org.apache.struts2

Class ActionSupport

java.lang.Object

org.apache.struts2.ActionSupport

All Implemented Interfaces:

LocaleProvider, TextProvider, Serializable, Action, ValidationAware, Validateable

Direct Known Subclasses:

ActionSupport

public class ActionSupport
extends Object
implements Action, Validateable, ValidationAware, TextProvider, LocaleProvider, Serializable

Provides a default implementation for the most common actions. See the documentation for all the interfaces this class implements for more detailed information.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Container	container

Fields inherited from interface org.apache.struts2.action.Action

ERROR, INPUT, LOGIN, NONE, SUCCESS

Constructor Summary

Constructors

Constructor and Description
ActionSupport()

Method Summary

Modifier and Type	Method and Description
void	addActionError(String anErrorMessage) Add an Action-level error message to this Action.
void	addActionMessage(String aMessage) Add an Action-level message to this Action.
void	addFieldError(String fieldName, String errorMessage) Add an error message for a given field.
void	clearActionErrors() Clears action errors.
void	clearErrors() Clears all errors.
void	clearErrorsAndMessages() Clears all errors and messages.
void	clearFieldErrors() Clears field errors.
void	clearMessages() Clears messages.
Object	clone()
String	execute() A default implementation that does nothing an returns "success".
Collection<String>	getActionErrors() Get the Collection of Action-level error messages for this action.
Collection<String>	getActionMessages() Get the Collection of Action-level messages for this action.
protected Container	getContainer() TODO: This a temporary solution, maybe we should consider stop injecting container into beans
Map<String,List<String>>	getFieldErrors() Get the field specific errors associated with this action.
String	getFormatted(String key, String expr) Dedicated method to support I10N and conversion errors
Locale	getLocale() Gets the provided locale.
protected LocaleProvider	getLocaleProvider()
String	getText(String aTextName) Gets a message based on a message key or if no message is found the provided key is returned.
String	getText(String aTextName, List<?> args) Gets a message based on a key using the supplied args, as defined in MessageFormat or the provided key if no message is found.
String	getText(String aTextName, String defaultValue) Gets a message based on a key, or, if the message is not found, a supplied default value is returned.
String	getText(String key, String[] args) Gets a message based on a key using the supplied args, as defined in MessageFormat, or the provided key if no message is found.
String	getText(String aTextName, String defaultValue, List<?> args) Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
String	getText(String key, String defaultValue, List<?> args, ValueStack stack) Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
String	getText(String aTextName, String defaultValue, String obj) Gets a message based on a key using the supplied obj, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
String	getText(String key, String defaultValue, String[] args) Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
String	getText(String key, String defaultValue, String[] args, ValueStack stack) Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
protected TextProvider	getTextProvider() If called first time it will create TextProviderFactory, inject dependency (if Container is accesible) into in, then will create new TextProvider and store it in a field for future references and at the returns reference to that field
ResourceBundle	getTexts() Get the resource bundle associated with the implementing class (usually an action).
ResourceBundle	getTexts(String aBundleName) Get the named bundle, such as "com/acme/Foo".
boolean	hasActionErrors() Check whether there are any Action-level error messages.
boolean	hasActionMessages() Checks whether there are any Action-level messages.
boolean	hasErrors() Checks whether there are any action errors or field errors.
boolean	hasFieldErrors() Check whether there are any field errors associated with this action.
boolean	hasKey(String key) Checks if a message key exists.
String	input()
boolean	isValidLocale(Locale locale) Validates if provided Locale is value
boolean	isValidLocaleString(String localeStr) Validates if provided string is a valid Locale
void	pause(String result) Stops the action invocation immediately (by throwing a PauseException) and causes the action invocation to return the specified result, such as Action.SUCCESS, Action.INPUT, etc.
void	setActionErrors(Collection<String> errorMessages) Set the Collection of Action-level String error messages.
void	setActionMessages(Collection<String> messages) Set the Collection of Action-level String messages (not errors).
void	setContainer(Container container)
void	setFieldErrors(Map<String,List<String>> errorMap) Set the field error map of fieldname (String) to Collection of String error messages.
Locale	toLocale(String localeStr) Tries to convert provided locale string into Locale or returns null
void	validate() A default implementation that validates nothing.

