[MJAVADOC-799] Remove inconsistent AbstractFixJavadocMojo#defaultVersion default value

The current default value has no use anymore.

This closes #295

Author: Marcono1234

src/it/projects/javadoc-fix/verify.bsh

@@ -60,13 +60,13 @@ try
     content = FileUtils.fileRead( javaFile, "UTF-8" );
 
     assertContains( content, " * <p>ClassWithNoJavadoc class.</p>" );
-    assertContains( content, " * @version $Id: $" );
     assertContains( content, " * @since 1.0" );
     assertContains( content, "     * <p>main.</p>" );
     assertContains( content, "     * @param args an array of {@link java.lang.String} objects" );
     // private sampleMethod
     assertNotContains( content, "     * <p>sampleMethod.</p>" );
     assertNotContains( content, "     * @param str a {@link java.lang.String} object" );
+    assertNotContains( content, " * @version " );
 
     javaFile = new File( basedir, "/src/main/java/fix/test/ClassWithJavadoc.java" );
     content = FileUtils.fileRead( javaFile, "UTF-8" );
@@ -93,21 +93,21 @@ try
     content = FileUtils.fileRead( javaFile, "UTF-8" );
 
     assertContains( content, " * <p>InterfaceWithNoJavadoc interface.</p>" );
-    assertContains( content, " * @version $Id: $" );
     assertContains( content, " * @since 1.0" );
     assertContains( content, "    /** Constant <code>MY_STRING_CONSTANT=\"value\"</code> */" );
     assertContains( content, "     * <p>method.</p>" );
     assertContains( content, "     * @param aString a {@link java.lang.String} object" );
+    assertNotContains( content, " * @version " );
 
     javaFile = new File( basedir, "/src/main/java/fix/test/InterfaceWithJavadoc.java" );
     content = FileUtils.fileRead( javaFile, "UTF-8" );
 
     assertContains( content, " * Some Javadoc." );
-    assertContains( content, " * @version $Id: $" );
     assertContains( content, " * @since 1.0" );
     assertContains( content, "    /** comment */" );
     assertContains( content, "     * My method" );
     assertContains( content, "     * @param aString a {@link java.lang.String} object" );
+    assertNotContains( content, " * @version " );
 
 }
 catch( Throwable e )

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

@@ -207,11 +207,6 @@ public abstract class AbstractFixJavadocMojo extends AbstractMojo {
      */
     public static final String JAVA_FILES = "**\\/*.java";
 
-    /**
-     * Default version value.
-     */
-    public static final String DEFAULT_VERSION_VALUE = "\u0024Id: \u0024Id";
-
     // ----------------------------------------------------------------------
     // Mojo components
     // ----------------------------------------------------------------------
@@ -251,13 +246,9 @@ public abstract class AbstractFixJavadocMojo extends AbstractMojo {
 
     /**
      * Default value for the Javadoc tag <code>&#64;version</code>.
-     * <br/>
-     * By default, it is <code>&#36;Id:&#36;</code>, corresponding to a
-     * <a href="http://svnbook.red-bean.com/en/1.1/ch07s02.html#svn-ch-7-sect-2.3.4">SVN keyword</a>.
-     * Refer to your SCM to use an other SCM keyword.
      */
-    @Parameter(property = "defaultVersion", defaultValue = DEFAULT_VERSION_VALUE)
-    private String defaultVersion = "\u0024Id: \u0024"; // can't use default-value="\u0024Id: \u0024"
+    @Parameter(property = "defaultVersion")
+    private String defaultVersion;
 
     /**
      * The file encoding to use when reading the source files. If the property
@@ -286,7 +277,7 @@ public abstract class AbstractFixJavadocMojo extends AbstractMojo {
      * <li>link (fix only &#64;link tag)</li>
      * </ul>
      */
-    @Parameter(property = "fixTags", defaultValue = "all")
+    @Parameter(property = "fixTags", defaultValue = FIX_TAGS_ALL)
     private String fixTags;
 
     /**
@@ -346,7 +337,7 @@ public abstract class AbstractFixJavadocMojo extends AbstractMojo {
      * </ul>
      * @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javadoc.html#options-for-javadoc">private, protected, public, package options for Javadoc</a>
      */
-    @Parameter(property = "level", defaultValue = "protected")
+    @Parameter(property = "level", defaultValue = LEVEL_PROTECTED)
     private String level;
 
     /**
@@ -2109,7 +2100,7 @@ private void appendDefaultSinceTag(final StringBuilder sb, final String indent)
      * @return true if separator has been added.
      */
     private boolean appendDefaultVersionTag(final StringBuilder sb, final String indent, boolean separatorAdded) {
-        if (!fixTag(VERSION_TAG)) {
+        if (!fixTag(VERSION_TAG) || StringUtils.isEmpty(defaultVersion)) {
             return separatorAdded;
         }
 
@@ -2127,7 +2118,7 @@ private boolean appendDefaultVersionTag(final StringBuilder sb, final String ind
      * @param indent not null
      */
     private void appendDefaultVersionTag(final StringBuilder sb, final String indent) {
-        if (!fixTag(VERSION_TAG)) {
+        if (!fixTag(VERSION_TAG) || StringUtils.isEmpty(defaultVersion)) {
             return;
         }
 

src/test/resources/unit/fix-test/expected/src/main/java/fix/test/ClassWithJavadoc.java

@@ -23,7 +23,6 @@
  * To add default class tags.
  *
  * @author <a href="mailto:vsiveton@apache.org">vsiveton@apache.org</a>
- * @version $Id: $
  */
 @SuppressWarnings("SameReturnValue")
 public class ClassWithJavadoc

src/test/resources/unit/fix-test/expected/src/main/java/fix/test/ClassWithNoJavadoc.java

@@ -25,7 +25,6 @@
  * <p>ClassWithNoJavadoc class.</p>
  *
  * @author <a href="mailto:vsiveton@apache.org">vsiveton@apache.org</a>
- * @version $Id: $
  */
 @SuppressWarnings("SameReturnValue")
 public class ClassWithNoJavadoc

src/test/resources/unit/fix-test/expected/src/main/java/fix/test/InterfaceWithJavadoc.java

@@ -23,7 +23,6 @@
  * To add default interface tags.
  *
  * @author <a href="mailto:vsiveton@apache.org">vsiveton@apache.org</a>
- * @version $Id: $
  */
 public interface InterfaceWithJavadoc
 {

src/test/resources/unit/fix-test/expected/src/main/java/fix/test/InterfaceWithNoJavadoc.java

@@ -23,7 +23,6 @@
  * <p>InterfaceWithNoJavadoc interface.</p>
  *
  * @author <a href="mailto:vsiveton@apache.org">vsiveton@apache.org</a>
- * @version $Id: $
  */
 public interface InterfaceWithNoJavadoc
 {