Class Bytes
- java.lang.Object
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- org.apache.cassandra.cql3.functions.types.utils.Bytes
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public final class Bytes extends java.lang.Object
Simple utility methods to make working with bytes (blob) easier.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.nio.ByteBuffer
fromHexString(java.lang.String str)
Parse an hex string representing a CQL blob.static byte[]
getArray(java.nio.ByteBuffer bytes)
Extract the content of the providedByteBuffer
as a byte array.static java.lang.String
toHexString(byte[] byteArray)
Converts a blob to its CQL hex string representation.static java.lang.String
toHexString(java.nio.ByteBuffer bytes)
Converts a blob to its CQL hex string representation.
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Method Detail
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toHexString
public static java.lang.String toHexString(java.nio.ByteBuffer bytes)
Converts a blob to its CQL hex string representation.A CQL blob string representation consist of the hexadecimal representation of the blob bytes prefixed by "0x".
- Parameters:
bytes
- the blob/bytes to convert to a string.- Returns:
- the CQL string representation of
bytes
. Ifbytes
isnull
, this method returnsnull
.
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toHexString
public static java.lang.String toHexString(byte[] byteArray)
Converts a blob to its CQL hex string representation.A CQL blob string representation consist of the hexadecimal representation of the blob bytes prefixed by "0x".
- Parameters:
byteArray
- the blob/bytes array to convert to a string.- Returns:
- the CQL string representation of
bytes
. Ifbytes
isnull
, this method returnsnull
.
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fromHexString
public static java.nio.ByteBuffer fromHexString(java.lang.String str)
Parse an hex string representing a CQL blob.The input should be a valid representation of a CQL blob, i.e. it must start by "0x" followed by the hexadecimal representation of the blob bytes.
- Parameters:
str
- the CQL blob string representation to parse.- Returns:
- the bytes corresponding to
str
. Ifstr
isnull
, this method returnsnull
. - Throws:
java.lang.IllegalArgumentException
- ifstr
is not a valid CQL blob string.
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getArray
public static byte[] getArray(java.nio.ByteBuffer bytes)
Extract the content of the providedByteBuffer
as a byte array.This method work with any type of
ByteBuffer
(direct and non-direct ones), but when theByteBuffer
is backed by an array, this method will try to avoid copy when possible. As a consequence, changes to the returned byte array may or may not reflect into the initialByteBuffer
.- Parameters:
bytes
- the buffer whose content to extract.- Returns:
- a byte array with the content of
bytes
. That array may be the array backingbytes
if this can avoid a copy.
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