Added JavacOptions, JavadocOptions and JavaOptions File argument alte…

…rnatives with Path and String.

Relaxed the requirement to specify mainClass in a project and added support for module.

src/main/java/rife/bld/BaseProject.java

@@ -61,6 +61,13 @@ public class BaseProject extends BuildExecutor {
      * @since 1.5
      */
     protected String mainClass = null;
+    /**
+     * The project's module.
+     *
+     * @see #module()
+     * @since 2.1
+     */
+    protected String module = null;
 
     /**
      * The project's repositories for dependency resolution.
@@ -1399,12 +1406,18 @@ public VersionNumber version() {
      * @since 1.5
      */
     public String mainClass() {
-        if (mainClass == null) {
-            throw new IllegalStateException("The mainClass variable has to be set.");
-        }
         return mainClass;
     }
 
+    /**
+     * Returns the project's module.
+     *
+     * @since 2.1
+     */
+    public String module() {
+        return module;
+    }
+
     /**
      * Returns the list of repositories for this project.
      * <p>
@@ -1520,7 +1533,14 @@ public String uberJarFileName() {
      * @since 1.5
      */
     public String uberJarMainClass() {
-        return Objects.requireNonNullElseGet(uberJarMainClass, this::mainClass);
+        if (uberJarMainClass != null) {
+            return uberJarMainClass;
+        }
+        if (mainClass() != null) {
+            return mainClass();
+        }
+
+        throw new IllegalStateException("The mainClass variable has to be set.");
     }
 
     /**

src/main/java/rife/bld/operations/AbstractProcessOperation.java

@@ -29,6 +29,7 @@ public abstract class AbstractProcessOperation<T extends AbstractProcessOperatio
     protected final List<String> classpath_ = new ArrayList<>();
     protected final List<String> modulePath_ = new ArrayList<>();
     protected String mainClass_;
+    protected String module_;
     protected Function<String, Boolean> outputProcessor_;
     protected Function<String, Boolean> errorProcessor_;
     protected Process process_;
@@ -252,6 +253,18 @@ public T mainClass(String name) {
         return (T) this;
     }
 
+    /**
+     * Provides the module to launch with the java tool.
+     *
+     * @param name the module to launch
+     * @return this operation instance
+     * @since 2.1
+     */
+    public T module(String name) {
+        module_ = name;
+        return (T) this;
+    }
+
     /**
      * Provides the processor that will be used to handle the process output.
      * <p>
@@ -346,6 +359,16 @@ public String mainClass() {
         return mainClass_;
     }
 
+    /**
+     * Retrieves the module to launch with the java tool.
+     *
+     * @return the module to launch
+     * @since 2.1
+     */
+    public String module() {
+        return module_;
+    }
+
     /**
      * Retrieves the processor that is used to handle the process output.
      *