Re: [jruby-user] Using a text record from the database as a Java String?

Its been quite some time since I have used Rails so I am not 100% certain
but I thought ActiveRecord simply treated the DB text data type as if it
were a string in memory and everything should just "work".  According to
https://github.com/jruby/jruby/wiki/CallingJavaFromJRuby:

"When calling Java from JRuby, primitive Ruby types are converted to
default boxed Java types:
Ruby TypeJava Type*"foo"**java.lang.String**1**java.lang.Long**1.0*
*java.lang.Double**true, false**java.lang.Boolean**1*
*java.math.BigInteger*

If you are running into a problem there is always "to_java" but JRuby
should already be converting the object on your behalf:

=====
irb(main):001:0> s = "ruby string"

=> "ruby string"

irb(main):002:0> j = s.to_java

=> #<Java::JavaLang::String:0x79cda784>

irb(main):006:0> j.last_index_of('r')

=> 7


HTH,
Ariel

Ariel Valentin
e-mail: [email protected]
website: http://blog.arielvalentin.com
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On Wed, Oct 22, 2014 at 9:27 PM, David Maxwell <[email protected]> wrote:

> I'm building a rails app where the user input is submitted to the
> database via a text field, with :text datatype. I want to take this text
> data and use java to analyse and interact with it, but to do this it
> obviously needs to be a String datatype. Is there an easy way to cast
> the text data to a String so that I can manipulate it using Java? Thanks
> :)
>
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