在EclipseLink MOXy中使用多重继承

本文介绍了在EclipseLink MOXy中使用多重继承的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试使用spring（ @Autowire 注释到Jaxb Model类中）

I'm trying to use spring (@Autowire annotation into Jaxb Model class)

.....

@XmlAttribute(name = "object-id")
@XmlSchemaType(name = "positiveInteger")
protected BigInteger objectId;

@XmlTransient
@Autowired MediationCacheManager cacheManager;

其中 MediationCacheManager 从三个接口扩展

在创建JaxbContext时，我捕到一个异常：
Exception [EclipseLink-50089]（Eclipse Persistence Services - 2.5.0.v20121116- 8650760）：org.eclipse.persistence.exceptions.JAXBException 异常说明：JAXB无法映射java接口com.netcracker.mediation.common.caches.api.MediationCacheManager，因为它具有多个可映射的父接口。不支持多重继承

On creation of JaxbContext i catch an exception: Exception [EclipseLink-50089] (Eclipse Persistence Services - 2.5.0.v20121116-8650760): org.eclipse.persistence.exceptions.JAXBExceptionException Description: The java interface com.netcracker.mediation.common.caches.api.MediationCacheManager can not be mapped by JAXB as it has multiple mappable parent interfaces. Multiple inheritence is not supported

当然我知道eclipselink不支持多重继承，但我怎么能跳过来自Jaxb处理的cacheManager 字段？至于我 - 它应该通过 XmlTransient 注释来完成，但它没有用。你知道吗？

Of course i understand that eclipselink doesn't support multiple inheritance but how can i skip cacheManager field from Jaxb processing? As for me - it should be done by XmlTransient annotation but its no work. Have u any idea?

推荐答案

你看到的问题对应一个bug（）我们已经修复了EclipseLink 2.5.1和2.6.0流。您可以从2013年7月4日开始从以下链接下载每晚构建：

The issue you are seeing corresponds to a bug (http://bugs.eclipse.org/411993) that we have fixed in the EclipseLink 2.5.1 and 2.6.0 streams. You can download a nightly build from the following link starting July 4, 2013:

http://www.eclipse.org/eclipselink/downloads/nightly.php

替代方法

您可以使用MOXy的外部映射文档以覆盖 MediationCacheManager 的超类型，以使您的用例工作（请参阅：）：

You can use MOXy's external mapping document to override the supertype of MediationCacheManager to make your use case work (see: http://blog.bdoughan.com/2010/12/extending-jaxb-representing-annotations.html):

oxm.xml

<?xml version="1.0"?>
<xml-bindings
    xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"
    package-name="forum17458822">
    <java-types>
        <java-type name="MediationCacheManager" super-type="java.lang.Object"/>
    </java-types>
</xml-bindings>

演示

Demo

import java.util.*;
import javax.xml.bind.JAXBContext;
import org.eclipse.persistence.jaxb.JAXBContextProperties;

public class Demo {

    public static void main(String[] args) throws Exception {
        Map<String, Object> properties = new HashMap<String, Object>(1);
        properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, "forum17458822/oxm.xml");
        JAXBContext jc = JAXBContext.newInstance(new Class[] {Foo.class}, properties);
    }

}

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