Which Java framework for building social/collaborative app? [closed] - java

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I would like to get your opinion on this topic : I'd like to build some social/collaborative app : not much media sharing, but mainly tagging, collaborative text content (as wikis), user profile, tagging and some points system (digg/hackernews-like ?)

The choice of webapp framework is generally not influenced by the problem domain of webapp that you'll be building. Some frameworks are better at certain processes, like page-flow wizards, but you couldn't really pick one on the basis of your described type of application.
The general advice holds here:
pick the framework you're already familiar with, or
pick one you think looks easiest, or
pick one you want to learn.

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Confluence Group API [closed]

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We're creating small spring MVC 2.5 add-on to confluence. Currently we are investigating group management and read/write access to specific functions of our site.
Our architecture is a bit complex and I'm still learning, however on left side we have LDAP with groups and users, in mid there is our confluence that manages mentioned groups and users, finally on right side we have spring MVC.
Is there any Confluence API that can help me to manage groups ? During search I found this, however I'm not sure is it proper or not - testing it is also hard because of deployment.
After some search and tests I found an interface that is sufficient for our needs UserAccessor.getGroupsAsList() returns all groups in confluence and helps to manage them.

FREE Mockup Tool for Web Applications? [closed]

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what is the best FREE mockup tool for web applications?
I know balsamiq, which is really nice, but lacks the feature of linking different pages together.
I would like to do some kind of prototyping, so not just mocking a view, but also providing interaction between the mockups.
Which tool could I start with?
I think exhibit from mit csail is a good choice.
http://simile-widgets.org/exhibit/
You can load your data from javascript and simulate interaction with jquery and/or passing actions through URL parameters.

Extract roads from a google earth image [closed]

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i am wondering if there is any opensource and freeware solution to extract roads from an image, like google map images?
i think it maybe possible to code something like that with AI solutions, but i dont know where to start
thnx
If you're mainly interested in the results, instead of an algorithm, you may want to check out OpenStreetMaps.
Otherwise, you should focus on computer vision solutions and a framework such as OpenCV in order to process raw imagery and filter out streets based on their features – which is not trivial.
This sounds like it would be a valuable resource to cartographers ranging from 'street directory' publishers to the military.
I'm sure proprietary commercial software exists, but open source and freeware — probably not.

Java CUP resources, is it still used? [closed]

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I have recently been tasked to working on code that uses Java CUP. Does anybody still use it? I've found a couple small resources on it, but it looks like there isn't much documentation on the main site, Java Cup Website. If there are any mailing-lists or users out there I would like to know. BTW, I can't use the new engine that is being maintained by the people in Munich, I got to stick with version 0.1.
We use the newer one on the Eclipse XPath2 engine (disturbingly called PsychoPath).
CUP gets the job done, but we use the newer one.
Being a small piece of software, it's easier to understand, which makes up for the scarceness of resources.

Tool for generating control flow in Java [closed]

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I need a tool for generating control flow in java, but not a visual draw, something that I can work with like with path conditions or so.
Anyone ?
To future record, what I´ve found that best suits to my needs is Soot.
http://www.sable.mcgill.ca/soot/
The ASM library can do that, at the JVM-bytecode level. See Method Analysis and Control flow analyses in http://download.forge.objectweb.org/asm/asm4-guide.pdf (page 121).
Atlas is an Eclipse plugin that enables program analysis. It has a querable graph database that includes the control flow graph (as well as data flow and other relationships).
Maybe this is what you were looking for http://www.jboss.org/jbpm

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