org.apache.giraph.io.formats.multi

Class MappingInputFormatDescription<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,B extends org.apache.hadoop.io.Writable>

java.lang.Object

org.apache.giraph.io.formats.multi.InputFormatDescription<MappingInputFormat<I,V,E,B>>

org.apache.giraph.io.formats.multi.MappingInputFormatDescription<I,V,E,B>

Type Parameters:

I - Vertex id

V - Vertex data

E - Edge data

B - Mapping target

public class MappingInputFormatDescription<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,B extends org.apache.hadoop.io.Writable>
extends InputFormatDescription<MappingInputFormat<I,V,E,B>>

Description of the mapping input format - holds mapping input format class and all parameters specifically set for that mapping input format. Used only with MultiMappingInputFormat

Field Summary

Fields

Modifier and Type	Field and Description
static StrConfOption	MAPPING_INPUT_FORMAT_DESCRIPTIONS MappingInputFormats description - JSON array containing a JSON array for each mapping input.

Constructor Summary

Constructors

Constructor and Description
MappingInputFormatDescription(Class<? extends MappingInputFormat<I,V,E,B>> mappingInputFormatClass) Constructor with mapping input format class
MappingInputFormatDescription(String description) Constructor with json string describing this input format

Method Summary

Modifier and Type	Method and Description
static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,B extends org.apache.hadoop.io.Writable> List<MappingInputFormat<I,V,E,B>>	createMappingInputFormats(ImmutableClassesGiraphConfiguration<I,V,E> conf) Create all mapping input formats
static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,B extends org.apache.hadoop.io.Writable> List<MappingInputFormatDescription<I,V,E,B>>	getMappingInputFormatDescriptions(org.apache.hadoop.conf.Configuration conf) Get descriptions of mapping input formats from configuration.

Methods inherited from class org.apache.giraph.io.formats.multi.InputFormatDescription

addParameter, addParameters, getInputFormatClass, putParametersToConfiguration, setInputFormatClass, toJsonArray, toJsonString, toString

Methods inherited from class java.lang.Object

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

Field Detail

MAPPING_INPUT_FORMAT_DESCRIPTIONS

public static final StrConfOption MAPPING_INPUT_FORMAT_DESCRIPTIONS

MappingInputFormats description - JSON array containing a JSON array for each mapping input. Mapping input JSON arrays contain one or two elements - first one is the name of mapping input class, and second one is JSON object with all specific parameters for this mapping input. For example: [["VIF1",{"p":"v1"}],["VIF2",{"p":"v2","q":"v"}]]

Constructor Detail

MappingInputFormatDescription

public MappingInputFormatDescription(Class<? extends MappingInputFormat<I,V,E,B>> mappingInputFormatClass)

Constructor with mapping input format class

Parameters:

mappingInputFormatClass - Mapping input format class

MappingInputFormatDescription

public MappingInputFormatDescription(String description)

Constructor with json string describing this input format

Parameters:

description - Json string describing this input format

Method Detail

getMappingInputFormatDescriptions

public static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,B extends org.apache.hadoop.io.Writable> List<MappingInputFormatDescription<I,V,E,B>> getMappingInputFormatDescriptions(org.apache.hadoop.conf.Configuration conf)

Get descriptions of mapping input formats from configuration.

Type Parameters:

I - Vertex id

V - Vertex data

E - Edge data

B - Mapping target

Parameters:

conf - Configuration

Returns:

List of mapping input format descriptions

createMappingInputFormats

public static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,B extends org.apache.hadoop.io.Writable> List<MappingInputFormat<I,V,E,B>> createMappingInputFormats(ImmutableClassesGiraphConfiguration<I,V,E> conf)

Create all mapping input formats

Type Parameters:

I - Vertex id

V - Vertex data

E - Edge data

B - Mapping target data

Parameters:

conf - Configuration

Returns:

List with all mapping input formats