Package org.smartparam.engine.util

Class EngineUtil

java.lang.Object

org.smartparam.engine.util.EngineUtil

public abstract class EngineUtil
extends Object

The class contains the helper and tool methods used by the engine.

Some methods have equivalents in the standard library or different tool libraries but implemented in a way that increases their efficiency for use in the engine.

Since:

1.0.0

Author:

Przemek Hertel

Method Summary

Modifier and Type	Method	Description
static boolean	hasText(String text)
static String[]	split(String str, char delim)	Splits the given string and returns an array of tokens.
static String[]	split(String str, char delim, int maxTokens)	Splits the given string and returns an array of tokens.
static String[]	split2(String str, char delim)	Splits a string into exactly 2 tokens.
static String	trimAllWhitespace(String str)

Methods inherited from class java.lang.Object

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

Method Details

hasText

public static boolean hasText(String text)

split

public static String[] split(String str,
 char delim,
 int maxTokens)

Splits the given string and returns an array of tokens. The separator is a single delim character. Returns a maximum of max tokens even if the input string contains more tokens.

The method is more than 4 times faster than String.split () called for a 1-character delimiter.

Parameters:

str - input string

delim - single character treated as a separator

maxTokens - maximum number of tokens, the value -1 returns an array of all tokens (unlimited)

Returns:

token array, never returns null

See Also:

• (String, char)

split

public static String[] split(String str,
 char delim)

Splits the given string and returns an array of tokens. The separator is a single delim character. Returns arrays with all tokens found in the input string.

The method is more than 4 times faster than String.split () called for a 1-character delimiter.

Parameters:

str - input string

delim - character treated as a separator

Returns:

Array of all tokens, never returns null

See Also:

• (String, char, int)

split2

public static String[] split2(String str,
 char delim)

Splits a string into exactly 2 tokens. The separator is the first occurrence of the delim character.

The method is 6 times faster than (java.lang.String, char, int) and about 24 times faster than String.split. Applicable to typical hotspots.

Parameters:

str - string that will be split into exactly 2 tokens

delim - character to be the separator

Returns:

2 element's token array, never returns null

trimAllWhitespace

public static String trimAllWhitespace(String str)