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I need a fast way to extract data from json responses a I get from a webservice.
By fast, I mean fast for the programmer, not necessarily for the computer.
I was thinking of something like Xpath for Json, if such a thing exists.
Any ideas? I am open to any Java Json library. In fact, the easiness to extract data from Json with a powerful querying language will be central to the choice of json library.
Jackson JSON Processor has been used in a lot of frameworks. The tree model or data binding approach is probably the easiest to work with.
JsonPath emerged as a de facto standard for such tasks. A Java implementation:
https://github.com/nebhale/JsonPath
It seems well maintained and works fine.
https://github.com/jayway/JsonPath
Similar to #alexis-dufrenoy's answer -- but it looks like a more active project.
Disclaimer: I have not tried #nebhale's system, so I can't judge which is best.
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I have json rpc 2.0 server written in php. Currently I'm looking for a library that allows auto generation json rpc requests instead of using manual serialization.
I found a bunch of different libraries and really don't know which is more convenient. Did anybody successfully use one?
The best library json I've ever found is JSON-RPC 2.0
For making requests you will need base part of library. But if you want automatically handle server resonces you can take a look at client library. There are pretty much easy to understand tutorials. Hope it will help.
android-json-rpc is a pretty simple library.
Here is the documentation.
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I am looking for a code analyses framework in Java for Java.
I want to make a plugin for another very good open source project.
All I search for is a framework that reads a java file and returns a model of all objects, functions... used in the java class. (Like Eclipse Outline)
I already googled but, i couldn't find something useful.
What you need is basically just a parser (you do not need code analytics per se, just an intermediary format suitable for your need). Something simple like http://code.google.com/p/javaparser/wiki/UsingThisParser could already fit your need. If you want something a little more complete, take a look at antlr. It is a generic parser but the default implementation is in Java, and the Java grammar written for it is very good (and written by Antlr implementers).
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I am wondering if we can define EDIFACT grammar in ANTLR/xText and then generate parser.
If so, are these grammars defined already that we can leverage (open source preferably)?
Are there any open source libraries that can read and write EDIFACT other than Smooks?
From a handy book on the subject... (http://books.google.co.uk/books?id=rDbRS6vEG0MC&pg=PA222&lpg=PA222&dq=EDIFACT+bnf&source=bl&ots=pfFYf4nsVv&sig=JXY5HPo7Ka02ji35fjW8R8wFBX8&hl=en&sa=X&ei=05ozT6K5NMO80QWa-ZSLAg&ved=0CGEQ6AEwCA#v=onepage&q=EDIFACT%20bnf&f=false) we have the following section...
, which appears to suggest that it's not a good idea - although depending on what you require you can certainly write one, I would personally find Antlr an easier tool to use (I'm currently writing a lab for Xtext and it's a less forgiving learning curve), but your milage may vary...
I tried this approach (using ANTLR) when I developed bots open source edi translator (http://bots.sourceforge.net).
This looked like a good approach, but I did not succeed.
My conclusion was that 'parsing' by ANTLR is something very different than 'parsing' an edi-file; the words/concepts sound the same but these are really different worlds.
If you are looking for 'grammars'(that is: descriptions of edifact and x12 messages) these can be found in the downloads of the sourceforge page.
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I've been handed the task (not sure if i like it or not) of generating a PDF export in an eclipse RCP app. I'm looking for a framework with as little effort as possible I can pass in a pojo model and some kind of template and presto.. get a PDF report back. I've taken a look at BIRT and I'm sure it offers that functionality just was hard to read through all the stuff does anyone have a tool they use to do this that is really easy or any ideas of how to move forward? Thanks - Duncan krebs
iText is great for generating all kinds of PDFs, but If you're going to do reports, then I have to recommend JasperReports.
Also, you can use iReport to simplify the design of your jasper reports.
I think the most widely used framework for this purpose is iText. Be sure to check out the terms of use.
I use iText with Spring. A good example can be found in Springs tutorial at Spring pdf
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I need an open source GIS that allows one to view/zoom/click the maps using a web browser and should be java compliant (deployable on a java app server).
Well, I have tried to structure the requirement in 'what-i-have' and 'what-i-need' lists:
Inputs:
Location: lat/long
Data : Text to display
zoom level: (assume there are about 5)
Output
Data displayed on a Map
Would appreciate all the help I can get.
Thanks.
UPDATE: GeoServer + OpenLayers seems to be the best fit for this requirement
GeoServer: http://geoserver.org/display/GEOS/Welcome
...is what I use. You have work ahead of you no matter what you pick, though. Setting up data sources and making them look nice is a decent amount of effort.
For the client side, OpenLayers is an excellent Javascript library.
I agree with the geoserver response and all the rest of the responses ignore your statement that is has to work with Java. The only other bad option would be to write something yourself using geotools.
Go to the OpenGeo site and see the stack they support. That is the stack you are probably most interested in deploying.
I guess you'll need:
GDAL/OGR to translate the data into a kml file example
Take that KML file and pump it into either:
a. Google maps api or openlayers
b. I've had lots of luck using featuresever which I personally recommend