Package org.apache.struts.config

Class ForwardConfig

java.lang.Object

org.apache.struts.config.BaseConfig

org.apache.struts.config.ForwardConfig

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ActionForward

public class ForwardConfig
extends BaseConfig

A JavaBean representing the configuration information of a <forward> element from a Struts configuration file.

Since:

Struts 1.1

Version:

$Rev$ $Date: 2005-08-14 17:24:39 -0400 (Sun, 14 Aug 2005) $

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected String	catalog	The name of a commons-chain catalog in which command should be looked up.
protected String	command	The name of a commons-chain command which should be looked up and executed before Struts dispatches control to the view represented by this config.
protected boolean	extensionProcessed	Have the inheritance values for this class been applied?
protected String	inherit	The name of the ForwardConfig that this object should inherit properties from.
protected String	module	The prefix of the module to which this ForwardConfig entry points, which must start with a slash ("/") character.
protected String	name	The unique identifier of this forward, which is used to reference it in Action classes.
protected String	path	The URL to which this ForwardConfig entry points, which must start with a slash ("/") character.
protected boolean	redirect	Should a redirect be used to transfer control to the specified path?

Fields inherited from class org.apache.struts.config.BaseConfig

configured

Constructor Summary

Constructors

Constructor	Description
ForwardConfig()	Construct a new instance with default values.
ForwardConfig(String name, String path, boolean redirect)	Construct a new instance with the specified values.
ForwardConfig(String name, String path, boolean redirect, String module)	Construct a new instance with the specified values.
ForwardConfig(ForwardConfig copyMe)	Construct a new instance based on the values of another ForwardConfig.

Method Summary

Modifier and Type	Method	Description
protected boolean	checkCircularInheritance(ModuleConfig moduleConfig, ActionConfig actionConfig)	Traces the hierarchy of this object to check if any of the ancestors are extending this instance.
String	getCatalog()
String	getCommand()
String	getExtends()
String	getModule()
String	getName()
String	getPath()
boolean	getRedirect()
void	inheritFrom(ForwardConfig config)	Inherit values that have not been overridden from the provided config object.
boolean	isExtensionProcessed()
void	processExtends(ModuleConfig moduleConfig, ActionConfig actionConfig)	Inherit configuration information from the ForwardConfig that this instance is extending.
void	setCatalog(String catalog)
void	setCommand(String command)
void	setExtends(String inherit)
void	setModule(String module)
void	setName(String name)
void	setPath(String path)
void	setRedirect(boolean redirect)
String	toString()	Return a String representation of this object.

Methods inherited from class org.apache.struts.config.BaseConfig

copyProperties, freeze, getProperties, getProperty, inheritProperties, setProperties, setProperty, throwIfConfigured

Methods inherited from class java.lang.Object

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

Field Details

inherit

protected String inherit

The name of the ForwardConfig that this object should inherit properties from.

extensionProcessed

protected boolean extensionProcessed

Have the inheritance values for this class been applied?

name

protected String name

The unique identifier of this forward, which is used to reference it in Action classes.

path

protected String path

The URL to which this ForwardConfig entry points, which must start with a slash ("/") character. It is interpreted according to the following rules:

• If contextRelative property is true, the path is considered to be context-relative within the current web application (even if we are in a named module). It will be prefixed by the context path to create a server-relative URL.
• If the contextRelative property is false, the path is considered to be the module-relative portion of the URL. It will be used as the replacement for the $P marker in the forwardPattern property defined on the ControllerConfig element for our current module. For the default forwardPattern value of $C$M$P, the resulting server-relative URL will be the concatenation of the context path, the module prefix, and the path from this ForwardConfig.

module

protected String module

The prefix of the module to which this ForwardConfig entry points, which must start with a slash ("/") character.

