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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * accompanied this code).
 *
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package java.rmi;

A RemoteException is the common superclass for a number of communication-related exceptions that may occur during the execution of a remote method call. Each method of a remote interface, an interface that extends java.rmi.Remote, must list RemoteException in its throws clause. 
As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "wrapped remote exception" that may be provided at construction time and accessed via the public detail field is now known as the cause, and may be accessed via the Throwable.getCause() method, as well as the aforementioned "legacy field." 
Invoking the method Throwable.initCause(Throwable) on an instance of RemoteException always throws IllegalStateException. 
Author:
 Ann Wollrath
Since:
  1.1/**
 * A {@code RemoteException} is the common superclass for a number of
 * communication-related exceptions that may occur during the execution of a
 * remote method call.  Each method of a remote interface, an interface that
 * extends {@code java.rmi.Remote}, must list
 * {@code RemoteException} in its throws clause.
 *
 * <p>As of release 1.4, this exception has been retrofitted to conform to
 * the general purpose exception-chaining mechanism.  The "wrapped remote
 * exception" that may be provided at construction time and accessed via
 * the public {@link #detail} field is now known as the <i>cause</i>, and
 * may be accessed via the {@link Throwable#getCause()} method, as well as
 * the aforementioned "legacy field."
 *
 * <p>Invoking the method {@link Throwable#initCause(Throwable)} on an
 * instance of {@code RemoteException} always throws {@link
 * IllegalStateException}.
 *
 * @author  Ann Wollrath
 * @since   1.1
 */
public class RemoteException extends java.io.IOException {

    /* indicate compatibility with JDK 1.1.x version of class */
    private static final long serialVersionUID = -5148567311918794206L;

    
The cause of the remote exception.
This field predates the general-purpose exception chaining facility. The Throwable.getCause() method is now the preferred means of obtaining this information. 
@serial
/**
     * The cause of the remote exception.
     *
     * <p>This field predates the general-purpose exception chaining facility.
     * The {@link Throwable#getCause()} method is now the preferred means of
     * obtaining this information.
     *
     * @serial
     */
    public Throwable detail;

    
Constructs a RemoteException. /**
     * Constructs a {@code RemoteException}.
     */
    public RemoteException() {
        initCause(null);  // Disallow subsequent initCause
    }

    
Constructs a RemoteException with the specified detail message. 
Params:
s – the detail message/**
     * Constructs a {@code RemoteException} with the specified
     * detail message.
     *
     * @param s the detail message
     */
    public RemoteException(String s) {
        super(s);
        initCause(null);  // Disallow subsequent initCause
    }

    
Constructs a RemoteException with the specified detail message and cause. This constructor sets the detail field to the specified Throwable. 
Params:
s – the detail message
cause – the cause/**
     * Constructs a {@code RemoteException} with the specified detail
     * message and cause.  This constructor sets the {@link #detail}
     * field to the specified {@code Throwable}.
     *
     * @param s the detail message
     * @param cause the cause
     */
    public RemoteException(String s, Throwable cause) {
        super(s);
        initCause(null);  // Disallow subsequent initCause
        detail = cause;
    }

    
Returns the detail message, including the message from the cause, if
any, of this exception.
Returns:
the detail message/**
     * Returns the detail message, including the message from the cause, if
     * any, of this exception.
     *
     * @return the detail message
     */
    public String getMessage() {
        if (detail == null) {
            return super.getMessage();
        } else {
            return super.getMessage() + "; nested exception is: \n\t" +
                detail.toString();
        }
    }

    
Returns the cause of this exception. This method returns the value of the detail field. 
Returns:
 the cause, which may be null.
Since:
  1.4/**
     * Returns the cause of this exception.  This method returns the value
     * of the {@link #detail} field.
     *
     * @return  the cause, which may be {@code null}.
     * @since   1.4
     */
    public Throwable getCause() {
        return detail;
    }
}