问题
how to sum the values which satisfy the specific condition inside a group for my test sample.The following xml data is an input sample.
<?xml version="1.0" encoding="UTF-8"?>
<Root>
<Product id="id111" partNumber="LRU1" serialNumber="xyz1"> </Product>
<Product id="id112" partNumber="LRU2" serialNumber="xyz2"> </Product>
<Product id="id113" partNumber="LRU3" serialNumber="xyz3"> </Product>
<Product id="id114" partNumber="LRU4" serialNumber="xyz4"> </Product>
<Product id="id115" partNumber="LRU5" serialNumber="xyz5"> </Product>
<RelationalRef id="id211" relatedRef="#id111 #id311"> </RelationalRef>
<RelationalRef id="id212" relatedRef="#id111 #id312"> </RelationalRef>
<RelationalRef id="id213" relatedRef="#id111 #id313"> </RelationalRef>
<RelationalRef id="id214" relatedRef="#id111 #id314"> </RelationalRef>
<RelationalRef id="id215" relatedRef="#id111 #id315"> </RelationalRef>
<RelationalRef id="id216" relatedRef="#id111 #id316"> </RelationalRef>
<RelationalRef id="id217" relatedRef="#id111 #id317"> </RelationalRef>
<RelationalRef id="id218" relatedRef="#id111 #id318"> </RelationalRef>
<RelationalRef id="id219" relatedRef="#id111 #id319"> </RelationalRef>
<RelationalRef id="id220" relatedRef="#id111 #id320"> </RelationalRef>
<RelationalRef id="id221" relatedRef="#id111 #id321"> </RelationalRef>
<RelationalRef id="id222" relatedRef="#id111 #id322"> </RelationalRef>
<RelationalRef id="id223" relatedRef="#id112 #id323"> </RelationalRef>
<RelationalRef id="id224" relatedRef="#id112 #id324"> </RelationalRef>
<RelationalRef id="id225" relatedRef="#id112 #id325"> </RelationalRef>
<RelationalRef id="id226" relatedRef="#id112 #id319"> </RelationalRef>
<RelationalRef id="id227" relatedRef="#id112 #id321"> </RelationalRef>
<RelationalRef id="id228" relatedRef="#id112 #id322"> </RelationalRef>
<RelationalRef id="id229" relatedRef="#id113 #id326"> </RelationalRef>
<RelationalRef id="id230" relatedRef="#id113 #id327"> </RelationalRef>
<RelationalRef id="id231" relatedRef="#id113 #id316"> </RelationalRef>
<RelationalRef id="id232" relatedRef="#id113 #id318"> </RelationalRef>
<RelationalRef id="id233" relatedRef="#id113 #id320"> </RelationalRef>
<RelationalRef id="id234" relatedRef="#id113 #id322"> </RelationalRef>
<RelationalRef id="id235" relatedRef="#id114 #id328"> </RelationalRef>
<RelationalRef id="id236" relatedRef="#id114 #id329"> </RelationalRef>
<RelationalRef id="id237" relatedRef="#id114 #id319"> </RelationalRef>
<RelationalRef id="id238" relatedRef="#id114 #id322"> </RelationalRef>
<RelationalRef id="id239" relatedRef="#id115 #id330"> </RelationalRef>
<RelationalRef id="id240" relatedRef="#id115 #id331"> </RelationalRef>
<RelationalRef id="id241" relatedRef="#id115 #id316"> </RelationalRef>
<RelationalRef id="id242" relatedRef="#id115 #id317"> </RelationalRef>
<RelationalRef id="id243" relatedRef="#id115 #id320"> </RelationalRef>
<RelationalRef id="id244" relatedRef="#id115 #id321"> </RelationalRef>
<CharValue id="id311" defRef="#id411" value="2"> </CharValue>
<CharValue id="id312" defRef="#id412" value="1"> </CharValue>
<CharValue id="id313" defRef="#id413" value="2"> </CharValue>
<CharValue id="id314" defRef="#id414" value="120"> </CharValue>
<CharValue id="id315" defRef="#id411" value="1"> </CharValue>
