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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.oorexx.org/license.html */
/* */
/* 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 ClassDirective.cpp */
/* */
/* Primitive Translator Abstract Directive Code */
/* */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "ClassDirective.hpp"
#include "Clause.hpp"
#include "DirectoryClass.hpp"
#include "TableClass.hpp"
#include "ListClass.hpp"
#include "RexxActivation.hpp"
/**
* Construct a ClassDirective.
*
* @param n The name of the requires target.
* @param p The public name of the requires target.
* @param clause The source file clause containing the directive.
*/
ClassDirective::ClassDirective(RexxString *n, RexxString *p, RexxClause *clause) : RexxDirective(clause, KEYWORD_CLASS)
{
idName = n;
publicName = p;
}
/**
* Normal garbage collecting live mark.
*
* @param liveMark The current live object mark.
*/
void ClassDirective::live(size_t liveMark)
{
memory_mark(this->nextInstruction); // must be first one marked (though normally null)
memory_mark(this->publicName);
memory_mark(this->idName);
memory_mark(this->metaclassName);
memory_mark(this->subclassName);
memory_mark(this->inheritsClasses);
memory_mark(this->instanceMethods);
memory_mark(this->classMethods);
memory_mark(this->dependencies);
}
/**
* The generalized object marking routine.
*
* @param reason The processing faze we're running the mark on.
*/
void ClassDirective::liveGeneral(int reason)
{
memory_mark_general(this->nextInstruction); // must be first one marked (though normally null)
memory_mark_general(this->publicName);
memory_mark_general(this->idName);
memory_mark_general(this->metaclassName);
memory_mark_general(this->subclassName);
memory_mark_general(this->inheritsClasses);
memory_mark_general(this->instanceMethods);
memory_mark_general(this->classMethods);
memory_mark_general(this->dependencies);
}
/**
* Flatten the directive instance.
*
* @param envelope The envelope we're flattening into.
*/
void ClassDirective::flatten(RexxEnvelope *envelope)
{
setUpFlatten(ClassDirective)
flatten_reference(newThis->nextInstruction, envelope);
flatten_reference(newThis->publicName, envelope);
flatten_reference(newThis->idName, envelope);
flatten_reference(newThis->metaclassName, envelope);
flatten_reference(newThis->subclassName, envelope);
flatten_reference(newThis->inheritsClasses, envelope);
flatten_reference(newThis->instanceMethods, envelope);
flatten_reference(newThis->classMethods, envelope);
// by this time, we should be finished with this, and it should
// already be null. Make sure this is the case.
newThis->dependencies = OREF_NULL;
cleanUpFlatten
}
/**
* Allocate a new requires directive.
*
* @param size The size of the object.
*
* @return The memory for the new object.
*/
void *ClassDirective::operator new(size_t size)
{
return new_object(size, T_ClassDirective); /* Get new object */
}
/**
* Do install-time processing of the ::requires directive. This
* will resolve the directive and merge all of the public information
* from the resolved file into this program context.
*
* @param activation The activation we're running under for the install.
*/
RexxClass *ClassDirective::install(RexxSource *source, RexxActivation *activation)
{
RexxClass *metaclass = OREF_NULL;
RexxClass *subclass = TheObjectClass;
// make this the current line for the error context
activation->setCurrent(this);
if (metaclassName != OREF_NULL)
{
/* resolve the class */
metaclass = source->findClass(metaclassName);
if (metaclass == OREF_NULL) /* nothing found? */
{
/* not found in environment, error! */
reportException(Error_Execution_nometaclass, metaclassName);
}
}
if (subclassName != OREF_NULL) /* no subclass? */
{
/* resolve the class */
subclass = source->findClass(subclassName);
if (subclass == OREF_NULL) /* nothing found? */
{
/* not found in environment, error! */
reportException(Error_Execution_noclass, subclassName);
}
}
RexxClass *classObject; // the class object we're creating
// create the class object using the appropriate mechanism
if (mixinClass)
{
classObject = subclass->mixinclass(idName, metaclass, classMethods);
}
else
{
/* doing a subclassing */
classObject = subclass->subclass(idName, metaclass, classMethods);
}
/* add the class to the directory */
source->addInstalledClass(publicName, classObject, publicClass);
if (inheritsClasses != OREF_NULL) /* have inherits to process? */
{
// now handle the multiple inheritance issues
for (size_t i = inheritsClasses->firstIndex(); i != LIST_END; i = inheritsClasses->nextIndex(i))
{
/* get the next inherits name */
RexxString *inheritsName = (RexxString *)inheritsClasses->getValue(i);
/* go resolve the entry */
RexxClass *mixin = source->findClass(inheritsName);
if (mixin == OREF_NULL) /* not found? */
{
/* not found in environment, error! */
reportException(Error_Execution_noclass, inheritsName);
}
/* do the actual inheritance */
classObject->sendMessage(OREF_INHERIT, mixin);
}
}
if (instanceMethods != OREF_NULL) /* have instance methods to add? */
{
/* define them to the class object */
classObject->defineMethods(instanceMethods);
}
// the source needs this at the end so it call call the activate methods
return classObject;
}
/**
* Check if a dependency this class has is based off of a
* class co-located in the same class package.
