Re: s:fielderror not working in Java 8, WebSphere

[Doug Breaux]

On 2018/05/23 19:30:40, Yasser Zamani  wrote: 
> 
> Thanks. Sorry, for last one, could you check:
> 
> java.util.Map lhm = new java.util.LinkedHashMap<>();
> Class c = lhm.getClass();
> java.lang.reflect.Method m = c.getMethod("keySet");
> Object ks = m.invoke(lhm);
> Class c2 = ks.getClass();
> java.lang.reflect.Method m2 = c2.getMethod("size");
> System.out.println("COPY ME 1: " + m2);
> Object s = m2.invoke(ks);
> System.out.println("COPY ME 2: " + s);

java TestForStruts
COPY ME 1: public final int java.util.LinkedHashMap$LinkedKeySet.size()
Exception in thread "main" java.lang.IllegalAccessException: Class 
TestForStruts can not access a member of class 
java.util.LinkedHashMap$LinkedKeySet with modifiers "public final"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:114)
at 
java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:399)
at 
java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:391)
at java.lang.reflect.Method.invoke(Method.java:501)
at TestForStruts.main(TestForStruts.java:15)

Where line 15 is:

Object s = m2.invoke(ks);

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Re: s:fielderror not working in Java 8, WebSphere

[Yasser Zamani]

On 5/23/2018 11:29 PM, Doug Breaux wrote:
> Looks the same:
> 
> java TestForStruts
> COPY ME 1: public abstract int java.util.Set.size()
> COPY ME 2: 0

Thanks. Sorry, for last one, could you check:

java.util.Map lhm = new java.util.LinkedHashMap<>();
Class c = lhm.getClass();
java.lang.reflect.Method m = c.getMethod("keySet");
Object ks = m.invoke(lhm);
Class c2 = ks.getClass();
java.lang.reflect.Method m2 = c2.getMethod("size");
System.out.println("COPY ME 1: " + m2);
Object s = m2.invoke(ks);
System.out.println("COPY ME 2: " + s);

and if were successful, then check in your action method if:

java.util.Map lhm = this.getFieldErrors()
Class c = lhm.getClass();
java.lang.reflect.Method m = c.getMethod("keySet");
Object ks = m.invoke(lhm);
Class c2 = ks.getClass();
java.lang.reflect.Method m2 = c2.getMethod("size");
System.out.println("COPY ME 1: " + m2);
Object s = m2.invoke(ks);
System.out.println("COPY ME 2: " + s);

is also successful.

Re: s:fielderror not working in Java 8, WebSphere

[Doug Breaux]

On 2018/05/23 18:38:19, Yasser Zamani  wrote: 
> then reply back COPY MEs values please. Here I get:
> 
> COPY ME 1: public abstract int java.util.Set.size()
> COPY ME 2: 0

Looks the same:

java TestForStruts
COPY ME 1: public abstract int java.util.Set.size()
COPY ME 2: 0


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Re: s:fielderror not working in Java 8, WebSphere

[Yasser Zamani]

Sorry. Could you please check this updated one which is OK here:

  public static void main(String[] args) throws Exception
  {
java.util.Map lhm = new java.util.LinkedHashMap<>();
Class c = lhm.getClass();
java.lang.reflect.Method m = c.getMethod("keySet");
Object ks = m.invoke(lhm);
java.lang.reflect.Method m2 = m.getReturnType().getMethod("size");
System.out.println("COPY ME 1: " + m2);
Object s = m2.invoke(ks);
System.out.println("COPY ME 2: " + s);
  }

then reply back COPY MEs values please. Here I get:

COPY ME 1: public abstract int java.util.Set.size()
COPY ME 2: 0


On 5/23/2018 11:01 PM, Doug Breaux wrote:
> 
> 
> On 2018/05/23 18:11:34, Yasser Zamani  wrote: 
> 
>> Thanks. Could you also check if your IBM JDK 8 is able to run this:
>>
>> java.util.Map lhm = new
>> java.util.LinkedHashMap<>();
>> Class c = lhm.getClass();
>> Method m = c.getMethod("keySet");
>> Object ks = m.invoke(lhm);
>> Method m2 = m.getReturnType().getMethod("size");
>> Object s = m2.invoke(ks);
>>
>> System.out.println("COPY ME: " + s);
>>
> 
> That actually produces a compile error:
> 
> TestForStruts.java:10: error: incompatible types: Class cannot be 
> converted to Class
> Class c = lhm.getClass();
>^
>   where CAP#1 is a fresh type-variable:
> CAP#1 extends Map from capture of ? extends Map
> 
> 
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Re: s:fielderror not working in Java 8, WebSphere

[Doug Breaux]

On 2018/05/23 18:11:34, Yasser Zamani  wrote: 

> Thanks. Could you also check if your IBM JDK 8 is able to run this:
> 
> java.util.Map lhm = new
> java.util.LinkedHashMap<>();
> Class c = lhm.getClass();
> Method m = c.getMethod("keySet");
> Object ks = m.invoke(lhm);
> Method m2 = m.getReturnType().getMethod("size");
> Object s = m2.invoke(ks);
> 
> System.out.println("COPY ME: " + s);
> 

That actually produces a compile error:

TestForStruts.java:10: error: incompatible types: Class cannot be 
converted to Class
Class c = lhm.getClass();
   ^
  where CAP#1 is a fresh type-variable:
CAP#1 extends Map from capture of ? extends Map


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Re: s:fielderror not working in Java 8, WebSphere

[Yasser Zamani]

On 5/23/2018 8:56 PM, Doug Breaux wrote:
> This is the latest IBM JDK 8. Or at least the latest that works with our 
> version WebSphere, but it's very recent. The build date is 20180214. And this 
> WebSphere cannot use Oracle or OpenJDK.

