I have a JRuby script that works fine through the JRuby command line.
However
when I execute the same script in an embedded environment,
Tomcat/bsf/jruby,
I get undefined method errors. Any pointers as to why the script does
not
work in the embedded environment?
Thanks,
Ed
code below works with JRuby CLI but not in embedded JRuby!!!
MyHash = {“1” => “One”, “2” => “Two”, “3” => “Three”, “4” => “Four”}
def getMaxList(hash,num)
(num < hash.size) ? hash.values[0…num-1] : hash.values
end
puts getMaxList(MyHash,2).inspect
need to use the alternate form below instead
def getMaxList(hash,num)
result = []
for i in 0…num-1
result << hash[i.to_s]
end
result
end
The error I get with the first form of the code is
:6:in `getMaxList': undefined method `[]' for
#<#:0xbffc3a> (NoMethodError)
from :4:in `each'
from :4:in `getMaxList'
from :1
org.jruby.embed.InvokeFailedException: undefined method `[]' for
#<#:0xbffc3a>
at
org.jruby.embed.internal.EmbedRubyObjectAdapterImpl.call(EmbedRubyObjectAdapterImpl.java:369)
at
org.jruby.embed.internal.EmbedRubyObjectAdapterImpl.callMethod(EmbedRubyObjectAdapterImpl.java:188)
at
org.jruby.embed.ScriptingContainer.callMethod(ScriptingContainer.java:585)
at
org.jruby.embed.jsr223.JRubyEngine.invokeFunction(JRubyEngine.java:278)
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I have a JRuby script that works fine through the JRuby command line. However
when I execute the same script in an embedded environment, Tomcat/bsf/jruby,
I get undefined method errors. Any pointers as to why the script does not
work in the embedded environment?
From the exception, I guess you created a java.lang.Map type object
and called Ruby method with that object in its argument. Right?
This is a Java integration related problem. I think this seems to be a
bug since Map type object didn’t converted to Ruby’s Hash. In the
method, getMaxList, the Java’s Map type object was there as a “hash.”
Because Java’s Map and its descendants don’t have “each” method, you
got the error. Would you file this?
-Yoko
org.jruby.embed.internal.EmbedRubyObjectAdapterImpl.callMethod(EmbedRubyObjectAdapterImpl.java:188)
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Yoko,
You are correct. I instantiate a Map object in Java and pass it as an
argument to the ruby function. I will go ahead and file an issue.
Thanks,
Ed
From the exception, I guess you created a java.lang.Map type object
and called Ruby method with that object in its argument. Right?
This is a Java integration related problem. I think this seems to be a
bug since Map type object didn’t converted to Ruby’s Hash. In the
method, getMaxList, the Java’s Map type object was there as a “hash.”
Because Java’s Map and its descendants don’t have “each” method, you
got the error. Would you file this?