net.ontopia.topicmaps.nav2.taglibs.tolog
Class IfTag

java.lang.Object
  extended by javax.servlet.jsp.tagext.TagSupport
      extended by javax.servlet.jsp.tagext.BodyTagSupport
          extended by net.ontopia.topicmaps.nav2.taglibs.tolog.QueryExecutingTag
              extended by net.ontopia.topicmaps.nav2.taglibs.tolog.IfTag
All Implemented Interfaces:
Serializable, javax.servlet.jsp.tagext.BodyTag, javax.servlet.jsp.tagext.IterationTag, javax.servlet.jsp.tagext.JspTag, javax.servlet.jsp.tagext.Tag
Direct Known Subclasses:
WhenTag

public class IfTag
extends QueryExecutingTag

INTERNAL: Tolog Tag for testing if a variable is bound and non-null or if a query gives a non-empty result. If the variable is bound and non-null, then the body is evaluated once. If the query-result is non-empty, binds the query variables to the first row and evaluates the body once.

See Also:
Serialized Form

Field Summary
protected  String var
           
 
Fields inherited from class net.ontopia.topicmaps.nav2.taglibs.tolog.QueryExecutingTag
columnNames, contextManager, query, queryResult
 
Fields inherited from class javax.servlet.jsp.tagext.BodyTagSupport
bodyContent
 
Fields inherited from class javax.servlet.jsp.tagext.TagSupport
id, pageContext
 
Fields inherited from interface javax.servlet.jsp.tagext.BodyTag
EVAL_BODY_BUFFERED, EVAL_BODY_TAG
 
Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
EVAL_BODY_AGAIN
 
Fields inherited from interface javax.servlet.jsp.tagext.Tag
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE
 
Constructor Summary
IfTag()
          Default constructor.
 
Method Summary
 int doEndTag()
          Process the end tag.
 int doStartTag()
          Process the start tag for this instance.
 void release()
          Resets the state of the Tag.
 void setVar(String var)
           
 
Methods inherited from class net.ontopia.topicmaps.nav2.taglibs.tolog.QueryExecutingTag
bindVariables, doAfterBody, getQuery, getQueryResult, setQuery
 
Methods inherited from class javax.servlet.jsp.tagext.BodyTagSupport
doInitBody, getBodyContent, getPreviousOut, setBodyContent
 
Methods inherited from class javax.servlet.jsp.tagext.TagSupport
findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface javax.servlet.jsp.tagext.Tag
getParent, setPageContext, setParent
 

Field Detail

var

protected String var
Constructor Detail

IfTag

public IfTag()
Default constructor.

Method Detail

doStartTag

public int doStartTag()
               throws javax.servlet.jsp.JspTagException
Process the start tag for this instance.

Specified by:
doStartTag in interface javax.servlet.jsp.tagext.Tag
Overrides:
doStartTag in class QueryExecutingTag
Throws:
javax.servlet.jsp.JspTagException

doEndTag

public int doEndTag()
             throws javax.servlet.jsp.JspException
Process the end tag.

Specified by:
doEndTag in interface javax.servlet.jsp.tagext.Tag
Overrides:
doEndTag in class QueryExecutingTag
Throws:
javax.servlet.jsp.JspException

release

public void release()
Resets the state of the Tag.

Specified by:
release in interface javax.servlet.jsp.tagext.Tag
Overrides:
release in class QueryExecutingTag

setVar

public void setVar(String var)


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