GsonObjectSerializer.java

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package com.reallifedeveloper.common.infrastructure;
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import java.io.IOException;
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import java.lang.reflect.Type;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.time.ZonedDateTime;
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import java.time.format.DateTimeFormatter;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import com.google.gson.JsonDeserializationContext;
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import com.google.gson.JsonDeserializer;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonSyntaxException;
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import com.google.gson.TypeAdapter;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonWriter;
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import com.reallifedeveloper.common.application.notification.Notification;
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import com.reallifedeveloper.common.domain.ErrorHandling;
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import com.reallifedeveloper.common.domain.ObjectSerializer;
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import com.reallifedeveloper.common.domain.event.DomainEvent;
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/**
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 * An implementation of the {@link ObjectSerializer} that uses JSON as the serialized form.
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 *
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 * @author RealLifeDeveloper
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 */
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public class GsonObjectSerializer implements ObjectSerializer<String> {
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    /**
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     * The format used to parse and format date objects. The string is a pattern that can be used by a {@code java.time.DateTimeFormatter}.
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     */
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    public static final String DATE_FORMAT = "yyyy-MM-dd";
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    /**
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     * The format used to parse and format {@code java.time.LocalDateTime} objects. The string is a pattern that can be used by a
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     * {@code DateTimeFormatter}.
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     */
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    public static final String LOCAL_DATE_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSS";
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    /**
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     * The format used to parse and format {@code java.time.ZonedDateTime} objects. The string is a pattern that can be used by a
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     * {@code DateTimeFormatter}.
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     */
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    public static final String DATE_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSX";
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    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern(DATE_FORMAT);
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    private static final DateTimeFormatter LOCAL_DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern(LOCAL_DATE_TIME_FORMAT);
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    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern(DATE_TIME_FORMAT);
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    private final Gson gson;
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    /**
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     * Creates a new {@code GsonObjectSerializer} with default values.
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     * <p>
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     * The default values include using the pattern {@value #DATE_TIME_FORMAT} when working with {@code java.time.ZonedDateTime} objects.
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     */
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    public GsonObjectSerializer() {
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        gson = new GsonBuilder().setDateFormat(DATE_TIME_FORMAT).registerTypeAdapter(Notification.class, new NotificationDeserializer())
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                .registerTypeAdapter(LocalDate.class, new LocalDateAdapter().nullSafe())
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                .registerTypeAdapter(LocalDateTime.class, new LocalDateTmeAdapter().nullSafe())
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                .registerTypeAdapter(ZonedDateTime.class, new ZonedDateTmeAdapter().nullSafe()).create();
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    }
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    @Override
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    public String serialize(Object object) {
70 1 1. serialize : replaced return value with "" for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer::serialize → KILLED
 
        return gson.toJson(object);
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    }
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    @Override
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    public <U> U deserialize(String serializedObject, Class<U> objectType) {
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2. deserialize : negated conditional → KILLED
 
        if (serializedObject == null || objectType == null) {
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            throw new IllegalArgumentException(
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                    "Arguments must not be null: serializedObject=" + serializedObject + ", objectType=" + objectType);
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        }
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        try {
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            return gson.fromJson(serializedObject, objectType);
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        } catch (JsonSyntaxException e) {
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            throw new IllegalArgumentException("serializedObject cannot be parsed as JSON: " + serializedObject, e);
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        }
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    }
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    private static final class NotificationDeserializer implements JsonDeserializer<Notification> {
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        @Override
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        public Notification deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) {
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            if (!Notification.class.getTypeName().equals(typeOfT.getTypeName())) {
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                throw new IllegalStateException("Unexpected type in deserialize method, expected 'Notification'. typeOfT=" + typeOfT);
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            }
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            try {
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                JsonObject jsonObject = json.getAsJsonObject();
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                String eventType = jsonObject.get("eventType").getAsString();
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                long storedEventId = jsonObject.get("storedEventId").getAsLong();
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                ZonedDateTime occurredOn = context.deserialize(jsonObject.get("occurredOn"), ZonedDateTime.class);
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                @SuppressWarnings("unchecked")
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                Class<DomainEvent> eventClass = (Class<DomainEvent>) Class.forName(eventType);
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                DomainEvent event = context.deserialize(jsonObject.get("event"), eventClass);
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                ErrorHandling.checkNull("JSON notification is missing event: json=" + json, event);
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                return new Notification(eventType, storedEventId, occurredOn, event);
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            } catch (ClassNotFoundException e) {
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                throw new IllegalStateException("Internal error: " + e.toString(), e);
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            }
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        }
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    }
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    private static final class LocalDateAdapter extends TypeAdapter<LocalDate> {
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        @Override
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        public void write(final JsonWriter jsonWriter, final LocalDate localDate) throws IOException {
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            jsonWriter.value(localDate.format(DATE_FORMATTER));
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        }
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        @Override
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        public LocalDate read(final JsonReader jsonReader) throws IOException {
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            return LocalDate.parse(jsonReader.nextString(), DATE_FORMATTER);
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        }
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    }
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    private static final class LocalDateTmeAdapter extends TypeAdapter<LocalDateTime> {
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        @Override
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        public void write(final JsonWriter jsonWriter, final LocalDateTime localDateTime) throws IOException {
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            jsonWriter.value(localDateTime.format(LOCAL_DATE_TIME_FORMATTER));
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        }
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        @Override
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        public LocalDateTime read(final JsonReader jsonReader) throws IOException {
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            return LocalDateTime.parse(jsonReader.nextString(), LOCAL_DATE_TIME_FORMATTER);
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        }
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    }
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    private static final class ZonedDateTmeAdapter extends TypeAdapter<ZonedDateTime> {
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        @Override
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        public void write(final JsonWriter jsonWriter, final ZonedDateTime zonedDateTime) throws IOException {
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            jsonWriter.value(zonedDateTime.format(DATE_TIME_FORMATTER));
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        }
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        @Override
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        public ZonedDateTime read(final JsonReader jsonReader) throws IOException {
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            return ZonedDateTime.parse(jsonReader.nextString(), DATE_TIME_FORMATTER);
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        }
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    }
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}

Mutations

70

1.1
Location : serialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:serializeNull()] replaced return value with "" for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer::serialize → KILLED

75

1.1
Location : deserialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:deserializeNullEventType()] negated conditional → KILLED

2.2
Location : deserialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:deserializeNullSerializedEvent()] negated conditional → KILLED

80

1.1
Location : deserialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:serializeAndDeserializeNullLocalDateTime()] replaced return value with null for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer::deserialize → KILLED

89

1.1
Location : deserialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:deserializeNotificationWithEmptyEvent()] negated conditional → KILLED

100

1.1
Location : deserialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:deserializeNotificationWithEmptyEvent()] removed call to com/reallifedeveloper/common/domain/ErrorHandling::checkNull → KILLED

101

1.1
Location : deserialize
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:serializeAndDeserializeNotification()] replaced return value with null for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer$NotificationDeserializer::deserialize → KILLED

116

1.1
Location : read
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:serializeAndDeserializeLocalDate()] replaced return value with null for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer$LocalDateAdapter::read → KILLED

128

1.1
Location : read
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:serializeAndDeserializeLocalDateTime()] replaced return value with null for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer$LocalDateTmeAdapter::read → KILLED

140

1.1
Location : read
Killed by : com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.infrastructure.GsonObjectSerializerTest]/[method:serializeAndDeserializeEvent()] replaced return value with null for com/reallifedeveloper/common/infrastructure/GsonObjectSerializer$ZonedDateTmeAdapter::read → KILLED

Active mutators

Tests examined


Report generated by PIT 1.20.0