Suport command line paramenters for incremental build (#958)

Author: zhaoyunxing92

src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java

@@ -623,7 +623,7 @@ final Charset charset() {
      * @see #createMissingPackageInfoClass
      * @since 4.0.0
      */
-    @Parameter // The default values are implemented in `incrementalCompilationConfiguration()`.
+    @Parameter(property = "maven.compiler.incrementalCompilation")
     protected String incrementalCompilation;
 
     /**
@@ -679,7 +679,7 @@ final EnumSet<IncrementalBuild.Aspect> incrementalCompilationConfiguration() {
      * @see #incrementalCompilation
      * @since 3.1
      */
-    @Parameter
+    @Parameter(defaultValue = "class,jar")
     protected List<String> fileExtensions;
 
     /**
@@ -1074,19 +1074,18 @@ String moduleOfPreviousExecution() throws IOException {
      * @throws IOException if this method needed to read a module descriptor and failed
      */
     boolean hasModuleDeclaration(final List<SourceDirectory> roots) throws IOException {
-        switch (project.getPackaging().type().id()) {
-            case Type.CLASSPATH_JAR:
-                return false;
-            case Type.MODULAR_JAR:
-                return true;
-            default:
+        return switch (project.getPackaging().type().id()) {
+            case Type.CLASSPATH_JAR -> false;
+            case Type.MODULAR_JAR -> true;
+            default -> {
                 for (SourceDirectory root : roots) {
                     if (root.getModuleInfo().isPresent()) {
-                        return true;
+                        yield true;
                     }
                 }
-                return false;
-        }
+                yield false;
+            }
+        };
     }
 
     /**

src/main/java/org/apache/maven/plugin/compiler/ToolExecutor.java

@@ -323,9 +323,6 @@ public boolean applyIncrementalBuild(final AbstractCompilerMojo mojo, final Opti
             }
             if (checkDepends && causeOfRebuild == null) {
                 List<String> fileExtensions = mojo.fileExtensions;
-                if (fileExtensions == null || fileExtensions.isEmpty()) {
-                    fileExtensions = List.of("class", "jar");
-                }
                 causeOfRebuild = incrementalBuild.dependencyChanges(dependencies.values(), fileExtensions);
             }
             if (checkOptions && causeOfRebuild == null) {