[Bug 1020] New - xpath boolean treats strings wrong: strings with length 0 are not considered to be false.

[bu...@apache.org]

http://nagoya.apache.org/bugzilla/show_bug.cgi?id=1020

*** shadow/1020	Mon Mar 19 02:19:01 2001
--- shadow/1020.tmp.3689	Mon Mar 19 02:19:01 2001
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*** 0 ****
--- 1,61 ----
+ +============================================================================+
+ | xpath boolean treats strings wrong: strings with length 0 are not consider |
+ +----------------------------------------------------------------------------+
+ |        Bug #: 1020                        Product: XalanJ2                 |
+ |       Status: NEW                         Version: 2.0.0                   |
+ |   Resolution:                            Platform: PC                      |
+ |     Severity: Critical                 OS/Version: Linux                   |
+ |     Priority:                           Component: org.apache.xpath        |
+ +----------------------------------------------------------------------------+
+ |  Assigned To: xalan-dev@xml.apache.org                                     |
+ |  Reported By: jtl@schlund.de                                               |
+ |      CC list: Cc:                                                          |
+ +----------------------------------------------------------------------------+
+ |          URL:                                                              |
+ +============================================================================+
+ |                              DESCRIPTION                                   |
+ Strings with length 0 should be considered false in boolean test cases.
+ Xalan2 doesn't do so. Version of xalan is 20010319051516.
+ 
+ *** Th XML File:
+ 
+ <?xml version="1.0" encoding="ISO-8859-1"?>
+ <source>
+   <test  foo="a1" bar="b1"/>
+   <test  foo="a2"         />
+   <test           bar="b3"/>
+ </source>
+ 
+ *** The XSL File:
+ 
+ <?xml version="1.0" encoding="ISO-8859-1"?>
+ <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+   
+   <xsl:template match="test">
+     <xsl:param name="foo" select="@foo"/>
+     <xsl:param name="bar"><xsl:value-of select="@bar"/></xsl:param>
+     <xsl:choose>
+       <xsl:when test="$foo">*** FOO='<xsl:value-of select="$foo"/>'</xsl:when>
+       <xsl:otherwise>*** FOO is not set.</xsl:otherwise>
+     </xsl:choose>
+     <xsl:choose>
+       <xsl:when test="$bar">*** BAR='<xsl:value-of select="$bar"/>'</xsl:when>
+       <xsl:otherwise>*** BAR is not set.</xsl:otherwise>
+     </xsl:choose>
+   </xsl:template>
+   
+ </xsl:stylesheet>
+ 
+ *** The output produced (omitting some empty lines)
+ 
+ <?xml version="1.0" encoding="UTF-8"?>
+         *** FOO='a1'
+         *** BAR='b1'
+       
+         *** FOO='a2'
+         *** BAR=''
+       
+         *** FOO is not set.
+         *** BAR='b3'
+ 
+ *** Note the BAR value in the second block.