org.springframework.util

Interface PathMatcher

All Known Implementing Classes:

AntPathMatcher

public interface PathMatcher

Strategy interface for String-based path matching.

Used by PathMatchingResourcePatternResolver, AbstractUrlHandlerMapping, and WebContentInterceptor.

The default implementation is AntPathMatcher, supporting the Ant-style pattern syntax.

Since:

1.2

Author:

Juergen Hoeller

See Also:

AntPathMatcher

Method Summary

Modifier and Type	Method and Description
String	combine(String pattern1, String pattern2) Combines two patterns into a new pattern that is returned.
String	extractPathWithinPattern(String pattern, String path) Given a pattern and a full path, determine the pattern-mapped part.
Map<String,String>	extractUriTemplateVariables(String pattern, String path) Given a pattern and a full path, extract the URI template variables.
Comparator<String>	getPatternComparator(String path) Given a full path, returns a Comparator suitable for sorting patterns in order of explicitness for that path.
boolean	isPattern(String path) Does the given path represent a pattern that can be matched by an implementation of this interface?
boolean	match(String pattern, String path) Match the given path against the given pattern, according to this PathMatcher's matching strategy.
boolean	matchStart(String pattern, String path) Match the given path against the corresponding part of the given pattern, according to this PathMatcher's matching strategy.

Method Detail

isPattern

boolean isPattern(String path)

Does the given path represent a pattern that can be matched by an implementation of this interface?

If the return value is false, then the match(java.lang.String, java.lang.String) method does not have to be used because direct equality comparisons on the static path Strings will lead to the same result.

Parameters:

path - the path to check

Returns:

true if the given path represents a pattern

match

boolean match(String pattern,
              String path)

Match the given path against the given pattern, according to this PathMatcher's matching strategy.

Parameters:

pattern - the pattern to match against

path - the path to test

Returns:

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

matchStart

boolean matchStart(String pattern,
                   String path)

Match the given path against the corresponding part of the given pattern, according to this PathMatcher's matching strategy.

Determines whether the pattern at least matches as far as the given base path goes, assuming that a full path may then match as well.

Parameters:

pattern - the pattern to match against

path - the path to test

Returns:

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

extractPathWithinPattern

String extractPathWithinPattern(String pattern,
                                String path)

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

This method is supposed to find out which part of the path is matched dynamically through an actual pattern, that is, it strips off a statically defined leading path from the given full path, returning only the actually pattern-matched part of the path.

For example: For "myroot/*.html" as pattern and "myroot/myfile.html" as full path, this method should return "myfile.html". The detailed determination rules are specified to this PathMatcher's matching strategy.

A simple implementation may return the given full path as-is in case of an actual pattern, and the empty String in case of the pattern not containing any dynamic parts (i.e. the pattern parameter being a static path that wouldn't qualify as an actual pattern). A sophisticated implementation will differentiate between the static parts and the dynamic parts of the given path pattern.

Parameters:

pattern - the path pattern

path - the full path to introspect

Returns:

the pattern-mapped part of the given path (never null)

extractUriTemplateVariables

Map<String,String> extractUriTemplateVariables(String pattern,
                                               String path)

Given a pattern and a full path, extract the URI template variables. URI template variables are expressed through curly brackets ('{' and '}').

For example: For pattern "/hotels/{hotel}" and path "/hotels/1", this method will return a map containing "hotel"->"1".

Parameters:

pattern - the path pattern, possibly containing URI templates

path - the full path to extract template variables from

Returns:

a map, containing variable names as keys; variables values as values

getPatternComparator

Comparator<String> getPatternComparator(String path)

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

The full algorithm used depends on the underlying implementation, but generally, the returned Comparator will sort a list so that more specific patterns come before generic patterns.

Parameters:

path - the full path to use for comparison

Returns:

a comparator capable of sorting patterns in order of explicitness

combine

String combine(String pattern1,
               String pattern2)

Combines two patterns into a new pattern that is returned.

The full algorithm used for combining the two pattern depends on the underlying implementation.

Parameters:

pattern1 - the first pattern

pattern2 - the second pattern

Returns:

the combination of the two patterns

Throws:

IllegalArgumentException - when the two patterns cannot be combined