package net.wargrey.application;
import java.awt.Component;
import javax.swing.JOptionPane;
/**
* This class <code>ExceptionManager</code> and its subclasses are a form of
* <code>Exception</code>. It is used to wrap all the <code>Throwable</code> instances
* and handle them in a unified way. It will show the information which consists of
* StackTraces and Messages by using JOptionPanel.
*
* @author Estelle
* @version 1.0
* @see java.lang.Exception
* @since jdk 1.5
*/
public class ExceptionManager extends RuntimeException {
/**
* This field <code>alerter</code> is used to show the information the Class offered.
*
* @see javax.swing.JOptionPane
*/
private JOptionPane alerter;
/**
* This static method create an instance of the ExceptionManager by invoking the
* constructor <code>ExceptionManager(String msg)</code>.
*
* @param msg The message will pass the specified constructor
* @return An instance of the ExceptionManager created by invoking the constructor
* <code>ExceptionManager(String msg)</code>.
*/
public static ExceptionManager wrap(String msg){
return new ExceptionManager(msg);
}
/**
* This static method create an instance of the ExceptionManager by invoking the
* constructor <code>ExceptionManager(Throwable throwable)</code>.
*
* @param throwable The cause will pass the specified constructor
* @return An instance of the ExceptionManager created by invoking the constructor
* <code>ExceptionManager(Throwable throwable)</code>.
*/
public static ExceptionManager wrap(Throwable throwable){
return new ExceptionManager(throwable);
}
/**
* This static method create an instance of the ExceptionManager by invoking the
* constructor <code>ExceptionManager(String msg,Throwable throwable)</code>.
*
* @param msg The message will pass the specified constructor
* @param throwable The cause will pass the specified constructor
* @return An instance of the ExceptionManager created by invoking the constructor
* <code>ExceptionManager(String msg, Throwable throwable)</code>
*/
public static ExceptionManager wrap(String msg,Throwable throwable){
return new ExceptionManager(msg,throwable);
}
/**
* Constructs a new instance with the specified detail message. The concrete handler
* is its super class. This constructor always used to construct a custom exception
* not wrapping the exist exception.
*
* @param msg the detail message which is the part of the information will be
* shown.
*/
public ExceptionManager(String msg){
super(msg);
}
/**
* Constructs a new instance with the specified detail cause. The concrete handler
* is its super class. This constructor always used to wrap an exist exception.
*
* @param throwable the cause which has been caught. It's detail message and
* stacktrace are the parts the information will be shown.
*/
public ExceptionManager(Throwable throwable){
super(throwable);
}
/**
* Constructs a new instance with the specified detail message and cause. The
* concrete handler is its super class. This constructor always used to construct
* an exception wrapping the exist exception but requires a custom message.
*
* @param msg the detail message which is the part of the information will
* be shown.
* @param throwable the cause which has been caught. It's stacktrace is the parts
* the information will be shown.
*/
public ExceptionManager(String msg,Throwable throwable){
super(msg,throwable);
}
/**
* Show the information with everything is default.
*/
public synchronized void alert(){
alert((Component)null);
}
/**
* Show the information in a dialog with the specified title
* "ThrowableManager Alerter". The dialog belongs to the given component which
* default is the screen.
*
* @param parent The component cause the exception.
*/
public synchronized void alert(Component parent){
alert(parent,"ThrowableManager Alerter");
}
/**
* Show the information in a dialog with the specified title.
*
* @param title The title of the dialog.
*/
public synchronized void alert(String title){
alert((Component)null,title);
}
/**
* Show the information in a dialog which has the specified title and belongs to the
* specified component.
*
* @param parent The component cause the exception.
* @param title The title of the dialog.
*/
public synchronized void alert(Component parent,String title){
StringBuilder errorMessage=new StringBuilder();
errorMessage.append(this.toString());
for (StackTraceElement st:((this.getCause()==null)?this:this.getCause()).getStackTrace()){
errorMessage.append("\n\t at ");
errorMessage.append(st.toString());
}
alerter.showMessageDialog(parent, errorMessage, title ,JOptionPane.ERROR_MESSAGE);
System.err.println(errorMessage);
}
}
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