org.apache.iceberg.util

Class StructProjection

java.lang.Object

org.apache.iceberg.util.StructProjection

All Implemented Interfaces:

StructLike

public class StructProjection
extends java.lang.Object
implements StructLike

Method Summary

Modifier and Type	Method and Description
static StructProjection	create(Schema dataSchema, Schema projectedSchema) Creates a projecting wrapper for StructLike rows.
static StructProjection	create(Schema schema, java.util.Set<java.lang.Integer> ids) Creates a projecting wrapper for StructLike rows.
static StructProjection	create(Types.StructType structType, Types.StructType projectedStructType) Creates a projecting wrapper for StructLike rows.
static StructProjection	createAllowMissing(Types.StructType structType, Types.StructType projectedStructType) Creates a projecting wrapper for StructLike rows.
<T> T	get(int pos, java.lang.Class<T> javaClass)
<T> void	set(int pos, T value)
int	size()
StructProjection	wrap(StructLike newStruct)

Methods inherited from class java.lang.Object

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

Method Detail

create

public static StructProjection create(Schema schema,
                                      java.util.Set<java.lang.Integer> ids)

Creates a projecting wrapper for StructLike rows.

This projection does not work with repeated types like lists and maps.

Parameters:

schema - schema of rows wrapped by this projection

ids - field ids from the row schema to project

Returns:

a wrapper to project rows

create

public static StructProjection create(Schema dataSchema,
                                      Schema projectedSchema)

Creates a projecting wrapper for StructLike rows.

This projection does not work with repeated types like lists and maps.

Parameters:

dataSchema - schema of rows wrapped by this projection

projectedSchema - result schema of the projected rows

Returns:

a wrapper to project rows

create

public static StructProjection create(Types.StructType structType,
                                      Types.StructType projectedStructType)

Creates a projecting wrapper for StructLike rows.

This projection does not work with repeated types like lists and maps.

Parameters:

structType - type of rows wrapped by this projection

projectedStructType - result type of the projected rows

Returns:

a wrapper to project rows

createAllowMissing

public static StructProjection createAllowMissing(Types.StructType structType,
                                                  Types.StructType projectedStructType)

Creates a projecting wrapper for StructLike rows.

This projection allows missing fields and does not work with repeated types like lists and maps.

Parameters:

structType - type of rows wrapped by this projection

projectedStructType - result type of the projected rows

Returns:

a wrapper to project rows

wrap

public StructProjection wrap(StructLike newStruct)

size

public int size()

Specified by:

size in interface StructLike

get

public <T> T get(int pos,
                 java.lang.Class<T> javaClass)

Specified by:

get in interface StructLike

set

public <T> void set(int pos,
                    T value)

Specified by:

set in interface StructLike