Methods inherited from class java.lang.Object

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

Field Detail

container

protected Container container

Constructor Detail

ActionSupport

public ActionSupport()

Method Detail

setActionErrors

public void setActionErrors(Collection<String> errorMessages)

Description copied from interface: ValidationAware

Set the Collection of Action-level String error messages.

Specified by:

setActionErrors in interface ValidationAware

Parameters:

errorMessages - Collection of String error messages

getActionErrors

public Collection<String> getActionErrors()

Description copied from interface: ValidationAware

Get the Collection of Action-level error messages for this action. Error messages should not be added directly here, as implementations are free to return a new Collection or an Unmodifiable Collection.

Specified by:

getActionErrors in interface ValidationAware

Returns:

Collection of String error messages

setActionMessages

public void setActionMessages(Collection<String> messages)

Description copied from interface: ValidationAware

Set the Collection of Action-level String messages (not errors).

Specified by:

setActionMessages in interface ValidationAware

Parameters:

messages - Collection of String messages (not errors).

getActionMessages

public Collection<String> getActionMessages()

Description copied from interface: ValidationAware

Get the Collection of Action-level messages for this action. Messages should not be added directly here, as implementations are free to return a new Collection or an Unmodifiable Collection.

Specified by:

getActionMessages in interface ValidationAware

Returns:

Collection of String messages

setFieldErrors

public void setFieldErrors(Map<String,List<String>> errorMap)

Description copied from interface: ValidationAware

Set the field error map of fieldname (String) to Collection of String error messages.

Specified by:

setFieldErrors in interface ValidationAware

Parameters:

errorMap - field error map

getFieldErrors

public Map<String,List<String>> getFieldErrors()

Description copied from interface: ValidationAware

Get the field specific errors associated with this action. Error messages should not be added directly here, as implementations are free to return a new Collection or an Unmodifiable Collection.

Specified by:

getFieldErrors in interface ValidationAware

Returns:

Map with errors mapped from fieldname (String) to Collection of String error messages

getLocale

public Locale getLocale()

Description copied from interface: LocaleProvider

Gets the provided locale.

Specified by:

getLocale in interface LocaleProvider

Returns:

the locale.

isValidLocaleString

public boolean isValidLocaleString(String localeStr)

Description copied from interface: LocaleProvider

Validates if provided string is a valid Locale

Specified by:

isValidLocaleString in interface LocaleProvider

Parameters:

localeStr - a String representing locale, e.g. en_EN

Returns:

true if valid

isValidLocale

public boolean isValidLocale(Locale locale)

Description copied from interface: LocaleProvider

Validates if provided Locale is value

Specified by:

isValidLocale in interface LocaleProvider

Parameters:

locale - instance of Locale to validate

Returns:

true if valid

toLocale

public Locale toLocale(String localeStr)

Description copied from interface: LocaleProvider

Tries to convert provided locale string into Locale or returns null

Specified by:

toLocale in interface LocaleProvider

Parameters:

localeStr - a String representing locale, e.g.: en_EN

Returns:

instance of Locale or null

hasKey

public boolean hasKey(String key)

Description copied from interface: TextProvider

Checks if a message key exists.

Specified by:

hasKey in interface TextProvider

Parameters:

key - message key to check for

Returns:

boolean true if key exists, false otherwise.

getText

public String getText(String aTextName)

Description copied from interface: TextProvider

Gets a message based on a message key or if no message is found the provided key is returned.

