com.sparsity.sparksee.io

Class CSVLoader

java.lang.Object

com.sparsity.sparksee.io.CSVLoader

public class CSVLoader
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static void	loadEdges(Graph graph, java.lang.String fileName, java.lang.String edgeType, java.lang.String tailNodeType, java.lang.String headNodeType, int tail, int head, java.lang.String separator, boolean directed, boolean header, MissingEndpoint onMissingTail, MissingEndpoint onMissingHead, int[] columns, java.lang.String[] attrNames, DataType[] dataTypes, AttributeKind[] attrKinds) Loads edges from a CSV file.
static void	loadNodes(Graph graph, java.lang.String fileName, java.lang.String nodeType, java.lang.String separator, boolean header, int[] columns, java.lang.String[] attrNames, DataType[] dataTypes, AttributeKind[] attrKinds) Loads nodes from a CSV file.

Methods inherited from class java.lang.Object

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

Method Detail

loadEdges

public static void loadEdges(Graph graph,
                             java.lang.String fileName,
                             java.lang.String edgeType,
                             java.lang.String tailNodeType,
                             java.lang.String headNodeType,
                             int tail,
                             int head,
                             java.lang.String separator,
                             boolean directed,
                             boolean header,
                             MissingEndpoint onMissingTail,
                             MissingEndpoint onMissingHead,
                             int[] columns,
                             java.lang.String[] attrNames,
                             DataType[] dataTypes,
                             AttributeKind[] attrKinds)

Loads edges from a CSV file.

nodeType[in] The type of the edge to load. If it does not exist, it creates it

Parameters:

graph - [in] The graph to load the edges into

fileName - [in] The name of the file

edgeType - null

tailNodeType - [in] The type of the tail nodes. If it does not exist and onMissingTail is set to "Create", it creates it. Otherwise, an exception is thrown

headNodeType - [in] The type of the head nodes. It it does not exist and onMissingHead is set to "Create", it creates it. Otherwise, an exception is thrown

tail - [in] The tail column index. Default: 0

head - [in] The head column index. Default: 1

separator - [in] The column separator. Default: ","

directed - [in] True if this edge is directed or not. False otherwise. Default: True

header - [in] True if the CSV contains a header. False otherwise. Default: True

onMissingTail - [in] The policy to follow when a tail is missing. Default: "IsError"

onMissingHead - [in] The policy to follow when a head is missing. Default: "IsError"

columns - [in] The list of columns to load. tail and head columns must be in this list if this list is specified. If the list is empty, all columns are loaded. Default: empty

attrNames - [in] The attribute names. If this list is empty and hasHeader is set to true, the header values are used as attribute names. Default: empty

dataTypes - [in] The dataTypes of the attributes if this do not already exist. If this list is empty, the method tries to infer the data type from the first non-header row. Default: empty

attrKinds - [in] The attributeKinds of the attributes if these do not already exist. If this list is empty, the attributeKind of the created attributes are set to Basic. Default: empty

loadNodes

public static void loadNodes(Graph graph,
                             java.lang.String fileName,
                             java.lang.String nodeType,
                             java.lang.String separator,
                             boolean header,
                             int[] columns,
                             java.lang.String[] attrNames,
                             DataType[] dataTypes,
                             AttributeKind[] attrKinds)

Loads nodes from a CSV file.

Parameters:

graph - [in] The graph to load the nodes into

fileName - [in] The name of the file

nodeType - [in] The type of the node to load. If it does not exist, it creates it

separator - [in] The separator of the CSV file. Default: ","

header - [in] True if the CSV contains a header. False otherwise. Default: True

columns - [in] The list of columns to load. tail and head columns mus be in this list if this list is specified. Default: all columns

attrNames - [in] The attribute names. If this list is empty and hasHeader is set to true, the header values are used as attribute names. Default: empty

dataTypes - [in] The dataTypes of the attributes if this do not already exist. Default: empty If this list is empty, the method tries to infer the data type from the first non-header row

attrKinds - [in] The attributeKinds of the attributes if these do not already exist. Default: empty If this list is empty, the attributeKind of the created attributes are set to Basic. Default: empty