CallMethod Class
- public class CallMethod
extends AbstractCallMethod
An abstract base class for tags that are capable of reflectively
invoking methods. Specializations of this tag provide method
implementations that locate the object on which to invoke the
method and that handle any return value from the invoked
method.
The CallMethod
tag can have child tags of type
MethodParameter
; these tags must be in the same
order as the parameter list in the method signature of the
method that will be invoked. To invoke an overloaded method, the
property must be set to the String
name of the type to pass to the method. If the type attribute values
on nested MethodParameter
tags do not match any method signature,
an error will be reported in the page.
Attribute Descriptions |
Attribute | Required | Runtime Expression Evaluation | Data Bindable |
failOnError | No | No | No |
A boolean that if true will cause the tag to report any method
invocation errors in-line in the rendered page. |
method | No | No | No |
The method to invoke on an object. |
object | No | No | Yes |
References an object on which the method will be invoked. |
resultId | No | No | No |
The PageContext attribute name where the result,
if non-null, is stored. |
Related Topics
<netui-databinding:callMethod> Tag Sample
MethodParameter
CallControl
CallPageFlow
-
Hierarchy
-
Object
TagSupport
BodyTagSupport
AbstractBaseTag
AbstractCallMethod
CallMethod
-
All Implemented Interfaces
-
BodyTag
, IterationTag
, Serializable
, Tag
-
Direct Known Subclasses
-
CallPageFlow
, ChoiceMethod
Fields from com.bea.wlw.netui.tags.AbstractBaseTag |
ATTR_GENERAL , ATTR_GENERAL_EXPRESSION , ATTR_JAVASCRIPT , ATTR_STYLE , CLASS , ID , JAVASCRIPT_STATUS , NAME , NETUI_UNIQUE_CNT , ONCLICK , ONDBLCLICK , ONKEYDOWN , ONKEYPRESS , ONKEYUP , ONMOUSEDOWN , ONMOUSEMOVE , ONMOUSEOUT , ONMOUSEOVER , ONMOUSEUP , STYLE , TABINDEX
|
protected final Method |
-
findMethod (Object target, String methodName, boolean verifyTypes)
- The default findMethod implementation is an uncached search of all
of the methods available on the Class of the
target
|
public String |
-
getObject ()
- Get the object on which a method will be invoked.
|
protected String |
-
getObjectName ()
- Get the name of the object that is the target of the invocation.
|
public String |
-
getTagName ()
- Get the name of this tag.
|
protected void |
-
localRelease ()
- Reset all of the fields of this tag.
|
protected Object |
-
resolveObject ()
Resolve the object on which the method should be invoked.
|
public void |
-
setObject (String object)
- Set the object on which to invoke a method.
|
Methods from com.bea.wlw.netui.tags.databinding.invoke.AbstractCallMethod |
addParameter , doEndTag , doStartTag , getFailOnError , getMethod , getParameterNodes , getResultId , handleReturnValue , setFailOnError , setMethod , setResultId
|
Methods from com.bea.wlw.netui.tags.AbstractBaseTag |
addTagIdMapping , evaluateAttributeToString , filter , filter , getJavaScriptUtils , getNearestForm , getScriptReporter , getUserLocale , localRelease , registerTagError , release , renderAttribute , rewriteName , write
|
Methods from javax.servlet.jsp.tagext.TagSupport |
doAfterBody, doEndTag, doStartTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue |
Methods from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CallMethod
public CallMethod()
findMethod(Object, String, boolean) Method
protected final Method
findMethod(Object
target,
String
methodName,
boolean verifyTypes)
Description copied from AbstractCallMethod.findMethod(Object, String, boolean)
The default findMethod implementation is an uncached search of all
of the methods available on the Class of the target
-
Overrides
-
AbstractCallMethod.findMethod(Object, String, boolean)
Parameters
-
target
- the object from which to find the method
-
methodName
- the name of the method to find
-
verifyTypes
- a boolean that if true will match the type names in addition to the String method name
Returns
- a Method object matching the methodName and types, if
verifyTypes
is true.
null
otherwise.
getObject() Method
public String
getObject()
Get the object on which a method will be invoked.
getObjectName() Method
protected String
getObjectName()
Description copied from AbstractCallMethod.getObjectName()
Get the name of the object that is the target of the invocation. This is
a generic method for this tag that enables more specific error reporting.
-
Overrides
-
AbstractCallMethod.getObjectName()
Returns
- a name for the object on which the method will be invoked.
getTagName() Method
public String
getTagName()
Get the name of this tag. This is used to identify the type of this tag
for reporting tag errors.
-
Overrides
-
AbstractBaseTag.getTagName()
Returns
- a constant String representing the name of this tag.
localRelease() Method
protected void localRelease()
Reset all of the fields of this tag.
-
Overrides
-
AbstractCallMethod.localRelease()
resolveObject() Method
protected Object
resolveObject()
throws ObjectNotFoundException
Description copied from AbstractCallMethod.resolveObject()
Resolve the object on which the method should be invoked. If there are
errors resolving this object, this method will throw an ObjectNotFoundException
.
If the object is not found but no exception occurred, this method should return null.
-
Overrides
-
AbstractCallMethod.resolveObject()
Returns
- the object on which to reflectively invoke the method.
Exceptions
-
ObjectNotFoundException
setObject(String) Method
public void setObject(String
object)
Set the object on which to invoke a method.
Parameters
-
object
- the object on which to invoke a method