org.apache.hadoop.hive.metastore.utils

Class StringUtils

java.lang.Object

org.apache.hadoop.hive.metastore.utils.StringUtils

public class StringUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
StringUtils()

Method Summary

Modifier and Type	Method and Description
static Set<String>	asSet(String... elements)
static String	byteToHexString(byte[] bytes, int start, int end) Given an array of bytes it will convert the bytes to a hex string representation of the bytes.
static List<String>	intern(List<String> list) Return an interned list with identical contents as the given list.
static Map<String,String>	intern(Map<String,String> map) Return an interned map with identical contents as the given map.
static String	intern(String str) Return the internalized string, or null if the given string is null.
static boolean	isEmpty(CharSequence cs) Checks if the input string/char sequence is empty
static String	normalizeIdentifier(String identifier) Normalize all identifiers to make equality comparisons easier.
static String	stringifyException(Throwable e) Make a string representation of the exception.

Methods inherited from class java.lang.Object

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

Constructor Detail

StringUtils

public StringUtils()

Method Detail

intern

public static String intern(String str)

Return the internalized string, or null if the given string is null.

Parameters:

str - The string to intern

Returns:

The identical string cached in the string pool.

intern

public static List<String> intern(List<String> list)

Return an interned list with identical contents as the given list.

Parameters:

list - The list whose strings will be interned

Returns:

An identical list with its strings interned.

intern

public static Map<String,String> intern(Map<String,String> map)

Return an interned map with identical contents as the given map.

Parameters:

map - The map whose strings will be interned

Returns:

An identical map with its strings interned.

asSet

public static Set<String> asSet(String... elements)

normalizeIdentifier

public static String normalizeIdentifier(String identifier)

Normalize all identifiers to make equality comparisons easier.

Parameters:

identifier - identifier

Returns:

normalized version, with white space removed and all lower case.

stringifyException

public static String stringifyException(Throwable e)

Make a string representation of the exception.

Parameters:

e - The exception to stringify

Returns:

A string with exception name and call stack.

byteToHexString

public static String byteToHexString(byte[] bytes,
                                     int start,
                                     int end)

Given an array of bytes it will convert the bytes to a hex string representation of the bytes.

Parameters:

bytes - Input bytes

start - start index, inclusively

end - end index, exclusively

Returns:

hex string representation of the byte array

isEmpty

public static boolean isEmpty(CharSequence cs)

Checks if the input string/char sequence is empty

Parameters:

cs - Input char sequence

Returns:

true if empty and false if not