*
* @param name The class name.
* @param class_directives
* The global local classes list.
*/
void ClassDirective::checkDependency(RexxString *name, RexxDirectory *class_directives)
{
if (name != OREF_NULL)
{
// if this is in install? */
if (class_directives->entry(name) != OREF_NULL)
{
if (dependencies == OREF_NULL)
{
OrefSet(this, this->dependencies, new_directory());
}
/* add to our pending list */
dependencies->setEntry(name, name);
}
}
}
/**
* Check our class dependencies against the locally defined class
* list to develop a cross dependency list.
*
* @param class_directives
* The global set of defined classes in this package.
*/
void ClassDirective::addDependencies(RexxDirectory *class_directives)
{
// now for each of our dependent classes, if this is defined locally, we
// an entry to our dependency list to aid the class ordering
checkDependency(metaclassName, class_directives);
checkDependency(subclassName, class_directives);
// process each inherits item the same way
if (inheritsClasses != OREF_NULL)
{
for (size_t i = inheritsClasses->firstIndex(); i != LIST_END; i = inheritsClasses->nextIndex(i))
{
/* get the next inherits name */
RexxString *inheritsName = (RexxString *)inheritsClasses->getValue(i);
checkDependency(inheritsName, class_directives);
}
}
}
/**
* Check if this class has any additional in-package dependencies.
*
* @return true if all in-package dependencies have been resolved already.
*/
bool ClassDirective::dependenciesResolved()
{
return dependencies == OREF_NULL;
}
/**
* Remove a class from the dependency list.
*
* @param name The name of the class that's next in the ordering.
*/
void ClassDirective::removeDependency(RexxString *name)
{
// if we have a dependency list, remove this name from the
// list. If this is our last dependency item, we can junk
// the list entirely.
if (dependencies != OREF_NULL)
{
dependencies->remove(name);
if (dependencies->items() == 0)
{
OrefSet(this, this->dependencies, OREF_NULL);
}
}
}
/**
* Add an inherits class to the class definition.
*
* @param name The name of the inherited class.
*/
void ClassDirective::addInherits(RexxString *name)
{
if (inheritsClasses == OREF_NULL)
{
OrefSet(this, this->inheritsClasses, new_list());
}
inheritsClasses->append(name);
}
/**
* Retrieve the class methods directory for this class.
*
* @return The class methods directory.
*/
RexxTable *ClassDirective::getClassMethods()
{
if (classMethods == OREF_NULL)
{
OrefSet(this, this->classMethods, new_table());
}
return classMethods;
}
/**
* Retrieve the instance methods directory for this class.
*
* @return The instance methods directory.
*/
RexxTable *ClassDirective::getInstanceMethods()
{
if (instanceMethods == OREF_NULL)
{
OrefSet(this, this->instanceMethods, new_table());
}
return instanceMethods;
}
/**
* Check for a duplicate method defined om this class.
*
* @param name The method name.
* @param classMethod
* Indicates whether we are checking for a class or instance method.
*
* @return true if this is a duplicate of the method type.
*/
bool ClassDirective::checkDuplicateMethod(RexxString *name, bool classMethod)
{
if (classMethod)
{
return getClassMethods()->get(name) != OREF_NULL;
}
else
{
return getInstanceMethods()->get(name) != OREF_NULL;
}
}
/**
* Add a method to a class definition.
*
* @param name The name to add.
* @param method The method object that maps to this name.
* @param classMethod
* Indicates whether this is a new class or instance method.
*/
void ClassDirective::addMethod(RexxString *name, RexxMethod *method, bool classMethod)
{
if (classMethod)
{
getClassMethods()->put(method, name);
}
else
{
getInstanceMethods()->put(method, name);
}
}
/**
* Add a method to a class definition.
*
* @param name The name to add.
* @param method The method object that maps to this name.
*/
void ClassDirective::addConstantMethod(RexxString *name, RexxMethod *method)
{
// this gets added as both a class and instance method
addMethod(name, method, false);
addMethod(name, method, true);
}