Package ucar.nc2.filter

Class FilterHelpers

java.lang.Object

ucar.nc2.filter.FilterHelpers

public class FilterHelpers
extends Object

Constructor Summary

Constructors

Constructor	Description
FilterHelpers()

Method Summary

Modifier and Type	Method	Description
static byte[]	arrayToBytes(Array arr, DataType type, ByteOrder order)
static Array	bytesToArray(byte[] in, DataType type, ByteOrder order)
static DataType	getAttributeDataType(Attribute attribute, DataType.Signedness signedness)
static DataType	largestOf(DataType... dataTypes)
static DataType	nextLarger(DataType dataType)	Returns the smallest numeric data type that: can hold a larger integer than dataType can if integral, has the same signedness as dataType
static int	rank(DataType dataType)

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterHelpers

public FilterHelpers()

Method Detail

bytesToArray

public static Array bytesToArray(byte[] in,
                                 DataType type,
                                 ByteOrder order)

arrayToBytes

public static byte[] arrayToBytes(Array arr,
                                  DataType type,
                                  ByteOrder order)

nextLarger

public static DataType nextLarger(DataType dataType)

Returns the smallest numeric data type that:

1. can hold a larger integer than dataType can
2. if integral, has the same signedness as dataType

Argument	Result
BYTE	SHORT
UBYTE	USHORT
SHORT	INT
USHORT	UINT
INT	LONG
UINT	ULONG
LONG	DOUBLE
ULONG	DOUBLE
Any other data type	Just return argument

The returned type is intended to be just big enough to hold the result of performing an unsigned conversion of a value of the smaller type. For example, the byte value -106 equals 150 when interpreted as unsigned. That won't fit in a (signed) byte, but it will fit in a short.

Parameters:

dataType - an integral data type.

Returns:

the next larger type.

getAttributeDataType

public static DataType getAttributeDataType(Attribute attribute,
                                            DataType.Signedness signedness)

rank

public static int rank(DataType dataType)

largestOf

public static DataType largestOf(DataType... dataTypes)