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org.apache.cocoon.acting
Class RequestParamAction

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.acting.AbstractAction
          org.apache.cocoon.acting.ServiceableAction
              org.apache.cocoon.acting.RequestParamAction

All Implemented Interfaces:

Component, LogEnabled, Serviceable, ThreadSafe, Action

public class RequestParamAction
extends ServiceableAction
implements ThreadSafe

This action makes some request details available to the sitemap via parameter substitution. {context} - is the context path of the servlet (usually "/cocoon") {requestURI} - is the requested URI without parameters {requestQuery} - is the query string like "?param1=test" if there is one Additionlly all request parameters can be made available for use in the sitemap. if the parameter "parameters" is set to true. (A variable is created for each request parameter (only if it doesn't exist) with the same name as the parameter itself) Default values can be set for request parameters, by including sitemap parameters named "default.". Sitemap definition:

 <map:action name="request" src="org.apache.cocoon.acting.RequestParamAction"/>
 

Example use:

 <map:match pattern="some-resource">
  <map:act type="request">
     <map:parameter name="parameters" value="true"/>
     <map:parameter name="default.dest" value="invalid-destination.html"/>
     <map:redirect-to uri="{context}/somewhereelse/{dest}"/>
  </map:act>
 </map:match>
 

Redirection is only one example, another use:

 <map:match pattern="some-resource">
  <map:act type="request">
     <map:parameter name="parameters" value="true"/>
     <map:generate src="users/menu-{id}.xml"/>
  </map:act>
  <map:transform src="menus/personalisation.xsl"/>
  <map:serialize/>
 </map:match>
 

etc, etc.

Version:

CVS $Id: RequestParamAction.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Marcus Crafter, Torsten Curdt

Field Summary

static String	MAP_CONTEXTPATH
static String	MAP_QUERY
static String	MAP_URI
static String	PARAM_DEFAULT_PREFIX
static String	PARAM_PARAMETERS

Fields inherited from class org.apache.cocoon.acting.ServiceableAction

manager

Fields inherited from class org.apache.cocoon.acting.AbstractAction

EMPTY_MAP

Fields inherited from interface org.apache.cocoon.acting.Action

ROLE

Constructor Summary

RequestParamAction()

Method Summary

Map	act(Redirector redirector, SourceResolver resolver, Map objectModel, String source, Parameters param) Controls the processing against some values of the Dictionary objectModel and returns a Map object with values used in subsequent sitemap substitution patterns.

Methods inherited from class org.apache.cocoon.acting.ServiceableAction

service

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAP_URI

public static final String MAP_URI

See Also:

Constant Field Values

MAP_QUERY

public static final String MAP_QUERY

See Also:

Constant Field Values

MAP_CONTEXTPATH

public static final String MAP_CONTEXTPATH

See Also:

Constant Field Values

PARAM_PARAMETERS

public static final String PARAM_PARAMETERS

See Also:

Constant Field Values

PARAM_DEFAULT_PREFIX

public static final String PARAM_DEFAULT_PREFIX

See Also:

Constant Field Values

Constructor Detail

RequestParamAction

public RequestParamAction()

Method Detail

act

public Map act(Redirector redirector,
               SourceResolver resolver,
               Map objectModel,
               String source,
               Parameters param)
        throws Exception

Description copied from interface: Action

Controls the processing against some values of the Dictionary objectModel and returns a Map object with values used in subsequent sitemap substitution patterns. NOTE: This interface is designed so that implentations can be ThreadSafe. When an action is ThreadSafe, only one instance serves all requests : this reduces memory usage and avoids pooling.

Specified by:

act in interface Action

resolver - The SourceResolver in charge

objectModel - The Map with object of the calling environment which can be used to select values this controller may need (ie Request, Response).

source - A source String to the Action

param - The Parameters for this invocation

Returns:

Map The returned Map object with sitemap substitution values which can be used in subsequent elements attributes like src= using a xpath like expression: src="mydir/{myval}/foo" If the return value is null the processing inside the element of the sitemap will be skipped.

Throws:

Exception - Indicates something is totally wrong