[MJAVADOC-723] Upgrade Maven Reporting API to 3.1.1/Complete with Mav…

…en Reporting Impl 3.2.0

This not only upgrades to Maven Reporting API 3.1.1, but also logically
completes this plugin with bits from Maven Reporting Impl 3.2.0 because
we cannot inherit from AbstractMavenReport since Java does not support
multiple inheritance. It should now behave as if using m-r-impl.

Co-authored-by: Piotrek Żygieło <pzygielo@users.noreply.github.com>

This closes #158

pom.xml

@@ -75,7 +75,7 @@ under the License.
     <plexus-java.version>1.1.0</plexus-java.version>
     <jetty.version>9.4.43.v20210629</jetty.version>
     <!-- for ITs -->
-    <sitePluginVersion>3.11.0</sitePluginVersion>
+    <sitePluginVersion>3.12.1</sitePluginVersion>
     <projectInfoReportsPluginVersion>3.2.2</projectInfoReportsPluginVersion>
     <project.build.outputTimestamp>2022-04-17T07:43:18Z</project.build.outputTimestamp>
     <slf4j.version>1.7.32</slf4j.version>
@@ -207,7 +207,7 @@ under the License.
     <dependency>
       <groupId>org.apache.maven.reporting</groupId>
       <artifactId>maven-reporting-api</artifactId>
-      <version>3.1.0</version>
+      <version>3.1.1</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>

src/main/java/org/apache/maven/plugins/javadoc/JavadocReport.java

@@ -28,6 +28,7 @@
 import java.util.stream.Collectors;
 
 import org.apache.maven.doxia.sink.Sink;
+import org.apache.maven.doxia.sink.SinkFactory;
 import org.apache.maven.doxia.siterenderer.RenderingContext;
 import org.apache.maven.doxia.siterenderer.sink.SiteRendererSink;
 import org.apache.maven.plugin.MojoExecutionException;
@@ -37,7 +38,7 @@
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.annotations.ResolutionScope;
-import org.apache.maven.reporting.MavenReport;
+import org.apache.maven.reporting.MavenMultiPageReport;
 import org.apache.maven.reporting.MavenReportException;
 import org.codehaus.plexus.util.StringUtils;
 
@@ -55,7 +56,7 @@
 @Execute( phase = LifecyclePhase.GENERATE_SOURCES )
 public class JavadocReport
     extends AbstractJavadocMojo
-    implements MavenReport
+    implements MavenMultiPageReport
 {
     // ----------------------------------------------------------------------
     // Report Mojo Parameters
@@ -125,8 +126,22 @@ public String getDescription( Locale locale )
 
     /** {@inheritDoc} */
     @Override
+    public void generate( org.codehaus.doxia.sink.Sink sink, Locale locale )
+        throws MavenReportException
+    {
+        generate( sink, null, locale );
+    }
+
     public void generate( Sink sink, Locale locale )
         throws MavenReportException
+    {
+        generate( sink, null, locale );
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public void generate( Sink sink, SinkFactory sinkFactory, Locale locale )
+        throws MavenReportException
     {
         outputDirectory = getReportOutputDirectory();
 
@@ -316,12 +331,21 @@ public void doExecute()
             return;
         }
 
+        File outputDirectory = new File( getOutputDirectory() );
+
+        String filename = getOutputName() + ".html";
+
+        Locale locale = Locale.getDefault();
+
         try
         {
-            RenderingContext context = new RenderingContext( outputDirectory, getOutputName() + ".html" );
-            SiteRendererSink sink = new SiteRendererSink( context );
-            Locale locale = Locale.getDefault();
-            generate( sink, locale );
+            // TODO Replace null with real value
+            RenderingContext docRenderingContext = new RenderingContext( outputDirectory, filename, null );
+
+            SiteRendererSink sink = new SiteRendererSink( docRenderingContext );
+
+            generate( sink, null, locale );
+
         }
         catch ( MavenReportException | RuntimeException e )
         {