从XPath表达式填充XML模板文件? [英] Populate XML template-file from XPath Expressions?
问题描述
从XPath表达式的映射填充(或生成)XML模板文件的最佳方法是什么?
What would be the best way to populate (or generate) an XML template-file from a mapping of XPath expressions?
要求是我们需要从模板开始(因为它可能包含XPath表达式中未捕获的信息).
The requirements are that we will need to start with a template (since this might contain information not otherwise captured in the XPath expressions).
例如,起始模板可能是:
For example, a starting template might be:
<s11:Envelope xmlns:s11='http://schemas.xmlsoap.org/soap/envelope/'>
<ns1:create xmlns:ns1='http://predic8.com/wsdl/material/ArticleService/1/'>
<article xmlns:ns1='http://predic8.com/material/1/'>
<name>?XXX?</name>
<description>?XXX?</description>
<price xmlns:ns1='http://predic8.com/common/1/'>
<amount>?999.99?</amount>
<currency xmlns:ns1='http://predic8.com/common/1/'>???</currency>
</price>
<id xmlns:ns1='http://predic8.com/material/1/'>???</id>
</article>
</ns1:create>
</s11:Body>
</s11:Envelope>
然后提供给我们,类似于:
Then we are supplied, something like:
expression: /create/article[1]/id => 1
expression: /create/article[1]/description => bar
expression: /create/article[1]/name[1] => foo
expression: /create/article[1]/price[1]/amount => 00.00
expression: /create/article[1]/price[1]/currency => USD
expression: /create/article[2]/id => 2
expression: /create/article[2]/description => some name
expression: /create/article[2]/name[1] => some description
expression: /create/article[2]/price[1]/amount => 00.01
expression: /create/article[2]/price[1]/currency => USD
然后我们应该生成:
<ns1:create xmlns:ns1='http://predic8.com/wsdl/material/ArticleService/1/'>
<article xmlns:ns1='http://predic8.com/material/1/'>
<name xmlns:ns1='http://predic8.com/material/1/'>foo</name>
<description>bar</description>
<price xmlns:ns1='http://predic8.com/common/1/'>
<amount>00.00</amount>
<currency xmlns:ns1='http://predic8.com/common/1/'>USD</currency>
</price>
<id xmlns:ns1='http://predic8.com/material/1/'>1</id>
</article>
<article xmlns:ns1='http://predic8.com/material/2/'>
<name>some name</name>
<description>some description</description>
<price xmlns:ns1='http://predic8.com/common/2/'>
<amount>00.01</amount>
<currency xmlns:ns1='http://predic8.com/common/2/'>USD</currency>
</price>
<id xmlns:ns1='http://predic8.com/material/2/'>2</id>
</article>
</ns1:create>
我用Java实现,尽管如果可能的话,我更喜欢基于XSLT的解决方案.
I am implemented in Java, although I would prefer an XSLT-based solution if one is possible.
PS: This question is the reverse of another question I recently asked.
推荐答案
此转换从表达式"创建具有所需结果结构的XML文档-仍可将其转换为最终结果结果:
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:my="my:my">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:variable name="vPop" as="element()*">
<item path="/create/article[1]/id">1</item>
<item path="/create/article[1]/description">bar</item>
<item path="/create/article[1]/name[1]">foo</item>
<item path="/create/article[1]/price[1]/amount">00.00</item>
<item path="/create/article[1]/price[1]/currency">USD</item>
<item path="/create/article[1]/price[2]/amount">11.11</item>
<item path="/create/article[1]/price[2]/currency">AUD</item>
<item path="/create/article[2]/id">2</item>
<item path="/create/article[2]/description">some name</item>
<item path="/create/article[2]/name[1]">some description</item>
<item path="/create/article[2]/price[1]/amount">00.01</item>
<item path="/create/article[2]/price[1]/currency">USD</item>
</xsl:variable>
<xsl:template match="/">
<xsl:sequence select="my:subTree($vPop/@path/concat(.,'/',string(..)))"/>
</xsl:template>
<xsl:function name="my:subTree" as="node()*">
<xsl:param name="pPaths" as="xs:string*"/>
<xsl:for-each-group select="$pPaths"
group-adjacent=
"substring-before(substring-after(concat(., '/'), '/'), '/')">
<xsl:if test="current-grouping-key()">
<xsl:choose>
<xsl:when test=
"substring-after(current-group()[1], current-grouping-key())">
<xsl:element name=
"{substring-before(concat(current-grouping-key(), '['), '[')}">
<xsl:sequence select=
"my:subTree(for $s in current-group()
return
concat('/',substring-after(substring($s, 2),'/'))
)
"/>
</xsl:element>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="current-grouping-key()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:if>
</xsl:for-each-group>
</xsl:function>
</xsl:stylesheet>
将此转换应用于任何XML文档(未使用)时,结果为:
<create>
<article>
<id>1</id>
<description>bar</description>
<name>foo</name>
<price>
<amount>00.00</amount>
<currency>USD</currency>
</price>
<price>
<amount>11.11</amount>
<currency>AUD</currency>
</price>
</article>
<article>
<id>2</id>
<description>some name</description>
<name>some description</name>
<price>
<amount>00.01</amount>
<currency>USD</currency>
</price>
</article>
</create>
注意:
-
您需要将给出的表达式"转换为此转换中使用的格式-这很容易直接.
You need to transform the "expressions" you are given into the format used in this transformation -- this is easy and straightforward.
在最后的转换中,您需要按原样复制每个节点(使用身份规则),除了顶级节点应在"http://predic8中生成.com/wsdl/material/ArticleService/1/"
命名空间.请注意,模板"中存在的其他命名空间并未使用,可以安全地省略.
In the final transformation you need to copy every node "as-is" (using the identity rule), with the exception that the top node should be generated in the "http://predic8.com/wsdl/material/ArticleService/1/"
namespace. Note that the other namespaces present in the "template" are not used and can be safely ommitted.
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