SelectorUtils (Apache Ant API)
Date: 2018-07-10

org.apache.tools.ant.types.selectors

## Class SelectorUtils

- java.lang.Object
- - org.apache.tools.ant.types.selectors.SelectorUtils

-     public final class SelectorUtils
      extends java.lang.Object

  This is a utility class used by selectors and DirectoryScanner. The functionality more properly belongs just to selectors, but unfortunately DirectoryScanner exposed these as protected methods. Thus we have to support any subclasses of DirectoryScanner that may access these methods.

  This is a Singleton.

  Since:
    1.5

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static java.lang.String` | `DEEP_TREE_MATCH` The pattern that matches an arbitrary number of directories.

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static SelectorUtils` | `getInstance()` Retrieves the instance of the Singleton.
    `static boolean` | `hasWildcards(java.lang.String input)` Tests if a string contains stars or question marks
    `static boolean` | `isOutOfDate(java.io.File src, java.io.File target, int granularity)` Returns dependency information on these two files.
    `static boolean` | `isOutOfDate(Resource src, Resource target, int granularity)` Returns dependency information on these two resources.
    `static boolean` | `isOutOfDate(Resource src, Resource target, long granularity)` Returns dependency information on these two resources.
    `static boolean` | `match(java.lang.String pattern, java.lang.String str)` Tests whether or not a string matches against a pattern.
    `static boolean` | `match(java.lang.String pattern, java.lang.String str, boolean caseSensitive)` Tests whether or not a string matches against a pattern.
    `static boolean` | `matchPath(java.lang.String pattern, java.lang.String str)` Tests whether or not a given path matches a given pattern.
    `static boolean` | `matchPath(java.lang.String pattern, java.lang.String str, boolean isCaseSensitive)` Tests whether or not a given path matches a given pattern.
    `static boolean` | `matchPatternStart(java.lang.String pattern, java.lang.String str)` Tests whether or not a given path matches the start of a given pattern up to the first "**".
    `static boolean` | `matchPatternStart(java.lang.String pattern, java.lang.String str, boolean isCaseSensitive)` Tests whether or not a given path matches the start of a given pattern up to the first "**".
    `static java.lang.String` | `removeWhitespace(java.lang.String input)` "Flattens" a string by removing all whitespace (space, tab, linefeed, carriage return, and formfeed).
    `static java.lang.String` | `rtrimWildcardTokens(java.lang.String input)` removes from a pattern all tokens to the right containing wildcards
    `static java.util.Vector<java.lang.String>` | `tokenizePath(java.lang.String path)` Breaks a path up into a Vector of path elements, tokenizing on `File.separator`.
    `static java.util.Vector<java.lang.String>` | `tokenizePath(java.lang.String path, java.lang.String separator)` Breaks a path up into a Vector of path elements, tokenizing on

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### DEEP_TREE_MATCH

          public static final java.lang.String DEEP_TREE_MATCH

      The pattern that matches an arbitrary number of directories.
      Since:
        Ant 1.8.0
      See Also:
        Constant Field Values

  - ### Method Detail

    - #### getInstance

          public static SelectorUtils getInstance()

      Retrieves the instance of the Singleton.
      Returns:
        singleton instance

    - #### matchPatternStart

          public static boolean matchPatternStart(java.lang.String pattern,
                                                  java.lang.String str)

      Tests whether or not a given path matches the start of a given pattern up to the first "**".

      This is not a general purpose test and should only be used if you can live with false positives. For example, `pattern=**\a` and `str=b` will yield `true`.

      Parameters:
        `pattern` - The pattern to match against. Must not be `null`.
        `str` - The path to match, as a String. Must not be `null`.
      Returns:
        whether or not a given path matches the start of a given pattern up to the first "**".

    - #### matchPatternStart

          public static boolean matchPatternStart(java.lang.String pattern,
                                                  java.lang.String str,
                                                  boolean isCaseSensitive)

      Tests whether or not a given path matches the start of a given pattern up to the first "**".

      This is not a general purpose test and should only be used if you can live with false positives. For example, `pattern=**\a` and `str=b` will yield `true`.

      Parameters:
        `pattern` - The pattern to match against. Must not be `null`.
        `str` - The path to match, as a String. Must not be `null`.
        `isCaseSensitive` - Whether or not matching should be performed case sensitively.
      Returns:
        whether or not a given path matches the start of a given pattern up to the first "**".