Thanks. Could you also check if your IBM JDK 8 is able to run this:

java.util.Map lhm = new
java.util.LinkedHashMap<>();
Class c = lhm.getClass();
Method m = c.getMethod("keySet");
Object ks = m.invoke(lhm);
Method m2 = m.getReturnType().getMethod("size");
Object s = m2.invoke(ks);

System.out.println("COPY ME: " + s);

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Re: s:fielderror not working in Java 8, WebSphere

[Doug Breaux]

On 2018/05/23 15:38:51, Yasser Zamani  wrote: 
> 
> Could you check with latest version of IBM JDK 8? And are you maybe able
> to check also with Oracle and OpenJDK 8?

This is the latest IBM JDK 8. Or at least the latest that works with our 
version WebSphere, but it's very recent. The build date is 20180214. And this 
WebSphere cannot use Oracle or OpenJDK.

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Re: s:fielderror not working in Java 8, WebSphere

[Yasser Zamani]

On 5/23/2018 5:38 PM, Doug Breaux wrote:
> Quite possibly. Hoping somebody here will be able to confirm or give some 
> additional hints.

Could you check with latest version of IBM JDK 8? And are you maybe able
to check also with Oracle and OpenJDK 8?

Re: s:fielderror not working in Java 8, WebSphere

[Doug Breaux]

On 2018/05/23 06:07:05, Lukasz Lenart  wrote: 
> You mean  ? There is no  tag. Did you
> try to use the latest Freemarker version?

Yes, sorry. 

I did not try the latest Freemarker, I'm using what is packaged with Struts 
(min-lib.zip). Which, even at the very latest 2.5.16, is apparently 
2.3.26-incubating. I assumed that whatever is packaged with Struts is what is 
tested and "supported" with it. Not using Maven, but I assume that's what the 
Maven dependency would pull in as well?

> I have tested the tag with Oracle Java 8 and it works without issue.
> Look like incompatibility between IBM Java and Freemarker.

Quite possibly. Hoping somebody here will be able to confirm or give some 
additional hints.


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Re: s:fielderror not working in Java 8, WebSphere

[Lukasz Lenart]

You mean  ? There is no  tag. Did you
try to use the latest Freemarker version?

I have tested the tag with Oracle Java 8 and it works without issue.
Look like incompatibility between IBM Java and Freemarker.

2018-05-22 20:24 GMT+02:00 bre...@us.ibm.com :
> Struts 2.5.14.1, WebSphere 8.5.5.13, IBM Java 8 (level 1.8.0_161) on AIX.
>
> We have a JSP with a plain  element that works without issue 
> when we switch WebSphere back to Java 7, but in Java 8 produces the following 
> error:
>
> 2018-05-22 12:43:24,384 ERROR [freemarker.runtime]: error - Error executing 
> FreeMarker template
> FreeMarker template error:
> Java method "AbstractCollection.size()" threw an exception when invoked on 
> LinkedHashMap$LinkedKeySet object "[]"; see cause exception in the Java stack 
> trace.
>
> 
> FTL stack trace ("~" means nesting-related):
> - Failed at: #assign eKeysSize = eKeys.size()  [in template 
> "template/simple/fielderror.ftl" at line 23, column 5]
> 
>
> Java stack trace (for programmers):
> 
> freemarker.core._TemplateModelException: [... Exception message was already 
> printed; see it above ...]
> at 
> freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:289)
> at 
> freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:252)
> at 
> freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:74)
> at freemarker.core.MethodCall._eval(MethodCall.java:65)
> at freemarker.core.Expression.eval(Expression.java:81)
> at freemarker.core.Assignment.accept(Assignment.java:134)
> at freemarker.core.Environment.visit(Environment.java:326)
> at freemarker.core.Environment.visit(Environment.java:332)
> at freemarker.core.Environment.visit(Environment.java:332)
> at freemarker.core.Environment.process(Environment.java:305)
> at freemarker.template.Template.process(Template.java:378)
> at 
> org.apache.struts2.components.template.FreemarkerTemplateEngine.renderTemplate(FreemarkerTemplateEngine.java:149)
> at org.apache.struts2.components.UIBean.mergeTemplate(UIBean.java:579)
> at org.apache.struts2.components.UIBean.end(UIBean.java:535)
> at 
> org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:39)
> .. my JSP
> ..
> Caused by: java.lang.AbstractMethodError: java/util/AbstractCollection.size()I
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
> at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
> at java.lang.reflect.Method.invoke(Method.java:508)
> at 
> freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:1487)
> at 
> freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:69)
>
> Does anyone know what could be the cause of this?
>
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