Added support for generating koltin source file.

src/main/java/net/thauvin/erik/semver/Constants.java

@@ -43,62 +43,58 @@ public final class Constants {
      * The default class name.
      */
     public static final String DEFAULT_CLASS_NAME = "GeneratedVersion";
-
+    /**
+     * The default java type.
+     **/
+    public static final String DEFAULT_JAVA_TYPE = "java";
     /**
      * The default major version.
      */
     public static final int DEFAULT_MAJOR = 1;
-
     /**
      * The default minor version.
      */
     public static final int DEFAULT_MINOR = 0;
-
     /**
      * The default patch version.
      */
     public static final int DEFAULT_PATCH = 0;
-
     /**
      * The default Velocity template.
      */
     public static final String DEFAULT_TEMPLATE = "version.vm";
-
     /**
      * The empty string.
      */
     public static final String EMPTY = "";
-
     /**
      * The build metadata property key.
      */
     public static final String KEY_VERSION_BUILDMETA = "version.buildmeta";
-
     /**
      * The major version property key.
      */
     public static final String KEY_VERSION_MAJOR = "version.major";
-
     /**
      * The minor version property key.
      */
     public static final String KEY_VERSION_MINOR = "version.minor";
-
     /**
      * The patch version property key.
      */
     public static final String KEY_VERSION_PATCH = "version.patch";
-
     /**
      * The pre-release version property key.
      */
     public static final String KEY_VERSION_PRERELEASE = "version.prerelease";
-
     /**
      * The project property key.
      */
     public static final String KEY_VERSION_PROJECT = "version.project";
-
+    /**
+     * The kotlin type.
+     */
+    public static final String KOTLIN_TYPE = "kt";
     /**
      * The velocity properties name.
      */

src/main/java/net/thauvin/erik/semver/Version.java

@@ -75,4 +75,6 @@ public @interface Version {
     String properties() default Constants.EMPTY;
 
     String template() default Constants.DEFAULT_TEMPLATE;
+
+    String type() default Constants.DEFAULT_JAVA_TYPE;
 }

src/main/java/net/thauvin/erik/semver/VersionProcessor.java

@@ -42,7 +42,8 @@ import javax.lang.model.element.ElementKind;
 import javax.lang.model.element.PackageElement;
 import javax.lang.model.element.TypeElement;
 import javax.tools.Diagnostic;
-import javax.tools.JavaFileObject;
+import javax.tools.FileObject;
+import javax.tools.StandardLocation;
 import java.io.*;
 import java.net.URL;
 import java.util.HashSet;
@@ -161,7 +162,8 @@ public class VersionProcessor extends AbstractProcessor {
                     try {
                         final VersionInfo versionInfo = findValues(version);
                         note("Found version: " + versionInfo.getVersion());
-                        writeTemplate(packageElement.getQualifiedName().toString(),
+                        writeTemplate(version.type(),
+                                packageElement.getQualifiedName().toString(),
                                 version.className(),
                                 versionInfo,
                                 version.template());
@@ -178,7 +180,8 @@ public class VersionProcessor extends AbstractProcessor {
         log(Diagnostic.Kind.WARNING, s);
     }
 
-    private void writeTemplate(final String packageName,
+    private void writeTemplate(final String type,
+                               final String packageName,
                                final String className,
                                final VersionInfo versionInfo,
                                final String template)
@@ -207,7 +210,14 @@ public class VersionProcessor extends AbstractProcessor {
 
             note("Loaded template: " + vt.getName());
 
-            final JavaFileObject jfo = filer.createSourceFile(packageName + '.' + className);
+            final FileObject jfo;
+            if (type.equalsIgnoreCase(Constants.KOTLIN_TYPE)) {
+                jfo = filer.createResource(StandardLocation.SOURCE_OUTPUT, packageName,
+                        className + '.' + type);
+            } else {
+                jfo = filer.createSourceFile(packageName + '.' + className);
+            }
+            
             try (final Writer writer = jfo.openWriter()) {
                 vt.merge(vc, writer);
             }

src/main/resources/version.vm

@@ -28,6 +28,9 @@ import java.util.Date;
  *         Annotation Processor</a>
  */
 public final class ${className} {
+	private final static String DEFAULT_PRERELEASE_PREFIX = "-";
+	private final static string DEFAULT_BUILDMETA_PREFIX = "+";
+
     private final static String buildmeta = "${buildmeta}";
     private final static Date date = new Date(${epoch}L);
     private final static int major = ${major};
@@ -86,7 +89,7 @@ public final class ${className} {
         return Integer.toString(getMajor()) + '.'
                 + Integer.toString(getMinor()) + '.'
                 + Integer.toString(getPatch())
-                + getPreRelease(true) + getBuildMetadata(true);
+                + getPreReleaseWithPrefix + getBuildMetadataWithPrefix;
     }
 
     /**
@@ -119,46 +122,10 @@ public final class ${className} {
     /**
      * Returns the pre-release version.
      *
-     * @param isHyphen Prepend a hyphen, if <code>true</code>.
+     * @return The pre-release version, if any
-     * @return The pre-release version, if any.
      */
-    public static String getPreRelease(final boolean isHyphen) {
+    public static int getPreRelease() {
-        if (prerelease.length() > 0) {
+        return prerelease;
-            if (isHyphen) {
-                return '-' + prerelease;
-            } else {
-                return prerelease;
-            }
-        }
-
-        return "";
-    }
-
-    /**
-     * Returns the pre-release version.
-     *
-     * @return The pre-release version, if any.
-     */
-    public static String getPreRelease() {
-        return getPreRelease(false);
-    }
-
-    /**
-     * Returns the build metadata.
-     *
-     * @param isPlus Prepend a plus sign, if <code>true</code>.
-     * @return The build metadata, if any.
-     */
-    public static String getBuildMetadata(final boolean isPlus) {
-        if (buildmeta.length() > 0) {
-            if (isPlus) {
-                return '+' + buildmeta;
-            } else {
-                return buildmeta;
-            }
-        }
-
-        return "";
     }
 
     /**
@@ -167,6 +134,53 @@ public final class ${className} {
      * @return The build metadata, if any.
      */
     public static String getBuildMetadata() {
-        return getBuildMetadata(false);
+        return buildmeta;
+    }
+
+    /**
+     * Returns the pre-release version with default prefix.
+     *
+     * @return The pre-release version, if any.
+     */
+    public static String getPreReleaseWithPrefix() {
+        return getPreReleaseWithPrefix(DEFAULT_PRERELEASE_PREFIX);
+    }
+
+    /**
+     * Returns the pre-release version.
+     *
+     * @param prefix The refix to prepend.
+     * @return The pre-release version, if any.
+     */
+    public static String getPreReleaseWithPrefix(final String prefix) {
+        if (prerelease.length() > 0 && prefix.length() > 0) {
+            return prefix + prerelease;
+        } else {
+            return prerelease;
+        }
+    }
+
+    /**
+     * Returns the build metadata with default prefix.
+     *
+     * @param prefix The prefix to prepend.
+     * @return The build metadata, if any.
+     */
+    public static String getBuildMetadataWithPrefix() {
+    	return getBuildMetadataWithPrefix(DEFAULT_PRERELEASE_PREFIX);
+    }
+
+    /**
+     * Returns the build metadata.
+     *
+     * @param prefix Prefix to prepend.
+     * @return The build metadata, if any.
+     */
+    public static String getBuildMetadataWithPrefix(final String prefix) {
+        if (buildmeta.length() > 0 && prefix.length() > 0) {
+            return prefix + buildmeta;
+        } else {
+            return buildmeta;
+        }
     }
 }