javax.servlet.jsp.tagext
public abstract class TagExtraInfo extends Object
This class can be used:
It is the responsibility of the JSP translator that the initial value to be returned by calls to getTagInfo() corresponds to a TagInfo object for the tag being translated. If an explicit call to setTagInfo() is done, then the object passed will be returned in subsequent calls to getTagInfo().
The only way to affect the value returned by getTagInfo() is through a setTagInfo() call, and thus, TagExtraInfo.setTagInfo() is to be called by the JSP translator, with a TagInfo object that corresponds to the tag being translated. The call should happen before any invocation on validate() and before any invocation on getVariableInfo().
NOTE: It is a (translation time) error for a tag definition in a TLD with one or more variable subelements to have an associated TagExtraInfo implementation that returns a VariableInfo array with one or more elements from a call to getVariableInfo().
Constructor Summary | |
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TagExtraInfo()
Sole constructor. |
Method Summary | |
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TagInfo | getTagInfo()
Get the TagInfo for this class.
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VariableInfo[] | getVariableInfo(TagData data)
information on scripting variables defined by the tag associated with
this TagExtraInfo instance.
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boolean | isValid(TagData data)
Translation-time validation of the attributes.
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void | setTagInfo(TagInfo tagInfo)
Set the TagInfo for this class.
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ValidationMessage[] | validate(TagData data)
Translation-time validation of the attributes.
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Returns: the taginfo instance this instance is extending
Parameters: data The TagData instance.
Returns: An array of VariableInfo data, or null or a zero length array if no scripting variables are to be defined.
Parameters: data The TagData instance.
Returns: Whether this tag instance is valid.
See Also: TagExtraInfo
Parameters: tagInfo The TagInfo this instance is extending
JSP 2.0 and higher containers call validate() instead of isValid(). The default implementation of this method is to call isValid(). If isValid() returns false, a generic ValidationMessage[] is returned indicating isValid() returned false.
Parameters: data The TagData instance.
Returns: A null object, or zero length array if no errors, an array of ValidationMessages otherwise.
Since: 2.0