ReadOnlyException (Portlet 4.0 API Specification)

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - jakarta.portlet.PortletException
    - - jakarta.portlet.ReadOnlyException

All Implemented Interfaces:

Serializable
```
public class ReadOnlyException
extends PortletException
```
The ReadOnlyException is thrown when a portlet tries to change the value for a read-only preference attribute.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`ReadOnlyException(String text)`	Constructs a new read-only exception with the given text.
`ReadOnlyException(String text, Throwable cause)`	Constructs a new read-only exception when the portlet needs to do the following: throw an exception include a message about the "root cause" that interfered with its normal operation include a description message
`ReadOnlyException(Throwable cause)`	Constructs a new read-only exception when the portlet needs to throw an exception.

Method Summary
- Methods inherited from class java.lang.Throwable
  addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ReadOnlyException
```
public ReadOnlyException(String text)
```
    Constructs a new read-only exception with the given text. The portlet container may use the text write it to a log.
    
    Parameters:
    
    text - the exception text
  - ReadOnlyException
```
public ReadOnlyException(String text,
                         Throwable cause)
```
    Constructs a new read-only exception when the portlet needs to do the following:
    
    throw an exception
    
    include a message about the "root cause" that interfered with its normal operation
    
    include a description message
    Parameters:
    
    text - the exception text
    
    cause - the root cause
  - ReadOnlyException
```
public ReadOnlyException(Throwable cause)
```
    Constructs a new read-only exception when the portlet needs to throw an exception. The exception message is based on the localized message of the underlying exception.
    
    Parameters:
    
    cause - the root cause