org.apache.iceberg.mapping

Class MappingUtil

java.lang.Object

org.apache.iceberg.mapping.MappingUtil

public class MappingUtil
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static NameMapping	create(Schema schema) Create a name-based mapping for a schema.
static NameMapping	update(NameMapping mapping, java.util.Map<java.lang.Integer,Types.NestedField> updates, org.apache.iceberg.relocated.com.google.common.collect.Multimap<java.lang.Integer,Types.NestedField> adds) Update a name-based mapping using changes to a schema.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static NameMapping create(Schema schema)

Create a name-based mapping for a schema.

The mapping returned by this method will use the schema's name for each field.

Parameters:

schema - a Schema

Returns:

a NameMapping initialized with the schema's fields and names

update

public static NameMapping update(NameMapping mapping,
                                 java.util.Map<java.lang.Integer,Types.NestedField> updates,
                                 org.apache.iceberg.relocated.com.google.common.collect.Multimap<java.lang.Integer,Types.NestedField> adds)

Update a name-based mapping using changes to a schema.

Parameters:

mapping - a name-based mapping

updates - a map from field ID to updated field definitions

adds - a map from parent field ID to nested fields to be added

Returns:

an updated mapping with names added to renamed fields and the mapping extended for new fields