org.apache.beam.sdk.schemas.utils

Class StaticSchemaInference

java.lang.Object

org.apache.beam.sdk.schemas.utils.StaticSchemaInference

@Experimental(value=SCHEMAS)
public class StaticSchemaInference
extends java.lang.Object

A set of utilities for inferring a Beam Schema from static Java types.

Constructor Summary

Constructors

Constructor and Description
StaticSchemaInference()

Method Summary

Modifier and Type	Method and Description
static Schema.FieldType	fieldFromType(TypeDescriptor type, FieldValueTypeSupplier fieldValueTypeSupplier) Map a Java field type to a Beam Schema FieldType.
static Schema	schemaFromClass(java.lang.Class<?> clazz, FieldValueTypeSupplier fieldValueTypeSupplier) Infer a schema from a Java class.
static java.util.List<FieldValueTypeInformation>	sortBySchema(java.util.List<FieldValueTypeInformation> types, Schema schema)

Methods inherited from class java.lang.Object

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

Constructor Detail

StaticSchemaInference

public StaticSchemaInference()

Method Detail

sortBySchema

public static java.util.List<FieldValueTypeInformation> sortBySchema(java.util.List<FieldValueTypeInformation> types,
                                                                     Schema schema)

schemaFromClass

public static Schema schemaFromClass(java.lang.Class<?> clazz,
                                     FieldValueTypeSupplier fieldValueTypeSupplier)

Infer a schema from a Java class.

Takes in a function to extract a list of field types from a class. Different callers may have different strategies for extracting this list: e.g. introspecting public member variables, public getter methods, or special annotations on the class.

fieldFromType

public static Schema.FieldType fieldFromType(TypeDescriptor type,
                                             FieldValueTypeSupplier fieldValueTypeSupplier)

Map a Java field type to a Beam Schema FieldType.