xml - XSLT 1.0 - 分组 xml 元素

Question

需要将系统A对fint的请求转化为系统B的请求。

假设我有一个来自系统 A 的 XML 文档，如下所示:

<root>
<Bundle>
    <authors>
        <author>
            <authorID>100</authorID>
            <authorName>Kathisiera</authorName>
        </author>
        <author>
            <authorID>200</authorID>
            <authorName>Bates</authorName>
        </author>
        <author>
            <authorID>300</authorID>
            <authorName>Gavin King</authorName>
        </author>
    </authors>
    <books>
        <book>
            <bookOrderID>1111</bookOrderID>
            <bookName>Head First Java</bookName>
            <bookRefID>100</bookRefID>
        </book>
        <book>
            <bookOrderID>5555</bookOrderID>
            <bookName>Head First Servlets</bookName>
            <bookRefID>200</bookRefID>
        </book>
        <book>
            <bookOrderID>1111</bookOrderID>
            <bookName>Hibernate In Action</bookName>
            <bookRefID>300</bookRefID>
        </book>
    </books>
</Bundle>

我必须将此请求放入系统 B 的请求结构中:

<root>
<Bundle>
    <authors>
        <author>
            <authorID>100</authorID>
            <authorName>Kathisiera</authorName>
        </author>
        <author>
            <authorID>300</authorID>
            <authorName>Gavin King</authorName>
        </author>
    </authors>
    <books>
        <book>
            <bookOrderID>1111</bookOrderID>
            <bookName>Head First Java</bookName>
            <bookRefID>100</bookRefID>
        </book>
        <book>
            <bookOrderID>1111</bookOrderID>
            <bookName>Hibernate In Action</bookName>
            <bookRefID>300</bookRefID>
        </book>
    </books>
</Bundle>
<Bundle>
    <authors>
        <author>
            <authorID>200</authorID>
            <authorName>Bates</authorName>
        </author>
    </authors>
    <books>
        <book>
            <bookOrderID>5555</bookOrderID>
            <bookName>Head First Servlets</bookName>
            <bookRefID>200</bookRefID>
        </book>
    </books>
</Bundle>

首先，我必须根据 bookOrderID 将 book 分组到 Bundle 中。然后通过将 bookRefID 与 authorID 进行比较，将 author 分组到 Bundle 中。

我尝试使用 xslt 的 key() generate-id() 函数。但无法得到预期的结果。

请帮我找出解决方案。

Answer 1

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:output method="xml" indent="yes"/>

    <xsl:key name="k" match="book" use="bookOrderID"/>
    <xsl:key name="a" match="author" use="authorID"/>

    <xsl:template match="/root">
        <xsl:copy>
            <xsl:apply-templates select="//books"/>
        </xsl:copy>
    </xsl:template>

    <xsl:template match="books">

        <xsl:apply-templates select="book[generate-id(.) = generate-id(key('k', bookOrderID))]"/>

    </xsl:template>

    <xsl:template match="book">
        <Bundle>
            <authors>
                <xsl:apply-templates select="key('a', key('k', bookOrderID)/bookRefID)"/>
            </authors>

            <books>
                <xsl:copy-of select="key('k', bookOrderID)"/>
            </books>
        </Bundle>
    </xsl:template>

    <xsl:template match="@* | node()">
        <xsl:copy>
            <xsl:apply-templates select="@* | node()"/>
        </xsl:copy>
    </xsl:template>

</xsl:stylesheet>

输入:

<root>
    <Bundle>
        <authors>
            <author>
                <authorID>100</authorID>
                <authorName>Kathisiera</authorName>
            </author>
            <author>
                <authorID>200</authorID>
                <authorName>Bates</authorName>
            </author>
            <author>
                <authorID>300</authorID>
                <authorName>Gavin King</authorName>
            </author>
        </authors>
        <books>
            <book>
                <bookOrderID>1111</bookOrderID>
                <bookName>Head First Java</bookName>
                <bookRefID>100</bookRefID>
            </book>
            <book>
                <bookOrderID>5555</bookOrderID>
                <bookName>Head First Servlets</bookName>
                <bookRefID>200</bookRefID>
            </book>
            <book>
                <bookOrderID>1111</bookOrderID>
                <bookName>Hibernate In Action</bookName>
                <bookRefID>300</bookRefID>
            </book>
        </books>
    </Bundle>
</root>

输出:

<root>
    <Bundle>
        <authors>
            <author>
                <authorID>100</authorID>
                <authorName>Kathisiera</authorName>
            </author>
            <author>
                <authorID>300</authorID>
                <authorName>Gavin King</authorName>
            </author>
        </authors>
        <books>
            <book>
                <bookOrderID>1111</bookOrderID>
                <bookName>Head First Java</bookName>
                <bookRefID>100</bookRefID>
            </book>
            <book>
                <bookOrderID>1111</bookOrderID>
                <bookName>Hibernate In Action</bookName>
                <bookRefID>300</bookRefID>
            </book>
        </books>
    </Bundle>
    <Bundle>
        <authors>
            <author>
                <authorID>200</authorID>
                <authorName>Bates</authorName>
            </author>
        </authors>
        <books>
            <book>
                <bookOrderID>5555</bookOrderID>
                <bookName>Head First Servlets</bookName>
                <bookRefID>200</bookRefID>
            </book>
        </books>
    </Bundle>
</root>