Module org.postgresql.pljava.internal

Package org.postgresql.pljava.pg

Class DatumUtils

java.lang.Object

org.postgresql.pljava.pg.DatumUtils

public class DatumUtils
extends Object

Implementations of Datum.Accessor and a collection of related static methods.

Constructor Summary

Constructors

Constructor	Description
DatumUtils()

Method Summary

Modifier and Type	Method	Description
static long	addressOf(ByteBuffer bb)
static ByteBuffer	asReadOnlyNativeOrder(ByteBuffer bb)
static long	fetchPointer(ByteBuffer bb, int offset)
static TupleTableSlot.Indexed	indexedTupleSlot(RegType type, int elements, ByteBuffer nulls, ByteBuffer values)
static int	inspectVarlena(ByteBuffer bb, int offset)	For now, just return the inline size (the size to be skipped if stepping over this varlena in a heap tuple).
static ByteBuffer	mapCString(ByteBuffer bb, int offset)
static ByteBuffer	mapFixedLength(ByteBuffer bb, int offset, int length)
static void	storePointer(ByteBuffer bb, int offset, long value)

Methods inherited from class java.lang.Object

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

Constructor Details

DatumUtils

public DatumUtils()

Method Details

indexedTupleSlot

public static TupleTableSlot.Indexed indexedTupleSlot(RegType type,
 int elements,
 ByteBuffer nulls,
 ByteBuffer values)

addressOf

public static long addressOf(ByteBuffer bb)

fetchPointer

public static long fetchPointer(ByteBuffer bb,
 int offset)

storePointer

public static void storePointer(ByteBuffer bb,
 int offset,
 long value)

asReadOnlyNativeOrder

public static ByteBuffer asReadOnlyNativeOrder(ByteBuffer bb)

mapFixedLength

public static ByteBuffer mapFixedLength(ByteBuffer bb,
 int offset,
 int length)

mapCString

public static ByteBuffer mapCString(ByteBuffer bb,
 int offset)

inspectVarlena

public static int inspectVarlena(ByteBuffer bb,
 int offset)

For now, just return the inline size (the size to be skipped if stepping over this varlena in a heap tuple).

This is a reimplementation of some of the top of postgres.h, so that this common operation can be done without a JNI call to the C code.