Java Server Pages

Name

TagExtraInfo

Synopsis

Class Name:	javax.servlet.jsp.tagext.TagExtraInfo
Extends:	None
Implements:	None
Implemented by:	Internal container-dependent class. Most containers use the reference implementation of the class (developed in the Apache Jakarta project).

Description

For custom actions that create scripting variables or require additional translation time validation of the tag attributes, a subclass of the TagExtraInfo class must be developed for the custom action and declared in the Tag Library Descriptor. The JSP container creates an instance of the TagExtraInfo subclass during the translation phase.

Class Summary

public abstract class TagExtraInfo {
  // Constructor
  public TagExtraInfo( );

  // Methods
  public TagInfo getTagInfo( );
  public VariableInfo[] getVariableInfo(TagData data);
  public boolean isValid(TagData data);
  public void setTagInfo(TagInfo tagInfo);
}

Constructor

public TagExtraInfo( )

Creates a new TagExtraInfo instance.

Methods

public TagInfo getTagInfo( )

Returns the TagInfo instance for the custom action associated with this TagExtraInfo instance. The TagInfo instance is set by the setTagInfo( ) method (called by the container).

public VariableInfo[] getVariableInfo(TagData data)

Returns a VariableInfo[] with information about scripting variables created by the tag handler class associated with this TagExtraInfo instance. The default implementation returns an empty array. A subclass must override this method if the corresponding tag handler creates scripting ...