MappingUtil

java.lang.Object

org.apache.iceberg.mapping.MappingUtil

public class MappingUtil extends Object

Method Summary

Modifier and Type

Method

Description

static NameMapping

create(Schema schema)

Create a name-based mapping for a schema.

static NameMapping

update(NameMapping mapping, Map<Integer,Types.NestedField> updates, org.apache.iceberg.relocated.com.google.common.collect.Multimap<Integer,Integer> 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 Details
- 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, Map<Integer,Types.NestedField> updates, org.apache.iceberg.relocated.com.google.common.collect.Multimap<Integer,Integer> 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