https://github.com/wenerme/postjava

Java work with PostgreSQL
https://github.com/wenerme/postjava

hibernate jsonb postgresql querydsl

Last synced: 3 months ago
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Java work with PostgreSQL

• Host: GitHub
• URL: https://github.com/wenerme/postjava
• Owner: wenerme
• License: mit
• Created: 2018-06-13T03:50:44.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-06-13T06:50:33.000Z (over 6 years ago)
• Last Synced: 2024-10-01T10:22:27.125Z (4 months ago)
• Topics: hibernate, jsonb, postgresql, querydsl
• Language: Java
• Size: 14.6 KB
• Stars: 8
• Watchers: 4
• Forks: 1
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# PostJava

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

```xml

    com.github.wenerme.postjava

    postjava

    1.0.1

```

```yaml

# Use the predefined dialect

spring.jpa.properties.hibernate.dialect: com.github.wenerme.postjava.hibernate.dialect.PostgreSQLJsonDialect

```

Or use your customized dialect

```java

public class PostgreSQLCustomDialect extends PostgreSQLDialect {

  public PostgreSQLCustomDialect() {

    super();

    // Add json/jsonb support

    PostgreSQLJsonDialect.register(this);

  }

}

```

### Define entity

* [vladmihalcea/hibernate-types](https://github.com/vladmihalcea/hibernate-types) provide json type support for hibernate

```xml

    com.vladmihalcea

    hibernate-types-52

    2.2.1

```

```java

@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 labels;

}

```

### Work with QueryDSL

```java

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

  }

}

```