Package net.sansa_stack.spark.io.csv.input

Class CsvRowMapperFactories

java.lang.Object

net.sansa_stack.spark.io.csv.input.CsvRowMapperFactories

public class CsvRowMapperFactories
extends Object

Constructor Summary

Constructors

Constructor	Description
CsvRowMapperFactories()

Method Summary

Modifier and Type	Method	Description
static org.apache.jena.sparql.core.Var[][]	headerToVars(String[][] columnNames)
static Function<String[],org.apache.jena.sparql.engine.binding.Binding>	rowMapperFactoryBinding(String[][] header)
static Function<String[][],Function<String[],org.apache.jena.sparql.engine.binding.Binding>>	rowMapperFactoryBinding(org.apache.jena.sparql.core.Var[] header)	A RowMapperFactory that uses a predefined set of variables
static Function<String[][],Function<String[],org.apache.jena.sparql.engine.binding.Binding>>	rowMapperFactoryJson(org.apache.jena.sparql.engine.binding.Binding parent, org.apache.jena.sparql.core.Var resultVar, org.aksw.commons.lambda.serializable.SerializableBiFunction<String[][],String[],com.google.gson.JsonObject> rowMapperFactoryJson)	Wrap a rowMapperFactoryJson such that it produces bindings
static org.apache.jena.sparql.engine.binding.Binding	rowToBinding(org.apache.jena.sparql.core.Var[][] headers, String[] strs)	Util method to create a binding from a list of variables and a list of strings.
static org.apache.jena.sparql.engine.binding.Binding	rowToBinding(org.apache.jena.sparql.core.Var[] headers, String[] strs)
static com.google.gson.JsonObject	rowToJson(String[][] headers, String[] strs)
static String[][]	transformHeader(String[][] input, Function<String,String> transform)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CsvRowMapperFactories

public CsvRowMapperFactories()

Method Details

rowMapperFactoryBinding

public static Function<String[],org.apache.jena.sparql.engine.binding.Binding> rowMapperFactoryBinding(String[][] header)

rowMapperFactoryBinding

public static Function<String[][],Function<String[],org.apache.jena.sparql.engine.binding.Binding>> rowMapperFactoryBinding(org.apache.jena.sparql.core.Var[] header)

A RowMapperFactory that uses a predefined set of variables

rowMapperFactoryJson

public static Function<String[][],Function<String[],org.apache.jena.sparql.engine.binding.Binding>> rowMapperFactoryJson(org.apache.jena.sparql.engine.binding.Binding parent,
 org.apache.jena.sparql.core.Var resultVar,
 org.aksw.commons.lambda.serializable.SerializableBiFunction<String[][],String[],com.google.gson.JsonObject> rowMapperFactoryJson)

Wrap a rowMapperFactoryJson such that it produces bindings

transformHeader

public static String[][] transformHeader(String[][] input,
 Function<String,String> transform)

headerToVars

public static org.apache.jena.sparql.core.Var[][] headerToVars(String[][] columnNames)

rowToBinding

public static org.apache.jena.sparql.engine.binding.Binding rowToBinding(org.apache.jena.sparql.core.Var[][] headers,
 String[] strs)

Util method to create a binding from a list of variables and a list of strings. The latter will be converted to plain literals. The given lists must have the same length.

A single column may have zero or more headers. This allows for the same value to be exposed under multiple variables in the returned binding.

rowToBinding

public static org.apache.jena.sparql.engine.binding.Binding rowToBinding(org.apache.jena.sparql.core.Var[] headers,
 String[] strs)

rowToJson

public static com.google.gson.JsonObject rowToJson(String[][] headers,
 String[] strs)