Generate JPMS compatible artifacts in addtion to the existing artifacts

CHANGES.md

@@ -9,6 +9,7 @@ Features
 --------
 * [#1217](https://github.com/java-native-access/jna/pull/1217): Add mappings for AIX `Perfstat` library to `c.s.j.p.unix.aix` - [@dbwiddis](https://github.com/dbwiddis).
 * [#1231](https://github.com/java-native-access/jna/pull/1231): The test suite can now be executed on Windows using either ANSI or UNICODE win32 API by passing `-Dw32.ascii=true/false` to ant. Previously, UNICODE was always used. - [@T-Svensson](https://github.com/T-Svensson/)
+* [#????](https://github.com/java-native-access/jna/pull/????): *Experimental:* Add artifacts that make jna and jna-platform named modules (provide `module-info.class`). The new artifacts are named `jna-jpms.jar` and `jna-platform-jpms.jar` - [@matthiasblaesing](https://github.com/matthiasblaesing).
 
 Bug Fixes
 ---------

ant-tools-src/com/sun/jna/CalcAndroidVersion.java → ant-tools-src/com/sun/jna/ant/CalcAndroidVersion.java

@@ -22,7 +22,7 @@
  * containing JNA, in file "AL2.0".
  */
 
-package com.sun.jna;
+package com.sun.jna.ant;
 
 import java.io.IOException;
 import org.apache.tools.ant.Project;

ant-tools-src/com/sun/jna/ant/Exports.java

@@ -0,0 +1,77 @@
+/* Copyright (c) 2020 Matthias Bläsing, All Rights Reserved
+ *
+ * The contents of this file is dual-licensed under 2
+ * alternative Open Source/Free licenses: LGPL 2.1 or later and
+ * Apache License 2.0. (starting with JNA version 4.0.0).
+ *
+ * You can freely decide which license you want to apply to
+ * the project.
+ *
+ * You may obtain a copy of the LGPL License at:
+ *
+ * http://www.gnu.org/licenses/licenses.html
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "LGPL2.1".
+ *
+ * You may obtain a copy of the Apache License at:
+ *
+ * http://www.apache.org/licenses/
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "AL2.0".
+ */
+
+package com.sun.jna.ant;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class Exports {
+    private String packageName;
+    private String to;
+
+    public String getPackage() {
+        return packageName;
+    }
+
+    public void setPackage(String packageName) {
+        this.packageName = packageName;
+    }
+
+    public String getBinaryPackageName() {
+        return packageName.replace(".", "/");
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public void setTo(String to) {
+        this.to = to;
+    }
+
+    public String[] getToList() {
+        if(to == null) {
+            return null;
+        } else {
+            Set<String> toList = new HashSet<String>();
+            for(String s: to.split(",")) {
+                String entry = s.trim();
+                if(! entry.isEmpty()) {
+                    toList.add(entry);
+                }
+            }
+            if(toList.isEmpty()) {
+                return null;
+            } else {
+                return toList.toArray(new String[0]);
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "Export{" + "package=" + packageName + ", to=" + to + '}';
+    }
+}

