com.googlecode.flyway.core.util
Class StringUtils

java.lang.Object
  com.googlecode.flyway.core.util.StringUtils

public class StringUtils
extends java.lang.Object

Various string-related utilities.

Method Summary

static java.lang.String	collapseWhitespace(java.lang.String str) Replaces all sequences of whitespace by a single blank.
static boolean	isNumeric(java.lang.String str) Checks if the String contains only unicode digits.
static java.lang.String	left(java.lang.String str, int count) Returns the first n characters from this string, where n = count.
static java.lang.String	replaceAll(java.lang.String str, java.lang.String originalToken, java.lang.String replacementToken) Replaces all occurrances of this originalToken in this string with this replacementToken.
static java.lang.String	trimOrPad(java.lang.String str, int length) Trims or pads (with spaces) this string, so it has this exact length.

Methods inherited from class java.lang.Object

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

Method Detail

trimOrPad

public static java.lang.String trimOrPad(java.lang.String str,
                                         int length)

Trims or pads (with spaces) this string, so it has this exact length.

Parameters:

str - The string to adjust. null is treated as an empty string.

length - The exact length to reach.

Returns:

The adjusted string.

isNumeric

public static boolean isNumeric(java.lang.String str)

Checks if the String contains only unicode digits. A decimal point is not a unicode digit and returns false.

null will return false. An empty String ("") will return true.

 StringUtils.isNumeric(null)   = false
 StringUtils.isNumeric("")     = true
 StringUtils.isNumeric("  ")   = false
 StringUtils.isNumeric("123")  = true
 StringUtils.isNumeric("12 3") = false
 StringUtils.isNumeric("ab2c") = false
 StringUtils.isNumeric("12-3") = false
 StringUtils.isNumeric("12.3") = false
 

Parameters:

str - the String to check, may be null

Returns:

true if only contains digits, and is non-null

collapseWhitespace

public static java.lang.String collapseWhitespace(java.lang.String str)

Replaces all sequences of whitespace by a single blank. Ex.: " " -> " "

Parameters:

str - The string to analyse.

Returns:

The input string, with all whitespace collapsed.

left

public static java.lang.String left(java.lang.String str,
                                    int count)

Returns the first n characters from this string, where n = count. If the string is shorter, the entire string will be returned. If the string is longer, it will be truncated.

Parameters:

str - The string to parse.

count - The amount of characters to return.

Returns:

The first n characters from this string, where n = count.

replaceAll

public static java.lang.String replaceAll(java.lang.String str,
                                          java.lang.String originalToken,
                                          java.lang.String replacementToken)

Replaces all occurrances of this originalToken in this string with this replacementToken.

Parameters:

str - The string to process.

originalToken - The token to replace.

replacementToken - The replacement.

Returns:

The transformed str.