Question

I try to validate data in my page.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:item="http://www.myspace.com/item"
    xmlns:shop="xalan://my.app.xslt.model.Shop" xmlns:valid="xalan://my.app.xslt.validation.ShopValidator"
    xmlns:exsl="http://exslt.org/common">

I have a model with field, and class validator with methods for checking every field.

And in row

<xsl:if test="valid:isNotEmptyData(shop:getOwner($item)) != true()">
            <error message="The field OWNER is empty." />
        </xsl:if>

I get NoSuchMethodExtension although I have in model

public class Shop{
  private String owner;
  public String getOwner(){
    return owner;
  }
}

And in validator class

public static boolean isNotEmptyData(String model){
  retutn model.isEmpty();
}

Can you help me?

Answer 1

Your method Shop.getOwner() has no arguments, whereas in the XSLT you call it as shop:getOwner($item)) with one argument – the XSLT processor looks for a method with one argument and cannot find it, hence the error.

I am not sure what getOwner() is supposed to do – possibly to extract some value from its arguments..? In such a case you should modify it to accept an argument and process it.

By the way,

valid:isNotEmptyData(shop:getOwner($item)) != true()

can be written using standard XPath functions as

 not(string(shop:getOwner($item)))

(a string is considered true if it is non-empty), or as

string-length(shop:getOwner($item)) = 0