CODEWITHSUNDEEP
xmlxslt
Jyoti
Jyoti

Reputation: 121

Read a variable value in xslt

I am facing issue in reading the value of a variable from Header tag into LineDetail tag. I need to do conditional mapping based on this variable value. Could anyone please help me in resolving this?

Below is the sample of my transformation rule and I need to read the value of variable $varPOFlag in LineDetail tag.

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" version="1.0" exclude-result-prefixes="msxsl">
        <xsl:output method="xml" indent="yes" />
        <xsl:template match="Invoice">          
            <Invoice>       
            <Header>
                <!-- Read the PONumber if exists  -->
                <xsl:variable name="varHeaderPONumber">
                    <xsl:choose>
                    <xsl:when test="./Header/PONumber != ''">                       
                        <xsl:value-of select="./Header/PONumber" />
                    </xsl:when>
                    </xsl:choose>
                </xsl:variable> 
                <!-- If PONumber does not exists in <Header> check at each lineItem level  -->
                <xsl:variable name="varLinePONumber">   
                    <xsl:choose>
                    <xsl:when test="not(./Header/PONumber)" >
                        <xsl:for-each select="./LineDetail">                        
                            <xsl:if test="position()=1">                                
                                <xsl:value-of select="./PONumber" />                                                            
                            </xsl:if>                               
                        </xsl:for-each> 
                    </xsl:when>
                    </xsl:choose>                   
                </xsl:variable>             
                <!--check if <Header.PONumber> matches with each <LineDetail.PONumber> -->
                <xsl:variable name ="var1212">
                    <xsl:choose>
                    <xsl:when test="$varHeaderPONumber != ''">                                                  
                    <xsl:for-each select = "./LineDetail">                              
                        <xsl:choose>
                        <xsl:when test="./PONumber !=''" >                                      
                            <xsl:choose>
                            <xsl:when test= "$varHeaderPONumber !=./PONumber">
                                <xsl:value-of select="'DoesNotMatch'"/>
                            </xsl:when>                                         
                            </xsl:choose>                                   
                        </xsl:when>                                 
                        </xsl:choose>                           
                    </xsl:for-each> 
                    </xsl:when> 
                    </xsl:choose>
                </xsl:variable> 
                <!-- set the varPOFlag = 0 /1 if PONumber exists / does not exist -->
                <xsl:variable name="varPOFlag">
                    <xsl:choose>
                    <xsl:when test="$varHeaderPONumber!='' or $varLinePONumber != ''">
                        <xsl:value-of select='1'/>
                    </xsl:when>
                    <xsl:otherwise>
                        <xsl:value-of select='0'/>
                    </xsl:otherwise>
                    </xsl:choose>               
                </xsl:variable>             
            </Header>
            <LineDetail>
                    <!--Here I Need to read the value of variable $varPOFlag -->
                    <xsl:choose>
                    <xsl:when test="$varPOFlag=0">
                        <xsl:value-of select="'Number'"/>
                    </xsl:when>
                    <xsl:otherwise>
                        <xsl:value-of select="'Description'"/>
                    </xsl:otherwise>
                    </xsl:choose>
            </LineDetail>
            </Invoice>
        </xsl:template>
    </xsl:stylesheet>

Below is the sample output.

<?xml version="1.0" encoding="UTF-8"?>
<Invoice>
   <Header>      
      <PONumber />
      <ScanComments>One or more PO#s were detected at the Line Item level. Please select one PO# for the Header PO# value</ScanComments>
      <POFlag>1</POFlag>
      <DocumentSubType>PO-3Way</DocumentSubType>
      <BuyerName />
   </Header>
</Invoice>

Upvotes: 1

Views: 1270

Answers (1)

Ian Roberts
Ian Roberts

Reputation: 122364

Variables in XSLT are lexically scoped - you can't make reference to a variable that is declared inside one of your sibling elements. But since a literal result element like <Header> doesn't change the context, it's safe to move all the variable declarations from inside the Header up a level or two - if you put them under Invoice then they will be accessible inside LineDetail as well as inside Header:

    <xsl:template match="Invoice">          
        <Invoice>       
            <!-- Read the PONumber if exists  -->
            <xsl:variable name="varHeaderPONumber">
                <xsl:choose>
                <xsl:when test="./Header/PONumber != ''">                       
                    <xsl:value-of select="./Header/PONumber" />
                </xsl:when>
                </xsl:choose>
            </xsl:variable> 
            <!-- If PONumber does not exists in <Header> check at each lineItem level  -->
            <xsl:variable name="varLinePONumber">   
                <xsl:choose>
                <xsl:when test="not(./Header/PONumber)" >
                    <xsl:for-each select="./LineDetail">                        
                        <xsl:if test="position()=1">                                
                            <xsl:value-of select="./PONumber" />                                                            
                        </xsl:if>                               
                    </xsl:for-each> 
                </xsl:when>
                </xsl:choose>                   
            </xsl:variable>             
            <!--check if <Header.PONumber> matches with each <LineDetail.PONumber> -->
            <xsl:variable name ="var1212">
                <xsl:choose>
                <xsl:when test="$varHeaderPONumber != ''">                                                  
                <xsl:for-each select = "./LineDetail">                              
                    <xsl:choose>
                    <xsl:when test="./PONumber !=''" >                                      
                        <xsl:choose>
                        <xsl:when test= "$varHeaderPONumber !=./PONumber">
                            <xsl:value-of select="'DoesNotMatch'"/>
                        </xsl:when>                                         
                        </xsl:choose>                                   
                    </xsl:when>                                 
                    </xsl:choose>                           
                </xsl:for-each> 
                </xsl:when> 
                </xsl:choose>
            </xsl:variable> 
            <!-- set the varPOFlag = 0 /1 if PONumber exists / does not exist -->
            <xsl:variable name="varPOFlag">
                <xsl:choose>
                <xsl:when test="$varHeaderPONumber!='' or $varLinePONumber != ''">
                    <xsl:value-of select='1'/>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select='0'/>
                </xsl:otherwise>
                </xsl:choose>               
            </xsl:variable>

            <Header>
            </Header>
            <LineDetail>
                <!--Here I Need to read the value of variable $varPOFlag -->
                <xsl:choose>
                <xsl:when test="$varPOFlag=0">
                    <xsl:value-of select="'Number'"/>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select="'Description'"/>
                </xsl:otherwise>
                </xsl:choose>
            </LineDetail>
        </Invoice>
    </xsl:template>

Upvotes: 2

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