Package org.apache.tools.ant.util

Class StringUtils

java.lang.Object
org.apache.tools.ant.util.StringUtils
public final class StringUtils
extends java.lang.Object
A set of helper methods related to string manipulation.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    static java.lang.String LINE_SEP
    Deprecated.

  • Method Summary

    Modifier and Type Method Description
    static boolean endsWith​(java.lang.StringBuffer buffer, java.lang.String suffix)
    Checks that a string buffer ends up with a given string.
    static java.lang.String getStackTrace​(java.lang.Throwable t)
    Convenient method to retrieve the full stacktrace from a given exception.
    static java.lang.String join​(java.lang.Object[] array, java.lang.CharSequence separator)
    Joins the string representation of the elements of an array to a joined string with a given separator.
    static java.lang.String join​(java.util.Collection<?> collection, java.lang.CharSequence separator)
    Joins the string representation of the elements of a collection to a joined string with a given separator.
    static java.util.Vector<java.lang.String> lineSplit​(java.lang.String data)
    Splits up a string into a list of lines.
    static long parseHumanSizes​(java.lang.String humanSize)
    Takes a human readable size representation eg 10K a long value.
    static java.lang.String removePrefix​(java.lang.String string, java.lang.String prefix)
    Removes the prefix from a given string, if the string contains that prefix.
    static java.lang.String removeSuffix​(java.lang.String string, java.lang.String suffix)
    Removes the suffix from a given string, if the string contains that suffix.
    static java.lang.String replace​(java.lang.String data, java.lang.String from, java.lang.String to)
    Deprecated.
    Use String.replace(CharSequence, CharSequence) now.
    static java.lang.String resolveBackSlash​(java.lang.String input)
    xml does not do "c" like interpretation of strings.
    static java.util.Vector<java.lang.String> split​(java.lang.String data, int ch)
    Splits up a string where elements are separated by a specific character and return all elements.
    static java.lang.String trimToNull​(java.lang.String inputString)  

    Methods inherited from class java.lang.Object

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

  • Field Details

    • LINE_SEP

      @Deprecated public static final java.lang.String LINE_SEP
      Deprecated.
      the line separator for this OS

  • Method Details

    • lineSplit

      public static java.util.Vector<java.lang.String> lineSplit​(java.lang.String data)
      Splits up a string into a list of lines. It is equivalent to split(data, '\n').
      Parameters:
      data - the string to split up into lines.
      Returns:
      the list of lines available in the string.

    • split

      public static java.util.Vector<java.lang.String> split​(java.lang.String data, int ch)
      Splits up a string where elements are separated by a specific character and return all elements.
      Parameters:
      data - the string to split up.
      ch - the separator character.
      Returns:
      the list of elements.

    • replace

      @Deprecated public static java.lang.String replace​(java.lang.String data, java.lang.String from, java.lang.String to)
      Deprecated.
      Use String.replace(CharSequence, CharSequence) now.
      Replace occurrences into a string.
      Parameters:
      data - the string to replace occurrences into
      from - the occurrence to replace.
      to - the occurrence to be used as a replacement.
      Returns:
      the new string with replaced occurrences.

    • getStackTrace

      public static java.lang.String getStackTrace​(java.lang.Throwable t)
      Convenient method to retrieve the full stacktrace from a given exception.
      Parameters:
      t - the exception to get the stacktrace from.
      Returns:
      the stacktrace from the given exception.

    • endsWith

      public static boolean endsWith​(java.lang.StringBuffer buffer, java.lang.String suffix)
      Checks that a string buffer ends up with a given string. It may sound trivial with the existing JDK API but the various implementation among JDKs can make those methods extremely resource intensive and perform poorly due to massive memory allocation and copying. See
      Parameters:
      buffer - the buffer to perform the check on
      suffix - the suffix
      Returns:
      true if the character sequence represented by the argument is a suffix of the character sequence represented by the StringBuffer object; false otherwise. Note that the result will be true if the argument is the empty string.

    • resolveBackSlash

      public static java.lang.String resolveBackSlash​(java.lang.String input)
      xml does not do "c" like interpretation of strings. i.e. \n\r\t etc. this method processes \n, \r, \t, \f, \\ also subs \s -> " \n\r\t\f" a trailing '\' will be ignored
      Parameters:
      input - raw string with possible embedded '\'s
      Returns:
      converted string
      Since:
      Ant 1.7

    • parseHumanSizes

      public static long parseHumanSizes​(java.lang.String humanSize) throws java.lang.Exception
      Takes a human readable size representation eg 10K a long value. Doesn't support 1.1K or other rational values.
      Parameters:
      humanSize - the amount as a human readable string.
      Returns:
      a long value representation
      Throws:
      java.lang.Exception - if there is a problem.
      Since:
      Ant 1.7

    • removeSuffix

      public static java.lang.String removeSuffix​(java.lang.String string, java.lang.String suffix)
      Removes the suffix from a given string, if the string contains that suffix.
      Parameters:
      string - String for check
      suffix - Suffix to remove
      Returns:
      the string with the suffix

    • removePrefix

      public static java.lang.String removePrefix​(java.lang.String string, java.lang.String prefix)
      Removes the prefix from a given string, if the string contains that prefix.
      Parameters:
      string - String for check
      prefix - Prefix to remove
      Returns:
      the string with the prefix

    • join

      public static java.lang.String join​(java.util.Collection<?> collection, java.lang.CharSequence separator)
      Joins the string representation of the elements of a collection to a joined string with a given separator.
      Parameters:
      collection - Collection of the data to be joined (may be null)
      separator - Separator between elements (may be null)
      Returns:
      the joined string

    • join

      public static java.lang.String join​(java.lang.Object[] array, java.lang.CharSequence separator)
      Joins the string representation of the elements of an array to a joined string with a given separator.
      Parameters:
      array - Array of the data to be joined (may be null)
      separator - Separator between elements (may be null)
      Returns:
      the joined string

    • trimToNull

      public static java.lang.String trimToNull​(java.lang.String inputString)
      Parameters:
      inputString - String to trim
      Returns:
      null if the input string is null or empty or contain only empty spaces. It returns the input string without leading and trailing spaces otherwise.