HiddenFieldPositioner (Tapestry API - 5.7.0)

java.lang.Object
- org.apache.tapestry5.corelib.internal.HiddenFieldPositioner

```
public class HiddenFieldPositioner
extends Object
```
Used to position a hidden field (as part of a form-related component). Hidden fields are not allowed to go just anywhere, there are rules, dictated by the (X)HTML schema, about where they are allowed. We use the MarkupWriterListener interface to monitor elements as they are started and ended to find a place to put content.

Constructor Summary

Constructors
Constructor Description

HiddenFieldPositioner(MarkupWriter writer, HiddenFieldLocationRules rules)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`discard()`	Discard this positioner (an alternative to invoking `getElement()`).
`Element`	`getElement()`	Returns the hidden field element, which can have its attributes filled in.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - HiddenFieldPositioner
```
public HiddenFieldPositioner(MarkupWriter writer,
                             HiddenFieldLocationRules rules)
```
- Method Detail
  - getElement
```
public Element getElement()
```
    Returns the hidden field element, which can have its attributes filled in.
    
    Returns:
    
    the element
    
    Throws:
    
    IllegalStateException - if the element was not positioned
  - discard
```
public void discard()
```
    Discard this positioner (an alternative to invoking getElement()). If an Element has been created for the hidden field, that element is removed.
    
    Since:
    
    5.2.0