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Posted to dev@tomcat.apache.org by bu...@apache.org on 2002/09/15 10:15:45 UTC

DO NOT REPLY [Bug 12657] New: - using name-from-attribute in tld causes NullPointerException

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=12657

using name-from-attribute in tld causes NullPointerException

           Summary: using name-from-attribute in tld causes
                    NullPointerException
           Product: Tomcat 4
           Version: 4.1.10
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: Blocker
          Priority: Other
         Component: Jasper 2
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: craigl@begeek.com


i am using the taglib 1.2 style of specfiying variables.  i have found that
using the name-from-attribute entry causes the following error:

java.lang.NullPointerException
        at java.util.Hashtable.get(Hashtable.java(Compiled Code))
        at
org.apache.jasper.compiler.ScriptingVariabler$ScriptingVariableVisitor.setScriptingVars(ScriptingVariabler.java:175)
        at
org.apache.jasper.compiler.ScriptingVariabler$ScriptingVariableVisitor.visit(ScriptingVariabler.java:110)
        at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:701)
        at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1014)
        at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1056)
        at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1062)
        at org.apache.jasper.compiler.Node$Root.accept(Node.java:232)
        at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1014)
        at
org.apache.jasper.compiler.ScriptingVariabler.set(ScriptingVariabler.java:197)
        at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:241)
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:325)

the tld entry is as follows:

    <variable>
      <name-from-attribute>id</name-from-attribute>
      <variable-class>com.begeek.engine.config.PageInfo</variable-class>
      <declare>true</declare>
      <scope>AT_BEGIN</scope>
    </variable>

the getId() method on a newly created PageInfo object does return a default
value ( not sure if thats required )

i'd be happy to try anything or provide any further information upon request.

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