org.springframework.web.servlet.mvc.condition

Class PatternsRequestCondition

java.lang.Object

org.springframework.web.servlet.mvc.condition.AbstractRequestCondition<PatternsRequestCondition>

org.springframework.web.servlet.mvc.condition.PatternsRequestCondition

All Implemented Interfaces:

RequestCondition<PatternsRequestCondition>

public final class PatternsRequestCondition
extends AbstractRequestCondition<PatternsRequestCondition>

A logical disjunction (' || ') request condition that matches a request against a set of URL path patterns.

Since:

3.1

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
PatternsRequestCondition(String... patterns) Creates a new instance with the given URL patterns.
PatternsRequestCondition(String[] patterns, UrlPathHelper urlPathHelper, PathMatcher pathMatcher, boolean useSuffixPatternMatch, boolean useTrailingSlashMatch) Additional constructor with flags for using suffix pattern (.*) and trailing slash matches.
PatternsRequestCondition(String[] patterns, UrlPathHelper urlPathHelper, PathMatcher pathMatcher, boolean useSuffixPatternMatch, boolean useTrailingSlashMatch, List<String> fileExtensions) Creates a new instance with the given URL patterns.

Method Summary

Modifier and Type	Method and Description
PatternsRequestCondition	combine(PatternsRequestCondition other) Returns a new instance with URL patterns from the current instance ("this") and the "other" instance as follows: If there are patterns in both instances, combine the patterns in "this" with the patterns in "other" using PathMatcher.combine(String, String).
int	compareTo(PatternsRequestCondition other, HttpServletRequest request) Compare the two conditions based on the URL patterns they contain.
protected Collection<String>	getContent() Return the discrete items a request condition is composed of.
PatternsRequestCondition	getMatchingCondition(HttpServletRequest request) Checks if any of the patterns match the given request and returns an instance that is guaranteed to contain matching patterns, sorted via PathMatcher.getPatternComparator(String).
List<String>	getMatchingPatterns(String lookupPath) Find the patterns matching the given lookup path.
Set<String>	getPatterns()
protected String	getToStringInfix() The notation to use when printing discrete items of content.

Methods inherited from class org.springframework.web.servlet.mvc.condition.AbstractRequestCondition

equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PatternsRequestCondition

public PatternsRequestCondition(String... patterns)

Creates a new instance with the given URL patterns. Each pattern that is not empty and does not start with "/" is prepended with "/".

Parameters:

patterns - 0 or more URL patterns; if 0 the condition will match to every request.

PatternsRequestCondition

public PatternsRequestCondition(String[] patterns,
                                UrlPathHelper urlPathHelper,
                                PathMatcher pathMatcher,
                                boolean useSuffixPatternMatch,
                                boolean useTrailingSlashMatch)

Additional constructor with flags for using suffix pattern (.*) and trailing slash matches.

Parameters:

patterns - the URL patterns to use; if 0, the condition will match to every request.

urlPathHelper - for determining the lookup path of a request

pathMatcher - for path matching with patterns

useSuffixPatternMatch - whether to enable matching by suffix (".*")

useTrailingSlashMatch - whether to match irrespective of a trailing slash

PatternsRequestCondition

public PatternsRequestCondition(String[] patterns,
                                UrlPathHelper urlPathHelper,
                                PathMatcher pathMatcher,
                                boolean useSuffixPatternMatch,
                                boolean useTrailingSlashMatch,
                                List<String> fileExtensions)

Creates a new instance with the given URL patterns. Each pattern that is not empty and does not start with "/" is pre-pended with "/".

Parameters:

patterns - the URL patterns to use; if 0, the condition will match to every request.

urlPathHelper - a UrlPathHelper for determining the lookup path for a request

pathMatcher - a PathMatcher for pattern path matching

useSuffixPatternMatch - whether to enable matching by suffix (".*")

useTrailingSlashMatch - whether to match irrespective of a trailing slash

fileExtensions - a list of file extensions to consider for path matching

Method Detail

getPatterns

public Set<String> getPatterns()

getContent

protected Collection<String> getContent()

Description copied from class: AbstractRequestCondition

Return the discrete items a request condition is composed of. For example URL patterns, HTTP request methods, param expressions, etc.

Specified by:

getContent in class AbstractRequestCondition<PatternsRequestCondition>

Returns:

a collection of objects, never null

getToStringInfix

protected String getToStringInfix()

Description copied from class: AbstractRequestCondition

The notation to use when printing discrete items of content. For example " || " for URL patterns or " && " for param expressions.

Specified by:

getToStringInfix in class AbstractRequestCondition<PatternsRequestCondition>

combine

public PatternsRequestCondition combine(PatternsRequestCondition other)

Returns a new instance with URL patterns from the current instance ("this") and the "other" instance as follows:

• If there are patterns in both instances, combine the patterns in "this" with the patterns in "other" using PathMatcher.combine(String, String).
• If only one instance has patterns, use them.
• If neither instance has patterns, use an empty String (i.e. "").

Parameters:

other - the condition to combine with.

Returns:

a request condition instance that is the result of combining the two condition instances.

getMatchingCondition

public PatternsRequestCondition getMatchingCondition(HttpServletRequest request)

Checks if any of the patterns match the given request and returns an instance that is guaranteed to contain matching patterns, sorted via PathMatcher.getPatternComparator(String).

A matching pattern is obtained by making checks in the following order:

• Direct match
• Pattern match with ".*" appended if the pattern doesn't already contain a "."
• Pattern match
• Pattern match with "/" appended if the pattern doesn't already end in "/"

Parameters:

request - the current request

Returns:

the same instance if the condition contains no patterns; or a new condition with sorted matching patterns; or null if no patterns match.

getMatchingPatterns

public List<String> getMatchingPatterns(String lookupPath)

Find the patterns matching the given lookup path. Invoking this method should yield results equivalent to those of calling getMatchingCondition(javax.servlet.http.HttpServletRequest). This method is provided as an alternative to be used if no request is available (e.g. introspection, tooling, etc).

Parameters:

lookupPath - the lookup path to match to existing patterns

Returns:

a collection of matching patterns sorted with the closest match at the top

compareTo

public int compareTo(PatternsRequestCondition other,
                     HttpServletRequest request)

Compare the two conditions based on the URL patterns they contain. Patterns are compared one at a time, from top to bottom via PathMatcher.getPatternComparator(String). If all compared patterns match equally, but one instance has more patterns, it is considered a closer match.

It is assumed that both instances have been obtained via getMatchingCondition(HttpServletRequest) to ensure they contain only patterns that match the request and are sorted with the best matches on top.