Package org.apache.iceberg.schema

Class UnionByNameVisitor

java.lang.Object

org.apache.iceberg.schema.SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>

org.apache.iceberg.schema.UnionByNameVisitor

public class UnionByNameVisitor
extends SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>

Visitor class that accumulates the set of changes needed to evolve an existing schema into the union of the existing and a new schema. Changes are added to an UpdateSchema operation.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.iceberg.schema.SchemaWithPartnerVisitor

SchemaWithPartnerVisitor.PartnerAccessors<P>

Method Summary

Modifier and Type	Method	Description
java.lang.Boolean	field(Types.NestedField field, java.lang.Integer partnerId, java.lang.Boolean isFieldMissing)
java.lang.Boolean	list(Types.ListType list, java.lang.Integer partnerId, java.lang.Boolean isElementMissing)
java.lang.Boolean	map(Types.MapType map, java.lang.Integer partnerId, java.lang.Boolean isKeyMissing, java.lang.Boolean isValueMissing)
java.lang.Boolean	primitive(Type.PrimitiveType primitive, java.lang.Integer partnerId)
java.lang.Boolean	struct(Types.StructType struct, java.lang.Integer partnerId, java.util.List<java.lang.Boolean> missingPositions)
static void	visit(UpdateSchema api, Schema existingSchema, Schema newSchema)	Adds changes needed to produce a union of two schemas to an UpdateSchema operation.

Methods inherited from class org.apache.iceberg.schema.SchemaWithPartnerVisitor

afterField, afterListElement, afterMapKey, afterMapValue, beforeField, beforeListElement, beforeMapKey, beforeMapValue, schema, visit, visit

Methods inherited from class java.lang.Object

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

Method Detail

visit

public static void visit(UpdateSchema api,
                         Schema existingSchema,
                         Schema newSchema)

Adds changes needed to produce a union of two schemas to an UpdateSchema operation.

Changes are accumulated to evolve the existingSchema into a union with newSchema.

Parameters:

api - an UpdateSchema for adding changes

existingSchema - an existing schema

newSchema - a new schema to compare with the existing

struct

public java.lang.Boolean struct(Types.StructType struct,
                                java.lang.Integer partnerId,
                                java.util.List<java.lang.Boolean> missingPositions)

Overrides:

struct in class SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>

field

public java.lang.Boolean field(Types.NestedField field,
                               java.lang.Integer partnerId,
                               java.lang.Boolean isFieldMissing)

Overrides:

field in class SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>

list

public java.lang.Boolean list(Types.ListType list,
                              java.lang.Integer partnerId,
                              java.lang.Boolean isElementMissing)

Overrides:

list in class SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>

map

public java.lang.Boolean map(Types.MapType map,
                             java.lang.Integer partnerId,
                             java.lang.Boolean isKeyMissing,
                             java.lang.Boolean isValueMissing)

Overrides:

map in class SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>

primitive

public java.lang.Boolean primitive(Type.PrimitiveType primitive,
                                   java.lang.Integer partnerId)

Overrides:

primitive in class SchemaWithPartnerVisitor<java.lang.Integer,java.lang.Boolean>