Package org.springframework.messaging.handler

Class DestinationPatternsMessageCondition

java.lang.Object

org.springframework.messaging.handler.AbstractMessageCondition<DestinationPatternsMessageCondition>

org.springframework.messaging.handler.DestinationPatternsMessageCondition

All Implemented Interfaces:

MessageCondition<DestinationPatternsMessageCondition>

public class DestinationPatternsMessageCondition
extends AbstractMessageCondition<DestinationPatternsMessageCondition>

MessageCondition to match the destination header of a Message against one or more patterns through a RouteMatcher.

Since:

4.0

Author:

Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field	Description
static final String	LOOKUP_DESTINATION_HEADER	The name of the "lookup destination" header.

Constructor Summary

Constructors

Constructor	Description
DestinationPatternsMessageCondition(String... patterns)	Constructor with patterns only.
DestinationPatternsMessageCondition(String[] patterns, PathMatcher matcher)	Constructor with patterns and a PathMatcher instance.
DestinationPatternsMessageCondition(String[] patterns, RouteMatcher routeMatcher)	Constructor with patterns and a RouteMatcher instance.

Method Summary

Modifier and Type	Method	Description
DestinationPatternsMessageCondition	combine(DestinationPatternsMessageCondition 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(DestinationPatternsMessageCondition other, Message<?> message)	Compare the two conditions based on the destination patterns they contain.
protected Collection<String>	getContent()	Return the collection of objects the message condition is composed of (for example, destination patterns), never null.
DestinationPatternsMessageCondition	getMatchingCondition(Message<?> message)	Check if any of the patterns match the given Message destination and return an instance that is guaranteed to contain matching patterns, sorted via PathMatcher.getPatternComparator(String).
Set<String>	getPatterns()
protected String	getToStringInfix()	The notation to use when printing discrete items of content.

Methods inherited from class org.springframework.messaging.handler.AbstractMessageCondition

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Field Details

LOOKUP_DESTINATION_HEADER

public static final String LOOKUP_DESTINATION_HEADER

The name of the "lookup destination" header.

See Also:

• Constant Field Values

Constructor Details

DestinationPatternsMessageCondition

public DestinationPatternsMessageCondition(String... patterns)

Constructor with patterns only. Creates and uses an instance of AntPathMatcher with default settings.

Non-empty patterns that don't start with "/" are prepended with "/".

Parameters:

patterns - the URL patterns to match to, or if 0 then always match

DestinationPatternsMessageCondition

public DestinationPatternsMessageCondition(String[] patterns,
 @Nullable
 PathMatcher matcher)

Constructor with patterns and a PathMatcher instance.

Parameters:

patterns - the URL patterns to match to, or if 0 then always match

matcher - the PathMatcher to use

DestinationPatternsMessageCondition

public DestinationPatternsMessageCondition(String[] patterns,
 RouteMatcher routeMatcher)

Constructor with patterns and a RouteMatcher instance.

Parameters:

patterns - the URL patterns to match to, or if 0 then always match

routeMatcher - the RouteMatcher to use

Since:

5.2

Method Details

getPatterns

public Set<String> getPatterns()

getContent

protected Collection<String> getContent()

Description copied from class: AbstractMessageCondition

Return the collection of objects the message condition is composed of (for example, destination patterns), never null.

Specified by:

getContent in class AbstractMessageCondition<DestinationPatternsMessageCondition>

getToStringInfix

protected String getToStringInfix()

Description copied from class: AbstractMessageCondition

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

Specified by:

getToStringInfix in class AbstractMessageCondition<DestinationPatternsMessageCondition>

combine

public DestinationPatternsMessageCondition combine(DestinationPatternsMessageCondition 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:

the resulting message condition

getMatchingCondition

@Nullable
public DestinationPatternsMessageCondition getMatchingCondition(Message<?> message)

Check if any of the patterns match the given Message destination and return an instance that is guaranteed to contain matching patterns, sorted via PathMatcher.getPatternComparator(String).

Parameters:

message - the message to match to

Returns:

the same instance if the condition contains no patterns; or a new condition with sorted matching patterns; or null either if a destination can not be extracted or there is no match

compareTo

public int compareTo(DestinationPatternsMessageCondition other,
 Message<?> message)

Compare the two conditions based on the destination 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(Message) to ensure they contain only patterns that match the request and are sorted with the best matches on top.