org.exolab.adaptx.xslt.util

Class DefaultObserver

public class DefaultObserver extends Object implements MessageObserver, ErrorObserver

A simple implementation of MessageObserver and ErrorObserver. This observer is cascading, which means you can add observers to it, and it will cascade notifications.

Version: $Revision: 3633 $ $Date: 2003-03-01 02:38:44 -0500 (Sat, 01 Mar 2003) $

Author: Keith Visco

Constructor Summary
DefaultObserver()
Creates a new SimpleMessageObserver which will print messages to the console.
DefaultObserver(boolean allErrorsFatal)
Creates a new SimpleMessageObserver which will print messages to the console.
DefaultObserver(Writer writer)
Creates a new SimpleMessageObserver which will print messages to the console.
DefaultObserver(Writer writer, boolean allErrorsFatal)
Creates a new SimpleMessageObserver which will print messages to the console.
Method Summary
voidaddErrorObserver(ErrorObserver observer)
Adds the given ErrorObserver to this DefaultObserver
voidaddMessageObserver(MessageObserver observer)
Adds the given MessageObserver to this DefaultObserver
voidreceiveError(Exception exception)
Signals an error with normal level
voidreceiveError(Exception exception, String message)
Signals an error with normal level
voidreceiveError(Exception exception, int level)
Signals an error with the given error level
voidreceiveError(Exception exception, String message, int level)
Signals an error with the given error level
voidreceiveError(String message)
Signals an error message with normal level
voidreceiveError(String message, int level)
Signals an error message with the given error level
voidreceiveMessage(String message)
Notifies this observer of a new message
voidremoveAllErrorObservers()
Removes all the ErrorObservers from the cascading ErrorObserver list
voidremoveAllMessageObservers()
Removes all the MessageObservers from the cascading ErrorObserver list
voidremoveErrorObserver(ErrorObserver observer)
Removes the given ErrorObserver from the cascading ErrorObserver list
voidremoveMessageObserver(MessageObserver observer)
Removes the given MessageObserver from the cascading MessageObserver list
voidsetWriter(Writer writer)
Sets the Writer of this MessageObserver

Constructor Detail

DefaultObserver

public DefaultObserver()
Creates a new SimpleMessageObserver which will print messages to the console. A fatal error will cause a RuntimeException.

DefaultObserver

public DefaultObserver(boolean allErrorsFatal)
Creates a new SimpleMessageObserver which will print messages to the console. A fatal error will cause a RuntimeException.

Parameters: allErrorsFatal a boolean, when true will treat all errors as fatal errors (excludes warnings).

DefaultObserver

public DefaultObserver(Writer writer)
Creates a new SimpleMessageObserver which will print messages to the console. A fatal error will cause a RuntimeException.

Parameters: writer the Writer to print messages to. This writer may be null, to create a null sink.

DefaultObserver

public DefaultObserver(Writer writer, boolean allErrorsFatal)
Creates a new SimpleMessageObserver which will print messages to the console. A fatal error will cause a RuntimeException.

Parameters: writer the Writer to print messages to. This writer may be null, to create a null sink. allErrorsFatal a boolean, when true will treat all errors as fatal errors (excludes warnings).

Method Detail

addErrorObserver

public void addErrorObserver(ErrorObserver observer)
Adds the given ErrorObserver to this DefaultObserver

Parameters: observer the ErrorObserver to add

addMessageObserver

public void addMessageObserver(MessageObserver observer)
Adds the given MessageObserver to this DefaultObserver

Parameters: observer the MessageObserver to add

receiveError

public void receiveError(Exception exception)
Signals an error with normal level

Parameters: exception the Exception that caused the error

receiveError

public void receiveError(Exception exception, String message)
Signals an error with normal level

Parameters: exception the Exception that caused the error message an option message, used when additional information can be provided.

receiveError

public void receiveError(Exception exception, int level)
Signals an error with the given error level

Parameters: exception the Exception that caused the error level the error level

receiveError

public void receiveError(Exception exception, String message, int level)
Signals an error with the given error level

Parameters: exception the Exception that caused the error message an option message, used when additional information can be provided. level the error level

receiveError

public void receiveError(String message)
Signals an error message with normal level

Parameters: message the error message

receiveError

public void receiveError(String message, int level)
Signals an error message with the given error level

Parameters: message the error message level the error level

receiveMessage

public void receiveMessage(String message)
Notifies this observer of a new message

Parameters: message the message to observe

removeAllErrorObservers

public void removeAllErrorObservers()
Removes all the ErrorObservers from the cascading ErrorObserver list

removeAllMessageObservers

public void removeAllMessageObservers()
Removes all the MessageObservers from the cascading ErrorObserver list

removeErrorObserver

public void removeErrorObserver(ErrorObserver observer)
Removes the given ErrorObserver from the cascading ErrorObserver list

Parameters: observer the ErrorObserver to remove

removeMessageObserver

public void removeMessageObserver(MessageObserver observer)
Removes the given MessageObserver from the cascading MessageObserver list

Parameters: observer the MessageObserver to remove

setWriter

public void setWriter(Writer writer)
Sets the Writer of this MessageObserver

Parameters: writer the Writer to print messages to