com.facebook.presto.common.block

Class BlockUtil

java.lang.Object

com.facebook.presto.common.block.BlockUtil

public final class BlockUtil
extends Object

Method Summary

Modifier and Type	Method and Description
static boolean[]	compactArray(boolean[] array, int index, int length) Returns an array containing elements in the specified range of the specified array.
static byte[]	compactArray(byte[] array, int index, int length)
static int[]	compactArray(int[] array, int index, int length)
static long[]	compactArray(long[] array, int index, int length)
static short[]	compactArray(short[] array, int index, int length)
static byte[]	ensureCapacity(byte[] buffer, int capacity) Returns a byte array of size capacity if the input buffer is null or smaller than the capacity.
static int[]	ensureCapacity(int[] buffer, int capacity) Returns an int array of size capacity if the input buffer is null or smaller than the capacity.
static long[]	ensureCapacity(long[] buffer, int capacity) Returns a long array of size capacity if the input buffer is null or smaller than the capacity.
static short[]	ensureCapacity(short[] buffer, int capacity) Returns a short array of size capacity if the input buffer is null or smaller than the capacity.
static int	getNum128Integers(int length)
static boolean	internalPositionInRange(int internalPosition, int offset, int positionCount)

Methods inherited from class java.lang.Object

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

Method Detail

compactArray

public static boolean[] compactArray(boolean[] array,
                                     int index,
                                     int length)

Returns an array containing elements in the specified range of the specified array. If the range matches the entire array, the input array will be returned. Otherwise, a copy will be returned.

compactArray

public static byte[] compactArray(byte[] array,
                                  int index,
                                  int length)

compactArray

public static short[] compactArray(short[] array,
                                   int index,
                                   int length)

compactArray

public static int[] compactArray(int[] array,
                                 int index,
                                 int length)

compactArray

public static long[] compactArray(long[] array,
                                  int index,
                                  int length)

internalPositionInRange

public static boolean internalPositionInRange(int internalPosition,
                                              int offset,
                                              int positionCount)

ensureCapacity

public static byte[] ensureCapacity(byte[] buffer,
                                    int capacity)

Returns a byte array of size capacity if the input buffer is null or smaller than the capacity. If the input buffer is not null, the original values in buffer will be preserved.

ensureCapacity

public static short[] ensureCapacity(short[] buffer,
                                     int capacity)

Returns a short array of size capacity if the input buffer is null or smaller than the capacity. If the input buffer is not null, the original values in buffer will be preserved.

ensureCapacity

public static int[] ensureCapacity(int[] buffer,
                                   int capacity)

Returns an int array of size capacity if the input buffer is null or smaller than the capacity. If the input buffer is not null, the original values in buffer will be preserved.

ensureCapacity

public static long[] ensureCapacity(long[] buffer,
                                    int capacity)

Returns a long array of size capacity if the input buffer is null or smaller than the capacity. If the input buffer is not null, the original values in buffer will be preserved.

getNum128Integers

public static int getNum128Integers(int length)