com.gisgraphy.helper

Class StringHelper

java.lang.Object

com.gisgraphy.helper.StringHelper

public class StringHelper
extends Object

Provide some usefull method to compute string for autocompletion and fulltextsearch

Author:

David Masclet

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	logger
static int	MAX_STRING_INDEXABLE_LENGTH
static char	WHITESPACE_CHAR_DELIMITER

Constructor Summary

Constructors

Constructor and Description
StringHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static String	getStackTraceAsString(Throwable aThrowable)
static boolean	isEmptyString(String string) Usefull method to be compatible with jdk1.5 (jdk 1.6 already have this method)
static boolean	isNotEmptyString(String string) Usefull method to be compatible with jdk1.5 (jdk 1.6 already have this method)
static String	normalize(String originalString) Process a string to apply filter as lucene and solr does : - remove accent - lowercase - word delimiter ('-', '.'
static String	splitCamelCase(String s)
static String	transformStringForPartialWordIndexation(String originalString, char delimiter) Process a string to in order to be stored in a specific postgres field to allow the index usage for ilike (ilike(%String%): e.g : 'it s ok'=> s ok, s o, it s, t s o, t s, it s ok, ok, it s o, it, t s ok it remove duplicates and don't put single character.
static String	transformStringForPartialWordSearch(String originalString, char delimiter)
static OpenStreetMap	updateOpenStreetMapEntityForIndexation(OpenStreetMap openStreetMap)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_STRING_INDEXABLE_LENGTH

public static final int MAX_STRING_INDEXABLE_LENGTH

See Also:

Constant Field Values

WHITESPACE_CHAR_DELIMITER

public static final char WHITESPACE_CHAR_DELIMITER

See Also:

Constant Field Values

logger

protected static final org.slf4j.Logger logger

Constructor Detail

StringHelper

public StringHelper()

Method Detail

normalize

public static final String normalize(String originalString)

Process a string to apply filter as lucene and solr does : - remove accent - lowercase - word delimiter ('-', '.'

Parameters:

originalString - the string to process

Returns:

the transformed String or null if the original String is null

transformStringForPartialWordIndexation

public static final String transformStringForPartialWordIndexation(String originalString,
                                             char delimiter)

Process a string to in order to be stored in a specific postgres field to allow the index usage for ilike (ilike(%String%): e.g : 'it s ok'=> s ok, s o, it s, t s o, t s, it s ok, ok, it s o, it, t s ok it remove duplicates and don't put single character.

Parameters:

originalString - the string to process

delimiter - words will be delimited by this char (it should be the same as the one in transformStringForPartialWordSearch(String, char). For gisgraphy the char is WHITESPACE_CHAR_DELIMITER IMPORTANT NOTE : if the string is greater than MAX_STRING_INDEXABLE_LENGTH, the method will return null;

Returns:

the transformed String (or null if the original String is null) to be used by the postgres function to_ts_vector

See Also:

transformStringForPartialWordSearch(String, char)

transformStringForPartialWordSearch

public static final String transformStringForPartialWordSearch(String originalString,
                                         char delimiter)

Parameters:

originalString - the string to transform

delimiter - the delimiter (it should be the same as the one use in transformStringForPartialWordIndexation(String, char)) For gisgraphy the char is WHITESPACE_CHAR_DELIMITER

Returns:

the transformed string (or null if the original String is null) to be use by the postgres function plainto_tsquery)

See Also:

transformStringForPartialWordIndexation(String, char)

updateOpenStreetMapEntityForIndexation

public static OpenStreetMap updateOpenStreetMapEntityForIndexation(OpenStreetMap openStreetMap)

Parameters:

openStreetMap - the openStreetMap Entity to update

Returns:

the same openstreetmap entity with the OpenStreetMap.FULLTEXTSEARCH_COLUMN_NAME

splitCamelCase

public static String splitCamelCase(String s)

Parameters:

s - a camel Case string

Returns:

a human readable string where upper char is replaced by a space and the lowercase char

isNotEmptyString

public static boolean isNotEmptyString(String string)

Usefull method to be compatible with jdk1.5 (jdk 1.6 already have this method)

Parameters:

string - the string to test

Returns:

true if the string is not null or empty (trimmed)

isEmptyString

public static boolean isEmptyString(String string)

Usefull method to be compatible with jdk1.5 (jdk 1.6 already have this method)

Parameters:

string - the string to test

Returns:

true if the sting is null or empty (trimmed)

getStackTraceAsString

public static String getStackTraceAsString(Throwable aThrowable)

Parameters:

aThrowable -

Returns:

the stacktrace as string