如何按名称获取所有XML节点?

时间:2019-05-15 09:44:21

标签: mule anypoint-studio dataweave mule4

我已经输入了这样的XML-

<parent>
    <child type="reference">
        <grandChild name="aaa" action="None">
            <Attribute name="xxx">1</Attribute>
            <grandChild name="bbb" action="None">
                <Attribute name="xxx">1</Attribute>
            </grandChild>
            <grandChild name="aaa" action="None">
                <Attribute name="xxx">2</Attribute>
            </grandChild>
        </grandChild>
        <grandChild name="ddd" action="None">
                <Attribute name="xxx">1</Attribute>
                <grandChild name="aaa" action="None">
                    <Attribute name="xxx">3</Attribute>
                </grandChild>
        </grandChild>
    </child>
</parent>

,并且我想提取所有按其名称聚集的grandChild节点。例如,如果要提取payload.parent.child.*grandChild filter($.@name == 'aaa'),则应获得包含3个grandChild节点的数组列表。有什么办法可以做到这一点?

感谢您的帮助。

输出-

<grandChilds>
    <grandChild name="aaa" action="None">
        <Attribute name="xxx">1</Attribute>
    </grandChild>
    <grandChild name="aaa" action="None">
        <Attribute name="xxx">2</Attribute>
    </grandChild>
    <grandChild name="aaa" action="None">
        <Attribute name="xxx">3</Attribute>
    </grandChild>
</grandChilds>

1 个答案:

答案 0 :(得分:4)

这将使用.. *选择器返回所需的输出,以检索所有子项并重建输出结构:

%dw 2.0
output application/xml
---

grandChilds:{
    ( payload.parent..*grandChild filter($.@name == 'aaa') map(gc) ->{

    grandChild @(name: gc.@name, action: gc.@action): {
        Attribute @(name: gc.Attribute.@name): gc.Attribute
    }

})

}

输出:

<?xml version='1.0' encoding='UTF-8'?>
<grandChilds>
  <grandChild name="aaa" action="None">
    <Attribute name="xxx">1</Attribute>
  </grandChild>
  <grandChild name="aaa" action="None">
    <Attribute name="xxx">2</Attribute>
  </grandChild>
  <grandChild name="aaa" action="None">
    <Attribute name="xxx">3</Attribute>
  </grandChild>
</grandChilds>

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