Package org.apache.beam.sdk.schemas.transforms

Class Cast.Narrowing

java.lang.Object

org.apache.beam.sdk.schemas.transforms.Cast.Narrowing

All Implemented Interfaces:

Serializable, Cast.Validator

Enclosing class:

Cast<T>

public static class Cast.Narrowing
extends Object
implements Cast.Validator

Narrowing changes type without guarantee to preserve data.

Standard narrowing conversions:

• any conversions of Cast.Widening
• conversions the opposite to Cast.Widening

Row narrowing

• wider schema to schema with a subset of fields
• non-nullable fields to nullable fields
• nullable fields to non-nullable fields

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Narrowing()

Method Summary

Modifier and Type	Method	Description
List<Cast.CompatibilityError>	apply(Schema input, Schema output)
static Cast.Narrowing	of()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

Narrowing

public Narrowing()

Method Details

of

public static Cast.Narrowing of()

toString

public String toString()

Overrides:

toString in class Object

apply

public List<Cast.CompatibilityError> apply(Schema input,
 Schema output)

Specified by:

apply in interface Cast.Validator