[XSL-LIST Mailing List Archive Home]
[By Thread]
[By Date]
RE: [xsl] Passing empty parameters discard parameters default val ue
Subject: RE: [xsl] Passing empty parameters discard parameters default val ue From: Rod Humphris - FLPTN <rod.humphris@xxxxxxxxxxxxxx> Date: Wed, 16 Jun 2004 16:44:14 +0100 |
Hi Michal You are suppressing the default value by passing your template a parameter with no value. An easy solution would be to not pass a parameter if you have nothing to pass. <xsl:if test="$p"> etc or to have a default value for the upstream template <xsl:template name="mytemplate"> <xsl:param name="p" select="'Default P'"/> <xsl:call-template name="mytemplate_impl"> <xsl:with-param name="p" select="$p"/> </xsl:call-template> </xsl:template> Cheers Rod -----Original Message----- From: DURDINA Michal [mailto:Michal.Durdina@xxxxxxxxxxxx] Sent: 16 June 2004 13:58 To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: [xsl] Passing empty parameters discard parameters default value Hello, I am having problems with passing empty parameters (no with-param specified) that discard default values of parameters. When I am calling the template and passing no value I want the template to use its default value. Example: <xsl:template name="mytemplate"> <xsl:param name="p"/> <xsl:call-template name="mytemplate_impl"> <xsl:with-param name="p" select="$p"/> </xsl:call-template> </xsl:template> <xsl:template name="mytemplate_impl"> <xsl:param name="p">default p</xsl:param> p = <xsl:value-of select="$p"/> </xsl:template> When calling: <xsl:call-template name="mytemplate_impl"/> the result is: p = default p But when calling <xsl:call-template name="mytemplate"/> the result is: p = what is wrong in my case, becase I did not supplied any value to parameter $p so I want to see its default value. I know that I can declare the same default value in template "mytemplate" , but then I will have the same value in more than one place and that's not good when I will need to change it. Is there any workaround for my problem? Thank you, Michal PS: If you want to have full pricture why I need this default parameter mechanism, here it is: I have hierarchy of importing stylesheets and I try to simulate polymorphism for named templates via shadowing of "interface" templates and by calling "implementation" templates. library.xsl: <!-- interface template --> <xsl:template name="mytemplate"> <xsl:param name="p"/> <xsl:call-template name="mytemplate_impl"> <xsl:with-param name="p" select="$p"/> </xsl:call-template> </xsl:template> <!-- implementation template --> <xsl:template name="mytemplate_impl"> <xsl:param name="p">default p</xsl:param> p = <xsl:value-of select="$p"/> </xsl:template> customized-library.xsl: <xsl:import href="library.xsl"/> <!-- interface template --> <xsl:template name="mytemplate"> <xsl:param name="p"/> <b> <xsl:call-template name="mytemplate_impl"> <xsl:with-param name="p" select="$p"/> </xsl:call-template> </b> </xsl:template> user-stylesheet.xsl: <xsl:include href="customized-library.xsl"/> ... <xsl:template match="/"> <xsl:call-template name="mytemplate"/> </xsl:template> user-input.xml: <?xml-stylesheet type="text/xsl" href="user-stylesheet.xsl"?> <root/> required output: <b>p = default p</b> actual output: <b>p = </b> I hope the idea is ok, developer of user-stylesheet.xsl can customize templates from library.xsl that he/she uses in user-stylesheet.xsl. But I am having the problem with passing empty parameter (no parameter) that discard default value in original template. ----------- Michal Ïurdina ASSET Soft, a.s. / eBussiness Solutions Ko¹ická 56, 821 08 Bratislava SLOVAK REPUBLIC Phone: +421-2-50703-523 Fax: +421-2-50703-444 e-mail: michal.durdina@xxxxxxxxxxxx http://www.assetsoft.sk --+------------------------------------------------------------------ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/ or e-mail: <mailto:xsl-list-unsubscribe@xxxxxxxxxxxxxxxxxxxxxx> --+-- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ _________________________________________________________________________ Any opinions expressed in this email are those of the individual and not necessarily the Company. Unless expressly stated to the contrary, this email is not intended to give rise to a new, or affect an existing, contractual or other legal relationship. This email and any files transmitted with it, including replies and forwarded copies which may contain alterations) subsequently transmitted from the Company, are confidential and solely for the use of the intended recipient. The unauthorised use, disclosure or copying of this email, or any other information contained or attached, is prohibited and could, in certain circumstances, be a criminal offence. If you have received this email in error please notify the sender as soon as possible. This footnote also confirms that this email message has been swept for the presence of computer viruses. www.focusdiy.co.uk _________________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
RE: [xsl] XSLT and Axis selection, cknell | Thread | namespace in html tags, Stephen Tredrea |
Re: [xsl] Order... is posible?, George Cristian Bina | Date | namespace in html tags, Stephen Tredrea |
Month |