org.apache.struts.taglib.html
Class OptionsTag

java.lang.Object
  extended by javax.servlet.jsp.tagext.TagSupport
      extended by org.apache.struts.taglib.html.OptionsTag
All Implemented Interfaces:
Serializable, IterationTag, Tag
Direct Known Subclasses:
NestedOptionsTag

public class OptionsTag
extends TagSupport

Tag for creating multiple <select> options from a collection. The associated values displayed to the user may optionally be specified by a second collection, or will be the same as the values themselves. Each collection may be an array of objects, a Collection, an Enumeration, an Iterator, or a Map. NOTE - This tag requires a Java2 (JDK 1.2 or later) platform.

See Also:
Serialized Form

Field Summary
protected  String collection
          The name of the collection containing beans that have properties to provide both the values and the labels (identified by the property and labelProperty attributes).
protected  boolean filter
          Should the label values be filtered for HTML sensitive characters?
protected  String labelName
          The name of the bean containing the labels collection.
protected  String labelProperty
          The bean property containing the labels collection.
protected static org.apache.struts.util.MessageResources messages
          The message resources for this package.
protected  String name
          The name of the bean containing the values collection.
protected  String property
          The name of the property to use to build the values collection.
 
Fields inherited from class javax.servlet.jsp.tagext.TagSupport
id, pageContext
 
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
OptionsTag()
           
 
Method Summary
protected  void addOption(StringBuffer sb, String value, String label, boolean matched)
          Add an option element to the specified StringBuffer based on the specified parameters.
 int doEndTag()
          Process the end of this tag.
 int doStartTag()
          Process the start of this tag.
 String getCollection()
           
 boolean getFilter()
           
protected  Iterator getIterator(String name, String property)
          Return an iterator for the option labels or values, based on our configured properties.
 String getLabelName()
           
 String getLabelProperty()
           
 String getName()
           
 String getProperty()
           
 String getStyle()
           
 String getStyleClass()
           
 void release()
          Release any acquired resources.
 void setCollection(String collection)
           
 void setFilter(boolean filter)
           
 void setLabelName(String labelName)
           
 void setLabelProperty(String labelProperty)
           
 void setName(String name)
           
 void setProperty(String property)
           
 void setStyle(String style)
           
 void setStyleClass(String styleClass)
           
 
Methods inherited from class javax.servlet.jsp.tagext.TagSupport
doAfterBody, 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
 

Field Detail

messages

protected static org.apache.struts.util.MessageResources messages
The message resources for this package.


collection

protected String collection
The name of the collection containing beans that have properties to provide both the values and the labels (identified by the property and labelProperty attributes).


filter

protected boolean filter
Should the label values be filtered for HTML sensitive characters?


labelName

protected String labelName
The name of the bean containing the labels collection.


labelProperty

protected String labelProperty
The bean property containing the labels collection.


name

protected String name
The name of the bean containing the values collection.


property

protected String property
The name of the property to use to build the values collection.

Constructor Detail

OptionsTag

public OptionsTag()
Method Detail

getCollection

public String getCollection()

setCollection

public void setCollection(String collection)

getFilter

public boolean getFilter()

setFilter

public void setFilter(boolean filter)

getLabelName

public String getLabelName()

setLabelName

public void setLabelName(String labelName)

getLabelProperty

public String getLabelProperty()

setLabelProperty

public void setLabelProperty(String labelProperty)

getName

public String getName()

setName

public void setName(String name)

getProperty

public String getProperty()

setProperty

public void setProperty(String property)

getStyle

public String getStyle()

setStyle

public void setStyle(String style)

getStyleClass

public String getStyleClass()

setStyleClass

public void setStyleClass(String styleClass)

doStartTag

public int doStartTag()
               throws JspException
Process the start of this tag.

Specified by:
doStartTag in interface Tag
Overrides:
doStartTag in class TagSupport
Throws:
JspException - if a JSP exception has occurred

doEndTag

public int doEndTag()
             throws JspException
Process the end of this tag.

Specified by:
doEndTag in interface Tag
Overrides:
doEndTag in class TagSupport
Throws:
JspException - if a JSP exception has occurred

release

public void release()
Release any acquired resources.

Specified by:
release in interface Tag
Overrides:
release in class TagSupport

addOption

protected void addOption(StringBuffer sb,
                         String value,
                         String label,
                         boolean matched)
Add an option element to the specified StringBuffer based on the specified parameters.

Note that this tag specifically does not support the styleId tag attribute, which causes the HTML id attribute to be emitted. This is because the HTML specification states that all "id" attributes in a document have to be unique. This tag will likely generate more than one option element element, but it cannot use the same id value. It's conceivable some sort of mechanism to supply an array of id values could be devised, but that doesn't seem to be worth the trouble.

Parameters:
sb - StringBuffer accumulating our results
value - Value to be returned to the server for this option
label - Value to be shown to the user for this option
matched - Should this value be marked as selected?

getIterator

protected Iterator getIterator(String name,
                               String property)
                        throws JspException
Return an iterator for the option labels or values, based on our configured properties.

Parameters:
name - Name of the bean attribute (if any)
property - Name of the bean property (if any)
Throws:
JspException - if an error occurs


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