Package io.deephaven.iceberg.util

Class InferenceResolver

java.lang.Object

io.deephaven.iceberg.util.InferenceResolver

All Implemented Interfaces:

ResolverProvider

@Immutable
public abstract class InferenceResolver
extends Object
implements ResolverProvider

This provides a consolidated set of inference options for use in LoadTableOptions. This is useful when the caller does not know the structure of the table to be loaded, and wants the resulting Deephaven definition (and mapping to the Iceberg fields) to be inferred. This is a counterpart to the more advanced InferenceInstructions, which requires the callers to be more explicit about the Schema.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	InferenceResolver.Builder

Nested classes/interfaces inherited from interface io.deephaven.iceberg.util.ResolverProvider

ResolverProvider.Visitor<T>

Constructor Summary

Constructors

Constructor	Description
InferenceResolver()

Method Summary

Modifier and Type	Method	Description
static InferenceResolver.Builder	builder()
boolean	failOnUnsupportedTypes()	If inference should fail if any of the Iceberg fields fail to map to Deephaven columns.
boolean	inferPartitioningColumns()	If Partitioning columns should be inferred based on the latest spec.
InferenceInstructions.Namer.Factory	namerFactory()	The namer factory.
SchemaProvider	schema()	The schema to use for inference.
final <T> T	walk(ResolverProvider.Visitor<T> visitor)

Methods inherited from class java.lang.Object

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

Constructor Details

InferenceResolver

public InferenceResolver()

Method Details

builder

public static InferenceResolver.Builder builder()

inferPartitioningColumns

@Default
public boolean inferPartitioningColumns()

If Partitioning columns should be inferred based on the latest spec. By default, is false.

Warning: inferring partition columns for general-purpose use is dangerous. This is only meant to be applied in situations where caller knows that the latest spec is safe to use for inference.

See Also:

• InferenceInstructions for more details.

failOnUnsupportedTypes

@Default
public boolean failOnUnsupportedTypes()

If inference should fail if any of the Iceberg fields fail to map to Deephaven columns. By default, is false.

namerFactory

@Default
public InferenceInstructions.Namer.Factory namerFactory()

The namer factory. Defaults to fieldName("_"), which will create Deephaven column name by joining together the field names with an underscore and legalize the name if necessary.

See Also:

• InferenceInstructions.Namer.Factory.fieldName(String)

schema

@Default
public SchemaProvider schema()

The schema to use for inference. By default, is SchemaProvider.fromCurrent().

walk

public final <T> T walk(ResolverProvider.Visitor<T> visitor)

Specified by:

walk in interface ResolverProvider