querybeans: #3374 - Add copy() method to TQRootBean

ebean-querybean/src/main/java/io/ebean/typequery/TQRootBean.java

@@ -153,6 +153,11 @@ public abstract class TQRootBean<T, R> {
     return ((SpiFetchGroupQuery<T>) query()).buildFetchGroup();
   }
 
+  /**
+   * Return a copy of the query bean.
+   */
+  public abstract R copy();
+
   /**
    * Return the underlying query.
    * <p>

kotlin-querybean-generator/src/main/java/io/ebean/querybean/generator/KotlinLangAdapter.java

@@ -88,7 +88,7 @@ class KotlinLangAdapter implements LangAdapter {
 
     writer.eol();
     writer.append("  /** Return a copy of the query. */").eol();
-    writer.append("  fun copy() : Q%s {", shortName).eol();
+    writer.append("  override fun copy() : Q%s {", shortName).eol();
     writer.append("    return Q%s(query().copy())", shortName).eol();
     writer.append("  }").eol();
     writer.eol();

querybean-generator/src/main/java/io/ebean/querybean/generator/SimpleQueryBeanWriter.java

@@ -197,6 +197,7 @@ class SimpleQueryBeanWriter {
 
     writer.eol();
     writer.append("  /** Return a copy of the query bean. */").eol();
+    writer.append("  @Override").eol();
     writer.append("  public Q%s copy() {", shortName).eol();
     writer.append("    return new Q%s(query().copy());", shortName).eol();
     writer.append("  }").eol();