[MPMD-264] - Add rule priority to HTML report
diff --git a/src/main/java/org/apache/maven/plugins/pmd/PmdReport.java b/src/main/java/org/apache/maven/plugins/pmd/PmdReport.java
index 6bc8d42..caab072 100644
--- a/src/main/java/org/apache/maven/plugins/pmd/PmdReport.java
+++ b/src/main/java/org/apache/maven/plugins/pmd/PmdReport.java
@@ -218,6 +218,14 @@
     private boolean renderProcessingErrors = true;
 
     /**
+     * Also render the rule priority into the HTML report.
+     *
+     * @since 3.10.0
+     */
+    @Parameter( property = "pmd.renderRuleViolationPriority", defaultValue = "true" )
+    private boolean renderRuleViolationPriority = true;
+
+    /**
      * {@inheritDoc}
      */
     public String getName( Locale locale )
@@ -524,6 +532,7 @@
     {
         Sink sink = getSink();
         PmdReportGenerator doxiaRenderer = new PmdReportGenerator( getLog(), sink, getBundle( locale ), aggregate );
+        doxiaRenderer.setRenderRuleViolationPriority( renderRuleViolationPriority );
         doxiaRenderer.setFiles( filesToProcess );
         doxiaRenderer.setViolations( renderer.getViolations() );
         if ( renderProcessingErrors )
diff --git a/src/main/java/org/apache/maven/plugins/pmd/PmdReportGenerator.java b/src/main/java/org/apache/maven/plugins/pmd/PmdReportGenerator.java
index f13d7c2..7284583 100644
--- a/src/main/java/org/apache/maven/plugins/pmd/PmdReportGenerator.java
+++ b/src/main/java/org/apache/maven/plugins/pmd/PmdReportGenerator.java
@@ -60,6 +60,8 @@
 
     private boolean aggregate;
 
+    private boolean renderRuleViolationPriority;
+
     // The number of erroneous files
     private int fileCount = 0;
 
@@ -159,6 +161,12 @@
         sink.tableHeaderCell();
         sink.text( bundle.getString( "report.pmd.column.violation" ) );
         sink.tableHeaderCell_();
+        if ( this.renderRuleViolationPriority )
+        {
+            sink.tableHeaderCell();
+            sink.text( bundle.getString( "report.pmd.column.priority" ) );
+            sink.tableHeaderCell_();
+        }
         sink.tableHeaderCell();
         sink.text( bundle.getString( "report.pmd.column.line" ) );
         sink.tableHeaderCell_();
@@ -177,6 +185,14 @@
         sink.tableCell();
         sink.text( ruleViolation.getDescription() );
         sink.tableCell_();
+
+        if ( this.renderRuleViolationPriority )
+        {
+            sink.tableCell();
+            sink.text( String.valueOf( ruleViolation.getRule().getPriority().getPriority() ) );
+            sink.tableCell_();
+        }
+
         sink.tableCell();
 
         int beginLine = ruleViolation.getBeginLine();
@@ -412,4 +428,9 @@
     {
         this.files = files;
     }
+
+    public void setRenderRuleViolationPriority( boolean renderRuleViolationPriority )
+    {
+        this.renderRuleViolationPriority = renderRuleViolationPriority;
+    }
 }
diff --git a/src/main/resources/pmd-report.properties b/src/main/resources/pmd-report.properties
index 031ceef..6b2cd01 100644
--- a/src/main/resources/pmd-report.properties
+++ b/src/main/resources/pmd-report.properties
@@ -19,6 +19,7 @@
 report.pmd.description=Verification of coding rules.
 report.pmd.title=PMD Results
 report.pmd.column.violation=Violation
+report.pmd.column.priority=Priority
 report.pmd.column.line=Line
 report.pmd.pmdlink=The following document contains the results of
 report.pmd.files=Files
diff --git a/src/main/resources/pmd-report_de.properties b/src/main/resources/pmd-report_de.properties
index 36a7cd7..de8ee93 100644
--- a/src/main/resources/pmd-report_de.properties
+++ b/src/main/resources/pmd-report_de.properties
@@ -19,6 +19,7 @@
 report.pmd.description=Verifikation von Code-Richtlinien.
 report.pmd.title=PMD Ergebnisse
 report.pmd.column.violation=Versto\u00df
+report.pmd.column.priority=Priorit\u00e4t
 report.pmd.column.line=Zeile
 report.pmd.pmdlink=Dieses Dokument enth\u00e4lt die Ergebnisse von
 report.pmd.files=Dateien
diff --git a/src/test/java/org/apache/maven/plugins/pmd/PmdReportTest.java b/src/test/java/org/apache/maven/plugins/pmd/PmdReportTest.java
index 5fd1356..eb2fa23 100644
--- a/src/test/java/org/apache/maven/plugins/pmd/PmdReportTest.java
+++ b/src/test/java/org/apache/maven/plugins/pmd/PmdReportTest.java
@@ -52,6 +52,7 @@
         throws Exception
     {
         super.setUp();
+        Locale.setDefault( Locale.ENGLISH );
         FileUtils.deleteDirectory( new File( getBasedir(), "target/test/unit" ) );
     }
 
