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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » jsdk » javax.servlet.jsp.tagext 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   javax.servlet.jsp.tagext.TagExtraInfo

TagExtraInfo
abstract public class TagExtraInfo (Code)
Extra tag information for a custom tag. It performs a similar function to BeanInfo classes, but for tag libraries. The TagExtraInfo class will be called at JSP compile time to:
  1. instantiate and initialize runtime variables
  2. validate tags

The TagExtraInfo class is specified in the TLD using the teiclass attribute:

 <tag>
 <name>foo</name>
 <tagclass>com.caucho.tags.FooTag</tagclass>
 <teiclass>com.caucho.tags.FooTagInfo</teiclass>
 </tag>
 



Constructor Summary
public  TagExtraInfo()
     Implementing classes must implement a zero-arg constructor.

Method Summary
final public  TagInfogetTagInfo()
     Gets the TLD tag info for this tag.
public  VariableInfo[]getVariableInfo(TagData data)
     Returns information needed to instantiate runtime variables.
public  booleanisValid(TagData data)
     Validates the tag, so errors can be caught at compile-time instead of waiting for runtime.
final public  voidsetTagInfo(TagInfo tagInfo)
     Sets the TLD tag info for this tag.
public  ValidationMessage[]validate(TagData data)
     Validates the tag.


Constructor Detail
TagExtraInfo
public TagExtraInfo()(Code)
Implementing classes must implement a zero-arg constructor.




Method Detail
getTagInfo
final public TagInfo getTagInfo()(Code)
Gets the TLD tag info for this tag.



getVariableInfo
public VariableInfo[] getVariableInfo(TagData data)(Code)
Returns information needed to instantiate runtime variables.

The default implementation returns null.

For example, if the tag initializes a nested integer named by the foo attribute, getVariableInfo might return the following:

 public VariableInfo []getVariableInfo(TagData data)
 {
 VariableInfo []info = new VariableInfo[1];
 String foo = data.getAttribute("foo");
 info[0] = new VariableInfo(foo, "int", true, VariableInfo.NESTED);
 return info;
 }
 

Parameters:
  data - The tag's static attributes and values.



isValid
public boolean isValid(TagData data)(Code)
Validates the tag, so errors can be caught at compile-time instead of waiting for runtime.

The default implementation returns true.




setTagInfo
final public void setTagInfo(TagInfo tagInfo)(Code)
Sets the TLD tag info for this tag.



validate
public ValidationMessage[] validate(TagData data)(Code)
Validates the tag.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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