org.apache.beam.sdk.util

Class StringUtils

java.lang.Object

org.apache.beam.sdk.util.StringUtils

@Internal
public class StringUtils
extends java.lang.Object

Utilities for working with JSON and other human-readable string formats.

Constructor Summary

Constructors

Constructor and Description
StringUtils()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	byteArrayToJsonString(byte[] bytes) Converts the given array of bytes into a legal JSON string.
static int	getLevenshteinDistance(java.lang.String s, java.lang.String t) Calculate the Levenshtein distance between two strings.
static byte[]	jsonStringToByteArray(java.lang.String string) Converts the given string, encoded using byteArrayToJsonString(byte[]), into a byte array.

Methods inherited from class java.lang.Object

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

Constructor Detail

StringUtils

public StringUtils()

Method Detail

byteArrayToJsonString

public static java.lang.String byteArrayToJsonString(byte[] bytes)

Converts the given array of bytes into a legal JSON string.

Uses a simple strategy of converting each byte to a single char, except for non-printable chars, non-ASCII chars, and '%', '\', and '"', which are encoded as three chars in '%xx' format, where 'xx' is the hexadecimal encoding of the byte.

jsonStringToByteArray

public static byte[] jsonStringToByteArray(java.lang.String string)

Converts the given string, encoded using byteArrayToJsonString(byte[]), into a byte array.

Throws:

java.lang.IllegalArgumentException - if the argument string is not legal

getLevenshteinDistance

public static int getLevenshteinDistance(java.lang.String s,
                                         java.lang.String t)

Calculate the Levenshtein distance between two strings.

The Levenshtein distance between two words is the minimum number of single-character edits (i.e. insertions, deletions or substitutions) required to change one string into the other.