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yoj-json-jackson-v2: Add JsonConverter implementation using Jackson
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <project xmlns="http://maven.apache.org/POM/4.0.0" | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
| <modelVersion>4.0.0</modelVersion> | ||
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| <artifactId>yoj-json-jackson-v2</artifactId> | ||
| <packaging>jar</packaging> | ||
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| <parent> | ||
| <groupId>tech.ydb.yoj</groupId> | ||
| <artifactId>yoj-parent</artifactId> | ||
| <version>1.1.0-SNAPSHOT</version> | ||
| <relativePath>../pom.xml</relativePath> | ||
| </parent> | ||
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| <name>YOJ - JSON with Jackson 2.x</name> | ||
| <description> | ||
| Adds JSON support to YOJ (JsonConverter implementation) using Jackson 2.x as the underlying JSON library. | ||
| </description> | ||
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| <dependencies> | ||
| <dependency> | ||
| <groupId>tech.ydb.yoj</groupId> | ||
| <artifactId>yoj-repository</artifactId> | ||
| </dependency> | ||
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| <dependency> | ||
| <groupId>javax.annotation</groupId> | ||
| <artifactId>javax.annotation-api</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.guava</groupId> | ||
| <artifactId>guava</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.core</groupId> | ||
| <artifactId>jackson-databind</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.datatype</groupId> | ||
| <artifactId>jackson-datatype-jdk8</artifactId> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.datatype</groupId> | ||
| <artifactId>jackson-datatype-jsr310</artifactId> | ||
| </dependency> | ||
| </dependencies> | ||
| </project> |
98 changes: 98 additions & 0 deletions
98
json-jackson-v2/src/main/java/tech/ydb/yoj/repository/db/json/JacksonJsonConverter.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,98 @@ | ||
| package tech.ydb.yoj.repository.db.json; | ||
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| import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility; | ||
| import com.fasterxml.jackson.annotation.JsonInclude.Include; | ||
| import com.fasterxml.jackson.databind.DeserializationFeature; | ||
| import com.fasterxml.jackson.databind.JavaType; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.fasterxml.jackson.databind.SerializationFeature; | ||
| import com.fasterxml.jackson.databind.module.SimpleModule; | ||
| import com.fasterxml.jackson.datatype.jdk8.Jdk8Module; | ||
| import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule; | ||
| import com.google.common.base.Suppliers; | ||
| import lombok.NonNull; | ||
| import lombok.SneakyThrows; | ||
| import tech.ydb.yoj.repository.db.common.JsonConverter; | ||
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| import javax.annotation.Nullable; | ||
| import java.lang.reflect.Type; | ||
| import java.util.ArrayList; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.LinkedHashSet; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import java.util.TimeZone; | ||
| import java.util.function.Supplier; | ||
|
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| /** | ||
| * {@link JsonConverter YOJ JSON Converter} implementation using Jackson as the underlying JSON library. | ||
| * Use it to support JSON-valued fields ({@link tech.ydb.yoj.databind.schema.Column @Column(flatten=false)} composite | ||
| * objects and dynamic fields with type of interface/abstract class, e.g. {@link java.util.List}): | ||
| * <blockquote> | ||
| * <pre> | ||
| * CommonConverters.defineJsonConverter(new JacksonJsonConverter()); | ||
| * </pre> | ||
| * </blockquote> | ||
| * <p> | ||
| * To customize the {@link ObjectMapper} being created, create a subclass of {@code JacksonJsonConverter} and override | ||
| * its {@link #createObjectMapper()} method. | ||
| */ | ||
| public class JacksonJsonConverter implements JsonConverter { | ||
| private final Supplier<ObjectMapper> mapper = Suppliers.memoize(this::createObjectMapper); | ||
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| @Override | ||
| @SneakyThrows | ||
| public final String toJson(@NonNull Type type, @Nullable Object o) { | ||
| return mapper().writerFor(mapper().getTypeFactory().constructType(type)).writeValueAsString(o); | ||
| } | ||
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| @Override | ||
| @SneakyThrows | ||
| public final Object fromJson(@NonNull Type type, @NonNull String content) { | ||
| return mapper().readerFor(mapper().getTypeFactory().constructType(type)).readValue(content); | ||
| } | ||
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| @Override | ||
| @SneakyThrows | ||
| public final Object fromObject(@NonNull Type type, @Nullable Object content) { | ||
| JavaType jacksonType = mapper().getTypeFactory().constructType(type); | ||
| return content != null | ||
| ? mapper().convertValue(content, jacksonType) | ||
| : (jacksonType.isCollectionLikeType() ? List.of() : Map.of()); | ||
| } | ||
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| public String toString() { | ||
| return getClass().getSimpleName(); | ||
| } | ||
|
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| protected final ObjectMapper mapper() { | ||
| return mapper.get(); | ||
| } | ||
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| protected ObjectMapper createObjectMapper() { | ||
| ObjectMapper mapper = new ObjectMapper(); | ||
| mapper.setTimeZone(TimeZone.getDefault()); | ||
| mapper.registerModule(new Jdk8Module()); | ||
| mapper.registerModule(new JavaTimeModule()); | ||
| mapper.registerModule(new SimpleModule() | ||
| .addAbstractTypeMapping(Set.class, LinkedHashSet.class) | ||
| .addAbstractTypeMapping(Map.class, LinkedHashMap.class) | ||
| .addAbstractTypeMapping(List.class, ArrayList.class) | ||
| ); | ||
| mapper.setSerializationInclusion(Include.NON_NULL); | ||
| mapper.configure(SerializationFeature.INDENT_OUTPUT, false); | ||
| mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false); | ||
| mapper.configure(SerializationFeature.WRITE_DATE_KEYS_AS_TIMESTAMPS, false); | ||
| mapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, false); | ||
| mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false); | ||
| mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); | ||
| mapper.setVisibility(mapper.getSerializationConfig().getDefaultVisibilityChecker() | ||
| .withFieldVisibility(Visibility.ANY) | ||
| .withGetterVisibility(Visibility.NONE) | ||
| .withIsGetterVisibility(Visibility.NONE) | ||
| .withSetterVisibility(Visibility.NONE) | ||
| ); | ||
| return mapper; | ||
| } | ||
| } |
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96 changes: 0 additions & 96 deletions
96
repository-test/src/main/java/tech/ydb/yoj/repository/test/sample/TestJsonConverter.java
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