org.apache.struts2.components
Class Set

java.lang.Object
  org.apache.struts2.components.Component
      org.apache.struts2.components.Set

public class Set
extends Component

The set tag assigns a value to a variable in a specified scope. It is useful when you wish to assign a variable to a complex expression and then simply reference that variable each time rather than the complex expression. This is useful in both cases: when the complex expression takes time (performance improvement) or is hard to read (code readability improvement).

If the tag is used with body content, the evaluation of the value parameter is omitted. Instead, the String to which the body eveluates is set as value for the scoped variable.

The scopes available are as follows :-

• application - the value will be set in application scope according to servlet spec. using the name as its key
• session - the value will be set in session scope according to servlet spec. using the name as key
• request - the value will be set in request scope according to servlet spec. using the name as key
• page - the value will be set in request scope according to servlet sepc. using the name as key
• action - the value will be set in the request scope and Struts' action context using the name as key

NOTE:

If no scope is specified, it will default to action scope.

Parameters

• name* (String): The name of the new variable that is assigned the value of value
• value (Object): The value that is assigned to the variable named name
• scope (String): The scope in which to assign the variable. Can be application, session, request, page, or action. By default it is action.

Examples

 
 <s:set name="personName" value="person.name"/>
 Hello, <s:property value="#personName"/>. How are you?
 
 

Field Summary

protected String	name
protected String	scope
protected String	value

Fields inherited from class org.apache.struts2.components.Component

actionMapper, COMPONENT_STACK, id, parameters, stack

Constructor Summary

Set(ValueStack stack)

Method Summary

boolean	end(Writer writer, String body) Callback for the end tag of this component.
void	setName(String name)
void	setScope(String scope)
void	setValue(String value)

Methods inherited from class org.apache.struts2.components.Component

addAllParameters, addParameter, altSyntax, copyParams, determineActionURL, determineActionURL, determineNamespace, end, fieldError, findAncestor, findString, findString, findValue, findValue, findValue, getComponentStack, getId, getParameters, getStack, popComponentStack, setActionMapper, setId, start, toString, usesBody

Methods inherited from class java.lang.Object

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

Field Detail

name

protected String name

scope

protected String scope

value

protected String value

Constructor Detail

Set

public Set(ValueStack stack)

Method Detail

end

public boolean end(Writer writer,
                   String body)

Description copied from class: Component

Callback for the end tag of this component. Should the body be evaluated again?

NOTE: will pop component stack.

Overrides:

end in class Component

Parameters:

writer - the output writer.

body - the rendered body.

Returns:

true if the body should be evaluated again

setName

public void setName(String name)

setScope

public void setScope(String scope)

setValue

public void setValue(String value)