<CharValue id="id316" defRef="#id412" value="2"> </CharValue>
<CharValue id="id317" defRef="#id413" value="4"> </CharValue>
<CharValue id="id318" defRef="#id414" value="50"> </CharValue>
<CharValue id="id319" defRef="#id411" value="3"> </CharValue>
<CharValue id="id320" defRef="#id412" value="1"> </CharValue>
<CharValue id="id321" defRef="#id413" value="1"> </CharValue>
<CharValue id="id322" defRef="#id414" value="80"> </CharValue>
<CharValue id="id323" defRef="#id411" value="2"> </CharValue>
<CharValue id="id324" defRef="#id413" value="4"> </CharValue>
<CharValue id="id325" defRef="#id414" value="150"> </CharValue>
<CharValue id="id326" defRef="#id412" value="6"> </CharValue>
<CharValue id="id327" defRef="#id414" value="600"> </CharValue>
<CharValue id="id328" defRef="#id411" value="25"> </CharValue>
<CharValue id="id329" defRef="#id414" value="750"> </CharValue>
<CharValue id="id330" defRef="#id412" value="2"> </CharValue>
<CharValue id="id331" defRef="#id413" value="300"> </CharValue>
<CharDef id="id411" name="NoOfLandings"> </CharDef>
<CharDef id="id412" name="NoOfStreams"> </CharDef>
<CharDef id="id413" name="NoOfStarts"> </CharDef>
<CharDef id="id414" name="consumedLifeInMins"> </CharDef>
</Root>
The above elements are linked up through attribute references.
My .xml file contains 4 types of tag elements.
Element-1 (Product) : It contains the attributes named as id, PartNumber and serial number.
Element-2 (RelationalRef) : It contains attribute named as ‘relatedRef ‘in which first half represents ‘product element id’ and second half represents ‘CharValue element id’.
Element-3 (CharValue) : It contains attribute named as ‘defRef’ which represents ‘CharDef element id’.
Element-4 (CharDef) : It contains the attributes named as ‘id, name’.
Against each part number in Product element , corresponding serial number and cumulative ‘CharValue’ to be printed in the corresponding ‘CharDef name’ columns.
I have tried with the following xslt program.
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" indent="yes"/>
<xsl:key name="groupByRefId" match="RelationalRef" use="substring-before(@relatedRef,' ')"/>
<xsl:template match="/">
<html>
<body>
<p align="center">Consumed Report</p>
<xsl:call-template name="TableHeadings"/>
</body>
</html>
</xsl:template>
<xsl:template name="TableHeadings">
<table border="1" width="90%">
<tr>
<th align="center">Part Number</th>
<th align="center">Serial Number</th>
<th align="center">No. of Landings</th>
<th align="center">No. of Streams</th>
<th align="center">No. of Starts</th>
<th align="center">Consumed Life in Mins</th>
</tr>
<xsl:call-template name="ProcessLrus"/>
</table>
</xsl:template>
<xsl:template name="ProcessLrus">
<xsl:for-each select="//RelationalRef[generate-id(.)=generate-id(key('groupByRefId',substring-before(@relatedRef,' '))[1])]">
<xsl:variable name="productId" select="substring-before(@relatedRef,' ')"/>
<tr>
<td>
<xsl:value-of select="//Product[concat('#',@id)=$productId]/@partNumber"/>
</td>
<td>
<xsl:value-of select="//Product[concat('#',@id)=$productId]/@serialNumber"/>
</td>
<xsl:variable name="cumValueForLandings">
<xsl:for-each select="key('groupByRefId',substring-before(@relatedRef,' '))">
