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## com.sas.servlet.tbeans.form.html
Class Hidden

    com.sas.servlet.tbeans.form.html.Hidden

All Implemented Interfaces:
  com.sas.beans.PropertyChangeSource, com.sas.lang.ObjectDataInterface, FormElementModificationEventInterface, com.sas.servlet.tbeans.form.JavaScriptObjectCreationInterface, com.sas.servlet.tbeans.JavaScriptEventHandlerInterface, RenderableInterface, StyleInterface, TransformationInterface, GenericValidatorInterface, com.sas.util.WriteToPrintWriterInterface, java.io.Serializable

    public class Hidden

implements StyleInterface

The Hidden is a TransformationBean™ that generates the appropriate HTML 4.0 for creating hidden HTML input fields. Hidden fields should not be rendered on the client and provide a means for servers to store state information with a form. This will be passed back to the server when the form is submitted. This is a workaround for the statelessness of HTTP.

The Hidden is one of several TransformationBeans™ that rely on a set of style classes that are used by default when generating the resulting markup language. For more information on style sheets and the default style classes that apply to this TransformationBean™, refer to the AppDev Studio Developer Site. You'll find a useful reference document entitled Cascading Style Sheets, Images, and TransformationBeans™ as well as the TransformationBeans™ Style Sheet Reference.

Note that the toString() method on this class calls the `write` method, which may have undesirable side effects. See BaseTransformation.toString() for more information. Debuggers often use toString() to show the value of a variable, and this may cause unexpected behavior while debugging

For More Information:

Visit the AppDev Studio Developer's Site to access step-by-step examples, white papers and additional usage information at http://support.sas.com/rnd/appdev/.

Examples for this class may be found on the Examples Site.

JSP custom tags provide an alternative to using the TransformationBeans™. Visit the Custom Tag Library Reference for additional information on the sas:Hidden custom tag.

Note: A snapshot of the AppDev Studio Developers Site is installed on your local Web server when you install AppDev Studio. To access the site from webAF, select Help -> Developer Site .

See Also:
  Serialized Form

Field Summary

Fields inherited from class com.sas.servlet.tbeans.form.BaseFormElement
`RB_KEY`

Constructor Summary
`Hidden()` Constructs a new Hidden Transformation Bean
`Hidden(java.lang.String name, java.lang.String value)` Constructs a new Hidden Transformation Bean with a specified name and value.

Method Summary
`void` | `write(java.io.PrintWriter out)` Writes the transformed representation of the object

Methods inherited from class com.sas.servlet.tbeans.form.BaseHidden
`getText, setText`

Methods inherited from class com.sas.servlet.tbeans.form.BaseFormElement
`getAccessKey, getErrorHandler, getModificationEventName, getName, getOnBlur, getOnChange, getOnClick, getOnDblClick, getOnFocus, getOnKeyDown, getOnKeyPress, getOnKeyUp, getOnMouseDown, getOnMouseMove, getOnMouseOut, getOnMouseOver, getOnMouseUp, getOnSelect, getStyleInfo, getTabIndex, getTitle, getValidationFunctions, getValidator, isEnabled, isValid, isValidationEnabled, setAccessKey, setEnabled, setErrorHandler, setId, setModificationEventName, setName, setOnBlur, setOnChange, setOnClick, setOnDblClick, setOnFocus, setOnKeyDown, setOnKeyPress, setOnKeyUp, setOnMouseDown, setOnMouseMove, setOnMouseOut, setOnMouseOver, setOnMouseUp, setOnSelect, setStyleInfo, setTabIndex, setTitle, setValidator, writeJavaScriptObject, writeJavaScriptObjectValidate, writeJavaScriptValidatorObject, writeValidationScript`

Methods inherited from class com.sas.servlet.tbeans.BaseTransformation
`addPropertyChangeListener, addPropertyChangeListener, cleanUpResources, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getCustomAttributes, getDescription, getId, getInputTransform, getLocale, getObjectData, getObjectDataProperty, getOutputTransform, getRequest, getResponse, getTagEpilog, getTagProlog, hasListeners, isCleanUpResourcesOn, isVisible, removePropertyChangeListener, removePropertyChangeListener, setCleanUpResourcesOn, setCustomAttributes, setDescription, setInputTransform, setLocale, setLocaleDependentProperties, setObjectData, setObjectDataProperty, setOutputTransform, setRequest, setResponse, setTagEpilog, setTagProlog, setVisible, toString, write, write, write`

Methods inherited from interface com.sas.servlet.tbeans.StyleInterface
`getStyleInfo, setStyleInfo`

Constructor Detail

### Hidden

    public Hidden()

  Constructs a new Hidden Transformation Bean

### Hidden

    public Hidden(java.lang.String name,
                  java.lang.String value)

  Constructs a new Hidden Transformation Bean with a specified name and value.

  Parameters:
    `name` - The hidden field name
    `value` - The hidden field value

Method Detail

### write

    public void write(java.io.PrintWriter out)
               throws java.io.IOException

  Writes the transformed representation of the object

  Specified by:
    `write` in interface `TransformationInterface`
  Specified by:
    `write` in interface `com.sas.util.WriteToPrintWriterInterface`
  Overrides:
    `write` in class `BaseFormElement`
  Parameters:
    `out` - The output stream
  Throws:
    `java.io.IOException` - Thrown if some type of I/O error occurs

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Copyright © 2009 SAS Institute Inc. All Rights Reserved.