JarCastingquerydsl-jpa-postgres-json
This repository contains a Querydsl extension for working with JSON types when using JPA, Hibernate and PostgreSQL. It is based on https://github.com/wenerme/postjava but extends it to support more data types.
Java work with PostgreSQL
- Single class to rule both json and jsonb
- Hibernate json/jsonb dialect registry
- json/jsonb operator for QueryDSL
- json/jsonb function integration for QueryDSL
Get started
Install dialect
<dependency>
<groupId>com.github.alexliesenfeld</groupId>
<artifactId>querydsl-jpa-postgres-json</artifactId>
<version>0.0.7</version>
</dependency>
# Use the predefined dialect
spring.jpa.properties.hibernate.dialect: com.github.alexliesenfeld.querydsl.jpa.hibernate.PostgreSQLJsonDialect
Or use your customized dialect
public class PostgreSQLCustomDialect extends PostgreSQLDialect {
public PostgreSQLCustomDialect() {
super();
// Add json/jsonb support
PostgreSQLJsonDialect.register(this);
}
}
Define entity
- vladmihalcea/hibernate-types provide json type support for hibernate
<dependency>
<groupId>com.vladmihalcea</groupId>
<artifactId>hibernate-types-52</artifactId>
<version>2.2.1</version>
</dependency>
@TypeDefs({
@TypeDef(name = "json", typeClass = JsonStringType.class),
@TypeDef(name = "jsonb", typeClass = JsonBinaryType.class),
@TypeDef(name = "json-node", typeClass = JsonNodeStringType.class),
@TypeDef(name = "jsonb-node", typeClass = JsonNodeBinaryType.class),
})
@Entity
@Table(name = "users")
@Setter
@Getter
class UserEntity {
Integer id;
@Type(type="json-node")
JsonNode attributes;
@Type(type="jsonb")
Map<String,String> labels;
}
Work with QueryDSL
class PlayJson{
public static void main(String[] args) {
// Will auto detect json/jsonb
JsonPath attrs = JsonPath.of(QUserEntity.userEntity.attributes);
attrs.get("name").asText().like("wener%"); // String expression
attrs.get("age").asInt().gt(18); // Integer expression
attrs.get("score").asFloat().gt(1.5); // Float expression
attrs.get("resources").contain(1).isTrue(); // Is array contain element
attrs.get("resources").contain("A").isTrue().not(); // Is array not contain element
attrs.get("resources").contain("A").isFalse(); // Is array not contain element
attrs.get("resources").length().gt(0); // Is array length > 0
}
}
License
querydsl-jpa-postgres-json is free software: you can redistribute it and/or modify it under the terms of the MIT Public License.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the MIT Public License for more details.