/*
 * 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.
 */
/*
 * ResultsDataSerializabilityJUnitTest.java JUnit based test
 *
 * Created on March 8, 2007
 */

package org.apache.geode.cache.query.functional;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.util.ArrayList;
import java.util.List;

import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import org.apache.geode.DataSerializable;
import org.apache.geode.DataSerializer;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.query.CacheUtils;
import org.apache.geode.cache.query.Query;
import org.apache.geode.cache.query.SelectResults;
import org.apache.geode.cache.query.data.Portfolio;
import org.apache.geode.cache.query.internal.ResultsCollectionWrapper;
import org.apache.geode.cache.query.internal.ResultsSet;
import org.apache.geode.cache.query.internal.SortedResultSet;
import org.apache.geode.cache.query.internal.SortedStructSet;
import org.apache.geode.cache.query.internal.StructImpl;
import org.apache.geode.cache.query.internal.StructSet;
import org.apache.geode.cache.query.internal.Undefined;
import org.apache.geode.cache.query.internal.types.CollectionTypeImpl;
import org.apache.geode.cache.query.internal.types.MapTypeImpl;
import org.apache.geode.cache.query.internal.types.ObjectTypeImpl;
import org.apache.geode.cache.query.internal.types.StructTypeImpl;
import org.apache.geode.internal.DataSerializableFixedID;
import org.apache.geode.test.junit.categories.OQLQueryTest;

/**
 * Test whether query results are DataSerializable
 *
 */
@Category({OQLQueryTest.class})
public class ResultsDataSerializabilityJUnitTest {

  @Before
  public void setUp() throws java.lang.Exception {
    CacheUtils.startCache();
  }

  @After
  public void tearDown() throws java.lang.Exception {
    CacheUtils.closeCache();
  }

  /*
   * In the absence of some kind of hook into the DataSerializer, just test to see if the known
   * implementation classes that are part of query results implement the DataSerializable interface
   */
  @Test
  public void testImplementsDataSerializable() throws Exception {
    Class[] classes = new Class[] {SortedResultSet.class, ResultsCollectionWrapper.class,
        ResultsSet.class, SortedStructSet.class, StructImpl.class, StructSet.class, Undefined.class,
        // QRegion.class, // QRegions remain unserializable
        CollectionTypeImpl.class, MapTypeImpl.class, ObjectTypeImpl.class, StructTypeImpl.class,};

    List list = new ArrayList();
    for (int i = 0; i < classes.length; i++) {
      Class nextClass = classes[i];
      if (!DataSerializable.class.isAssignableFrom(nextClass)) {
        if (!DataSerializableFixedID.class.isAssignableFrom(nextClass)) {
          list.add(nextClass.getName());
        }
      }
    }

    assertTrue(list + " are not DataSerializable", list.isEmpty());
  }

  // For locally executed queries, ResultsCollectionPdxDeserializerWrapper is
  // returned which is not required to be DSFID as it is not sent over the
  // network. Hence a dunit test is required for testing this functionality.

  /* test DataSerializability of a simple query result */
  @Ignore
  @Test
  public void testDataSerializability() throws Exception {

    Region region = CacheUtils.createRegion("Portfolios", Portfolio.class);
    for (int i = 0; i < 10000; i++) {
      region.put(i + "", new Portfolio(i));
    }

    String queryStr = "SELECT DISTINCT * FROM /Portfolios";
    Query q = CacheUtils.getQueryService().newQuery(queryStr);

    SelectResults res1 = (SelectResults) q.execute();

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream out = new DataOutputStream(baos);
    DataSerializer.writeObject(res1, out, false); // false prevents Java serialization
    out.close();

    DataInputStream in = new DataInputStream(new ByteArrayInputStream(baos.toByteArray()));
    SelectResults res2 = (SelectResults) DataSerializer.readObject(in);
    in.close();

    assertEquals(res2.size(), res1.size());
  }

}