org.apache.taglibs.string
Class DefaultTag

java.lang.Object
  extended byjavax.servlet.jsp.tagext.TagSupport
      extended byjavax.servlet.jsp.tagext.BodyTagSupport
          extended byorg.apache.taglibs.string.StringTagSupport
              extended byorg.apache.taglibs.string.DefaultTag
All Implemented Interfaces:
javax.servlet.jsp.tagext.BodyTag, javax.servlet.jsp.tagext.IterationTag, java.io.Serializable, javax.servlet.jsp.tagext.Tag

public class DefaultTag
extends StringTagSupport

If the body String is a particular value, then output a default value, else output the body String. The major use of this is to convert 'null' into an empty String.

value
Value to be equal to. Default is the string: "null".
default
Value to place if body is equal to value field. Default is an empty String.

Author:
bayard@generationjava.com
See Also:
Serialized Form

Field Summary
 
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
DefaultTag()
           
 
Method Summary
 java.lang.String changeString(java.lang.String text)
          Perform a transformation on the passed in String.
 java.lang.String getDefault()
          Get the default property
 java.lang.String getValue()
          Get the value property
 void initAttributes()
          Initialise any properties to default values.
 void setDefault(java.lang.String defaultValue)
          Set the default property
 void setValue(java.lang.String value)
          Set the value property
 
Methods inherited from class org.apache.taglibs.string.StringTagSupport
doEndTag, evaluateString, getVar, setVar
 
Methods inherited from class javax.servlet.jsp.tagext.BodyTagSupport
doAfterBody, doInitBody, doStartTag, getBodyContent, getPreviousOut, release, 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
 

Constructor Detail

DefaultTag

public DefaultTag()
Method Detail

getValue

public java.lang.String getValue()
Get the value property

Returns:
String property

setValue

public void setValue(java.lang.String value)
Set the value property

Parameters:
value - String property

getDefault

public java.lang.String getDefault()
Get the default property

Returns:
String property

setDefault

public void setDefault(java.lang.String defaultValue)
Set the default property


changeString

public java.lang.String changeString(java.lang.String text)
                              throws javax.servlet.jsp.JspException
Description copied from class: StringTagSupport
Perform a transformation on the passed in String.

Specified by:
changeString in class StringTagSupport
Parameters:
text - String to be manipulated
Returns:
String result of operation upon passed in String
Throws:
javax.servlet.jsp.JspException

initAttributes

public void initAttributes()
Description copied from class: StringTagSupport
Initialise any properties to default values. This method is called upon construction, and after changeString(String) is called. This is a default empty implementation.

Overrides:
initAttributes in class StringTagSupport


Copyright ? 2000-2004 The Apache Software Foundation. All Rights Reserved.