ant-tools-src/com/sun/jna/ant/ModuleGenerator.java

@@ -0,0 +1,193 @@
+/* Copyright (c) 2020 Matthias Bläsing, All Rights Reserved
+ *
+ * The contents of this file is dual-licensed under 2
+ * alternative Open Source/Free licenses: LGPL 2.1 or later and
+ * Apache License 2.0. (starting with JNA version 4.0.0).
+ *
+ * You can freely decide which license you want to apply to
+ * the project.
+ *
+ * You may obtain a copy of the LGPL License at:
+ *
+ * http://www.gnu.org/licenses/licenses.html
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "LGPL2.1".
+ *
+ * You may obtain a copy of the Apache License at:
+ *
+ * http://www.apache.org/licenses/
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "AL2.0".
+ */
+
+package com.sun.jna.ant;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.ModuleVisitor;
+import static org.objectweb.asm.Opcodes.*;
+
+public class ModuleGenerator {
+    private String name;
+    private String version;
+    private boolean open;
+    private String mainClass;
+    private File targetFile;
+    private List<Exports> exports = new ArrayList<Exports>();
+    private List<Opens> opens = new ArrayList<Opens>();
+    private List<Requires> requires = new ArrayList<Requires>();
+    private List<Package> packages = new ArrayList<Package>();
+
+    public File getTargetFile() {
+        return targetFile;
+    }
+
+    public void setTargetFile(File targetFile) {
+        this.targetFile = targetFile;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getVersion() {
+        return version;
+    }
+
+    public void setVersion(String version) {
+        this.version = version;
+    }
+
+    public boolean isOpen() {
+        return open;
+    }
+
+    public void setOpen(boolean open) {
+        this.open = open;
+    }
+
+    public String getMainClass() {
+        return mainClass;
+    }
+
+    public void setMainClass(String mainClass) {
+        this.mainClass = mainClass;
+    }
+
+    public String getMainClassBinary() {
+        if(mainClass != null) {
+            return mainClass.replace(".", "/");
+        } else {
+            return mainClass;
+        }
+    }
+
+    public Exports createExports() {
+        Exports export = new Exports();
+        this.exports.add(export);
+        return export;
+    }
+
+    public List<Exports> getExports() {
+        return exports;
+    }
+
+    public void setExports(List<Exports> exports) {
+        this.exports = exports;
+    }
+
+    public Requires createRequires() {
+        Requires require = new Requires();
+        this.requires.add(require);
+        return require;
+    }
+
+    public List<Requires> getRequires() {
+        return requires;
+    }
+
+    public void setRequires(List<Requires> requires) {
+        this.requires = requires;
+    }
+
+    public Opens createOpens() {
+        Opens openEntry = new Opens();
+        this.opens.add(openEntry);
+        return openEntry;
+    }
+
+    public List<Opens> getOpens() {
+        return opens;
+    }
+
+    public void setOpens(List<Opens> opens) {
+        this.opens = opens;
+    }
+
+    public Package createPackage() {
+        Package packageEntry = new Package();
+        this.packages.add(packageEntry);
+        return packageEntry;
+    }
+
+    public List<Package> getPackages() {
+        return packages;
+    }
+
+    public void setPackages(List<Package> packageEntry) {
+        this.packages = packageEntry;
+    }
+
+    public void execute() throws IOException {
+        System.out.println(this);
+        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
+        cw.visit(V9, ACC_MODULE, "module-info", null, null, null);
+        ModuleVisitor mv = cw.visitModule(name, (open ? ACC_OPEN : 0), version);
+        mv.visitRequire("java.base", ACC_MANDATED, null);
+        for(Requires require: requires) {
+            mv.visitRequire(
+                require.getModule(),
+                (require.isStatic() ? ACC_STATIC : 0)|( require.isTransitive() ? ACC_TRANSITIVE : 0),
+                null);
+        }
+        for(Exports export: exports) {
+            mv.visitExport(
+                export.getBinaryPackageName(),
+                0,
+                export.getToList()
+            );
+        }
+        for(Opens openEntry: opens) {
+            mv.visitOpen(
+                openEntry.getBinaryPackageName(),
+                0,
+                openEntry.getToList());
+        }
+        for(Package packageEntry: packages) {
+            mv.visitPackage(packageEntry.getName());
+        }
+        if(getMainClassBinary() != null) {
+            mv.visitMainClass(getMainClassBinary());
+        }
+        mv.visitEnd();
+        cw.visitEnd();
+        try (FileOutputStream fos = new FileOutputStream(targetFile)) {
+            fos.write(cw.toByteArray());
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "ModuleGenerator{" + "name=" + name + ", version=" + version + ", open=" + open + ", mainClass=" + mainClass + ", targetFile=" + targetFile + ", exports=" + exports + ", opens=" + opens + ", requires=" + requires + ", packages=" + packages + '}';
+    }
+}

ant-tools-src/com/sun/jna/ant/Opens.java

@@ -0,0 +1,77 @@
+/* Copyright (c) 2020 Matthias Bläsing, All Rights Reserved
+ *
+ * The contents of this file is dual-licensed under 2
+ * alternative Open Source/Free licenses: LGPL 2.1 or later and
+ * Apache License 2.0. (starting with JNA version 4.0.0).
+ *
+ * You can freely decide which license you want to apply to
+ * the project.
+ *
+ * You may obtain a copy of the LGPL License at:
+ *
+ * http://www.gnu.org/licenses/licenses.html
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "LGPL2.1".
+ *
+ * You may obtain a copy of the Apache License at:
+ *
+ * http://www.apache.org/licenses/
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "AL2.0".
+ */
+
+package com.sun.jna.ant;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class Opens {
+    private String packageName;
+    private String to;
+
+    public String getPackage() {
+        return packageName;
+    }
+
+    public void setPackage(String packageName) {
+        this.packageName = packageName;
+    }
+
+    public String getBinaryPackageName() {
+        return packageName.replace(".", "/");
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public void setTo(String to) {
+        this.to = to;
+    }
+
+    public String[] getToList() {
+        if(to == null) {
+            return null;
+        } else {
+            Set<String> toList = new HashSet<String>();
+            for(String s: to.split(",")) {
+                String entry = s.trim();
+                if(! entry.isEmpty()) {
+                    toList.add(entry);
+                }
+            }
+            if(toList.isEmpty()) {
+                return null;
+            } else {
+                return toList.toArray(new String[0]);
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "Opens{" + "packageName=" + packageName + ", to=" + to + '}';
+    }
+}