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Questions tagged [mapping]

Corresponding every element of a given set to a unique element of another set or it may refer to a process of creating data element mappings between two distinct data models (objects)

In this context, mapping refers to the process of creating data element mappings between two distinct data models (objects).

When it refers to mapping in data integration, it is a set of source and target definitions linked by the transformation objects that define the rules for data transformation. Mappings represent the data flow between sources and targets.

Data mapping is typically used as a first step for a wide variety of data integration tasks such as:

  1. Data transformation or data mediation between a data source and a destination

  2. Identification of data relationships as part of data lineage analysis

  3. Replication of data between two entities with different key-value assignments

  4. Discovery of hidden sensitive data such as the last four digits social security number hidden in another user id as part of a data masking or de-identification project

  5. Consolidation of multiple databases into a single data base and identifying redundant columns of data for consolidation or elimination.

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Deserialize JSON to ArrayList using Jackson

I have a Java class MyPojo that I am interested in deserializing from JSON. I have configured a special MixIn class, MyPojoDeMixIn, to assist me with the deserialization. MyPojo has only int and String instance variables combined with proper getters…
tacos_tacos_tacos
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Mapping object to dictionary and vice versa

Are there any elegant quick way to map object to a dictionary and vice versa? Example: IDictionary a = new Dictionary(); a["Id"]=1; a["Name"]="Ahmad"; // ..... becomes SomeClass b = new…
Sawan
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How to introduce multi-column constraint with JPA annotations?

I am trying to introduce a multi-key constraint on a JPA-mapped entity: public class InventoryItem { @Id private Long id; @Version private Long version; @ManyToOne @JoinColumn("productId") private Product product; …
plouh
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Elasticsearch : Root mapping definition has unsupported parameters index : not_analyzed

Hi all I am trying to create schema Test. PUT /test { "mappings": { "field1": { "type": "integer" }, "field2": { "type": "integer" }, "field3": { "type": "string", …
Ramesh
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Can I use SPACE as mapleader in VIM?

From http://items.sjbach.com/319/configuring-vim-right I got that you were supposed to be able to use Space as the mapleader in vim. I've tried but it does not seem to work. Anyone who have made it work? Tried: let mapleader =
Marlun
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Flutter Pub: Expected a key while parsing a block mapping. path:

I'm using JSON file and register in Pubspec.ymal but showing error and also when I use an image and register it, the same error also occurs. Maybe there is a formatting mistake in it, but don't know what the problem is.this is the doc I…
Farhana Naaz Ansari
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Simple way to subset SpatialPolygonsDataFrame (i.e. delete polygons) by attribute in R

I would like simply delete some polygons from a SpatialPolygonsDataFrame object based on corresponding attribute values in the @data data frame so that I can plot a simplified/subsetted shapefile. So far I haven't found a way to do this. For…
baha-kev
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Class Mapping Error: 'T' must be a non-abstract type with a public parameterless constructor

While mapping class i am getting error 'T' must be a non-abstract type with a public parameterless constructor in order to use it as parameter 'T' in the generic type or method. Below is my SqlReaderBase Class public abstract class SqlReaderBase…
user240141
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Class that acts as mapping for **unpacking

Without subclassing dict, what would a class need to be considered a mapping so that it can be passed to a method with **. from abc import ABCMeta class uobj: __metaclass__ = ABCMeta uobj.register(dict) def f(**k): return k o =…
dskinner
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What is the meaning of a at the end of some vim mappings?

I see s a lot in vim mappings, but what does it do?
Lucia
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Haskell: how to map a tuple?

In Haskell, I can easily map a list: map (\x -> 2*x) [1,2] gives me [2,4]. Is there any "mapTuple" function which would work like that? mapTuple (\x -> 2*x) (1,2) with the result being (2,4).
quant_dev
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What the equivalent of activity life cycle in iOS?

Actually, I would say that both iOS ViewControllers and Android Activities have their lifecycle methods. For example an equivalent of ViewController.viewDidLoad() is Activity.onCreate() ? Else I still need to know the equivalent of the other…
Cool
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How can I quickly estimate the distance between two (latitude, longitude) points?

I want to be able to get a estimate of the distance between two (latitude, longitude) points. I want to undershoot, as this will be for A* graph search and I want it to be fast. The points will be at most 800 km apart.
fread2281
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Java mapping: Selma vs MapStruct

Currently there are two main popular Java Object to Object mapping frameworks that supersede Dozer (http://dozer.sourceforge.net/documentation/mappings.html), they are: Selma - http://www.selma-java.org/ MapStruct - http://mapstruct.org/ With the…
JackDev
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JPA Cannot resolve column/IntelliJ

I'm trying to map some Java classes using the Hibernate JPA implementation. My problem is that I can't use hardcoded Strings als column namens. You can see the error message I get in the picture below. I'm using OpenJPA as my Default JPA Provider…
pichlbaer
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