Создание пустого элемента, если не существует

Question

Привет, друзья, надеюсь, у вас все хорошо. У меня есть проблема в моем XML-файле, то есть в одном наборе существуют определенные элементы, а в следующем наборе его нет, поэтому я хочу создать те элементы, которых нет в наборе. Ниже следует мой XML-файл. Pls. помоги мне.

<Jobs>
  <Job>
    <Job_ID>80000000</Job_ID> 
    <PositionID>60000002</PositionID> 
    <Title>Development Manager - Investment Banking - Equities Business</Title> 
    <Summary>An experienced Development Manager with previous experience leading a small to mid-size team of developers in a Java/J2EE environment. A hands on role, you will be expected to manage and mentor a team of developers working on a mix of greenfield and maintenance projects.&#160;&#160; My client, a well known investment bank, requires an experienced Development Manager to join their core technology team. This t</Summary> 
    <DateActive>10/6/2009</DateActive> 
    <DateExpire>11/5/2009</DateExpire> 
    <DateUpdated>10/6/2009</DateUpdated> 
    <Country>Country</Country> 
    <State>state</State> 
    <City>city</City> 
    <PostalCode>2000</PostalCode> 
    <CompanyName>Ambition Technology</CompanyName> 
    <BuilderFields /> 
    <DisplayOptions /> 
    <AddressType>6</AddressType> 
  </Job>
  <Job>
    <Job_ID>83790557</Job_ID> 
    <PositionID>61220512</PositionID> 
    <Title>SQL/VB Analyst Programmers With Strong Client Facing Skills $60 - $80K</Title> 
    <Summary>Excellent Location New Technologies Career Potential My client is a fast paced  IT company in Consultancy based in Inner West of Sydney. My client is experiencing a large amount of growth due to new exciting projects which they have won due to their impressive reputation and quality of work. Due to the large amount of growth my client is experiencing they are looking to take on&#160;3 Analyst/Programmer</Summary> 
    <DateActive>10/5/2009</DateActive> 
    <DateExpire>11/4/2009</DateExpire> 
    <DateUpdated>10/5/2009</DateUpdated> 
    <Country>Australia</Country> 
    <State>NSW</State> 
    <City>Sydney</City> 
    <PostalCode>2000</PostalCode> 
    <CompanyName>Skill Quest</CompanyName> 
    <SalMin>30000</SalMin> 
    <SalMax>70000</SalMax> 
    <SalType>Per Year</SalType> 
    <SalCurrency>AUD</SalCurrency> 
    <BuilderFields /> 
    <DisplayOptions /> 
    <AddressType>6</AddressType> 
  </Job>
</Jobs>

Итак, я хочу добавить новый элемент, такой как SalMin, SalMax, SalType и SalCurrency, как пустые элементы, если они не существуют. И это я хочу сделать при использовании преобразования xslt.

Answer 1

<xsl:template name="ApplyTemplatesOrCreate">
  <xsl:param name="elemName" select="''" />
  <xsl:param name="elemDefault" select="''" />

  <xsl:variable name="elem" select="*[name() = $elemName]" />

  <xsl:choose>
    <xsl:when test="$elem">
      <xsl:apply-templates select="$elem" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:if test="$elemName != ''">
        <xsl:element name="{$elemName}">
          <xsl:value-of select="$elemDefault" />
        </xsl:element>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

позвонить как:

<xsl:call-template name="ApplyTemplatesOrCreate">
  <xsl:with-param name="elemName" select="'SalMin'" />
  <xsl:with-param name="elemDefault" select="'1000'" />
</xsl:call-template>