Spring Framework

org.springframework.web.servlet.mvc.condition
Class RequestConditionHolder

java.lang.Object
  extended by org.springframework.web.servlet.mvc.condition.AbstractRequestCondition<RequestConditionHolder>
      extended by org.springframework.web.servlet.mvc.condition.RequestConditionHolder
All Implemented Interfaces:
RequestCondition<RequestConditionHolder>

public final class RequestConditionHolder
extends AbstractRequestCondition<RequestConditionHolder>

A holder for a RequestCondition useful when the type of the request condition is not known ahead of time, e.g. custom condition. Since this class is also an implementation of RequestCondition, effectively it decorates the held request condition and allows it to be combined and compared with other request conditions in a type and null safe way.

When two RequestConditionHolder instances are combined or compared with each other, it is expected the conditions they hold are of the same type. If they are not, a ClassCastException is raised.

Since:
3.1
Author:
Rossen Stoyanchev

Constructor Summary
RequestConditionHolder(RequestCondition<?> requestCondition)
          Create a new holder to wrap the given request condition.
 
Method Summary
 RequestConditionHolder combine(RequestConditionHolder other)
          Combine the request conditions held by the two RequestConditionHolder instances after making sure the conditions are of the same type.
 int compareTo(RequestConditionHolder other, javax.servlet.http.HttpServletRequest request)
          Compare the request conditions held by the two RequestConditionHolder instances after making sure the conditions are of the same type.
 RequestCondition<?> getCondition()
          Return the held request condition, or null if not holding one.
protected  java.util.Collection<?> getContent()
          Return the discrete items a request condition is composed of.
 RequestConditionHolder getMatchingCondition(javax.servlet.http.HttpServletRequest request)
          Get the matching condition for the held request condition wrap it in a new RequestConditionHolder instance.
protected  java.lang.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

RequestConditionHolder

public RequestConditionHolder(RequestCondition<?> requestCondition)
Create a new holder to wrap the given request condition.

Parameters:
requestCondition - the condition to hold, may be null
Method Detail

getCondition

public RequestCondition<?> getCondition()
Return the held request condition, or null if not holding one.


getContent

protected java.util.Collection<?> 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<RequestConditionHolder>
Returns:
a collection of objects, never null

getToStringInfix

protected java.lang.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<RequestConditionHolder>

combine

public RequestConditionHolder combine(RequestConditionHolder other)
Combine the request conditions held by the two RequestConditionHolder instances after making sure the conditions are of the same type. Or if one holder is empty, the other holder is returned.

Parameters:
other - the condition to combine with.
Returns:
a request condition instance that is the result of combining the two condition instances.

getMatchingCondition

public RequestConditionHolder getMatchingCondition(javax.servlet.http.HttpServletRequest request)
Get the matching condition for the held request condition wrap it in a new RequestConditionHolder instance. Or otherwise if this is an empty holder, return the same holder instance.

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

compareTo

public int compareTo(RequestConditionHolder other,
                     javax.servlet.http.HttpServletRequest request)
Compare the request conditions held by the two RequestConditionHolder instances after making sure the conditions are of the same type. Or if one holder is empty, the other holder is preferred.


Spring Framework