de.zib.scalaris.examples

Class ErlangValueFastString

java.lang.Object

de.zib.scalaris.ErlangValue

de.zib.scalaris.examples.ErlangValueFastString

All Implemented Interfaces:

Comparable<ErlangValue>

public class ErlangValueFastString
extends ErlangValue

Implements a faster String storage mechanism if only Java access to scalaris is used.

Uses OtpErlangBinary objects that store the array of bytes a String consists of and writes this binary to scalaris wrapped into a OtpErlangTuple. Trying to read strings will convert a returned OtpErlangBinary to a String or return the value of a OtpErlangString result.

Run a benchmark of the different String implementations with java -cp scalaris-examples.jar de.zib.scalaris.examples.FastStringBenchmark

Since:

2.9

Version:

2.9

Author:

Nico Kruber, kruber@zib.de

Nested Class Summary

Nested classes/interfaces inherited from class de.zib.scalaris.ErlangValue

ErlangValue.ListElementConverter<T>, ErlangValue.StringListElementConverter

Constructor Summary

Constructors

Constructor and Description
ErlangValueFastString(ErlangValue value) Creates an object with the given (erlang) value.
ErlangValueFastString(OtpErlangObject otpValue) Creates an object with the given (erlang) value.
ErlangValueFastString(String value) Creates an object with the given (Java) value.

Method Summary

Methods

Modifier and Type	Method and Description
String	stringValue() Converts the stored erlang value created by this object to a Java String.

Methods inherited from class de.zib.scalaris.ErlangValue

bigIntValue, binaryListValue, binaryValue, boolValue, compareTo, convertToErlang, doubleListValue, doubleValue, equals, hashCode, intValue, jsonListValue, jsonValue, jsonValue, listCollectionValue, listCollectionValue, listValue, listValue, longListValue, longValue, otpObjectToOtpList, stringListValue, toString, value

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ErlangValueFastString

public ErlangValueFastString(String value)

Creates an object with the given (Java) value.

Parameters:

value - the value to use

ErlangValueFastString

public ErlangValueFastString(OtpErlangObject otpValue)

Creates an object with the given (erlang) value.

Parameters:

otpValue - the value to use

ErlangValueFastString

public ErlangValueFastString(ErlangValue value)

Creates an object with the given (erlang) value. Provided for convenience.

Parameters:

value - the value to use

See Also:

ErlangValue

Method Detail

stringValue

public String stringValue()

Converts the stored erlang value created by this object to a Java String.

Overrides:

stringValue in class ErlangValue

Returns:

the converted value

Throws:

ClassCastException - if the conversion fails