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Which Java libraries parse HTTP Accept header?
You should read this article : http://www.xml.com/pub/a/2005/06/08/restful.html
The article uses Python but it's not a problem : at the end, the following link is shared : http://code.google.com/p/mimeparse
As you can see, "mimeparse" is :
Basic functions for handling mime-types in Erlang, JavaScript, Perl, PHP, Python, Ruby, Java
According to the home page :
List<String> mimeTypesSupported = Arrays.asList(StringUtils.split(
"application/xbel+xml,text/xml", ','));
String bestMatch = MIMEParse.bestMatch(mimeTypesSupported, "text/*;q=0.5,*/*;q=0.1");
Have a look at the HttpClient Util.parseHeader method.
Edit: (trying to make this answer worth being accepted post-factum)
The spring framework provides this functionality within its MediaType component.
If you are already using Spring MVC you can simply request for a #RequestHeader-annotated parameter of type HttpHeaders and access the list of accepted media types by simply calling HttpHeaders.getAccept().
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Is there any java third party library which can be used to implement Excel's LINEST function? I want to calculate LINEST value same as LINEST[known_y's;known_x's;cont;stats] function in Excel for an array of 'x' and 'y' values. Please let me know if anyone has an idea in implementing this.
Use ApacheCommons Math Library. There are specific SimpleRegression class.
Maybe help you!
From https://support.office.com/en-us/article/LINEST-function-84d7d0d9-6e50-4101-977a-fa7abf772b6d:
"The LINEST function calculates the statistics for a line by using the 'least squares' method to calculate a straight line that best fits your data" Looks like you just need to find an algorithm for for working out the least squares
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I'll be receiving many HTTP POST request, let's assume at least 50 per minute, 24/7. I have no control over how these requests are transmitted, so I'm tied to http post here.
Which framework could I best use for receiving these many post requests? Does Spring offer a framework for handling POST push messages?
At the danger of sounding arrogant, it seems that 50 request per minute, i.e. less than one request per second, is not so many. Of course, it does depend on what the processing of the requests entails.
Spring does offer the Spring WebMVC framework (see http://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html) which will most likely help you very well to achieve your task.
You"ll have to create a Controller and annotate one of the methods to handle POST requests, something like this (adapted from the Spring docs):
#Controller
#RequestMapping("/YourPath")
public class YourController {
#RequestMapping(method = RequestMethod.POST)
public String processThePost(...many options to receive params from the request...) {
// process the parameters
return "redirect:/someFrontEndServlet";
}
}
is is a REST POST? you could try Jersey for this https://jersey.java.net/ and my favorite tutorial is this http://www.vogella.com/tutorials/REST/article.html
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I have a Java source file. I want to parse it to find where a method call occurs. For example, it could find the call:
obj.callingMethod1();
I also want to be able to replace with a different call. For example, I might replace it with:
obj2.callingMethod2();
but every things are dynamic it means that some where maybe we have a method call with parameter and so on. I found lots of parser for java , but i want to know if there is any parser that has wrote for java grammar ? I mean does it has ability to find java method call , java method definition ,java variable definition and ... thanks However, I would like to know a way to do this that takes into account the dynamic possibilities for different method calls, i.e. there may be a method call with parameter, etc. I found many Java parsers, but I want to know if there is any parser specifically for Java grammar. I am looking for something that has the ability to find java method calls, java method definitions, java variable definitions, and so on.
Your question doesn't explain if the java code occurs within the text or if the text is java code.
Based on what you said it could be
1) There's text and java code and there's a demarcation between text and java code
2) There's text and java code and there is not a demarcation.
3) The text is java code.
If what you need is (1) or (3) then I would use JavaCC: http://www.engr.mun.ca/~theo/JavaCC-Tutorial/javacc-tutorial.pdf
If what you need is (2) then there isn't much you can do beyond String.replaceAll(...)
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In Java, I have set of expressions like cond1 AND (cond2 OR cond3) AND ( cond 4 OR cond5). I would like to convert it into tree and then evaluate the final boolean answer. I tried searching a lot around java BDD but not able to get any. Any suggestion with sample code ?
A 5-second Google search returned some reasonable-looking results:
JavaBDD
Java Decision Diagram Libraries
What is the best Binary Decision Diagram library for Java?
Is this not what you're looking for?
He means Binary Decision Diagrams.
I've been tinkering with JavaBDD and JBDD/JDD. Both are based on BuDDY (a C library) -- JBDD actually uses the C DLLs for a marginal performance boost.
It looks to me like JavaBDD is more fully-featured (ex. it supports composing BDDs, which is what I need). But there is also no tutorial for it, and while the class docs aren't terrible, frankly I can't figure out how to use it for the most basic of boolean operations (like the problem you pose).
JBDD/JDD requires you to use manual garbage collection, and does weird things like store BDD objects in Java integers -- clearly carry-overs from C. But it has a set of tutorials.
If you want to run your own parser, check out JavaCC.
Here is a nice tutorial to get you started. A bit older, but still valid:
http://www.javaworld.com/jw-12-2000/jw-1229-cooltools.html
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Somewhat related to this question, but in the absence of any answer about QuickBooks specifically, does anyone know of an address parser for Java? Something that can take unstructured address information and parse out the address line 1, 2 and city state postal code and country?
I do know that the Google Maps web service is great at doing this. So, if you want to use that, you could save a lot of effort.
The real issue here is that you need a worldwide database of city/country/province names to effectively parse UNSTRUCTURED addresses.
Here is how I build a URL for use by the Google Maps API in C#:
string url = "http://maps.google.com/maps/geo?key=" + HttpUtility.UrlEncode(this.apiKey) + "&sensor=false&output=xml&oe=utf8&q=" + HttpUtility.UrlEncode(location);
The SourceForge JGeocoder has an address parser that you may find useful. See http://jgeocoder.sourceforge.net/parser.html.
Might want to read this Stack Overflow question:
"Parse usable Street Address, City, State, Zip from a string". No actual Java code to do the job (just some VB), but there is some discussion of the problem and more info on the alternative John Gietzen mentions, of using a web service to interpret it for you.
The Mural project has an address parser: https://mural.dev.java.net/. I haven't figured out how to exract it from the larger Mural engine, but it does work based on some very limited tests.
See www.address-parser.com, they offer a web service for parsing international addresses.