Usage note: If a forward config is used in a hyperlink, and a module is specified, the path must lead to another action and not directly to a page. This is in keeping with rule that in a modular application all links must be to an action rather than a page.

redirect

protected boolean redirect

Should a redirect be used to transfer control to the specified path?

command

protected String command

The name of a commons-chain command which should be looked up and executed before Struts dispatches control to the view represented by this config.

catalog

protected String catalog

The name of a commons-chain catalog in which command should be looked up. If this value is undefined, then the command will be looked up in the "default" catalog. This value has no meaning except in the context of the command property.

Constructor Details

ForwardConfig

public ForwardConfig()

Construct a new instance with default values.

ForwardConfig

public ForwardConfig(String name,
 String path,
 boolean redirect)

Construct a new instance with the specified values.

Parameters:

name - Name of this forward

path - Path to which control should be forwarded or redirected

redirect - Should we do a redirect?

ForwardConfig

public ForwardConfig(String name,
 String path,
 boolean redirect,
 String module)

Construct a new instance with the specified values.

Parameters:

name - Name of this forward

path - Path to which control should be forwarded or redirected

redirect - Should we do a redirect?

module - Module prefix, if any

ForwardConfig

public ForwardConfig(ForwardConfig copyMe)

Construct a new instance based on the values of another ForwardConfig.

Parameters:

copyMe - A ForwardConfig instance to copy

Since:

Struts 1.3.6

Method Details

getExtends

public String getExtends()

setExtends

public void setExtends(String inherit)

isExtensionProcessed

public boolean isExtensionProcessed()

getName

public String getName()

setName

public void setName(String name)

getPath

public String getPath()

setPath

public void setPath(String path)

getModule

public String getModule()

setModule

public void setModule(String module)

getRedirect

public boolean getRedirect()

setRedirect

public void setRedirect(boolean redirect)

getCommand

public String getCommand()

setCommand

public void setCommand(String command)

getCatalog

public String getCatalog()

setCatalog

public void setCatalog(String catalog)

checkCircularInheritance

protected boolean checkCircularInheritance(ModuleConfig moduleConfig,
 ActionConfig actionConfig)

Traces the hierarchy of this object to check if any of the ancestors are extending this instance.

Parameters:

moduleConfig - The ModuleConfig that this config is from.

actionConfig - The ActionConfig that this config is from, if applicable. This parameter must be null if this forward config is a global forward.

Returns:

true if circular inheritance was detected.

inheritFrom

public void inheritFrom(ForwardConfig config)
                 throws ClassNotFoundException,
IllegalAccessException,
InstantiationException,
InvocationTargetException

Inherit values that have not been overridden from the provided config object. Subclasses overriding this method should verify that the given parameter is of a class that contains a property it is trying to inherit:

 if (config instanceof MyCustomConfig) {
     MyCustomConfig myConfig =
         (MyCustomConfig) config;

     if (getMyCustomProp() == null) {
         setMyCustomProp(myConfig.getMyCustomProp());
     }
 }
 

If the given config is extending another object, those extensions should be resolved before it's used as a parameter to this method.

Parameters:

config - The object that this instance will be inheriting its values from.

Throws:

ClassNotFoundException

IllegalAccessException

InstantiationException

InvocationTargetException

See Also:

• processExtends(ModuleConfig, ActionConfig)

processExtends

public void processExtends(ModuleConfig moduleConfig,
 ActionConfig actionConfig)
                    throws ClassNotFoundException,
IllegalAccessException,
InstantiationException,
InvocationTargetException

Inherit configuration information from the ForwardConfig that this instance is extending. This method verifies that any forward config object that it inherits from has also had its processExtends() method called.

Parameters:

moduleConfig - The ModuleConfig that this config is from.

actionConfig - The ActionConfig that this config is from, if applicable. This must be null for global forwards.

Throws:

ClassNotFoundException

IllegalAccessException

InstantiationException

InvocationTargetException

See Also:

• inheritFrom(ForwardConfig)

toString

public String toString()

Return a String representation of this object.

Overrides:

toString in class Object