SOAPExceptionImpl object may contain a String
* that gives the reason for the exception, an embedded
* Throwable object, or both. This class provides methods
* for retrieving reason messages and for retrieving the embedded
* Throwable object.
*
* Typical reasons for throwing a SOAPExceptionImpl
* object are problems such as difficulty setting a header, not being
* able to send a message, and not being able to get a connection with
* the provider. Reasons for embedding a Throwable
* object include problems such as input/output errors or a parsing
* problem, such as an error in parsing a header.
*/
public class SOAPExceptionImpl extends SOAPException {
private Throwable cause;
/**
* Constructs a SOAPExceptionImpl object with no
* reason or embedded Throwable object.
*/
public SOAPExceptionImpl() {
super();
this.cause = null;
}
/**
* Constructs a SOAPExceptionImpl object with the given
* String as the reason for the exception being thrown.
*
* @param reason a description of what caused the exception
*/
public SOAPExceptionImpl(String reason) {
super(reason);
this.cause = null;
}
/**
* Constructs a SOAPExceptionImpl object with the given
* String as the reason for the exception being thrown
* and the given Throwable object as an embedded
* exception.
*
* @param reason a description of what caused the exception
* @param cause a Throwable object that is to
* be embedded in this SOAPExceptionImpl object
*/
public SOAPExceptionImpl(String reason, Throwable cause) {
super (reason);
initCause(cause);
}
/**
* Constructs a SOAPExceptionImpl object initialized
* with the given Throwable object.
* @param cause cause
*/
public SOAPExceptionImpl(Throwable cause) {
super (cause.toString());
initCause(cause);
}
/**
* Returns the detail message for this SOAPExceptionImpl
* object.
*
* If there is an embedded Throwable object, and if the
* SOAPExceptionImpl object has no detail message of its
* own, this method will return the detail message from the embedded
* Throwable object.
*
* @return the error or warning message for this
* SOAPExceptionImpl or, if it has none, the
* message of the embedded Throwable object,
* if there is one
*/
@Override
public String getMessage() {
String message = super.getMessage ();
if (message == null && cause != null) {
return cause.getMessage();
} else {
return message;
}
}
/**
* Returns the Throwable object embedded in this
* SOAPExceptionImpl if there is one. Otherwise, this method
* returns null.
*
* @return the embedded Throwable object or null
* if there is none
*/
@Override
public Throwable getCause() {
return cause;
}
/**
* Initializes the cause field of this SOAPExceptionImpl
* object with the given Throwable object.
*
* This method can be called at most once. It is generally called from
* within the constructor or immediately after the constructor has
* returned a new SOAPExceptionImpl object.
* If this SOAPExceptionImpl object was created with the
* constructor {@link #SOAPExceptionImpl(Throwable)} or
* {@link #SOAPExceptionImpl(String,Throwable)}, meaning that its
* cause field already has a value, this method cannot be
* called even once.
*
* @param cause the Throwable object that caused this
* SOAPExceptionImpl object to be thrown. The value of this
* parameter is saved for later retrieval by the
* {@link #getCause()} method. A {@code null} value is
* permitted and indicates that the cause is nonexistent or
* unknown.
* @return a reference to this SOAPExceptionImpl instance
* @throws IllegalArgumentException if cause is this
* Throwable object. (A Throwable object
* cannot be its own cause.)
* @throws IllegalStateException if this SOAPExceptionImpl object
* was created with {@link #SOAPExceptionImpl(Throwable)} or
* {@link #SOAPExceptionImpl(String,Throwable)}, or this
* method has already been called on this SOAPExceptionImpl
* object
*/
@Override
public synchronized Throwable initCause(Throwable cause)
{
if(this.cause != null) {
throw new IllegalStateException("Can't override cause");
}
if(cause == this) {
throw new IllegalArgumentException("Self-causation not permitted");
}
this.cause = cause;
return this;
}
@Override
public void printStackTrace() {
super.printStackTrace();
if (cause != null) {
System.err.println("\nCAUSE:\n");
cause.printStackTrace();
}
}
@Override
public void printStackTrace(PrintStream s) {
super.printStackTrace(s);
if (cause != null) {
s.println("\nCAUSE:\n");
cause.printStackTrace(s);
}
}
@Override
public void printStackTrace(PrintWriter s) {
super.printStackTrace(s);
if (cause != null) {
s.println("\nCAUSE:\n");
cause.printStackTrace(s);
}
}
}