hibernate - 在 EclipseLink 中映射列名和表名

Question

我在 hibernate 中使用了 ImprovedNamingStrategy，将 Java 字段名映射到 MySQL 列名。

ex) birthDate 字段 -> birth_date 列，AccountRole 类 -> account_role 表

我正在测试将 hibernate 代码迁移到 eclipselink 代码。

EclipseLink 中与 hibernamte 的 ImprovedNamingStrategy 等效的是什么？

Answer 1

public class MyCustomizer implements SessionCustomizer {

    public void customize(Session session) throws Exception {
        Map<Class, ClassDescriptor> descs = session.getDescriptors();
        Collection<ClassDescriptor> descriptors = descs.values();
        for (ClassDescriptor desc : descriptors) {
            updateMappings(desc);
        }
    }

    private void updateMappings(ClassDescriptor desc) {
        for (DatabaseMapping mapping : desc.getMappings()) {
            if (mapping.isDirectToFieldMapping()) {
                DirectToFieldMapping directMapping = (DirectToFieldMapping) mapping;
                String name = directMapping.getAttributeName();
                String regex = "([a-z])([A-Z]+)";
                String replacement = "$1_$2";
                String newName = name.replaceAll(regex, replacement)
                        .toUpperCase();
                directMapping.getField().resetQualifiedName(newName);
            }
        }
    }
}

将属性插入到 persistence.xml 中:

  <property name="eclipselink.session.customizer" value="com.test.MyCustomizer" />