org.python.core

Class PyException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

org.python.core.PyException

All Implemented Interfaces:

Serializable, Traverseproc

Direct Known Subclasses:

PyIndentationError, PySyntaxError

public class PyException
extends RuntimeException
implements Traverseproc

A wrapper for all python exception. Note that the wellknown python exception are not subclasses of PyException. Instead the python exception class is stored in the type field and value or class instance is stored in the value field.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
PyTraceback	traceback The exception traceback object.
PyObject	type The python exception class (for class exception) or identifier (for string exception).
PyObject	value The exception instance (for class exception) or exception value (for string exception).

Constructor Summary

Constructors

Constructor and Description
PyException()
PyException(PyObject type)
PyException(PyObject type, PyObject value)
PyException(PyObject type, PyObject value, PyTraceback traceback)
PyException(PyObject type, String value)

Method Summary

Methods

Modifier and Type	Method and Description
static PyException	doRaise(PyObject type, PyObject value, PyObject traceback) Logic for the raise statement
static String	exceptionClassName(PyObject obj) Get the name of the exception's class
Throwable	fillInStackTrace()
static boolean	isExceptionClass(PyObject obj) Determine whether obj is a Python exception class
static boolean	isExceptionInstance(PyObject obj) Determine whether obj is an Python exception instance
boolean	match(PyObject exc) Determine if this PyException is a match for exc.
void	normalize() Instantiates the exception value if it is not already an instance.
void	printStackTrace()
void	printStackTrace(PrintStream s)
boolean	refersDirectlyTo(PyObject ob) Optional operation.
void	super__printStackTrace(PrintWriter w)
String	toString()
void	tracebackHere(PyFrame here) Register frame as having been visited in the traceback.
void	tracebackHere(PyFrame here, boolean isFinally) Register frame as having been visited in the traceback.
int	traverse(Visitproc visit, Object arg) Traverses all reachable PyObjects.

Methods inherited from class java.lang.Throwable

addSuppressed, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, setStackTrace

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

type

public PyObject type

The python exception class (for class exception) or identifier (for string exception).

value

public PyObject value

The exception instance (for class exception) or exception value (for string exception).

traceback

public PyTraceback traceback

The exception traceback object.

Constructor Detail

PyException

public PyException()

PyException

public PyException(PyObject type)

PyException

public PyException(PyObject type,
           PyObject value)

PyException

public PyException(PyObject type,
           PyObject value,
           PyTraceback traceback)

PyException

public PyException(PyObject type,
           String value)

Method Detail

printStackTrace

public void printStackTrace()

Overrides:

printStackTrace in class Throwable

fillInStackTrace

public Throwable fillInStackTrace()

Overrides:

fillInStackTrace in class Throwable

printStackTrace

public void printStackTrace(PrintStream s)

Overrides:

printStackTrace in class Throwable

super__printStackTrace

public void super__printStackTrace(PrintWriter w)

toString

public String toString()

Overrides:

toString in class Throwable

normalize

public void normalize()

Instantiates the exception value if it is not already an instance.

tracebackHere

public void tracebackHere(PyFrame here)

Register frame as having been visited in the traceback.

Parameters:

here - the current PyFrame

tracebackHere

public void tracebackHere(PyFrame here,
                 boolean isFinally)

Register frame as having been visited in the traceback.

Parameters:

here - the current PyFrame

isFinally - whether caller is a Python finally block

doRaise

public static PyException doRaise(PyObject type,
                  PyObject value,
                  PyObject traceback)

Logic for the raise statement

Parameters:

type - the first arg to raise, a type or an instance

value - the second arg, the instance of the class or arguments to its constructor

traceback - a traceback object

Returns:

a PyException wrapper

match

public boolean match(PyObject exc)

Determine if this PyException is a match for exc.

Parameters:

exc - a PyObject exception type

Returns:

true if a match

isExceptionClass

public static boolean isExceptionClass(PyObject obj)

Determine whether obj is a Python exception class

Parameters:

obj - a PyObject

Returns:

true if an exception

isExceptionInstance

public static boolean isExceptionInstance(PyObject obj)

Determine whether obj is an Python exception instance

Parameters:

obj - a PyObject

Returns:

true if an exception instance

exceptionClassName

public static String exceptionClassName(PyObject obj)

Get the name of the exception's class

Parameters:

obj - a PyObject exception

Returns:

String exception name

traverse

public int traverse(Visitproc visit,
           Object arg)

Description copied from interface: Traverseproc

Traverses all reachable PyObjects. Like in CPython, arg must be passed unmodified to visit as its second parameter. If visit.visit returns nonzero, this return value must be returned immediately by traverse.

Specified by:

traverse in interface Traverseproc

refersDirectlyTo

public boolean refersDirectlyTo(PyObject ob)

Description copied from interface: Traverseproc

Optional operation. Should only be implemented if it is more efficient than calling traverse with a visitproc that just watches out for ob. Must return false if ob is null.

Specified by:

refersDirectlyTo in interface Traverseproc