@@ -86,6 +87,32 @@
         assertTrue( str.contains( "/xref/def/configuration/App.html#L31" ) );
 
         assertTrue( str.contains( "/xref/def/configuration/AppSample.html#L45" ) );
+
+        // check if there's a priority column
+        assertTrue( str.contains( "Priority" ) );
+    }
+
+    public void testDefaultConfigurationNotRenderRuleViolationPriority()
+            throws Exception
+    {
+        FileUtils.copyDirectoryStructure( new File( getBasedir(),
+                                                    "src/test/resources/unit/default-configuration/jxr-files" ),
+                                          new File( getBasedir(), "target/test/unit/default-configuration/target/site" ) );
+
+        File testPom =
+            new File( getBasedir(),
+                      "src/test/resources/unit/default-configuration/pmd-report-not-render-rule-priority-plugin-config.xml" );
+        PmdReport mojo = (PmdReport) lookupMojo( "pmd", testPom );
+        mojo.execute();
+
+        File generatedFile = new File( getBasedir(), "target/test/unit/default-configuration/target/site/pmd.html" );
+        renderer( mojo, generatedFile );
+        assertTrue( FileUtils.fileExists( generatedFile.getAbsolutePath() ) );
+
+        String str = readFile( generatedFile );
+
+        // check that there's no priority column
+        assertFalse( str.contains( "Priority" ) );
     }
 
     public void testDefaultConfigurationWithAnalysisCache()
diff --git a/src/test/resources/unit/default-configuration/pmd-report-not-render-rule-priority-plugin-config.xml b/src/test/resources/unit/default-configuration/pmd-report-not-render-rule-priority-plugin-config.xml
new file mode 100644
index 0000000..9afeda3
--- /dev/null
+++ b/src/test/resources/unit/default-configuration/pmd-report-not-render-rule-priority-plugin-config.xml
@@ -0,0 +1,68 @@
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>def.configuration</groupId>
+  <artifactId>default-configuration</artifactId>
+  <packaging>jar</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <inceptionYear>2006</inceptionYear>
+  <name>Maven PMD Plugin Default Configuration Test</name>
+  <url>http://maven.apache.org</url>
+  <build>
+    <finalName>default-configuration</finalName>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-pmd-plugin</artifactId>
+        <configuration>
+          <project implementation="org.apache.maven.plugins.pmd.stubs.DefaultConfigurationMavenProjectStub"/>
+          <outputDirectory>${basedir}/target/test/unit/default-configuration/target/site</outputDirectory>
+          <targetDirectory>${basedir}/target/test/unit/default-configuration/target</targetDirectory>
+          <format>xml</format>
+          <linkXRef>true</linkXRef>
+          <xrefLocation>${basedir}/target/test/unit/default-configuration/target/site/xref</xrefLocation>
+          <sourceEncoding>UTF-8</sourceEncoding>
+          
+          <compileSourceRoots>
+            <compileSourceRoot>${basedir}/src/test/resources/unit/default-configuration/</compileSourceRoot>
+          </compileSourceRoots>
+
+          <renderRuleViolationPriority>false</renderRuleViolationPriority>
+        </configuration>
+        <dependencies>
+          <dependency>
+            <groupId>pmd</groupId>
+            <artifactId>pmd</artifactId>
+            <version>3.6</version>
+          </dependency>
+        </dependencies>
+      </plugin>
+    </plugins>
+  </build>
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jxr-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </reporting>
+</project>