@XmlPath(".") 与 @XmlAdapter 冲突 [英] @XmlPath(".") conflicts with @XmlAdapter

问题描述

有了这个 Jaxb Xml 定义，我尝试通过添加 @XmlPath(".") 来删除 Map Elements Wrapper，但它在取消编组期间会导致异常

having this Jaxb Xml definition, i try to remove the Map Elements Wrapper by adding @XmlPath(".") but it cause exception during the unmarchaling

@XmlRootElement
public abstract class ViewElement{
    @XmlJavaTypeAdapter(value=EventAdapter.class)   
    public Map<Event, String> getEvents() {     
    }
    private transient Class entityType;
    public Class getEntityType() {
        return entityType;
    }
}

EventAdapter 是

And the EventAdapter is

public class EventAdapter extends XmlAdapter<EventAdapter.AdaptedMap, Map<Event, String>> { 
    public static class AdaptedMap {
        @XmlVariableNode("key")
        List<AdaptedEntry> entries = new ArrayList<AdaptedEntry>();
    }
    public static class AdaptedEntry {
        @XmlTransient
        public String key;
        @XmlValue
        public String value;
    }
    .....       
}

我的输出是

<element>
   <events>
      <onCellEdit>do some thing<onCellEdit>
   </events>
   <entityType>com.agitech.erp.model.erp.ErpFolder</entityType>
<element>

我尝试通过添加 @XmlPath(".")

@XmlPath(".")
@XmlJavaTypeAdapter(value=EventAdapter.class)   
public Map<Event, String> getEvents() {     
}

输出不错

<element>
   <onCellEdit>do some thing<onCellEdit>       
   <entityType>com.agitech.erp.model.erp.ErpFolder</entityType>
<element>

但拆线失败

Caused by: Exception [EclipseLink-3002] (Eclipse Persistence Services - 2.6.0.v20140809-296a69f): org.eclipse.persistence.exceptions.ConversionException
Exception Description: The object [], of class [class java.lang.String], from mapping [org.eclipse.persistence.oxm.mappings.XMLDirectMapping[entityType-->view.entityType/text()]] with descriptor [XMLDescriptor(com.agitech.erp.view.BeanView --> [DatabaseTable(view), DatabaseTable(viewFrame), DatabaseTable(viewElement)])], could not be converted to [class java.lang.Class].
Internal Exception: java.lang.ClassNotFoundException: 
    at org.eclipse.persistence.exceptions.ConversionException.couldNotBeConvertedToClass(ConversionException.java:95)
    at org.eclipse.persistence.internal.helper.ConversionManager.convertObjectToClass(ConversionManager.java:446)

调试 Jaxb 把我带到了这条线上

Debuging Jaxb bring me to the line

org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue

public void endElement(XPathFragment xPathFragment, UnmarshalRecord unmarshalRecord) {
    ...
    line 205 unmarshalRecord.setAttributeValue(convertedValue, xmlDirectMapping);
}

entityType 值解组期间，UnmarshalRecordImpl.currentObj 包含 EventAdapter 而不是父元素

During the unmarchaling of entityType value, the UnmarshalRecordImpl.currentObj contains the EventAdapter instead of the parent element

我修改org.eclipse.persistence.internal.oxm.record.UnmarshalRecordImpl

public XPathNode getNonAttributeXPathNode(String namespaceURI, String localName, String qName, Attributes attributes) {
....
    if(null == resultNode && null == nonPredicateNode) {
        // ANY MAPPING
        resultNode = xPathNode.getAnyNode();
// by default it return the EventAdapter, changing it to NULL fix my problem
    }
....
}

不是一个安全的解决方案

推荐答案

我已经能够重现您所看到的问题，但尚未找出原因.您可以使用以下错误来跟踪此问题的进度:

I have been able to reproduce the issue that you are seeing, but haven't yet worked out the cause. You can use the following bug to track the progress on this issue:

• http://bugs.eclipse.org/457169

这篇关于@XmlPath(".") 与 @XmlAdapter 冲突的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！