org.apache.arrow.driver.jdbc.utils

Class VectorSchemaRootTransformer.Builder

java.lang.Object

org.apache.arrow.driver.jdbc.utils.VectorSchemaRootTransformer.Builder

Enclosing interface:

VectorSchemaRootTransformer

public static class VectorSchemaRootTransformer.Builder
extends Object

Transformer's helper class; builds a new VectorSchemaRoot.

Constructor Summary

Constructors

Constructor and Description
Builder(Schema schema, BufferAllocator bufferAllocator)

Method Summary

Modifier and Type	Method and Description
VectorSchemaRootTransformer.Builder	addEmptyField(String fieldName, ArrowType fieldType) Adds an empty field to the transformed VectorSchemaRoot schema.
VectorSchemaRootTransformer.Builder	addEmptyField(String fieldName, Types.MinorType fieldType) Adds an empty field to the transformed VectorSchemaRoot schema.
VectorSchemaRootTransformer	build()
VectorSchemaRootTransformer.Builder	renameFieldVector(String originalVectorName, String transformedVectorName) Add task to transform a vector to a new vector renaming it.

Methods inherited from class java.lang.Object

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

Constructor Detail

Builder

public Builder(Schema schema,
               BufferAllocator bufferAllocator)

Method Detail

renameFieldVector

public VectorSchemaRootTransformer.Builder renameFieldVector(String originalVectorName,
                                                             String transformedVectorName)

Add task to transform a vector to a new vector renaming it. This also adds transformedVectorName to the transformed VectorSchemaRoot schema.

Parameters:

originalVectorName - Name of the original vector to be transformed.

transformedVectorName - Name of the vector that is the result of the transformation.

Returns:

a VectorSchemaRoot instance with a task to rename a field vector.

addEmptyField

public VectorSchemaRootTransformer.Builder addEmptyField(String fieldName,
                                                         Types.MinorType fieldType)

Adds an empty field to the transformed VectorSchemaRoot schema.

Parameters:

fieldName - Name of the field to be added.

fieldType - Type of the field to be added.

Returns:

a VectorSchemaRoot instance with the current tasks.

addEmptyField

public VectorSchemaRootTransformer.Builder addEmptyField(String fieldName,
                                                         ArrowType fieldType)

Adds an empty field to the transformed VectorSchemaRoot schema.

Parameters:

fieldName - Name of the field to be added.

fieldType - Type of the field to be added.

Returns:

a VectorSchemaRoot instance with the current tasks.

build

public VectorSchemaRootTransformer build()