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/*----------------------------------------------------------------------------*/
/* */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved. */
/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved. */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the Common Public License v1.0 which accompanies this */
/* distribution. A copy is also available at the following address: */
/* http://www.ibm.com/developerworks/oss/CPLv1.0.htm */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in */
/* the documentation and/or other materials provided with the distribution. */
/* */
/* Neither the name of Rexx Language Association nor the names */
/* of its contributors may be used to endorse or promote products */
/* derived from this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS */
/* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED */
/* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */
/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY */
/* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* */
/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Kernel */
/* */
/* Primitive Rexx exception base class */
/* */
/******************************************************************************/
#include "RexxCore.h"
#include "ExceptionClass.hpp"
#include "ProtectedObject.hpp"
#include "DirectoryClass.hpp"
#include "StackFrameClass.hpp"
#include "SourceFile.hpp"
#include "PackageClass.hpp"
RexxClass *ExceptionClass::classInstance = OREF_NULL; // singleton class instance
/**
* Create initial bootstrap objects
*/
void ExceptionClass::createInstance()
{
CLASS_CREATE(Exception, "Exception", RexxClass);
}
/**
* Allocate a new Exception object
*
* @param size The size of the object.
*
* @return The newly allocated object.
*/
void *ExceptionClass::operator new(size_t size)
{
/* Get new object */
return new_object(size, T_Exception);
}
/**
* Constructor for an exception object.
*/
ExceptionClass::ExceptionClass()
{
type = OREF_NULL;
message = OREF_NULL;
cause = OREF_NULL;
stackFrames = OREF_NULL;
traceBack = OREF_NULL;
}
/**
* The Rexx accessible class NEW method.
*
* @param args The NEW args
* @param argc The count of arguments
*
* @return Never returns.
*/
RexxObject *ExceptionClass::newRexx(RexxObject **args, size_t argc)
{
// create a new weakReference
RexxObject *newObj = new ExceptionClass();
// override the behaviour in case this is a subclass
newObj->setBehaviour(((RexxClass *)this)->getInstanceBehaviour());
if (((RexxClass *)this)->hasUninitDefined())
{
newObj->hasUninit();
}
ProtectedObject p(newObj);
/* Initialize the new instance */
newObj->sendMessage(OREF_INIT, args, argc);
return newObj; /* return the new instance */
}
RexxObject *ExceptionClass::init(RexxString *t, RexxString *m, RexxString *d, RexxObject *a, ExceptionClass *c)
{
type = t;
if (type == OREF_NULL)
{
type = OREF_EXCEPTION;
}
message = m;
if (message == OREF_NULL)
{
message = OREF_NULLSTRING;
}
description = d;
if (description == OREF_NULL)
{
description = OREF_NULLSTRING;
}
additional = a;
if (additional == OREF_NULL)
{
additional = TheNilObject;
}
cause = c;
if (cause == OREF_NULL)
{
cause = (ExceptionClass *)TheNilObject;
}
fillInStackTrace();
return OREF_NULL;
}
void ExceptionClass::live(size_t liveMark)
/******************************************************************************/
/* Function: Normal garbage collection live marking */
/******************************************************************************/
{
memory_mark(this->type);
memory_mark(this->message);
memory_mark(this->description);
memory_mark(this->additional);
memory_mark(this->cause);
memory_mark(this->stackFrames);
memory_mark(this->traceBack);
memory_mark(this->condition);
memory_mark(this->objectVariables);
}
void ExceptionClass::liveGeneral(int reason)
/******************************************************************************/
/* Function: Generalized object marking */
/******************************************************************************/
{
memory_mark_general(this->type);
memory_mark_general(this->message);
memory_mark_general(this->description);
memory_mark_general(this->additional);
memory_mark_general(this->cause);
memory_mark_general(this->stackFrames);
memory_mark_general(this->traceBack);
memory_mark_general(this->condition);
memory_mark_general(this->objectVariables);
}
void ExceptionClass::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function: Flatten an object */
/******************************************************************************/
{
setUpFlatten(ExceptionClass)
flatten_reference(newThis->type, envelope);
flatten_reference(newThis->message, envelope);
flatten_reference(newThis->description, envelope);
flatten_reference(newThis->additional, envelope);
flatten_reference(newThis->cause, envelope);
flatten_reference(newThis->stackFrames, envelope);
flatten_reference(newThis->traceBack, envelope);
flatten_reference(newThis->condition, envelope);
flatten_reference(newThis->objectVariables, envelope);
cleanUpFlatten
}
/**
* Return the exception type name.
*
* @return The string name of the exception type.
*/
RexxString *ExceptionClass::getType()
{
return type;
}
/**
* Return the exception message
*
* @return The string message associated with the exception
*/
RexxString *ExceptionClass::getMessage()
{
return message;
}
/**
* Return the nested exception cause.
*
* @return The nested exception object.
*/
ExceptionClass *ExceptionClass::getCause()
{
return cause;
}
/**
* Return the stack frames tracing back from the exception
* creation
*
* @return A list of the stack frames.
*/
RexxList *ExceptionClass::getStackFrames()
{
return stackFrames;
}
/**
* Get the traceback lines associated with this exception.
*
* @return The list of Traceback location lines.
*/
RexxList *ExceptionClass::getTraceBack()
{
// if we've not generated this yet, do it now
if (traceBack == OREF_NULL)
{
traceBack = new_list();
for (size_t listIndex = stackFrames->firstIndex();
listIndex != LIST_END;
listIndex = stackFrames->nextIndex(listIndex) )
{
StackFrameClass *frame = (StackFrameClass *)stackFrames->getValue(listIndex);
traceBack->append(frame->getTraceLine());
}
}
return traceBack;
}
/**
* Fill in the stack trace information for the exception.
*/
RexxObject *ExceptionClass::fillInStackTrace()
{
stackFrames = ActivityManager::currentActivity->generateStackFrames();
traceBack = OREF_NULL;
return OREF_NULL;
}
/**
* Get a condition directory object from an exception.
* Primarily for compatibility with previous releases.
*
* @return A directory instance containing the exception information
* transformed into directory entries.
*/
RexxDirectory *ExceptionClass::getCondition()
{
if (condition == OREF_NULL)
{
condition = new_directory();
// the type is the condition type.
condition->put(type, OREF_CONDITION);
condition->put(message, OREF_NAME_MESSAGE);
condition->put(description, OREF_DESCRIPTION);
condition->put(additional, OREF_ADDITIONAL);
// add in the exception and traceback items
condition->put(stackFrames, OREF_STACKFRAMES);
condition->put(getTraceBack(), OREF_TRACEBACK);
StackFrameClass *frame = (StackFrameClass *)stackFrames->firstItem();
RexxObject *lineNumber = frame->getLine();
if (lineNumber != TheNilObject)
{
// add the line number information
condition->put(lineNumber, OREF_POSITION);
}
RexxSource *source = frame->getSourceObject();
// fill in the source information if we have it.
if (source != OREF_NULL)
{
condition->put(source->getProgramName(), OREF_PROGRAM);
condition->put(source->getPackage(), OREF_PACKAGE);
}
else
{
// if not available, then this is explicitly a NULLSTRINg.
condition->put(OREF_NULLSTRING, OREF_PROGRAM);
}
// fill in the propagation status
condition->put(TheFalseObject, OREF_PROPAGATED);
}
return condition;
}
/**
* Get the exception description information.
*
* @return The description string.
*/
RexxString *ExceptionClass::getDescription()
{
return description;
}
/**
* Get the exception additional information.
*
* @return The additional information
*/
RexxObject *ExceptionClass::getAdditional()
{
return additional;
}