|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.opensymphony.webwork.components.Component
com.opensymphony.webwork.components.Bean
public class Bean
Instantiates a class that conforms to the JavaBeans specification. This tag has a body which can contain
a number of Param
elements to set any mutator methods on that class.
If the id attribute is set on the BeanTag, it will place the instantiated bean into the stack's Context.
Examples:
<-- in freemarker form --> [ww.bean name="com.opensymphony.webwork.example.counter.SimpleCounter" id="counter"] [ww:param name="foo" value="BAR"/] The value of foo is : [ww:property value="foo"/], when inside the bean tag.
[/ww:bean] <-- in jsp form --> <ww:bean name="com.opensymphony.webwork.example.counter.SimpleCounter" id="counter"> <ww:param name="foo" value="BAR" /> The value of foot is : <ww:property value="foo"/>, when inside the bean tag <br /> </ww:bean>
This example instantiates a bean called SimpleCounter and sets the foo property (setFoo('BAR')). The SimpleCounter object is then pushed onto the Valuestack, which means that we can called its accessor methods (getFoo()) with the Property tag and get their values.
In the above example, the id has been set to a value of counter. This means that the SimpleCounter class will be placed into the stack's context. You can access the SimpleCounter class using WW's tag:
<-- jsp form --> <ww:property value="#counter" /> <-- freemarker form --> [ww:property value="#counter.foo"/]
In the property tag example, the # tells Ognl to search the context for the SimpleCounter class which has an id(key) of counter
Param
Field Summary | |
---|---|
protected Object |
bean
|
protected static org.apache.commons.logging.Log |
log
|
protected String |
name
|
Fields inherited from class com.opensymphony.webwork.components.Component |
---|
COMPONENT_STACK, id, parameters, stack |
Constructor Summary | |
---|---|
Bean(OgnlValueStack stack)
|
Method Summary | |
---|---|
void |
addParameter(String key,
Object value)
Add's the given key and value to this components own parameter. |
boolean |
end(Writer writer,
String body)
Callback for the end tag of this component. |
void |
setName(String name)
the class name of the bean to be instantiated (must respect JavaBean specification) |
boolean |
start(Writer writer)
Callback for the start tag of this component. |
Methods inherited from class com.opensymphony.webwork.components.Component |
---|
addAllParameters, altSyntax, copyParams, determineActionURL, determineNamespace, end, fieldError, findAncestor, findString, findString, findValue, findValue, findValue, getComponentStack, getId, getParameters, getStack, popComponentStack, setId, toString, usesBody |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected static org.apache.commons.logging.Log log
protected Object bean
protected String name
Constructor Detail |
---|
public Bean(OgnlValueStack stack)
Method Detail |
---|
public boolean start(Writer writer)
Component
start
in class Component
writer
- the output writer.
public boolean end(Writer writer, String body)
Component
end
in class Component
writer
- the output writer.body
- the rendered body.
public void addParameter(String key, Object value)
Component
addParameter
in class Component
key
- the key of the new parameter to add.value
- the value assoicated with the key.public void setName(String name)
|
WebWork Project Page | |||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |