Initial commit : POC with ProcessBuilder and Flatpak

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.gitignore

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+/bin/

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>GDB_JavaUI</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.core.resources.prefs

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+eclipse.preferences.version=1
+encoding/<project>=UTF-8

.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=21
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=21

src/Main.java

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+
+public class Main {
+
+	public static void main(String[] args) {
+		System.out.println("Hello World !");
+		backend.Process p = new backend.Process("");
+
+	}
+
+}

src/backend/Process.java

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+package backend;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class Process {
+
+	private InputStream stdOut;
+	private java.lang.Process process;
+	private ProcessBuilder processBuilder;
+
+	public Process(String command) {
+
+		ProcessBuilder pb = null;
+		if (System.getenv("container") != null) {
+			if (System.getenv("container").equals("flatpak")) {
+				pb = new ProcessBuilder("flatpak-spawn", "--host", "kate");
+			}
+		}
+		if (pb == null) {
+			pb = new ProcessBuilder("kate");
+		}
+		try {
+			process = pb.start();
+			InputStream stdOut = process.getInputStream();
+			process.waitFor();
+			System.out.println(new String(stdOut.readAllBytes()));
+
+		} catch (IOException e) {
+			e.printStackTrace();
+		} catch (InterruptedException e) {
+			e.printStackTrace();
+		}
+	}
+}