fr.inria.atlanmod.neoemf.data.hbase.util

Class HBaseEncoderUtil

java.lang.Object

fr.inria.atlanmod.neoemf.data.hbase.util.HBaseEncoderUtil

public class HBaseEncoderUtil
extends Object

Utility class that is responsible of Object to Byte encoding. This class is used to ensure that HBase keys have the same size, and provides an uniformized API to encode strings and EReference.

Field Summary

Fields

Modifier and Type	Field and Description
static int	UUID_LENGTH Expected length (in bytes) of stored elements.
static char	VALUE_SEPERATOR_DEFAULT The default separator used to serialize Collections.

Constructor Summary

Constructors

Constructor and Description
HBaseEncoderUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	toBytes(String[] strings) Encodes an array of Strings into an array of bytes that can be stored in the database.
static byte[]	toBytesReferences(String[] strings) Encodes the provided String array into an array of bytes that can be stored in the database.
static String[]	toStrings(byte[] bytes) Decodes an array of bytes into an array of Strings.
static String[]	toStringsReferences(byte[] value) Decodes the provided byte array into an array of String representing EReferences.

Methods inherited from class java.lang.Object

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

Field Detail

UUID_LENGTH

public static final int UUID_LENGTH

Expected length (in bytes) of stored elements.

See Also:

Constant Field Values

VALUE_SEPERATOR_DEFAULT

public static final char VALUE_SEPERATOR_DEFAULT

The default separator used to serialize Collections.

See Also:

Constant Field Values

Constructor Detail

HBaseEncoderUtil

public HBaseEncoderUtil()

Method Detail

toStringsReferences

public static String[] toStringsReferences(byte[] value)

Decodes the provided byte array into an array of String representing EReferences.

Parameters:

value - the HBase value to decode

Returns:

an array of Strings representing the EReferences decoded from the database

Throws:

NullPointerException - if the given value is null

IllegalArgumentException - if the length of value is not a multiple of UUID_LENGTH

See Also:

toBytesReferences(String[])

toBytesReferences

public static byte[] toBytesReferences(String[] strings)

Encodes the provided String array into an array of bytes that can be stored in the database.

Parameters:

strings - an array of Strings representing the EReferences to encode.

Returns:

an array of bytes

Throws:

NullPointerException - if the value to encode is null

See Also:

toStringsReferences(byte[])

toBytes

public static byte[] toBytes(String[] strings)

Encodes an array of Strings into an array of bytes that can be stored in the database.

Parameters:

strings - the array to encode

Returns:

the encoded byte array

See Also:

toStrings(byte[])

toStrings

public static String[] toStrings(byte[] bytes)

Decodes an array of bytes into an array of Strings.

Parameters:

bytes - the byte array to decode

Returns:

the decoded String array

Throws:

NullPointerException - if the given array is null

See Also:

toBytes(String[])