USB Snapshot
+
+Check out the latest version of _Java Does USB_ and build it:
+
+```shell
+git clone https://github.com/manuelbl/JavaDoesUSB.git
+cd JavaDoesUSB/java-does-usb
+mvn clean install -DskipTests
+```
+
+The installation requires a valid GPG key pair. If you don't have one,
+create it with and do not set a password:
+
+```shell
+gpg --gen-key
+```
+
+The full name and email address can be anyone's.
 
 
 ### Preparation
@@ -26,7 +47,7 @@ Args = --enable-native-access=ALL-UNNAMED -H:ConfigurationFileDirectories=config
 ```
 
 Note the last word of the line. In this case, it is `macos`. Change this to
-`linux` or `windows` if needed. (Windows and Linux are yet to come.)
+`linux` or `windows` if needed. (Windows is yet to come.)
 
 In your own Maven project, you might also need to move the file or rather rename
 directory. It must be named according to the pattern

examples/enumerate_native/config/linux/reachability-metadata.json

@@ -0,0 +1,111 @@
+{
+  "foreign": {
+    "downcalls": [
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "void*",
+          "void*"
+        ]
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "void*",
+          "void*",
+          "void*"
+        ]
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "jint",
+          "jlong",
+          "void*"
+        ],
+        "options": {
+          "captureCallState": true,
+          "firstVariadicArg": 2
+        }
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "jint"
+        ]
+      },
+      {
+        "returnType": "void*",
+        "parameterTypes": [
+          "void*"
+        ]
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "jint",
+          "void*",
+          "jint",
+          "jint"
+        ],
+        "options": {
+          "captureCallState": true
+        }
+      },
+      {
+        "returnType": "void*",
+        "parameterTypes": []
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "jint"
+        ],
+        "options": {
+          "captureCallState": true
+        }
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "void*",
+          "jint"
+        ],
+        "options": {
+          "captureCallState": true
+        }
+      },
+      {
+        "returnType": "void*",
+        "parameterTypes": [
+          "void*",
+          "void*"
+        ]
+      },
+      {
+        "returnType": "void*",
+        "parameterTypes": [
+          "jint"
+        ]
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "void*"
+        ]
+      },
+      {
+        "returnType": "jint",
+        "parameterTypes": [
+          "jint",
+          "jint",
+          "jint",
+          "void*"
+        ],
+        "options": {
+          "captureCallState": true
+        }
+      }
+    ]
+  }
+}