Package org.apache.hadoop.hbase.util

Class Strings

java.lang.Object

org.apache.hadoop.hbase.util.Strings

@Private
public final class Strings
extends Object

Utility for Strings.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DEFAULT_KEYVALUE_SEPARATOR
static final String	DEFAULT_SEPARATOR
static final org.apache.hbase.thirdparty.com.google.common.base.Joiner	JOINER
static final org.apache.hbase.thirdparty.com.google.common.base.Splitter	SPLITTER

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Strings()

Method Summary

Modifier and Type	Method	Description
static StringBuilder	appendKeyValue(StringBuilder sb, String key, Object value)	Append to a StringBuilder a key/value.
static StringBuilder	appendKeyValue(StringBuilder sb, String key, Object value, String separator, String keyValueSeparator)	Append to a StringBuilder a key/value.
static void	applyURIQueriesToConf(URI uri, org.apache.hadoop.conf.Configuration conf)	Apply the key value pairs in the query string of the given URI to the given Configuration.
static String	domainNamePointerToHostName(String dnPtr)	Given a PTR string generated via reverse DNS lookup, return everything except the trailing period.
static String	padFront(String input, char padding, int length)	Push the input string to the right by appending a character before it, usually a space.
static Map<String,String>	parseURIQueries(URI uri)	Parse the query string of an URI to a key value map.

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_SEPARATOR

public static final String DEFAULT_SEPARATOR

See Also:

• Constant Field Values

DEFAULT_KEYVALUE_SEPARATOR

public static final String DEFAULT_KEYVALUE_SEPARATOR

See Also:

• Constant Field Values

JOINER

public static final org.apache.hbase.thirdparty.com.google.common.base.Joiner JOINER

SPLITTER

public static final org.apache.hbase.thirdparty.com.google.common.base.Splitter SPLITTER

Constructor Details

Strings

private Strings()

Method Details

appendKeyValue

public static StringBuilder appendKeyValue(StringBuilder sb,
 String key,
 Object value)

Append to a StringBuilder a key/value. Uses default separators.

Parameters:

sb - StringBuilder to use

key - Key to append.

value - Value to append.

Returns:

Passed sb populated with key/value.

appendKeyValue

public static StringBuilder appendKeyValue(StringBuilder sb,
 String key,
 Object value,
 String separator,
 String keyValueSeparator)

Append to a StringBuilder a key/value. Uses default separators.

Parameters:

sb - StringBuilder to use

key - Key to append.

value - Value to append.

separator - Value to use between key and value.

keyValueSeparator - Value to use between key/value sets.

Returns:

Passed sb populated with key/value.

domainNamePointerToHostName

public static String domainNamePointerToHostName(String dnPtr)

Given a PTR string generated via reverse DNS lookup, return everything except the trailing period. Example for host.example.com., return host.example.com

Parameters:

dnPtr - a domain name pointer (PTR) string.

Returns:

Sanitized hostname with last period stripped off.

padFront

public static String padFront(String input,
 char padding,
 int length)

Push the input string to the right by appending a character before it, usually a space.

Parameters:

input - the string to pad

padding - the character to repeat to the left of the input string

length - the desired total length including the padding

Returns:

padding characters + input

parseURIQueries

public static Map<String,String> parseURIQueries(URI uri)

Parse the query string of an URI to a key value map. If a single key occurred multiple times, only the first one will take effect.

applyURIQueriesToConf

public static void applyURIQueriesToConf(URI uri,
 org.apache.hadoop.conf.Configuration conf)

Apply the key value pairs in the query string of the given URI to the given Configuration. If a single key occurred multiple times, only the first one will take effect.