Package org.apache.solr.common.util

Class StrUtils

java.lang.Object

org.apache.solr.common.util.StrUtils

public class StrUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final char[]	HEX_DIGITS

Constructor Summary

Constructors

Constructor	Description
StrUtils()

Method Summary

Modifier and Type	Method	Description
static void	appendEscapedTextToBuilder(StringBuilder out, String item, char separator)	writes chars from item to out, backslash escaping as needed based on separator -- but does not append the separator itself
static boolean	equalsIgnoreCase(String left, String right)
static String	escapeTextWithSeparator(String item, char separator)	Creates a new copy of the string with the separator backslash escaped.
static String	formatString(String pattern, Object... args)	Format using MessageFormat but with the ROOT locale
static boolean	isBlank(String string)
static boolean	isNotBlank(String string)
static boolean	isNotNullOrEmpty(String string)
static boolean	isNullOrEmpty(String string)
static String	join(Collection<?> items, char separator)	Creates a backslash escaped string, joining all the items.
static boolean	parseBool(String s)	how to transform a String into a boolean...
static boolean	parseBool(String s, boolean def)	NullPointerException and SolrException free version of parseBool(String)
static boolean	parseBoolean(CharSequence s)	Return if a string starts with '1', 't', or 'T' and return false otherwise.
static void	partialURLEncodeVal(StringBuilder dest, String val)	URLEncodes a value, replacing only enough chars so that the URL may be unambiguously pasted back into a browser.
static List<String>	split(String s, char sep)
static List<String>	splitFileNames(String fileNames)	Splits file names separated by comma character.
static List<String>	splitSmart(String s, char separator)
static List<String>	splitSmart(String s, char separator, boolean trimEmpty)
static void	splitSmart(String s, char separator, List<String> lst)	Split a string based on a separator, but don't split if it's inside a string.
static List<String>	splitSmart(String s, String separator, boolean decode)	Splits a backslash escaped string on the separator.
static List<String>	splitWS(String s, boolean decode)
static String	stringFromReader(Reader inReader)
static List<String>	toLower(List<String> strings)

Methods inherited from class java.lang.Object

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

Field Details

HEX_DIGITS

public static final char[] HEX_DIGITS

Constructor Details

StrUtils

public StrUtils()

Method Details

splitSmart

public static List<String> splitSmart(String s,
 char separator)

split

public static List<String> split(String s,
 char sep)

splitSmart

public static List<String> splitSmart(String s,
 char separator,
 boolean trimEmpty)

splitSmart

public static void splitSmart(String s,
 char separator,
 List<String> lst)

Split a string based on a separator, but don't split if it's inside a string. Assume '\' escapes the next char both inside and outside strings.

splitSmart

public static List<String> splitSmart(String s,
 String separator,
 boolean decode)

Splits a backslash escaped string on the separator.

Current backslash escaping supported:
\n \t \r \b \f are escaped the same as a Java String
Other characters following a backslash are produced verbatim (\c => c)

Parameters:

s - the string to split

separator - the separator to split on

decode - decode backslash escaping

Returns:

not null

splitFileNames

public static List<String> splitFileNames(String fileNames)

Splits file names separated by comma character. File names can contain comma characters escaped by backslash '\'

Parameters:

fileNames - the string containing file names

Returns:

a list of file names with the escaping backslashes removed

join

public static String join(Collection<?> items,
 char separator)

Creates a backslash escaped string, joining all the items.

See Also:

• escapeTextWithSeparator(java.lang.String, char)

splitWS

public static List<String> splitWS(String s,
 boolean decode)

toLower

public static List<String> toLower(List<String> strings)

parseBoolean

public static boolean parseBoolean(CharSequence s)

Return if a string starts with '1', 't', or 'T' and return false otherwise.

parseBool

public static boolean parseBool(String s)

how to transform a String into a boolean... more flexible than Boolean.parseBoolean() to enable easier integration with html forms.

parseBool

public static boolean parseBool(String s,
 boolean def)

NullPointerException and SolrException free version of parseBool(String)

Returns:

parsed boolean value (or def, if s is null or invalid)

partialURLEncodeVal

public static void partialURLEncodeVal(StringBuilder dest,
 String val)

URLEncodes a value, replacing only enough chars so that the URL may be unambiguously pasted back into a browser.

Characters with a numeric value less than 32 are encoded. &,=,%,+,space are encoded.

escapeTextWithSeparator

public static String escapeTextWithSeparator(String item,
 char separator)

Creates a new copy of the string with the separator backslash escaped.

See Also:

• join(java.util.Collection<?>, char)

appendEscapedTextToBuilder

public static void appendEscapedTextToBuilder(StringBuilder out,
 String item,
 char separator)

writes chars from item to out, backslash escaping as needed based on separator -- but does not append the separator itself

formatString

public static String formatString(String pattern,
 Object... args)

Format using MessageFormat but with the ROOT locale

isNullOrEmpty

public static boolean isNullOrEmpty(String string)

isNotNullOrEmpty

public static boolean isNotNullOrEmpty(String string)

isBlank

public static boolean isBlank(String string)

isNotBlank

public static boolean isNotBlank(String string)

stringFromReader

public static String stringFromReader(Reader inReader)
                               throws IOException

Throws:

IOException

equalsIgnoreCase

public static boolean equalsIgnoreCase(String left,
 String right)