Package org.logicalcobwebs.proxool

Class ProxoolException

  • All Implemented Interfaces:
    java.io.Serializable
    public class ProxoolException
extends java.lang.Exception
    Proxool exception class that emulates the behaviour of the new cause facility in jdk 1.4. It is also known as the chained exception facility, as the cause can, itself, have a cause, and so on, leading to a "chain" of exceptions, each caused by another.

    A cause can be associated with a throwable in two ways: via a constructor that takes the cause as an argument, or via the initCause(Throwable) method. New throwable classes that wish to allow causes to be associated with them should provide constructors that take a cause and delegate (perhaps indirectly) to one of the Throwable constructors that takes a cause.

    Since:
    Proxool 0.6
    Version:
    $Revision: 1.2 $, $Date: 2003/03/03 11:11:58 $
    Author:
    Christian Nedregaard (christian_nedregaard@email.com), $Author: billhorsman $ (current maintainer)
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      ProxoolException()
      Constructs a new instance with null as its detail message.
      ProxoolException​(java.lang.String message)
      Constructs a new instance with the specified detail message.
      ProxoolException​(java.lang.String message, java.lang.Throwable cause)
      Constructs a new instance with the specified detail message and cause.
      ProxoolException​(java.lang.Throwable cause)
      Constructs a new throwable with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause).

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Throwable getCause()
      Returns the cause of this exception or null if the cause is nonexistent or unknown.
      java.lang.Throwable initCause​(java.lang.Throwable cause)
      Initializes the cause of this exception to the specified value.
      void printStackTrace()
      Prints this ProxoolException and its backtrace to the standard error stream.
      void printStackTrace​(java.io.PrintStream stream)
      Prints this ProxoolException and its backtrace to the specified print stream.
      void printStackTrace​(java.io.PrintWriter writer)
      Prints this ProxoolException and its backtrace to the specified print writer.

      • Methods inherited from class java.lang.Throwable

        addSuppressed, fillInStackTrace, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, setStackTrace, toString

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • ProxoolException

        public ProxoolException()
        Constructs a new instance with null as its detail message. The cause is not initialized, and may subsequently be initialized by a call to initCause(java.lang.Throwable).

      • ProxoolException

        public ProxoolException​(java.lang.String message)
        Constructs a new instance with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to initCause(java.lang.Throwable).
        Parameters:
        message - the detail message. The detail message is saved for later retrieval by the Throwable.getMessage() method.

      • ProxoolException

        public ProxoolException​(java.lang.String message,
                        java.lang.Throwable cause)
        Constructs a new instance with the specified detail message and cause.

        Note that the detail message associated with cause is not automatically incorporated in this throwable's detail message.

        Parameters:
        message - the detail message (which is saved for later retrieval by the Throwable.getMessage() method).
        cause - the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

      • ProxoolException

        public ProxoolException​(java.lang.Throwable cause)
        Constructs a new throwable with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause). This constructor is useful for throwables that are little more than wrappers for other throwables.
        Parameters:
        cause - the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

    • Method Detail

      • getCause

        public java.lang.Throwable getCause()
        Returns the cause of this exception or null if the cause is nonexistent or unknown. (The cause is the throwable that caused this exception to get thrown.)

        This implementation returns the cause that was supplied via one of the constructors requiring a Throwable, or that was set after creation with the initCause(Throwable) method.

        Overrides:
        getCause in class java.lang.Throwable
        Returns:
        the cause of this throwable or null if the cause is nonexistent or unknown.

      • initCause

        public java.lang.Throwable initCause​(java.lang.Throwable cause)
        Initializes the cause of this exception to the specified value. (The cause is the throwable that caused this exception to get thrown.)

        This method can be called at most once. It is generally called from within the constructor, or immediately after creating the throwable. If this throwable was created with ProxoolException(Throwable) or ProxoolException(String,Throwable), this method cannot be called even once.

        Overrides:
        initCause in class java.lang.Throwable
        Parameters:
        cause - the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
        Returns:
        a reference to this ProxoolException instance.

      • printStackTrace

        public void printStackTrace()
        Prints this ProxoolException and its backtrace to the standard error stream. The backtrace for a ProxoolException with an initialized, non-null cause should generally include the backtrace for the cause.
        Overrides:
        printStackTrace in class java.lang.Throwable

      • printStackTrace

        public void printStackTrace​(java.io.PrintStream stream)
        Prints this ProxoolException and its backtrace to the specified print stream.
        Overrides:
        printStackTrace in class java.lang.Throwable
        Parameters:
        stream - PrintStream to use for output

      • printStackTrace

        public void printStackTrace​(java.io.PrintWriter writer)
        Prints this ProxoolException and its backtrace to the specified print writer.
        Overrides:
        printStackTrace in class java.lang.Throwable
        Parameters:
        writer - PrintWriter to use for output