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package org.bouncycastle.jce.cert;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.security.GeneralSecurityException;
/**
* An exception indicating one of a variety of problems encountered
* when building a certification path with a
* <code>CertPathBuilder</code>.<br />
* <br />
* A <code>CertPathBuilderException</code> provides support for
* wrapping exceptions. The {@link #getCause() getCause} method
* returns the throwable, if any, that caused this exception to be
* thrown.<br />
* <br />
* <strong>Concurrent Access</strong><br />
* <br />
* Unless otherwise specified, the methods defined in this class are
* not thread-safe. Multiple threads that need to access a single
* object concurrently should synchronize amongst themselves and
* provide the necessary locking. Multiple threads each manipulating
* separate objects need not synchronize.
*
* @see CertPathBuilder
**/
public class CertPathBuilderException extends GeneralSecurityException
{
private Throwable cause;
/**
* Creates a <code>CertPathBuilderException</code> with <code>null</code>
* as its detail message.
*/
public CertPathBuilderException()
{
}
/**
* Creates a <code>CertPathBuilderException</code> with the given detail
* message. The detail message is a <code>String</code> that describes
* this particular exception in more detail.
*
* @param msg
* the detail message
*/
public CertPathBuilderException(String message)
{
super(message);
}
/**
* Creates a <code>CertPathBuilderException</code> that wraps the
* specified throwable. This allows any exception to be converted into a
* <code>CertPathBuilderException</code>, while retaining information
* about the wrapped exception, which may be useful for debugging. The
* detail message is set to
* <code>(cause==null ? null : cause.toString())</code> (which typically
* contains the class and detail message of cause).
*
* @param cause
* the cause (which is saved for later retrieval by the
* {@link #getCause()} method). (A null value is permitted, and
* indicates that the cause is nonexistent or unknown.)
*/
public CertPathBuilderException(String message, Throwable cause)
{
super(message);
this.cause = cause;
}
/**
* Creates a <code>CertPathBuilderException</code> with the specified
* detail message and cause.
*
* @param msg
* the detail message
* @param cause
* the cause (which is saved for later retrieval by the
* {@link #getCause()} method). (A null value is permitted, and
* indicates that the cause is nonexistent or unknown.)
*/
public CertPathBuilderException(Throwable cause)
{
this.cause = cause;
}
/**
* Returns the internal (wrapped) cause, or null if the cause is nonexistent
* or unknown.
*
* @return the cause of this throwable or <code>null</code> if the cause
* is nonexistent or unknown.
*/
public Throwable getCause()
{
return cause;
}
/**
* Returns the detail message for this CertPathBuilderException.
*
* @return the detail message, or <code>null</code> if neither the message
* nor internal cause were specified
*/
public String getMessage()
{
String message = super.getMessage();
if (message == null && cause == null)
{
return null;
}
if (cause != null)
{
return cause.getMessage();
}
return message;
}
/**
* Returns a string describing this exception, including a description of
* the internal (wrapped) cause if there is one.
*
* @return a string representation of this
* <code>CertPathBuilderException</code>
*/
public String toString()
{
String message = getMessage();
if (message == null)
{
return "";
}
return message;
}
/**
* Prints a stack trace to <code>System.err</code>, including the
* backtrace of the cause, if any.
*/
public void printStackTrace()
{
printStackTrace(System.err);
}
/**
* Prints a stack trace to a <code>PrintStream</code>, including the
* backtrace of the cause, if any.
*
* @param ps
* the <code>PrintStream</code> to use for output
*/
public void printStackTrace(PrintStream ps)
{
super.printStackTrace(ps);
if (getCause() != null)
{
getCause().printStackTrace(ps);
}
}
/**
* Prints a stack trace to a <code>PrintWriter</code>, including the
* backtrace of the cause, if any.
*
* @param ps
* the <code>PrintWriter</code> to use for output
*/
public void printStackTrace(PrintWriter pw)
{
super.printStackTrace(pw);
if (getCause() != null)
{
getCause().printStackTrace(pw);
}
}
}
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