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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.Push

Push
public class Push extends Component (Code)

Push value on stack for simplified usage.

  • value* (Object) - value to be pushed into the top of the stack

Examples

 
 <s:push value="user">
 <s:propery value="firstName" />
 <s:propery value="lastName" />
 </s:push>
 
 
Pushed user into the stack, and hence property tag could access user's properties (firstName, lastName etc) since user is not at the top of the stack
 
 <s:push value="myObject">                              ----- (1)
 <s:bean name="jp.SomeBean" id="myBean"/>        ----- (2)
 <s:param name="myParam" value="top"/>        ----- (3)
 </s:bean>
 </s:push>
 
 
 
 when in (1), myObject is at the top of the stack
 when in (2), jp.SomeBean is in the top of stack, also in stack's context with key myBean
 when in (3), top will get the jp.SomeBean instance
 
 
 
 <s:push value="myObject">                                       ---(A)
 <s:bean name="jp.SomeBean" id="myBean"/>                   ---(B)
 <s:param name="myParam" value="top.mySomeOtherValue"/>  ---(C)
 </s:bean>
 </s:push>
 
 
 
 when in (A), myObject is at the top of the stack
 when in (B), jp.SomeBean is at the top of the stack, also in context with key myBean
 when in (C), top refers to jp.SomeBean instance. so top.mySomeOtherValue would invoke SomeBean's mySomeOtherValue() method
 
 
 
 <s:push value="myObject">                                 ---- (i)
 <s:bean name="jp.SomeBean" id="myBean"/>             ---- (ii)
 <s:param name="myParam" value="[1].top"/>         -----(iii)
 </s:bean>
 </s:push>
 
 
 
 when in (i), myObject is at the top of the stack
 when in (ii), jp.SomeBean is at the top of the stack, followed by myObject
 when in (iii), [1].top will returned top of the cut of stack starting from myObject, namely myObject itself
 
 


Field Summary
protected  booleanpushed
    
protected  Stringvalue
    

Constructor Summary
public  Push(ValueStack stack)
    

Method Summary
public  booleanend(Writer writer, String body)
    
public  voidsetValue(String value)
    
public  booleanstart(Writer writer)
    

Field Detail
pushed
protected boolean pushed(Code)



value
protected String value(Code)




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




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



setValue
public void setValue(String value)(Code)



start
public boolean start(Writer writer)(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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