XSLT:将通配符掩码转换为网络掩码格式(&F)

Question

我有一个具有以下结构的XML输入：

<address>
    <ip>192.168.7.5</ip>
    <netmask>16</netmask>
    <wildcard-mask>0.0.0.255</wildcard-mask>
    <enable-wildcard-mask>false</enable-wildcard-mask>
</address>

我想创建一个XSLT转换，该转换接受此输入，并在‘enable-wildcard mask’为true的情况下使用‘通配符-掩码’值，或者在‘enable-wildcard mask’为false的情况下使用'netmask‘值。但是，必须将网络掩码从格式"24“转换为"255.255.255.0”，并且必须将通配符掩码转换为网络掩码(二进制取反)。

因此，此XSLT的输出应该类似于：

<netmask>255.255.255.0</netmask>

如果‘enable-通配符-掩码’为true，并且

<netmask>255.255.0.0</netmask>

如果‘enable-通配符-掩码’为false。

下面是用于测试的XSLT框架代码：

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="address">
    <xsl:choose>
        <xsl:when test="wildcard-mask and (enable-wildcard-mask/text()='true')">
            <netmask type="string"><xsl:value-of select="wildcard-mask"/></netmask>
        </xsl:when>
        <xsl:when test="netmask">
            <netmask type="string"><xsl:value-of select="netmask"/></netmask>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>
</xsl:stylesheet>

如何在XSLT中进行必要的逐位转换？

Answer 1

最后，我使用查找表实现了转换，因为每个表只有32个条目。

因此，第一个查找表将通配符掩码转换为网络掩码，第二个查找表将格式为"/24“的网络掩码转换为255.255.255.0格式。

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="address">
    <xsl:choose>
        <!-- These 2 look-up tables convert a wildcard to a netmask, and a netmask in this form '/24' to '255.255.255.0', respectively -->
        <xsl:when test="wildcard-mask and (enable-wildcard-mask/text()='true')">
            <xsl:choose>
                <xsl:when test="(wildcard-mask/text()='255.255.255.255')"><netmask type="string">0.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='127.255.255.255')"><netmask type="string">128.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='63.255.255.255')"><netmask type="string">192.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='31.255.255.255')"><netmask type="string">224.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='15.255.255.255')"><netmask type="string">240.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='7.255.255.255')"><netmask type="string">248.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='3.255.255.255')"><netmask type="string">252.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='1.255.255.255')"><netmask type="string">254.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.255.255.255')"><netmask type="string">255.0.0.0</netmask></xsl:when>

                <xsl:when test="(wildcard-mask/text()='0.255.255.255')"><netmask type="string">255.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.127.255.255')"><netmask type="string">255.128.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.63.255.255')"><netmask type="string">255.192.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.31.255.255')"><netmask type="string">255.224.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.15.255.255')"><netmask type="string">255.240.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.7.255.255')"><netmask type="string">255.248.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.3.255.255')"><netmask type="string">255.252.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.1.255.255')"><netmask type="string">255.254.0.0</netmask></xsl:when>

                <xsl:when test="(wildcard-mask/text()='0.0.255.255')"><netmask type="string">255.255.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.127.255')"><netmask type="string">255.255.128.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.63.255')"><netmask type="string">255.255.192.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.31.255')"><netmask type="string">255.255.224.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.15.255')"><netmask type="string">255.255.240.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.7.255')"><netmask type="string">255.255.248.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.3.255')"><netmask type="string">255.255.252.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.1.255')"><netmask type="string">255.255.254.0</netmask></xsl:when>

                <xsl:when test="(wildcard-mask/text()='0.0.0.255')"><netmask type="string">255.255.255.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.127')"><netmask type="string">255.255.255.128</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.63')"><netmask type="string">255.255.255.192</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.31')"><netmask type="string">255.255.255.224</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.15')"><netmask type="string">255.255.255.240</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.7')"><netmask type="string">255.255.255.248</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.3')"><netmask type="string">255.255.255.252</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.1')"><netmask type="string">255.255.255.254</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.0')"><netmask type="string">255.255.255.255</netmask></xsl:when>
                <xsl:otherwise></xsl:otherwise>
            </xsl:choose>
        </xsl:when>
        <xsl:when test="netmask">
            <xsl:choose>
                <xsl:when test="(netmask/text()='0')"><netmask type="string">0.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='1')"><netmask type="string">128.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='2')"><netmask type="string">192.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='3')"><netmask type="string">224.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='4')"><netmask type="string">240.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='5')"><netmask type="string">248.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='6')"><netmask type="string">252.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='7')"><netmask type="string">254.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='8')"><netmask type="string">255.0.0.0</netmask></xsl:when>

                <xsl:when test="(netmask/text()='9')"><netmask type="string">255.128.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='10')"><netmask type="string">255.192.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='11')"><netmask type="string">255.224.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='12')"><netmask type="string">255.240.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='13')"><netmask type="string">255.248.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='14')"><netmask type="string">255.252.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='15')"><netmask type="string">255.254.0.0</netmask></xsl:when>

                <xsl:when test="(netmask/text()='16')"><netmask type="string">255.255.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='17')"><netmask type="string">255.255.128.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='18')"><netmask type="string">255.255.192.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='19')"><netmask type="string">255.255.224.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='20')"><netmask type="string">255.255.240.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='21')"><netmask type="string">255.255.248.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='22')"><netmask type="string">255.255.252.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='23')"><netmask type="string">255.255.254.0</netmask></xsl:when>

                <xsl:when test="(netmask/text()='24')"><netmask type="string">255.255.255.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='25')"><netmask type="string">255.255.255.128</netmask></xsl:when>
                <xsl:when test="(netmask/text()='26')"><netmask type="string">255.255.255.192</netmask></xsl:when>
                <xsl:when test="(netmask/text()='27')"><netmask type="string">255.255.255.224</netmask></xsl:when>
                <xsl:when test="(netmask/text()='28')"><netmask type="string">255.255.255.240</netmask></xsl:when>
                <xsl:when test="(netmask/text()='29')"><netmask type="string">255.255.255.248</netmask></xsl:when>
                <xsl:when test="(netmask/text()='30')"><netmask type="string">255.255.255.252</netmask></xsl:when>
                <xsl:when test="(netmask/text()='31')"><netmask type="string">255.255.255.254</netmask></xsl:when>
                <xsl:when test="(netmask/text()='32')"><netmask type="string">255.255.255.255</netmask></xsl:when>
                <xsl:otherwise></xsl:otherwise>
            </xsl:choose>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>
</xsl:stylesheet>