smile.io

Class JSON

java.lang.Object

smile.io.JSON

public class JSON
extends java.lang.Object

Reads JSON datasets. No nested objects are currently allowed.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JSON.Mode JSON files in single-line or multi-line mode.

Constructor Summary

Constructors

Constructor and Description
JSON() Constructor.

Method Summary

Modifier and Type	Method and Description
JSON	charset(java.nio.charset.Charset charset) Sets the charset.
smile.data.type.StructType	inferSchema(java.io.BufferedReader reader, int limit) Infer the schema from the top n objects.
JSON	mode(JSON.Mode mode) Reads JSON files in single-line or multi-line mode.
smile.data.DataFrame	read(java.io.BufferedReader reader, int limit) Reads a limited number of records from a JSON file.
smile.data.DataFrame	read(java.nio.file.Path path) Reads a JSON file.
smile.data.DataFrame	read(java.nio.file.Path path, int limit) Reads a JSON file.
smile.data.DataFrame	read(java.lang.String path) Reads a JSON file.
smile.data.DataFrame	read(java.lang.String path, int limit) Reads a JSON file.
JSON	schema(smile.data.type.StructType schema) Sets the schema.

Methods inherited from class java.lang.Object

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

Constructor Detail

JSON

public JSON()

Constructor.

Method Detail

schema

public JSON schema(smile.data.type.StructType schema)

Sets the schema.

Parameters:

schema - the schema of file.

charset

public JSON charset(java.nio.charset.Charset charset)

Sets the charset.

Parameters:

charset - the charset of file.

mode

public JSON mode(JSON.Mode mode)

Reads JSON files in single-line or multi-line mode.

read

public smile.data.DataFrame read(java.nio.file.Path path)
                          throws java.io.IOException

Reads a JSON file.

Parameters:

path - a JSON file path.

Throws:

java.io.IOException

read

public smile.data.DataFrame read(java.nio.file.Path path,
                                 int limit)
                          throws java.io.IOException

Reads a JSON file.

Parameters:

path - a JSON file path.

limit - reads a limited number of records.

Throws:

java.io.IOException

read

public smile.data.DataFrame read(java.lang.String path)
                          throws java.io.IOException,
                                 java.net.URISyntaxException

Reads a JSON file.

Parameters:

path - a JSON file path or URI.

Throws:

java.io.IOException

java.net.URISyntaxException

read

public smile.data.DataFrame read(java.lang.String path,
                                 int limit)
                          throws java.io.IOException,
                                 java.net.URISyntaxException

Reads a JSON file.

Parameters:

path - a JSON file path or URI.

limit - reads a limited number of records.

Throws:

java.io.IOException

java.net.URISyntaxException

read

public smile.data.DataFrame read(java.io.BufferedReader reader,
                                 int limit)
                          throws java.io.IOException

Reads a limited number of records from a JSON file.

Parameters:

reader - a JSON file reader.

limit - reads a limited number of records.

Throws:

java.io.IOException

inferSchema

public smile.data.type.StructType inferSchema(java.io.BufferedReader reader,
                                              int limit)
                                       throws java.io.IOException

Infer the schema from the top n objects. - Infer type of each row. - Merge row types to find common type - String type by default.

Throws:

java.io.IOException