org.kitesdk.data.spi

Class ColumnMappingParser

java.lang.Object

org.kitesdk.data.spi.ColumnMappingParser

public class ColumnMappingParser
extends Object

Parser for ColumnMapping. Will parse the mapping annotation from Avro schemas, and will parse the ColumnMapping JSON format. An example of that is:

 [
   { "source": "field1", "type": "column", "value": "cf:field1" },
   { "source": "field2", "type": "keyAsColumn", "value": "kac:" },
   { "source": "field3", "type": "occVersion" }
 ]
 

Constructor Summary

Constructors

Constructor and Description
ColumnMappingParser()

Method Summary

Methods

Modifier and Type	Method and Description
static Schema	embedColumnMapping(Schema schema, ColumnMapping mapping)
static boolean	hasEmbeddedColumnMapping(Schema schema)
static boolean	hasEmbeddedFieldMappings(Schema schema)
static ColumnMapping	parse(File file) Parses the Mapping Descriptor from a File
static ColumnMapping	parse(InputStream in) Parses the Mapping Descriptor from an input stream
static ColumnMapping	parse(String mappingDescriptor) Parses the Mapping Descriptor as a JSON string.
static FieldMapping	parseFieldMapping(com.fasterxml.jackson.databind.JsonNode mappingNode) Parses the FieldMapping from an annotated schema field.
static FieldMapping	parseFieldMapping(String source, com.fasterxml.jackson.databind.JsonNode mappingNode) Parses the FieldMapping from an annotated schema field.
static ColumnMapping	parseFromSchema(Schema schema)
static ColumnMapping	parseFromSchemaFields(Schema schema)
static Map<Integer,FieldMapping>	parseKeyMappingsFromSchemaFields(Schema schema)
static Schema	removeEmbeddedMapping(Schema schema)
static String	toString(ColumnMapping mapping, boolean pretty)
static String	toString(FieldMapping mapping)

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnMappingParser

public ColumnMappingParser()

Method Detail

parse

public static ColumnMapping parse(String mappingDescriptor)

Parses the Mapping Descriptor as a JSON string.

Parameters:

mappingDescriptor - The mapping descriptor as a JSON string

Returns:

ColumnMapping

parse

public static ColumnMapping parse(File file)

Parses the Mapping Descriptor from a File

Parameters:

file - The File that contains the Mapping Descriptor in JSON format.

Returns:

ColumnMapping.

parse

public static ColumnMapping parse(InputStream in)

Parses the Mapping Descriptor from an input stream

Parameters:

in - The input stream that contains the Mapping Descriptor in JSON format.

Returns:

ColumnMapping.

hasEmbeddedColumnMapping

public static boolean hasEmbeddedColumnMapping(Schema schema)

removeEmbeddedMapping

public static Schema removeEmbeddedMapping(Schema schema)

parseFromSchema

public static ColumnMapping parseFromSchema(Schema schema)

hasEmbeddedFieldMappings

public static boolean hasEmbeddedFieldMappings(Schema schema)

parseFromSchemaFields

public static ColumnMapping parseFromSchemaFields(Schema schema)

embedColumnMapping

public static Schema embedColumnMapping(Schema schema,
                        ColumnMapping mapping)

parseKeyMappingsFromSchemaFields

public static Map<Integer,FieldMapping> parseKeyMappingsFromSchemaFields(Schema schema)

parseFieldMapping

public static FieldMapping parseFieldMapping(com.fasterxml.jackson.databind.JsonNode mappingNode)

Parses the FieldMapping from an annotated schema field.

Parameters:

mappingNode - The value of the "mapping" node

Returns:

FieldMapping

parseFieldMapping

public static FieldMapping parseFieldMapping(String source,
                             com.fasterxml.jackson.databind.JsonNode mappingNode)

Parses the FieldMapping from an annotated schema field.

Parameters:

source - The source field name for this mapping

mappingNode - The value of the "mapping" node

Returns:

FieldMapping

toString

public static String toString(FieldMapping mapping)

toString

public static String toString(ColumnMapping mapping,
              boolean pretty)