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/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2017 by Hitachi Vantara : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * Licensed 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.pentaho.di.repository;

/**
 * This singleton keeps the location of a repository import.
 *
 * NOT THREAD SAFE, ONLY ONE IMPORT AT A TIME PLEASE!!
 *
 * @author matt
 *
 */
public class RepositoryImportLocation {

  private static RepositoryImportLocation location;

  private RepositoryDirectoryInterface repositoryDirectory;

  private RepositoryImportLocation() {
    repositoryDirectory = null;
  }

  /**
   * Get the repository import location. WARNING: NOT THREAD SAFE, ONLY ONE IMPORT AT A TIME PLEASE!!
   *
   * @return the import location in the repository in the form of a repository directory. If no import location is set,
   *         null is returned.
   */
  public static RepositoryDirectoryInterface getRepositoryImportLocation() {
    if ( location == null ) {
      location = new RepositoryImportLocation();
    }
    return location.repositoryDirectory;
  }

  /**
   * Sets the repository import location. WARNING: NOT THREAD SAFE, ONLY ONE IMPORT AT A TIME PLEASE!!
   *
   * ALSO MAKE SURE TO CLEAR THE IMPORT DIRECTORY AFTER IMPORT!! (sorry for shouting)
   *
   * @param repositoryDirectory
   *          the import location in the repository in the form of a repository directory.
   *
   */
  public static void setRepositoryImportLocation( RepositoryDirectoryInterface repositoryDirectory ) {
    if ( location == null ) {
      location = new RepositoryImportLocation();
    }
    location.repositoryDirectory = repositoryDirectory;
  }
}