/*
 * 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.jdo.tck.api.persistencemanager;

import java.util.HashSet;
import java.util.Set;
import javax.jdo.Transaction;
import org.apache.jdo.tck.pc.mylib.PCPoint;
import org.apache.jdo.tck.util.BatchTestRunner;

/**
 * <B>Title:</B> ObjectId Unique Among Instances <br>
 * <B>Keywords:</B> identity <br>
 * <B>Assertion ID:</B> A12.5.6-12. <br>
 * <B>Assertion Description: </B> Within a transaction, the <code>ObjectId</code> returned will
 * compare equal to the <code>ObjectId</code> returned by only one among all JDO instances
 * associated with the <code>PersistenceManager</code> regardless of the type of <code>ObjectId
 * </code>.
 */
public class ObjectIdUniqueAmongInstances extends PersistenceManagerTest {

  /** */
  private static final String ASSERTION_FAILED =
      "Assertion A12.5.6-12 (ObjectIdUniqueAmongInstances) failed: ";

  /**
   * The <code>main</code> is called when the class is directly executed from the command line.
   *
   * @param args The arguments passed to the program.
   */
  public static void main(String[] args) {
    BatchTestRunner.run(ObjectIdUniqueAmongInstances.class);
  }

  /** */
  public void test() {
    final int count = 1000;

    Set<PCPoint> instances = new HashSet<>(count);
    Set<Object> oids = new HashSet<>(count);

    pm = getPM();
    Transaction tx = pm.currentTransaction();
    try {
      tx.begin();

      // Construct "count" persistent instances, and save them in a
      // hashset.
      for (int i = 0; i < count; ++i) {
        PCPoint p = new PCPoint(i, count - i);
        pm.makePersistent(p);
        instances.add(p);
      }

      // For all new persistent instances, get the object ids and
      // save them in another hashset.  There should be the same
      // number if the ids  are all unique.
      for (PCPoint instance : instances) {
        oids.add(pm.getObjectId(instance));
      }

      tx.commit();
      tx = null;

      if (oids.size() != instances.size()) {
        fail(ASSERTION_FAILED, "Oids has size: " + oids.size() + "; expected: " + instances.size());
      }
    } finally {
      if ((tx != null) && tx.isActive()) tx.rollback();
    }
    pm.close();
    pm = null;
  }
}