Interface StructAccessor

All Superinterfaces:

FieldAccessor

All Known Subinterfaces:

PqStruct, RowReader

public interface StructAccessor
extends FieldAccessor

Parquet-struct access interface. Extends FieldAccessor with complex getters specific to the Parquet schema-typed world (nested structs, lists, maps) and with index-based mirrors of the FieldAccessor by-name accessors.

Variant objects do not expose these methods — use PqVariantObject for Variant navigation. By-index access lives here rather than on FieldAccessor because the "field index" is meaningful for struct-shaped accessors (the position among the projected children, in the order the projection requests them) but not for Variant objects (whose field order is lexicographic on the metadata key dictionary and rarely matches what a caller would consider "first" / "second").

This interface makes no assumptions about mutability or lifecycle, allowing code to work polymorphically with both RowReader (a stateful, mutable view over the current row) and PqStruct (a flyweight over a nested struct position).

See Also:

• PqStruct
• RowReader

Method Summary

Modifier and Type	Method	Description
byte[]	getBinary(int fieldIndex)	Get a BINARY field value by field index.
boolean	getBoolean(int fieldIndex)	Get a BOOLEAN field value by field index.
LocalDate	getDate(int fieldIndex)	Get a DATE field value by field index.
BigDecimal	getDecimal(int fieldIndex)	Get a DECIMAL field value by field index.
double	getDouble(int fieldIndex)	Get a DOUBLE field value by field index.
float	getFloat(int fieldIndex)	Get a FLOAT field value by field index.
int	getInt(int fieldIndex)	Get an INT32 field value by field index.
PqInterval	getInterval(int fieldIndex)	Get an INTERVAL field value by field index.
PqList	getList(int fieldIndex)	Get a LIST field value by field index.
PqList	getList(String name)	Get a LIST field value by name.
LocalDateTime	getLocalTimestamp(int fieldIndex)	Get a local-wall-clock TIMESTAMP field value by field index.
long	getLong(int fieldIndex)	Get an INT64 field value by field index.
PqMap	getMap(int fieldIndex)	Get a MAP field value by field index.
PqMap	getMap(String name)	Get a MAP field value by name.
Object	getRawValue(int fieldIndex)	Get a field value by field index as its raw physical representation.
String	getString(int fieldIndex)	Get a STRING field value by field index.
PqStruct	getStruct(int fieldIndex)	Get a nested struct field value by field index.
PqStruct	getStruct(String name)	Get a nested struct field value by name.
LocalTime	getTime(int fieldIndex)	Get a TIME field value by field index.
Instant	getTimestamp(int fieldIndex)	Get a TIMESTAMP field value by field index.
UUID	getUuid(int fieldIndex)	Get a UUID field value by field index.
Object	getValue(int fieldIndex)	Get a field value by field index, decoded to its logical-type representation.
PqVariant	getVariant(int fieldIndex)	Get a VARIANT field value by field index.
boolean	isNull(int fieldIndex)	Check if a field is null by field index.

Methods inherited from interface FieldAccessor

getBinary, getBoolean, getDate, getDecimal, getDouble, getFieldCount, getFieldName, getFloat, getInt, getInterval, getLocalTimestamp, getLong, getRawValue, getString, getTime, getTimestamp, getUuid, getValue, getVariant, isNull

Method Details

getStruct

PqStruct getStruct(String name)

Get a nested struct field value by name.

Parameters:

name - the field name

Returns:

the nested struct, or null if the field is null

getList

PqList getList(String name)

Get a LIST field value by name.

Parameters:

name - the field name

Returns:

the list, or null if the field is null

getMap

PqMap getMap(String name)

Get a MAP field value by name.

Parameters:

name - the field name

Returns:

the map, or null if the field is null

getInt

int getInt(int fieldIndex)

Get an INT32 field value by field index. See FieldAccessor.getInt(String).

getLong

long getLong(int fieldIndex)

Get an INT64 field value by field index. See FieldAccessor.getLong(String).

getFloat

float getFloat(int fieldIndex)

Get a FLOAT field value by field index. See FieldAccessor.getFloat(String).

getDouble

double getDouble(int fieldIndex)

Get a DOUBLE field value by field index. See FieldAccessor.getDouble(String).

getBoolean

boolean getBoolean(int fieldIndex)

Get a BOOLEAN field value by field index. See FieldAccessor.getBoolean(String).

getString

String getString(int fieldIndex)

Get a STRING field value by field index. See FieldAccessor.getString(String).

getBinary

byte[] getBinary(int fieldIndex)

Get a BINARY field value by field index. See FieldAccessor.getBinary(String).

getDate

LocalDate getDate(int fieldIndex)

Get a DATE field value by field index. See FieldAccessor.getDate(String).

getTime

LocalTime getTime(int fieldIndex)

Get a TIME field value by field index. See FieldAccessor.getTime(String).

getTimestamp

Instant getTimestamp(int fieldIndex)

Get a TIMESTAMP field value by field index. See FieldAccessor.getTimestamp(String).

getLocalTimestamp

LocalDateTime getLocalTimestamp(int fieldIndex)

Get a local-wall-clock TIMESTAMP field value by field index. See FieldAccessor.getLocalTimestamp(String).

getDecimal

BigDecimal getDecimal(int fieldIndex)

Get a DECIMAL field value by field index. See FieldAccessor.getDecimal(String).

getUuid

UUID getUuid(int fieldIndex)

Get a UUID field value by field index. See FieldAccessor.getUuid(String).

getInterval

PqInterval getInterval(int fieldIndex)

Get an INTERVAL field value by field index. See FieldAccessor.getInterval(String).

getVariant

PqVariant getVariant(int fieldIndex)

Get a VARIANT field value by field index. See FieldAccessor.getVariant(String).

getStruct

PqStruct getStruct(int fieldIndex)

Get a nested struct field value by field index. See getStruct(String).

getList

PqList getList(int fieldIndex)

Get a LIST field value by field index. See getList(String).

getMap

PqMap getMap(int fieldIndex)

Get a MAP field value by field index. See getMap(String).

getValue

Object getValue(int fieldIndex)

Get a field value by field index, decoded to its logical-type representation. See FieldAccessor.getValue(String).

getRawValue

Object getRawValue(int fieldIndex)

Get a field value by field index as its raw physical representation. See FieldAccessor.getRawValue(String).

isNull

boolean isNull(int fieldIndex)

Check if a field is null by field index. See FieldAccessor.isNull(String).