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## org.apache.struts.taglib.html
Class OptionsCollectionTag

    java.lang.Object
      javax.servlet.jsp.tagext.TagSupport
          org.apache.struts.taglib.html.OptionsCollectionTag

All Implemented Interfaces:
  Serializable, IterationTag, Tag

Direct Known Subclasses:
  NestedOptionsCollectionTag

    public class OptionsCollectionTag

extends TagSupport

Tag for creating multiple <select> options from a collection. The collection may be part of the enclosing form, or may be independent of the form. Each element of the collection must expose a 'label' and a 'value', the property names of which are configurable by attributes of this tag.

The 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.

Since:
  Struts 1.1
Version:
  $Rev: 471754 $ $Date: 2004-11-03 14:20:47 -0500 (Wed, 03 Nov 2004) $
See Also:
  Serialized Form

Field Summary
`protected boolean` | `filter` Should the label values be filtered for HTML sensitive characters?
`protected String` | `label` The name of the bean property containing the label.
`protected static 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.
`protected String` | `value` The name of the bean property containing the value.

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
`OptionsCollectionTag()`

Method Summary
`protected void` | `addOption(StringBuffer sb, String label, String value, boolean matched)` Add an option element to the specified StringBuffer based on the specified parameters.
`int` | `doStartTag()` Process the start of this tag.
`boolean` | `getFilter()`
`protected Iterator` | `getIterator(Object collection)` Return an iterator for the options collection.
`String` | `getLabel()`
`String` | `getName()`
`String` | `getProperty()`
`String` | `getStyle()`
`String` | `getStyleClass()`
`String` | `getValue()`
`void` | `release()` Release any acquired resources.
`void` | `setFilter(boolean filter)`
`void` | `setLabel(String label)`
`void` | `setName(String name)`
`void` | `setProperty(String property)`
`void` | `setStyle(String style)`
`void` | `setStyleClass(String styleClass)`
`void` | `setValue(String value)`

Methods inherited from class javax.servlet.jsp.tagext.TagSupport
`doAfterBody, doEndTag, 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 MessageResources messages

  The message resources for this package.

### filter

    protected boolean filter

  Should the label values be filtered for HTML sensitive characters?

### label

    protected String label

  The name of the bean property containing the label.

### 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.

### value

    protected String value

  The name of the bean property containing the value.

Constructor Detail

### OptionsCollectionTag

    public OptionsCollectionTag()

Method Detail

### getFilter

    public boolean getFilter()

### setFilter

    public void setFilter(boolean filter)

### getLabel

    public String getLabel()

### setLabel

    public void setLabel(String label)

### 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)

### getValue

    public String getValue()

### setValue

    public void setValue(String value)

### 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

### 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 label,
                             String value,
                             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(Object collection)
                            throws JspException

  Return an iterator for the options collection.

  Parameters:
    `collection` - Collection to be iterated over
  Throws:
    `JspException` - if an error occurs

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