Java XStream - 如何忽略某些元素 [英] Java XStream - How to ignore some elements

问题描述

我有以下 XML:

<xml version="1.0" encoding="UTF-8"?> 
<osm version="0.6" generator="CGImap 0.0.2">
 <bounds minlat="48.1400000" minlon="11.5400000" maxlat="48.1450000" maxlon="11.5430000"/>
 <node id="398692" lat="48.1452196" lon="11.5414971" user="Peter14" uid="13832" visible="true" version="18" changeset="10762013" timestamp="2012-02-22T18:59:41Z">
 </node>
 <node id="1956100" lat="48.1434822" lon="11.5487963" user="Peter14" uid="13832" visible="true" version="41" changeset="10762013" timestamp="2012-02-22T18:59:39Z">
  <tag k="crossing" v="traffic_signals"/>
  <tag k="highway" v="traffic_signals"/>
  <tag k="TMC:cid_58:tabcd_1:Class" v="Point"/>
  <tag k="TMC:cid_58:tabcd_1:Direction" v="positive"/>
  <tag k="TMC:cid_58:tabcd_1:LCLversion" v="9.00"/>
  <tag k="TMC:cid_58:tabcd_1:LocationCode" v="35356"/>
  <tag k="TMC:cid_58:tabcd_1:NextLocationCode" v="35357"/>
  <tag k="TMC:cid_58:tabcd_1:PrevLocationCode" v="35355"/>
 </node>
</osm>

我只想将元素(节点)映射到一个对象，但我遇到了问题:

I just want to map the elements (node) to an object, but I'm having to problems:

1. 它在抱怨 bounds 元素，因为我不想映射它们.
2. 并非所有节点都有标签，所以我遇到了一些问题.

1. It's complaining about bounds elements, because I don't want to map them.
2. Not all nodes have tags so I'm getting some issues with it.

推荐答案

不幸的是，覆盖此处提到的 Mapper 行为不适用于隐式集合或注释.我检查了 1.4.3 版.所以我发现的明显解决方案是使用省略注释来模拟被忽略的字段.非常适合我，但每次都创建它们有点无聊.

Unfortunately overriding Mapper behaviour mentioned here does not work with implicit collections or annotations. I checked with version 1.4.3. So the obvious solution I found was to mock ignored fields with ommiting annotation. Works perfect for me but a bit boring to create them every time.

@XStreamOmitField
private Object ignoredElement;

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