feat(dissertation): add vdmj explanation

pub/dissertation/code/vdmj-interact.kt

@@ -0,0 +1,55 @@
+package io.anthonyberg.connector.shared.vdmj
+
+import com.fujitsu.vdmj.messages.Console
+import com.fujitsu.vdmj.messages.ConsolePrintWriter
+import com.fujitsu.vdmj.plugins.VDMJ
+import java.io.*
+
+object VDMJ {
+    // Create a ByteArrayOutputStream to capture the output
+    private val byteArrayOutputStream = ByteArrayOutputStream()
+    private val printStream = ConsolePrintWriter(byteArrayOutputStream)
+
+    // Input handlers
+    private val inputStream = PipedInputStream()
+    private val inputOutput = PipedOutputStream(inputStream)
+    private val bufferedReader = BufferedReader(InputStreamReader(inputStream))
+    private val writer = BufferedWriter(OutputStreamWriter(inputOutput))
+
+    // Save the old PrintStreams
+    private val oldOut = Console.out
+    private val oldErr = Console.err
+    private val oldIn = Console.`in`
+
+
+    init {
+        //VDMJ Initialization
+
+        // Redirect Console's PrintStreams to the new PrintStream
+        Console.out = printStream
+        Console.err = printStream
+        Console.`in` = bufferedReader
+
+        // Rest of VDMJ setup
+    }
+
+    suspend fun run(command: String): String {
+        // Clean previous console outputs
+        byteArrayOutputStream.reset()
+
+        // Run commands
+        withContext(Dispatchers.IO) {
+            writer.write(command)
+            writer.write(System.lineSeparator())
+            writer.flush()
+        }
+
+        // Convert the captured output to a string
+        var output = byteArrayOutputStream.toString()
+
+        // Clear console output again
+        byteArrayOutputStream.reset()
+
+        return VDMJExpression(output = output)
+    }
+}