content: /*
   *  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.
   */
  package org.apache.causeway.persistence.jdo.provider.persistence;
  
  @FunctionalInterface
  public interface HasPersistenceManager {
  
      // -- INTERFACE
  
      javax.jdo.PersistenceManager getPersistenceManager();
  
      // -- QUERY SHURTCUTS
  
      /**
       * Not type safe. For type-safe queries use <br/><br/> {@code pm().newNamedQuery(cls, queryName)}
       * @param cls
       * @param queryName
       */
      default <T> javax.jdo.Query<T> newJdoNamedQuery(Class<T> cls, String queryName){
          return getPersistenceManager().newNamedQuery(cls, queryName);
      }
  
      /**
       * Not type safe. For type-safe queries use <br/><br/> {@code pm().newQuery(cls, queryName)}
       * @param cls
       */
      default <T> javax.jdo.Query<T> newJdoQuery(Class<T> cls){
          return getPersistenceManager().newQuery(cls);
      }
  
      /**
       * Not type safe. For type-safe queries use <br/><br/> {@code pm().newQuery(cls, filter)}
       * @param cls
       * @param filter
       */
      default <T> javax.jdo.Query<T> newJdoQuery(Class<T> cls, String filter){
          return getPersistenceManager().newQuery(cls, filter);
      }
  
      // -- TX SHURTCUTS
  
      /**
       * to tell the underlying object store to start a transaction.
       */
      default void startTransaction() {
          final javax.jdo.Transaction transaction = getPersistenceManager().currentTransaction();
          if (transaction.isActive()) {
              throw new IllegalStateException("Transaction already active");
          }
          transaction.begin();
      }
  
      /**
       * to tell the underlying object store to commit a transaction.
       */
      default void endTransaction() {
          final javax.jdo.Transaction transaction = getPersistenceManager().currentTransaction();
          if (transaction.isActive()) {
              transaction.commit();
          }
      }
  
      /**
       * to tell the underlying object store to abort a transaction.
       */
      default void abortTransaction() {
          final javax.jdo.Transaction transaction = getPersistenceManager().currentTransaction();
          if (transaction.isActive()) {
              transaction.rollback();
          }
      }
  
      /**
       * to tell the underlying object store to flush a transaction.
       */
      default void flushTransaction() {
          final javax.jdo.Transaction transaction = getPersistenceManager().currentTransaction();
          if (transaction.isActive()) {
              transaction.getPersistenceManager().flush();
          }
      }
  }
  