Specified by:

getText in interface TextProvider

Parameters:

aTextName - the resource bundle key that is to be searched for

Returns:

the message as found in the resource bundle, or the provided key if none is found.

getText

public String getText(String aTextName,
                      String defaultValue)

Description copied from interface: TextProvider

Gets a message based on a key, or, if the message is not found, a supplied default value is returned.

Specified by:

getText in interface TextProvider

Parameters:

aTextName - the resource bundle key that is to be searched for

defaultValue - the default value which will be returned if no message is found

Returns:

the message as found in the resource bundle, or defaultValue if none is found

getText

public String getText(String aTextName,
                      String defaultValue,
                      String obj)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied obj, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.

Specified by:

getText in interface TextProvider

Parameters:

aTextName - the resource bundle key that is to be searched for

defaultValue - the default value which will be returned if no message is found

obj - obj to be used in a MessageFormat message

Returns:

the message as found in the resource bundle, or defaultValue if none is found

getText

public String getText(String aTextName,
                      List<?> args)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied args, as defined in MessageFormat or the provided key if no message is found.

Specified by:

getText in interface TextProvider

Parameters:

aTextName - the resource bundle key that is to be searched for

args - a list args to be used in a MessageFormat message

Returns:

the message as found in the resource bundle, or the provided key if none is found.

getText

public String getText(String key,
                      String[] args)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied args, as defined in MessageFormat, or the provided key if no message is found.

Specified by:

getText in interface TextProvider

Parameters:

key - the resource bundle key that is to be searched for

args - an array args to be used in a MessageFormat message

Returns:

the message as found in the resource bundle, or the provided key if none is found.

getText

public String getText(String aTextName,
                      String defaultValue,
                      List<?> args)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.

Specified by:

getText in interface TextProvider

Parameters:

aTextName - the resource bundle key that is to be searched for

defaultValue - the default value which will be returned if no message is found

args - a list args to be used in a MessageFormat message

Returns:

the message as found in the resource bundle, or defaultValue if none is found

getText

public String getText(String key,
                      String defaultValue,
                      String[] args)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.

Specified by:

getText in interface TextProvider

Parameters:

key - the resource bundle key that is to be searched for

defaultValue - the default value which will be returned if no message is found

args - an array args to be used in a MessageFormat message

Returns:

the message as found in the resource bundle, or defaultValue if none is found

getText

public String getText(String key,
                      String defaultValue,
                      List<?> args,
                      ValueStack stack)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned. Instead of using the value stack in the ActionContext this version of the getText() method uses the provided value stack.

Specified by:

getText in interface TextProvider

Parameters:

key - the resource bundle key that is to be searched for

defaultValue - the default value which will be returned if no message is found

args - a list args to be used in a MessageFormat message

stack - the value stack to use for finding the text

Returns:

the message as found in the resource bundle, or defaultValue if none is found

getText

public String getText(String key,
                      String defaultValue,
                      String[] args,
                      ValueStack stack)

Description copied from interface: TextProvider

Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned. Instead of using the value stack in the ActionContext this version of the getText() method uses the provided value stack.

Specified by:

getText in interface TextProvider

Parameters:

key - the resource bundle key that is to be searched for

defaultValue - the default value which will be returned if no message is found

args - an array args to be used in a MessageFormat message

stack - the value stack to use for finding the text

Returns:

the message as found in the resource bundle, or defaultValue if none is found

getFormatted

public String getFormatted(String key,
                           String expr)

Dedicated method to support I10N and conversion errors

Parameters:

key - message which contains formatting string

expr - that should be formatted

Returns:

formatted expr with format specified by key

getTexts

public ResourceBundle getTexts()

Description copied from interface: TextProvider

Get the resource bundle associated with the implementing class (usually an action).

Specified by:

getTexts in interface TextProvider

Returns:

the bundle

getTexts

public ResourceBundle getTexts(String aBundleName)

Description copied from interface: TextProvider

Get the named bundle, such as "com/acme/Foo".

