TestJsonCodecFactory.java

/*
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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 io.airlift.json;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.reflect.TypeToken;
import org.testng.Assert;
import org.testng.annotations.Test;

import java.util.List;
import java.util.Map;

import static com.google.common.base.MoreObjects.toStringHelper;

public class TestJsonCodecFactory
{
    private JsonCodecFactory jsonCodecFactory = new JsonCodecFactory();

    @Test
    public void testJsonCodec()
            throws Exception
    {
        JsonCodec<Person> jsonCodec = jsonCodecFactory.jsonCodec(Person.class);

        Person expected = new Person().setName("dain").setRocks(true);
        String json = jsonCodec.toJson(expected);
        Person actual = jsonCodec.fromJson(json);
        Assert.assertEquals(actual, expected);
    }

    @Test
    public void testListJsonCodec()
            throws Exception
    {
        JsonCodec<List<Person>> jsonCodec = jsonCodecFactory.listJsonCodec(Person.class);

        validateListCodec(jsonCodec);
    }

    @Test
    public void testListJsonCodecFromJsonCodec()
            throws Exception
    {
        JsonCodec<List<Person>> jsonCodec = jsonCodecFactory.listJsonCodec(jsonCodecFactory.jsonCodec(Person.class));

        validateListCodec(jsonCodec);
    }

    @Test
    public void testTypeLiteralList()
            throws Exception
    {
        JsonCodec<List<Person>> jsonCodec = jsonCodecFactory.jsonCodec(new TypeToken<List<Person>>() {});

        validateListCodec(jsonCodec);
    }

    private void validateListCodec(JsonCodec<List<Person>> jsonCodec)
    {
        ImmutableList<Person> expected = ImmutableList.of(
                new Person().setName("dain").setRocks(true),
                new Person().setName("martin").setRocks(true),
                new Person().setName("mark").setRocks(true));

        String json = jsonCodec.toJson(expected);
        List<Person> actual = jsonCodec.fromJson(json);
        Assert.assertEquals(actual, expected);
    }

    @Test
    public void testMapJsonCodec()
            throws Exception
    {
        JsonCodec<Map<String, Person>> jsonCodec = jsonCodecFactory.mapJsonCodec(String.class, Person.class);

        validateMapCodec(jsonCodec);
    }

    @Test
    public void testMapJsonCodecFromJsonCodec()
            throws Exception
    {
        JsonCodec<Map<String, Person>> jsonCodec = jsonCodecFactory.mapJsonCodec(String.class, jsonCodecFactory.jsonCodec(Person.class));

        validateMapCodec(jsonCodec);
    }

    @Test
    public void testTypeLiteralMap()
            throws Exception
    {
        JsonCodec<Map<String, Person>> jsonCodec = jsonCodecFactory.jsonCodec(new TypeToken<Map<String,Person>>() {});

        validateMapCodec(jsonCodec);
    }

    private void validateMapCodec(JsonCodec<Map<String, Person>> jsonCodec)
    {
        ImmutableMap<String, Person> expected = ImmutableMap.<String, Person>builder()
                .put("dain", new Person().setName("dain").setRocks(true))
                .put("martin", new Person().setName("martin").setRocks(true))
                .put("mark", new Person().setName("mark").setRocks(true))
                .build();

        String json = jsonCodec.toJson(expected);
        Map<String, Person> actual = jsonCodec.fromJson(json);
        Assert.assertEquals(actual, expected);
    }

    public static class Person
    {
        private String name;
        private boolean rocks;

        @JsonProperty
        public String getName()
        {
            return name;
        }

        @JsonProperty
        public Person setName(String name)
        {
            this.name = name;
            return this;
        }

        @JsonProperty
        public boolean isRocks()
        {
            return rocks;
        }

        @JsonProperty
        public Person setRocks(boolean rocks)
        {
            this.rocks = rocks;
            return this;
        }

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

            Person person = (Person) o;

            if (rocks != person.rocks) {
                return false;
            }
            if (name != null ? !name.equals(person.name) : person.name != null) {
                return false;
            }

            return true;
        }

        @Override
        public int hashCode()
        {
            int result = name != null ? name.hashCode() : 0;
            result = 31 * result + (rocks ? 1 : 0);
            return result;
        }

        @Override
        public String toString()
        {
            return toStringHelper(this)
                    .add("name", name)
                    .add("rocks", rocks)
                    .toString();
        }
    }
}