org.apache.datasketches

Class ArrayOfStringsSerDe

java.lang.Object

org.apache.datasketches.ArrayOfItemsSerDe<String>

org.apache.datasketches.ArrayOfStringsSerDe

public class ArrayOfStringsSerDe
extends ArrayOfItemsSerDe<String>

Methods of serializing and deserializing arrays of String. This class serializes strings in UTF-8 format, which is more compact compared to ArrayOfUtf16StringsSerDe. In an extreme case when all strings are in ASCII, this method is 2 times more compact, but it takes more time to encode and decode by a factor of 1.5 to 2.

Author:

Alexander Saydakov

Constructor Summary

Constructors

Constructor and Description
ArrayOfStringsSerDe()

Method Summary

Modifier and Type	Method and Description
String[]	deserializeFromMemory(org.apache.datasketches.memory.Memory mem, int numItems) Deserialize an array of items from a given Memory object.
byte[]	serializeToByteArray(String[] items) Serialize an array of items to byte array.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayOfStringsSerDe

public ArrayOfStringsSerDe()

Method Detail

serializeToByteArray

public byte[] serializeToByteArray(String[] items)

Description copied from class: ArrayOfItemsSerDe

Serialize an array of items to byte array. The size of the array doesn't need to be serialized. This method is called by the sketch serialization process.

Specified by:

serializeToByteArray in class ArrayOfItemsSerDe<String>

Parameters:

items - array of items to be serialized

Returns:

serialized representation of the given array of items

deserializeFromMemory

public String[] deserializeFromMemory(org.apache.datasketches.memory.Memory mem,
                                      int numItems)

Description copied from class: ArrayOfItemsSerDe

Deserialize an array of items from a given Memory object. This method is called by the sketch deserialization process.

Specified by:

deserializeFromMemory in class ArrayOfItemsSerDe<String>

Parameters:

mem - Memory containing a serialized array of items

numItems - number of items in the serialized array

Returns:

deserialized array of items