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/*
* Dillo Widget
*
* Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "identity.hh"
#include <stdio.h>
namespace lout {
namespace identity {
// ------------------------
// IdentifiableObject
// ------------------------
using namespace object;
using namespace container::typed;
IdentifiableObject::Class::Class (IdentifiableObject::Class *parent, int id,
const char *className)
{
this->parent = parent;
this->id = id;
this->className = className;
}
void IdentifiableObject::Class::intoStringBuffer(misc::StringBuffer *sb)
{
sb->append ("<class ");
sb->append (className);
sb->append (" (");
sb->appendInt (id);
sb->append (")");
if (parent) {
sb->append (", parent: ");
parent->intoStringBuffer (sb);
}
sb->append (">");
}
HashTable <ConstString, IdentifiableObject::Class>
*IdentifiableObject::classesByName =
new HashTable<ConstString, IdentifiableObject::Class> (true, true);
Vector <IdentifiableObject::Class> *IdentifiableObject::classesById =
new Vector <IdentifiableObject::Class> (16, false);
IdentifiableObject::Class *IdentifiableObject::currentlyConstructedClass;
IdentifiableObject::IdentifiableObject ()
{
currentlyConstructedClass = NULL;
}
void IdentifiableObject::intoStringBuffer(misc::StringBuffer *sb)
{
sb->append("<instance ");
sb->appendPointer(this);
sb->append(" of ");
sb->append(getClassName());
sb->append(">");
}
/**
* \brief This method must be called in the constructor for the sub class.
* See class comment for details.
*/
void IdentifiableObject::registerName (const char *className, int *classId)
{
ConstString str (className);
Class *klass = classesByName->get (&str);
if (klass == NULL) {
klass = new Class (currentlyConstructedClass, classesById->size (),
className);
ConstString *key = new ConstString (className);
classesByName->put (key, klass);
classesById->put (klass);
*classId = klass->id;
}
this->classId = klass->id;
*classId = klass->id;
currentlyConstructedClass = klass;
}
/**
* \brief Returns, whether this class is an instance of the class, given by
* \em otherClassId, or of a sub class of this class.
*/
bool IdentifiableObject::instanceOf (int otherClassId)
{
if (otherClassId == -1)
// Other class has not been registered yet, while it should have been,
// if this class is an instance of it or of a sub-class.
return false;
Class *otherClass = classesById->get (otherClassId);
if (otherClass == NULL) {
fprintf (stderr,
"WARNING: Something got wrong here, it seems that a "
"CLASS_ID was not initialized properly.\n");
return false;
}
for (Class *klass = classesById->get (classId); klass != NULL;
klass = klass->parent) {
if (klass == otherClass)
return true;
}
return false;
}
} // namespace identity
} // namespace lout
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