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Given an excel file I want to generate a pivot table programmatically. I have heard of Aspose.Cells but it is paid version. Can someone suggest some open source libraries similar to Aspose.Cells or atleast any tutorial link where I can get some help to generate pivot table programmatically.
Please try https://github.com/jbaliuka/x4j-analytic, it is open source and it is designed for pivot reports with huge details sheet.
There are several other open source libraries to achieve the same thing but we developed this library to workaround performance issues, we use temp file to avoid unreasonable memory consumption and write XML to stream as raw bytes to avoid overhead caused by XML API.
See samples https://github.com/jbaliuka/x4j-analytic/blob/master/samples/src/test/java/x4j/samples/X4JEngineTest.java, it needs XLSX template, XML descriptor and several lines of code to implement basic pivot report.
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I'm looking for a module - if it exists - that is an API for creating a traditional tree data structure (like a decision tree) and saving and loading it from a data source (like a MongoDB document). Ideally this API would allow splicing trees at any node and then resaving them to the DB and also retrieval of any node via an ID.
I've found the following:
decision-tree: too narrow a definition and no DB support.
simple-tree: no DB support
tree: no documentation
tree-kit: utilities but not a traditional tree data structure from what I can see.
tree-data: no documentation that I can find
None of these seem to be a full solution for my decision-tree needs. And it is quite possible that I'm approaching this the wrong way.
Suggestions?
EDIT:
Found tree-model and it seems promising, but still no API for interaction with a DB. Perhaps I will write one.
After looking into this and not finding a substantial solution for what I wanted, I wrote my own:
mongo-tree
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I am using Linux operating System. and my most of the application is in TCL. I am thinking of adding a module to it for creating xls file with multiple sheets and colored boxes as per requirement. Is there a way by which i can created xls file? csv will not help me for the task. Any Help/Suggestion/Keyword will be appreciated. Thanks in advance.
The excel formats are formidably tricky (only CSV is remotely easy to handle, and that's because it doesn't do much). I'd use Apache POI for this, even bearing in mind that it is Java code and so likely to be a bit awkward to integrate with your Tcl code.
If you were able to run on Windows instead, the TCOM package would let you talk to a running Excel instance to do the work more directly. That package is platform-specific though…
This i made it done by simple hit and trial of perl and half day learning of Spreadsheet::WriteExcel
http://homepage.tinet.ie/~jmcnamara/perl/WriteExcel.html
Creating perl file using tcl data and at the end executing the perl script. Final output of xls file generated. Thanks everyone for your effort.
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I am using the microsoft.office.interop.excel msdn site to be able to learn how to manipulate excel using OLE. However it is very difficult to be able to navigate through these documentations. For a trivial example, the Application.LanguageSettings should have members of its own, but from the site it's impossible to be able to locate them (http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel._application.languagesettings(v=office.14).ASPX).
Does anyone know of a better way to get this information? Is there another manual/reference? Or can one 'inspect' the object returned (for example Application.LanguageSettings returns an object, can we explore what its members are without actual documentation?). Thanks
and then you're sent to the Object iteself
theres nothing hard about it
There is an object browser that's built into VBA, under the View menu:
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I am looking to make a prototype of a UML differencing tool. What open source visualization tool kit exist that allow me to display UML diagrams?
Yet, I still need to be able to make personal edits the display. (Ie. refocusing, and drop down lists, additional displays.)
I have looked at Zest and Perfuse. But neither of these applications have a way to display a UML. If they do work, where are examples of them displaying UMLs?
you may want to have a look at GEF. As far as I know, ArgoUML is based on this framework.
There are several open source UML tools for Eclipse listed here along with their license.
For the diff part, you should check EMFCompare and this list of model versioning tools since they could be reused in your project
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I am collecting logs from several custom made applications. Each application has it's own log format. What I'm looking for is a central tool which would allow me to search through all of my logs. This means the tool would have to be able to define a different regex (or alike) for each log file (marking where a record begins, ends, and what are the fields). I've been trying Splunk, but I'm not happy with it, since performance are slow, I'm limited (free version) with the amount of indexed data per-day, and it's not as flexible as I want it to be.
Could you recommend a software (preferably free or cheap) for the task?
You can try Lucene. It is free. It is written in Java, and it allows full-text search over large amount of data. It is not a complete application, but rather a library, so you have to write code that uses it to index and to search your logs. You may have to define different document types or at least different indexing functions for your logs, but then search works beautifully.
If you can use Windows, try out Microsoft's best tool ever, Logparser. I wish there was such a simple tool for Unix. But there isn't. And although I've kept wanting to get around to making a Unix version of Logparser, I just haven't had the time.
Note: This would be a great project for someone with time on their hands or for a grad-student somewhere!
http://www.splunk.com/
Never used it, but have heard of it.