While working around following code I got the exception given below. List<Map<String, Object>> obj = mapper.readValue(result.getBody(), new TypeReference<Map<String,Object>&g...

I have been trying to get my head around the adapter pattern, out of all the patterns it's the hardest for me to imagine a use for it. I think I understand what is achieved, to me it is to convert...

I have correctly registered JacksonJaxbJsonProvider in my JAX-RS 2.0 application using: public Set<Class<?>> getClasses() { ... classes.add(com.fasterxml.jackson.jaxrs.json.JacksonJax...

I'm trying to get some Json from an API and parse them into some POJO's to work with them but i have this case where i can get for a key a simple String or an arrayList of Strings. The Json looks ...

I have been looking for some scala fluent API for mapping object-object, similar to AutoMapper. Are there such tools in Scala?

My mapper needs to send the following tuples: <custID,prodID,rate> And I want to send to reducer the custID as a key, and as value the prodID and rate together, as they are needed for the ...

I am currently in my application maping DTOs to BO (and vice versa) manually. However, this approach is awkward and clumsy. Is there any good mapper between these two representations? My require...

A lot of zip files have a root folder, how do I unpack the zip file and get rid of the root folder? I know there is the globmapper: <unzip dest="${dest.path}"> <fileset dir="${source.pa...

I'm chaining multiple MapReduce jobs and want to pass along/store some meta information (e.g. configuration or name of original input) with the results. At least the file "_SUCCESS" and also anythi...

I have written a standard select and resultMap for a table/object in one mapper.xml file and am wondering if there is a method to use this select in another mapper.xml file via the "select" paramet...

I have a class (A and B are my objects) public A { private List<B> b; private int c; } I have a String variable temp. So i would save in this variable the JSON String of my object. How? ...

I am quite sure, this is one of the many duplicated questions around XML to Java Object conversions. But I started this thread since I couldn't find simpler or looking for simpler solution. I have...

I heard we can use multiple mappers to read different parts of one bzip2 file in parallel in Hadoop, to increase performance. But I cannot find related samples after search. Appreciate if anyone co...

I want to put a set of files that look like this into a jar: yay/my.jar boo/my.jar foo/my.jar bar/my.jar In the process, I want all of them renamed as follows: yay_my.jar boo_my.jar foo_my.jar ...

In folder, src, I have a set of subfolders with java source code: /a/A.java /a/b/B.java /a/b/c/C.java I need a property with the following value: src/a/A.java,src/a/b/B.java,src/a/b/c/C.jav...

Can a single Mapper class produce multiple key-value pairs (of same type) in a single run? We output the key-value pair in the mapper like this: context.write(key, value); Here's a trimmed down...

I have the need for an object to object mapper in my application. I've tried out a few, but haven't been able to find anything that fits my needs, so I'm writing my own. Currently I have an interfa...

Let's say I have a query getUser with two parameters - userName and password. I'd like to have a mapper method looking like this: public UserBean getUser(String userName, String password); Is th...