Java Doc for Set.java in  » Web-Framework » struts-2.0.11 » org » apache » struts2 » components » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » struts 2.0.11 » org.apache.struts2.components 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


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

Set
public class Set extends Component (Code)

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  Stringname
    
protected  Stringscope
    
protected  Stringvalue
    

Constructor Summary
public  Set(ValueStack stack)
    

Method Summary
public  booleanend(Writer writer, String body)
    
public  voidsetName(String name)
    
public  voidsetScope(String scope)
    
public  voidsetValue(String value)
    

Field Detail
name
protected String name(Code)



scope
protected String scope(Code)



value
protected String value(Code)




Constructor Detail
Set
public Set(ValueStack stack)(Code)




Method Detail
end
public boolean end(Writer writer, String body)(Code)



setName
public void setName(String name)(Code)



setScope
public void setScope(String scope)(Code)



setValue
public void setValue(String value)(Code)



Fields inherited from org.apache.struts2.components.Component
final public static String COMPONENT_STACK(Code)(Java Doc)
protected ActionMapper actionMapper(Code)(Java Doc)
protected String id(Code)(Java Doc)
protected Map parameters(Code)(Java Doc)
protected ValueStack stack(Code)(Java Doc)

Methods inherited from org.apache.struts2.components.Component
public void addAllParameters(Map params)(Code)(Java Doc)
public void addParameter(String key, Object value)(Code)(Java Doc)
public boolean altSyntax()(Code)(Java Doc)
public void copyParams(Map params)(Code)(Java Doc)
protected String determineActionURL(String action, String namespace, String method, HttpServletRequest req, HttpServletResponse res, Map parameters, String scheme, boolean includeContext, boolean encodeResult)(Code)(Java Doc)
protected String determineActionURL(String action, String namespace, String method, HttpServletRequest req, HttpServletResponse res, Map parameters, String scheme, boolean includeContext, boolean encodeResult, boolean forceAddSchemeHostAndPort, boolean escapeAmp)(Code)(Java Doc)
protected String determineNamespace(String namespace, ValueStack stack, HttpServletRequest req)(Code)(Java Doc)
public boolean end(Writer writer, String body)(Code)(Java Doc)
protected boolean end(Writer writer, String body, boolean popComponentStack)(Code)(Java Doc)
protected StrutsException fieldError(String field, String errorMsg, Exception e)(Code)(Java Doc)
protected Component findAncestor(Class clazz)(Code)(Java Doc)
protected String findString(String expr)(Code)(Java Doc)
protected String findString(String expr, String field, String errorMsg)(Code)(Java Doc)
protected Object findValue(String expr)(Code)(Java Doc)
protected Object findValue(String expr, String field, String errorMsg)(Code)(Java Doc)
protected Object findValue(String expr, Class toType)(Code)(Java Doc)
public Stack getComponentStack()(Code)(Java Doc)
public String getId()(Code)(Java Doc)
public Map getParameters()(Code)(Java Doc)
public ValueStack getStack()(Code)(Java Doc)
protected void popComponentStack()(Code)(Java Doc)
public void setActionMapper(ActionMapper mapper)(Code)(Java Doc)
public void setId(String id)(Code)(Java Doc)
public boolean start(Writer writer)(Code)(Java Doc)
protected String toString(Throwable t)(Code)(Java Doc)
public boolean usesBody()(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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