/*
 * 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.hadoop.hive.metastore.messaging.json;

import static org.junit.Assert.assertEquals;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.hadoop.hive.metastore.annotation.MetastoreUnitTest;
import org.json.JSONException;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.skyscreamer.jsonassert.JSONAssert;

import com.fasterxml.jackson.annotation.JsonProperty;

@Category(MetastoreUnitTest.class)
public class TestJSONMessageDeserializer {

  public static class MyClass {
    @JsonProperty
    private int a;
    @JsonProperty
    private Map<String, String> map;
    private long l;
    private String shouldNotSerialize = "shouldNotSerialize";

    //for jackson to instantiate
    MyClass() {
    }

    MyClass(int a, Map<String, String> map, long l) {
      this.a = a;
      this.map = map;
      this.l = l;
    }

    @JsonProperty
    long getL() {
      return l;
    }

    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }

      MyClass myClass = (MyClass) o;

      if (a != myClass.a) {
        return false;
      }
      if (l != myClass.l) {
        return false;
      }
      if (!map.equals(myClass.map)) {
        return false;
      }
      return shouldNotSerialize.equals(myClass.shouldNotSerialize);
    }

    @Override
    public int hashCode() {
      int result = a;
      result = 31 * result + map.hashCode();
      result = 31 * result + (int) (l ^ (l >>> 32));
      result = 31 * result + shouldNotSerialize.hashCode();
      return result;
    }
  }

  @Test
  public void shouldNotSerializePropertiesNotAnnotated() throws IOException, JSONException {
    MyClass obj = new MyClass(Integer.MAX_VALUE, new HashMap<String, String>() {{
      put("a", "a");
      put("b", "b");
    }}, Long.MAX_VALUE);
    String json = JSONMessageDeserializer.mapper.writeValueAsString(obj);
    JSONAssert.assertEquals(
        "{\"a\":2147483647,\"map\":{\"b\":\"b\",\"a\":\"a\"},\"l\":9223372036854775807}", json,
        false);
  }

  @Test
  public void shouldDeserializeJsonStringToObject() throws IOException {
    String json = "{\"a\":47,\"map\":{\"a\":\"a\",\"b\":\"a value for b\"},\"l\":98}";
    MyClass actual = JSONMessageDeserializer.mapper.readValue(json, MyClass.class);
    MyClass expected = new MyClass(47, new HashMap<String, String>() {{
      put("a", "a");
      put("b", "a value for b");
    }}, 98L);
    assertEquals(expected, actual);
  }

  @Test
  public void testDeserializeControlCharacter() throws IOException {
    String json = "{\"a\":47,\"map\":{\"a\":\"a\",\"b\":\"a value \n for b\"},\"l\":98}";
    MyClass actual = JSONMessageDeserializer.mapper.readValue(json, MyClass.class);
    MyClass expected = new MyClass(47, new HashMap<String, String>() {{
      put("a", "a");
      put("b", "a value \n for b");
    }}, 98L);
    assertEquals(expected, actual);
  }
}