public class TagAttributeInfo extends Object
Only the information needed to generate code is included here. Other information like SCHEMA for validation belongs elsewhere.
Note from the Expert Group:
This should have been designed as an interface. Every time we change the TLD, we need to add a new constructor to
this class (not good). This class should only be instantiated by container implementations (not by JSP developers).
Modifier and Type | Field and Description |
---|---|
static String |
ID
"id" is wired in to be ID.
|
Constructor and Description |
---|
TagAttributeInfo(String name,
boolean required,
String type,
boolean reqTime)
Constructor for TagAttributeInfo.
|
TagAttributeInfo(String name,
boolean required,
String type,
boolean reqTime,
boolean fragment)
JSP 2.0 Constructor for TagAttributeInfo.
|
TagAttributeInfo(String name,
boolean required,
String type,
boolean reqTime,
boolean fragment,
String description,
boolean deferredValue,
boolean deferredMethod,
String expectedTypeName,
String methodSignature)
JSP 2.1 Constructor for TagAttributeInfo.
|
Modifier and Type | Method and Description |
---|---|
boolean |
canBeRequestTime()
Whether this attribute has been specified in the TLD as rtexprvalue.
|
String |
getDescription()
Gets the description string of this tag attribute.
|
String |
getExpectedTypeName()
Returns the name of the expected type (as a String) of this deferred value attribute.
|
static TagAttributeInfo |
getIdAttribute(TagAttributeInfo[] a)
Convenience static method that goes through an array of TagAttributeInfo objects and looks for "id".
|
String |
getMethodSignature()
Returns the expected method signature of this deferred method attribute.
|
String |
getName()
The name of this attribute.
|
String |
getTypeName()
The type (as a String) of this attribute.
|
boolean |
isDeferredMethod()
Returns
true if this attribute is to be passed a MethodExpression so that expression
evaluation can be deferred. |
boolean |
isDeferredValue()
Returns
true if this attribute is to be passed a ValueExpression so that expression
evaluation can be deferred. |
boolean |
isFragment()
Whether this attribute is of type JspFragment.
|
boolean |
isRequired()
Whether this attribute is required.
|
String |
toString()
Returns a String representation of this TagAttributeInfo, suitable for debugging purposes.
|
public static final String ID
public TagAttributeInfo(String name, boolean required, String type, boolean reqTime)
name
- The name of the attribute.required
- If this attribute is required in tag instances.type
- The name of the type of the attribute.reqTime
- Whether this attribute holds a request-time Attribute.public TagAttributeInfo(String name, boolean required, String type, boolean reqTime, boolean fragment)
name
- The name of the attribute.required
- If this attribute is required in tag instances.type
- The name of the type of the attribute.reqTime
- Whether this attribute holds a request-time Attribute.fragment
- Whether this attribute is of type JspFragmentpublic TagAttributeInfo(String name, boolean required, String type, boolean reqTime, boolean fragment, String description, boolean deferredValue, boolean deferredMethod, String expectedTypeName, String methodSignature)
name
- The name of the attribute.required
- If this attribute is required in tag instances.type
- The name of the type of the attribute.reqTime
- Whether this attribute holds a request-time Attribute.fragment
- Whether this attribute is of type JspFragmentdescription
- The description of the attribute.deferredValue
- Whether this attribute is a deferred value.deferredMethod
- Whether this attribute is a deferred method. rtexpr or deferred value.expectedTypeName
- The name of the expected type of this deferred value (or null
if this is not
a deferred value).methodSignature
- The expected method signature of this deferred method (or null
if this is
not a deferred method).public String getName()
public String getTypeName()
This method must return "javax.el.ValueExpression"
if isDeferredValue()
returns
true
and canBeRequestTime()
returns false
. It must return
"javax.el.MethodExpression"
if isDeferredMethod()
returns true
. It must
return "java.lang.Object"
if isDeferredValue()
returns true
and
canBeRequestTime()
returns true
.
public boolean canBeRequestTime()
true
, this means the
attribute can hold a request-time value.public boolean isRequired()
public static TagAttributeInfo getIdAttribute(TagAttributeInfo[] a)
a
- An array of TagAttributeInfopublic boolean isFragment()
public String getDescription()
public boolean isDeferredValue()
true
if this attribute is to be passed a ValueExpression
so that expression
evaluation can be deferred.
If this method returns true
, then getTypeName()
must return
"javax.el.ValueExpression"
.
The getExpectedType()
method can be used to retrieve the expected type this value expression will be
constructed with.
true
if this attribute accepts a deferred value; false
otherwise.public boolean isDeferredMethod()
true
if this attribute is to be passed a MethodExpression
so that expression
evaluation can be deferred.
If this method returns true
, then getTypeName()
must return
"javax.el.MethodExpression"
.
The getMethodSignature()
method can be used to retrieve the expected method signature this method
expression will be constructed with.
true
if this attribute accepts a deferred method; false
otherwise.public String getExpectedTypeName()
This method returns null
if isDeferredValue()
returns false
.
public String getMethodSignature()
This method returns null
if isDeferredMethod()
returns false
.
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