java - postgres 中 "timestamp with time zone"类型的 Jooq 绑定(bind)

Question

Jooq currently does not support JSR 310 types和 support will not come until v3.8 .

使用简单的转换器通常可以工作，除了某些类型，例如 postgres 的 TIMESTAMP WITH TIME ZONE，它需要自定义绑定(bind)。所以我尝试编写一个，但生成的 XxxRecord 类仍然为我的数据库中的 TIMESTAMP WITH TIME ZONE 字段使用 Timestamp 数据类型。

我需要在下面的代码中更改什么才能在 jooq 生成的类中将 postgres 的 TIMESTAMP WITH TIME ZONE 视为 Instant？

转换器

public class TimestampConverter implements Converter<Timestamp, Instant> {
  @Override public Instant from(Timestamp ts) {
    return ts == null ? null : ts.toInstant();
  }
  @Override public Timestamp to(Instant instant) {
    return instant == null ? null : Timestamp.from(instant);
  }
  @Override public Class<Timestamp> fromType() { return Timestamp.class; }
  @Override public Class<Instant> toType() { return Instant.class; }
}

自定义绑定(bind)

public class TimestampBinding implements Binding<Timestamp, Instant> {

  private static final Converter<Timestamp, Instant> converter = new TimestampConverter();

  private final DefaultBinding<Timestamp, Instant> delegate = 
                                                       new DefaultBinding<> (converter());

  @Override public Converter<Timestamp, Instant> converter() { return converter; }

  @Override public void sql(BindingSQLContext<Instant> ctx) throws SQLException {
    delegate.sql(ctx);
  }

  //etc. same for all other overriden methods.
}

pom.xml(摘录)

<customType>
  <name>java.time.Instant</name>
  <type>java.time.Instant</type>
  <binding>xxx.TimestampBinding</binding>
</customType>

...

<forcedType>
  <name>java.time.Instant</name>
  <types>timestamp with time zone</types>
</forcedType>

Answer 1

一种方法是转义 <types> 中的空格带有反斜杠，如下所示:

<types>timestamp\ with\ time\ zone</types>

<types> 中不能只有常规空格因为默认情况下，org.jooq.util.AbstractDatabase将parse regular expressions in COMMENTS mode这使得创建的 Pattern对象 ignore whitespace在你的正则表达式中。你也可以做类似 <types>timestamp.*zone</types> 的事情，或指定您自己的 <regexFlags> .

以下是完整的 Maven jooq-codegen-maven适合我的插件标签。我还找到了 <binding>没有必要。

<plugin>
    <groupId>org.jooq</groupId>
    <artifactId>jooq-codegen-maven</artifactId>
    <version>3.7.0</version>

    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>

    <configuration>

        <jdbc>
            <driver>org.postgresql.Driver</driver>
            <url>jdbc:postgresql:postgres</url>
            <user>postgres</user>
            <password>mypass</password>
        </jdbc>

        <generator>
            <database>
                <customTypes>
                    <customType>
                        <name>Instant</name>
                        <type>java.time.Instant</type>
                        <converter>xxx.TimestampConverter</converter>
                    </customType>
                </customTypes>

                <forcedTypes>
                    <forcedType>
                        <name>Instant</name>
                        <types>timestamp\ with\ time\ zone</types>
                    </forcedType>
                </forcedTypes>

                <name>org.jooq.util.postgres.PostgresDatabase</name>
                <includes>author</includes>
                <excludes/>
                <inputSchema>public</inputSchema>
            </database>
            <target>
                <packageName>xxx.table</packageName>
                <directory>target/generated-sources/jooq</directory>
            </target>
        </generator>
    </configuration>
</plugin>