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ObjectTagSupport
BodyTagSupport
AbstractClassicTag
MethodParameter
public class MethodParameter
A tag that is used to add an argument to a method that will be called on some object. This tag can be nested within tags that extend the AbstractCallMethod class. Those tags are:
The MethodParameter
tags are used to parameterize the method that the AbstractCallMethod
class
will call; each methodParameter
tag represents a single parameter. These tags are evaluated
in order and the parameters they describe are passed in order.
Overloaded methods on an object can be invoked by setting the type
attribute on each
methodParameter
tag that is embedded in a method invocation tag. The type name must
exactly match the primitive type name or the fully qualified class name of the argument. The
methodParameter
tags must also be in the order that they will be passed to this method.
The value of the type attribute must be an exact match of the type if it were printed after having been
accessed through Java reflection.
In order to pass null
as an argument to a method, the null attribute must be set on this tag.
Either the null attribute or the value attribute must be set on this tag.
This example shows how to pass parameters to the method call foo(int integer, String string)
.
<netui-data:methodParamter value="42"/> <netui-data:methodParamter null="true"/>This will correspond to the method call:
foo(42, null);The following sample shows how to pass parameters to the method call
foo(int integer, String string)
where the class has both of the methods foo(int integer, String string)
and
foo(Integer integer, String string)
.
<netui-data:methodParamter type="int" value="42"/> <netui-data:methodParamter type="java.lang.String" null="true"/>This will correspond to the method call:
foo(42, null);
This example shows how to pass parameters to the method call foo(int integer, String string)
.
<netui-data:methodParamter value="42"/> <netui-data:methodParamter null="true"/>This will correspond to the method call:
foo(42, null);The following sample shows how to pass parameters to the method call
foo(int integer, String string)
where the class has both of the methods foo(int integer, String string)
and
foo(Integer integer, String string)
.
<netui-data:methodParamter type="int" value="42"/> <netui-data:methodParamter type="java.lang.String" null="true"/>This will correspond to the method call:
foo(42, null);
Field Summary | |
---|---|
static Integer |
NULL_ARG
An identifier denoting that the value of this method parameter should be treated as 'null'. |
Fields inherited from class AbstractClassicTag |
---|
DefaultNamingChain, EMPTY_STRING, NETUI_UNIQUE_CNT |
Fields inherited from class BodyTagSupport |
---|
bodyContent |
Fields inherited from class TagSupport |
---|
id, pageContext |
Fields inherited from interface BodyTag |
---|
EVAL_BODY_BUFFERED, EVAL_BODY_TAG |
Fields inherited from interface IterationTag |
---|
EVAL_BODY_AGAIN |
Fields inherited from interface Tag |
---|
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE |
Constructor Summary | |
---|---|
MethodParameter()
|
Method Summary | |
---|---|
int |
doEndTag()
Prepare the value to pass up to the AbstractCallMethod type
parent. |
int |
doStartTag()
Start this tag's lifecycle. |
String |
getTagName()
Get the name of this tag. |
protected void |
localRelease()
Reset all of the fields of this tag. |
void |
setNull(boolean isNull)
Sets a boolean that describes that the parameter that should be passed to the method is null. |
void |
setType(String type)
Set a String matching the type of this parameter on the method to invoke. |
void |
setValue(Object value)
Sets the value of the method parameter that will be passed to the method call. |
Methods inherited from class BodyTagSupport |
---|
doAfterBody, doInitBody, getBodyContent, getPreviousOut, release, setBodyContent |
Methods inherited from class TagSupport |
---|
findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue |
Methods inherited from class Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface Tag |
---|
getParent, setPageContext, setParent |
Field Detail |
---|
public static final Integer NULL_ARG
Constructor Detail |
---|
public MethodParameter()
Method Detail |
---|
public String getTagName()
getTagName
in interface INetuiTag
getTagName
in class AbstractClassicTag
public void setType(String type)
Method Signature | Argument Name | Type value |
addToPrice(int price) | price | int |
addToPrice(Integer price) | price | java.lang.Integer |
type
- the type namepublic void setValue(Object value)
AbstractCallMethod.doEndTag()
will attempt to convert
the String to type that matches the position of the MethodParameter
tag in the list of MethodParameter tags nested inside of an AbstractCallMethod
tag.
value
- a String value which may be an expressionpublic void setNull(boolean isNull)
isNull
- a value that describes whether or not this tag should pass null; if
true
null will be passed; otherwise the value from the value attribute
will be passed.public int doStartTag() throws JspException
AbstractCallMethod
tag and that one of the "null" and "value"
attributes are set.
doStartTag
in interface Tag
doStartTag
in class BodyTagSupport
Tag.SKIP_BODY
JspException
- if an error occurs getting the parameterpublic int doEndTag() throws JspException
AbstractCallMethod
type
parent.
doEndTag
in interface Tag
doEndTag
in class BodyTagSupport
Tag.EVAL_PAGE
to continue evaluating the page
JspException
protected void localRelease()
localRelease
in class AbstractClassicTag
|
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