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 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.

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