    - #### matchPath

          public static boolean matchPath(java.lang.String pattern,
                                          java.lang.String str)

      Tests whether or not a given path matches a given pattern. If you need to call this method multiple times with the same pattern you should rather use TokenizedPath
      Parameters:
        `pattern` - The pattern to match against. Must not be `null`.
        `str` - The path to match, as a String. Must not be `null`.
      Returns:
        `true` if the pattern matches against the string, or `false` otherwise.
      See Also:
        `TokenizedPath`

    - #### matchPath

          public static boolean matchPath(java.lang.String pattern,
                                          java.lang.String str,
                                          boolean isCaseSensitive)

      Tests whether or not a given path matches a given pattern. If you need to call this method multiple times with the same pattern you should rather use TokenizedPattern
      Parameters:
        `pattern` - The pattern to match against. Must not be `null`.
        `str` - The path to match, as a String. Must not be `null`.
        `isCaseSensitive` - Whether or not matching should be performed case sensitively.
      Returns:
        `true` if the pattern matches against the string, or `false` otherwise.
      See Also:
        `TokenizedPattern`

    - #### match

          public static boolean match(java.lang.String pattern,
                                      java.lang.String str)

      Tests whether or not a string matches against a pattern. The pattern may contain two special characters:
      '*' means zero or more characters
      '?' means one and only one character
      Parameters:
        `pattern` - The pattern to match against. Must not be `null`.
        `str` - The string which must be matched against the pattern. Must not be `null`.
      Returns:
        `true` if the string matches against the pattern, or `false` otherwise.

    - #### match

          public static boolean match(java.lang.String pattern,
                                      java.lang.String str,
                                      boolean caseSensitive)

      Tests whether or not a string matches against a pattern. The pattern may contain two special characters:
      '*' means zero or more characters
      '?' means one and only one character
      Parameters:
        `pattern` - The pattern to match against. Must not be `null`.
        `str` - The string which must be matched against the pattern. Must not be `null`.
        `caseSensitive` - Whether or not matching should be performed case sensitively.
      Returns:
        `true` if the string matches against the pattern, or `false` otherwise.

    - #### tokenizePath

          public static java.util.Vector<java.lang.String> tokenizePath(java.lang.String path)

      Breaks a path up into a Vector of path elements, tokenizing on `File.separator`.
      Parameters:
        `path` - Path to tokenize. Must not be `null`.
      Returns:
        a Vector of path elements from the tokenized path

    - #### tokenizePath

          public static java.util.Vector<java.lang.String> tokenizePath(java.lang.String path,
                                                                        java.lang.String separator)

      Breaks a path up into a Vector of path elements, tokenizing on
      Parameters:
        `path` - Path to tokenize. Must not be `null`.
        `separator` - the separator against which to tokenize.
      Returns:
        a Vector of path elements from the tokenized path
      Since:
        Ant 1.6

    - #### isOutOfDate

          public static boolean isOutOfDate(java.io.File src,
                                            java.io.File target,
                                            int granularity)

      Returns dependency information on these two files. If src has been modified later than target, it returns true. If target doesn't exist, it likewise returns true. Otherwise, target is newer than src and is not out of date, thus the method returns false. It also returns false if the src file doesn't even exist, since how could the target then be out of date.
      Parameters:
        `src` - the original file
        `target` - the file being compared against
        `granularity` - the amount in seconds of slack we will give in determining out of dateness
      Returns:
        whether the target is out of date

    - #### isOutOfDate

          public static boolean isOutOfDate(Resource src,
                                            Resource target,
                                            int granularity)

      Returns dependency information on these two resources. If src has been modified later than target, it returns true. If target doesn't exist, it likewise returns true. Otherwise, target is newer than src and is not out of date, thus the method returns false. It also returns false if the src file doesn't even exist, since how could the target then be out of date.
      Parameters:
        `src` - the original resource
        `target` - the resource being compared against
        `granularity` - the int amount in seconds of slack we will give in determining out of dateness
      Returns:
        whether the target is out of date

    - #### isOutOfDate

          public static boolean isOutOfDate(Resource src,
                                            Resource target,
                                            long granularity)

      Returns dependency information on these two resources. If src has been modified later than target, it returns true. If target doesn't exist, it likewise returns true. Otherwise, target is newer than src and is not out of date, thus the method returns false. It also returns false if the src file doesn't even exist, since how could the target then be out of date.
      Parameters:
        `src` - the original resource
        `target` - the resource being compared against
        `granularity` - the long amount in seconds of slack we will give in determining out of dateness
      Returns:
        whether the target is out of date

    - #### removeWhitespace

          public static java.lang.String removeWhitespace(java.lang.String input)

      "Flattens" a string by removing all whitespace (space, tab, linefeed, carriage return, and formfeed). This uses StringTokenizer and the default set of tokens as documented in the single argument constructor.
      Parameters:
        `input` - a String to remove all whitespace.
      Returns:
        a String that has had all whitespace removed.

    - #### hasWildcards

          public static boolean hasWildcards(java.lang.String input)

      Tests if a string contains stars or question marks
      Parameters:
        `input` - a String which one wants to test for containing wildcard
      Returns:
        true if the string contains at least a star or a question mark

    - #### rtrimWildcardTokens

          public static java.lang.String rtrimWildcardTokens(java.lang.String input)

      removes from a pattern all tokens to the right containing wildcards
      Parameters:
        `input` - the input string
      Returns:
        the leftmost part of the pattern without wildcards