org.springframework.web.servlet.mvc.condition

Class HeadersRequestCondition

java.lang.Object

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

org.springframework.web.servlet.mvc.condition.HeadersRequestCondition

All Implemented Interfaces:

RequestCondition<HeadersRequestCondition>

public final class HeadersRequestCondition
extends AbstractRequestCondition<HeadersRequestCondition>

A logical conjunction (' && ') request condition that matches a request against a set of header expressions with syntax defined in RequestMapping.headers().

Expressions passed to the constructor with header names 'Accept' or 'Content-Type' are ignored. See ConsumesRequestCondition and ProducesRequestCondition for those.

Since:

3.1

Author:

Arjen Poutsma, Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
HeadersRequestCondition(String... headers) Create a new instance from the given header expressions.

Method Summary

Modifier and Type	Method and Description
HeadersRequestCondition	combine(HeadersRequestCondition other) Returns a new instance with the union of the header expressions from "this" and the "other" instance.
int	compareTo(HeadersRequestCondition other, HttpServletRequest request) Returns: 0 if the two conditions have the same number of header expressions Less than 0 if "this" instance has more header expressions Greater than 0 if the "other" instance has more header expressions
protected Collection<org.springframework.web.servlet.mvc.condition.HeadersRequestCondition.HeaderExpression>	getContent() Return the discrete items a request condition is composed of.
Set<NameValueExpression<String>>	getExpressions() Return the contained request header expressions.
HeadersRequestCondition	getMatchingCondition(HttpServletRequest request) Returns "this" instance if the request matches all expressions; or null otherwise.
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, isEmpty, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

HeadersRequestCondition

public HeadersRequestCondition(String... headers)

Create a new instance from the given header expressions. Expressions with header names 'Accept' or 'Content-Type' are ignored. See ConsumesRequestCondition and ProducesRequestCondition for those.

Parameters:

headers - media type expressions with syntax defined in RequestMapping.headers(); if 0, the condition will match to every request

Method Detail

getExpressions

public Set<NameValueExpression<String>> getExpressions()

Return the contained request header expressions.

getContent

protected Collection<org.springframework.web.servlet.mvc.condition.HeadersRequestCondition.HeaderExpression> 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<HeadersRequestCondition>

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<HeadersRequestCondition>

combine

public HeadersRequestCondition combine(HeadersRequestCondition other)

Returns a new instance with the union of the header expressions from "this" and the "other" instance.

Parameters:

other - the condition to combine with.

Returns:

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

getMatchingCondition

public HeadersRequestCondition getMatchingCondition(HttpServletRequest request)

Returns "this" instance if the request matches all expressions; or null otherwise.

Returns:

a condition instance in case of a match; or null if there is no match

compareTo

public int compareTo(HeadersRequestCondition other,
                     HttpServletRequest request)

Returns:

• 0 if the two conditions have the same number of header expressions
• Less than 0 if "this" instance has more header expressions
• Greater than 0 if the "other" instance has more header expressions

It is assumed that both instances have been obtained via getMatchingCondition(HttpServletRequest) and each instance contains the matching header expression only or is otherwise empty.