Package org.exoplatform.social.core.storage.impl

Class StorageUtils

java.lang.Object

org.exoplatform.social.core.storage.impl.StorageUtils

public class StorageUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ASTERISK_STR
static final String	EMPTY_STR
static final DateTimeFormatter	RFC_3339_FORMATTER

Constructor Summary

Constructors

Constructor	Description
StorageUtils()

Method Summary

Modifier and Type	Method	Description
static String	escapeJsonValue(String value)	Escapes a value written between the quotes of a JSON string of a query built as text, so that a quote, a backslash or a control character in the value reaches Elasticsearch as that character.
static String	escapeSearchText(String text)	Escapes a searched text for the JSON string of an analyzed query: normalizeSearchText(String) then escapeJsonValue(String).
static String	fillQueryTemplate(String template, Map<String,String> values)	Fills a query template in one pass: each @name@ placeholder of the template is replaced by its value, and a placeholder's name found inside a value, such as a searched @limit@, is written as is.
static String	normalizeSearchText(String text)	Prepares a searched text for an analyzed Elasticsearch query (a match query): the Latin combining diacritics are removed, as the index analyzers' asciifolding does, because the ngram fields' search analyzer (space display name, category name) folds nothing.
static Date	parseRFC3339Date(String dateString)
static <T> List<T>	subList(List<T> list, int startIndex, int toIndex)	Gets sub list from the provided list with start and end index.
static String	toRFC3339Date(Date dateTime)

Methods inherited from class java.lang.Object

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

Field Details

ASTERISK_STR

public static final String ASTERISK_STR

See Also:

• Constant Field Values

EMPTY_STR

public static final String EMPTY_STR

See Also:

• Constant Field Values

RFC_3339_FORMATTER

public static final DateTimeFormatter RFC_3339_FORMATTER

Constructor Details

StorageUtils

public StorageUtils()

Method Details

subList

public static <T> List<T> subList(List<T> list,
 int startIndex,
 int toIndex)

Gets sub list from the provided list with start and end index.

Parameters:

list - the identity list

startIndex - start index to get

toIndex - end index to get

Returns:

sub list of the provided list

toRFC3339Date

public static String toRFC3339Date(Date dateTime)

parseRFC3339Date

public static Date parseRFC3339Date(String dateString)

normalizeSearchText

public static String normalizeSearchText(String text)

Prepares a searched text for an analyzed Elasticsearch query (a match query): the Latin combining diacritics are removed, as the index analyzers' asciifolding does, because the ngram fields' search analyzer (space display name, category name) folds nothing. The text is decomposed (NFD) to find them and recomposed (NFC) afterwards, so that a Hangul syllable or a kana with a sound mark, which NFD also decomposes, is searched as typed. Nothing else is changed: the field's search analyzer splits the text into the tokens the index holds, and a text with no token matches nothing.

Parameters:

text - searched text, as typed

Returns:

the text to search, trimmed; null when the text is null

escapeJsonValue

public static String escapeJsonValue(String value)

Escapes a value written between the quotes of a JSON string of a query built as text, so that a quote, a backslash or a control character in the value reaches Elasticsearch as that character.

Parameters:

value - value to write

Returns:

the escaped value, null when the value is null

escapeSearchText

public static String escapeSearchText(String text)

Escapes a searched text for the JSON string of an analyzed query: normalizeSearchText(String) then escapeJsonValue(String).

Parameters:

text - searched text, as typed

Returns:

the text to write between the quotes of the query JSON string

fillQueryTemplate

public static String fillQueryTemplate(String template,
 Map<String,String> values)

Fills a query template in one pass: each @name@ placeholder of the template is replaced by its value, and a placeholder's name found inside a value, such as a searched @limit@, is written as is. A placeholder the values do not name is replaced by an empty string.

Parameters:

template - query template holding @name@ placeholders

values - value of each placeholder, by name without the @

Returns:

the filled query