org.codehaus.groovy.grails.io.support

Class AntPathMatcher

java.lang.Object

org.codehaus.groovy.grails.io.support.AntPathMatcher

public class AntPathMatcher
extends java.lang.Object

PathMatcher implementation for Ant-style path patterns. Examples are provided below.

Part of this mapping code has been kindly borrowed from Apache Ant.

The mapping matches URLs using the following rules:

• ? matches one character
• * matches zero or more characters
• ** matches zero or more 'directories' in a path

Some examples:

• com/t?st.jsp - matches com/test.jsp but also com/tast.jsp or com/txst.jsp
• com/*.jsp - matches all .jsp files in the com directory
• com/**/test.jsp - matches all test.jsp files underneath the com path
• org/springframework/**/*.jsp - matches all .jsp files underneath the org/springframework path
• org/**/servlet/bla.jsp - matches org/springframework/servlet/bla.jsp but also org/springframework/testing/servlet/bla.jsp and org/servlet/bla.jsp

Since:

16.07.2003

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DEFAULT_PATH_SEPARATOR Default path separator: "/"

Constructor Summary

Constructors

Constructor and Description
AntPathMatcher()

Method Summary

Modifier and Type	Method and Description
java.lang.String	combine(java.lang.String pattern1, java.lang.String pattern2) Combines two patterns into a new pattern that is returned.
static int	countOccurrencesOf(java.lang.String str, java.lang.String sub) Count the occurrences of the substring in string s.
protected boolean	doMatch(java.lang.String pattern, java.lang.String path, boolean fullMatch, java.util.Map<java.lang.String,java.lang.String> uriTemplateVariables) Actually match the given path against the given pattern.
java.lang.String	extractPathWithinPattern(java.lang.String pattern, java.lang.String path) Given a pattern and a full path, determine the pattern-mapped part.
java.util.Map<java.lang.String,java.lang.String>	extractUriTemplateVariables(java.lang.String pattern, java.lang.String path)
java.util.Comparator<java.lang.String>	getPatternComparator(java.lang.String path) Given a full path, returns a Comparator suitable for sorting patterns in order of explicitness.
boolean	isPattern(java.lang.String path)
boolean	match(java.lang.String pattern, java.lang.String path)
boolean	matchStart(java.lang.String pattern, java.lang.String path)
void	setPathSeparator(java.lang.String pathSeparator) Set the path separator to use for pattern parsing.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_PATH_SEPARATOR

public static final java.lang.String DEFAULT_PATH_SEPARATOR

Default path separator: "/"

See Also:

Constant Field Values

Constructor Detail

AntPathMatcher

public AntPathMatcher()

Method Detail

setPathSeparator

public void setPathSeparator(java.lang.String pathSeparator)

Set the path separator to use for pattern parsing. Default is "/", as in Ant.

isPattern

public boolean isPattern(java.lang.String path)

match

public boolean match(java.lang.String pattern,
                     java.lang.String path)

matchStart

public boolean matchStart(java.lang.String pattern,
                          java.lang.String path)

doMatch

protected boolean doMatch(java.lang.String pattern,
                          java.lang.String path,
                          boolean fullMatch,
                          java.util.Map<java.lang.String,java.lang.String> uriTemplateVariables)

Actually match the given path against the given pattern.

Parameters:

pattern - the pattern to match against

path - the path String to test

fullMatch - whether a full pattern match is required (else a pattern match as far as the given base path goes is sufficient)

Returns:

true if the supplied path matched, false if it didn't

extractPathWithinPattern

public java.lang.String extractPathWithinPattern(java.lang.String pattern,
                                                 java.lang.String path)

Given a pattern and a full path, determine the pattern-mapped part.

For example:

• '/docs/cvs/commit.html' and '/docs/cvs/commit.html -> ''
• '/docs/*' and '/docs/cvs/commit -> 'cvs/commit'
• '/docs/cvs/*.html' and '/docs/cvs/commit.html -> 'commit.html'
• '/docs/**' and '/docs/cvs/commit -> 'cvs/commit'
• '/docs/**\/*.html' and '/docs/cvs/commit.html -> 'cvs/commit.html'
• '/*.html' and '/docs/cvs/commit.html -> 'docs/cvs/commit.html'
• '*.html' and '/docs/cvs/commit.html -> '/docs/cvs/commit.html'
• '*' and '/docs/cvs/commit.html -> '/docs/cvs/commit.html'

Assumes that match(java.lang.String, java.lang.String) returns true for 'pattern' and 'path', but does not enforce this.

extractUriTemplateVariables

public java.util.Map<java.lang.String,java.lang.String> extractUriTemplateVariables(java.lang.String pattern,
                                                                                    java.lang.String path)

combine

public java.lang.String combine(java.lang.String pattern1,
                                java.lang.String pattern2)

Combines two patterns into a new pattern that is returned.

This implementation simply concatenates the two patterns, unless the first pattern contains a file extension match (such as *.html. In that case, the second pattern should be included in the first, or an IllegalArgumentException is thrown.

For example:

Pattern 1	Pattern 2	Result
/hotels	null	/hotels
null	/hotels	/hotels
/hotels	/bookings	/hotels/bookings
/hotels	bookings	/hotels/bookings
/hotels/*	/bookings	/hotels/bookings
/hotels/**	/bookings	/hotels/**/bookings
/hotels	{hotel}	/hotels/{hotel}
/hotels/*	{hotel}	/hotels/{hotel}
/hotels/**	{hotel}	/hotels/**/{hotel}
/*.html	/hotels.html	/hotels.html
/*.html	/hotels	/hotels.html
/*.html	/*.txt	IllegalArgumentException

Parameters:

pattern1 - the first pattern

pattern2 - the second pattern

Returns:

the combination of the two patterns

Throws:

java.lang.IllegalArgumentException - when the two patterns cannot be combined

getPatternComparator

public java.util.Comparator<java.lang.String> getPatternComparator(java.lang.String path)

Given a full path, returns a Comparator suitable for sorting patterns in order of explicitness.

The returned Comparator will sort a list so that more specific patterns (without uri templates or wild cards) come before generic patterns. So given a list with the following patterns:

1. /hotels/new
2. /hotels/{hotel}
3. /hotels/*

the returned comparator will sort this list so that the order will be as indicated.

The full path given as parameter is used to test for exact matches. So when the given path is /hotels/2, the pattern /hotels/2 will be sorted before /hotels/1.

Parameters:

path - the full path to use for comparison

Returns:

a comparator capable of sorting patterns in order of explicitness

countOccurrencesOf

public static int countOccurrencesOf(java.lang.String str,
                                     java.lang.String sub)

Count the occurrences of the substring in string s.

Parameters:

str - string to search in. Return 0 if this is null.

sub - string to search for. Return 0 if this is null.