<xsl:variable name="charValueId" select="substring-after(@relatedRef,' #')"/>
<xsl:copy-of select="sum(//CharValue[@id=$charValueId and @defRef='#id411']/@value)"/>
</xsl:for-each>
</xsl:variable>
<td>
<xsl:value-of select="$cumValueForLandings"/>
</td>
<xsl:variable name="cumValueForStreams">
<xsl:for-each select="key('groupByRefId',substring-before(@relatedRef,' '))">
<xsl:variable name="charValueId" select="substring-after(@relatedRef,' #')"/>
<xsl:copy-of select="sum(//CharValue[@id=$charValueId and @defRef='#id412']/@value)"/>
</xsl:for-each>
</xsl:variable>
<td>
<xsl:value-of select="$cumValueForStreams"/>
</td>
<xsl:variable name="cumValueForStarts">
<xsl:for-each select="key('groupByRefId',substring-before(@relatedRef,' '))">
<xsl:variable name="charValueId" select="substring-after(@relatedRef,' #')"/>
<xsl:copy-of select="sum(//CharValue[@id=$charValueId and @defRef='#id413']/@value)"/>
</xsl:for-each>
</xsl:variable>
<td>
<xsl:value-of select="$cumValueForStarts"/>
</td>
</tr>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Iam getting the following output
<html>
<body>
<p align="center">Consumed Report</p>
<table border="1" width="90%">
<tr>
<th align="center">Part Number</th>
<th align="center">Serial Number</th>
<th align="center">No. of Landings</th>
<th align="center">No. of Streams</th>
<th align="center">No. of Starts</th>
<th align="center">Consumed Life in Mins</th>
</tr>
<tr>
<td>LRU1</td>
<td>xyz1</td>
<td>2 0 0 0 1 0 0 0 3 0 0 0</td>
<td>0 1 0 0 0 2 0 0 0 1 0 0</td>
<td>0 0 2 0 0 0 4 0 0 0 1 0</td>
</tr>
<tr>
<td>LRU2</td>
<td>xyz2</td>
<td>2 0 0 3 0 0</td>
<td>0 0 0 0 0 0</td>
<td>0 4 0 0 1 0</td>
</tr>
<tr>
<td>LRU3</td>
<td>xyz3</td>
<td>0 0 0 0 0 0</td>
<td>6 0 2 0 1 0</td>
<td>0 0 0 0 0 0</td>
</tr>
<tr>
<td>LRU4</td>
<td>xyz4</td>
<td>25 0 3 0</td>
<td>0 0 0 0</td>
<td>0 0 0 0</td>
</tr>
<tr>
<td>LRU5</td>
<td>xyz5</td>
<td>0 0 0 0 0 0</td>
<td>2 0 2 0 1 0</td>
<td>0 300 0 4 0 1</td>
</tr>
</table>
</body>
</html>
But i need the following output
<html>
<body>
<p align="center">Consumed Report</p>
<table border="1" width="90%">
<tr>
<th align="center">Part Number</th>
<th align="center">Serial Number</th>
<th align="center">No. of Landings</th>
<th align="center">No. of Streams</th>
<th align="center">No. of Starts</th>
<th align="center">Consumed Life in Mins</th>
</tr>
<tr>
<td>LRU1</td>
<td>xyz1</td>
<td>6</td>
<td>4</td>
<td>7</td>
</tr>
<tr>
<td>LRU2</td>
<td>xyz2</td>
<td>5</td>
<td>0</td>
<td>5</td>
</tr>
<tr>
<td>LRU3</td>
<td>xyz3</td>
<td>0</td>
<td>9</td>
<td>0</td>
</tr>
<tr>
<td>LRU4</td>
<td>xyz4</td>
<td>28</td>
<td>0</td>
<td>0</td>
</tr>
<tr>
<td>LRU5</td>
<td>xyz5</td>
<td>0</td>
<td>5</td>
<td>305</td>
</tr>
</table>
</body>
</html>
I think this is possible through sub-grouping inside grouping. I have done first-grouping using the match-pattern as 'RelationalRef' and first-half 'relatedRef' as expression in the first key. But iam not getting which one i have to use for second key so that i can achieve the required output.
Please anybody can provide suggestions to incorporate changes in my xslt code to achieve the required output.
来源：https://stackoverflow.com/questions/55218223/how-to-sum-the-values-which-satisfy-the-specific-condition-for-each-group-of-nod