Specified by:

getTexts in interface TextProvider

Parameters:

aBundleName - the name of the resource bundle, such as "com/acme/Foo".

Returns:

the bundle

addActionError

public void addActionError(String anErrorMessage)

Description copied from interface: ValidationAware

Add an Action-level error message to this Action.

Specified by:

addActionError in interface ValidationAware

Parameters:

anErrorMessage - the error message

addActionMessage

public void addActionMessage(String aMessage)

Description copied from interface: ValidationAware

Add an Action-level message to this Action.

Specified by:

addActionMessage in interface ValidationAware

Parameters:

aMessage - the message

addFieldError

public void addFieldError(String fieldName,
                          String errorMessage)

Description copied from interface: ValidationAware

Add an error message for a given field.

Specified by:

addFieldError in interface ValidationAware

Parameters:

fieldName - name of field

errorMessage - the error message

input

public String input()
             throws Exception

Throws:

Exception

execute

public String execute()
               throws Exception

A default implementation that does nothing an returns "success".

Subclasses should override this method to provide their business logic.

See also Action.execute().

Specified by:

execute in interface Action

Returns:

returns Action.SUCCESS

Throws:

Exception - can be thrown by subclasses.

hasActionErrors

public boolean hasActionErrors()

Description copied from interface: ValidationAware

Check whether there are any Action-level error messages.

Specified by:

hasActionErrors in interface ValidationAware

Returns:

true if any Action-level error messages have been registered

hasActionMessages

public boolean hasActionMessages()

Description copied from interface: ValidationAware

Checks whether there are any Action-level messages.

Specified by:

hasActionMessages in interface ValidationAware

Returns:

true if any Action-level messages have been registered

hasErrors

public boolean hasErrors()

Description copied from interface: ValidationAware

Checks whether there are any action errors or field errors.

Specified by:

hasErrors in interface ValidationAware

Returns:

(hasActionErrors() || hasFieldErrors())

hasFieldErrors

public boolean hasFieldErrors()

Description copied from interface: ValidationAware

Check whether there are any field errors associated with this action.

Specified by:

hasFieldErrors in interface ValidationAware

Returns:

whether there are any field errors

clearFieldErrors

public void clearFieldErrors()

Clears field errors. Useful for Continuations and other situations where you might want to clear parts of the state on the same action.

clearActionErrors

public void clearActionErrors()

Clears action errors. Useful for Continuations and other situations where you might want to clear parts of the state on the same action.

clearMessages

public void clearMessages()

Clears messages. Useful for Continuations and other situations where you might want to clear parts of the state on the same action.

clearErrors

public void clearErrors()

Clears all errors. Useful for Continuations and other situations where you might want to clear parts of the state on the same action.

clearErrorsAndMessages

public void clearErrorsAndMessages()

Clears all errors and messages. Useful for Continuations and other situations where you might want to clear parts of the state on the same action.

validate

public void validate()

A default implementation that validates nothing. Subclasses should override this method to provide validations.

Specified by:

validate in interface Validateable

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

pause

public void pause(String result)

Stops the action invocation immediately (by throwing a PauseException) and causes the action invocation to return the specified result, such as Action.SUCCESS, Action.INPUT, etc.

The next time this action is invoked (and using the same continuation ID), the method will resume immediately after where this method was called, with the entire call stack in the execute method restored.

Note: this method can only be called within the execute() method.

Parameters:

result - the result to return - the same type of return value in the execute() method.

getTextProvider

protected TextProvider getTextProvider()

If called first time it will create TextProviderFactory, inject dependency (if Container is accesible) into in, then will create new TextProvider and store it in a field for future references and at the returns reference to that field

Returns:

reference to field with TextProvider

getLocaleProvider

protected LocaleProvider getLocaleProvider()

getContainer

protected Container getContainer()

TODO: This a temporary solution, maybe we should consider stop injecting container into beans

setContainer

public void setContainer(Container container)