405 lines
10 KiB
C++
405 lines
10 KiB
C++
// src/backend/serialize_visitor.cc - Copyright 2005, 2006, University
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// of Padova, dept. of Pure and Applied
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// Mathematics
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//
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// This file is part of SGPEMv2.
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//
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// This is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// SGPEMv2 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with SGPEMv2; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include "xml_serializer.hh"
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#include "xml_serializer_factory.hh"
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#include "xml_visitor.hh"
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#include "backend/environment.hh"
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#include "backend/history.hh"
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#include "backend/process.hh"
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#include "backend/serializer_error.hh"
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#include "backend/string_utils.hh"
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using namespace sgpem;
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XMLSerializer::~XMLSerializer()
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{
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}
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XMLSerializer::XMLSerializer()
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{
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}
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void XMLSerializer::save_snapshot(const Glib::ustring& filename, const History& hist)
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{
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/* COMPAT: Do not genrate nodes for formatting spaces */
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LIBXML_TEST_VERSION
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xmlKeepBlanksDefault(0);
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xmlDocPtr doc;
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doc = xmlNewDoc((const xmlChar *)"1.0");
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if(doc!=NULL){
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fill_doc(doc, hist);
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int nwritten = xmlSaveFormatFile (filename.c_str(), doc, 1);
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if(nwritten<0)
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{
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throw SerializerError("Error writing xml doc to output stream.");
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}
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}
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else
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{
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throw SerializerError("Internal Error creating xml doc.");
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}
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/* Clean up everything else before quitting. */
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xmlCleanupParser();
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}
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void XMLSerializer::restore_snapshot(const Glib::ustring& filename, History& hist)
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{
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// TODO - all to do!!
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// DEBUG - remove me when finished
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#ifdef LIBXML_SAX1_ENABLED
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xmlDocPtr doc;
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LIBXML_TEST_VERSION
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xmlKeepBlanksDefault(0);
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/*
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* build an XML tree from a the file;
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*/
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doc = xmlParseFile(filename.c_str());
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if (doc == NULL) {
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xmlCleanupParser();
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throw SerializerError("Parsing Error: doc is invalid.");
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}
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clear_history(hist);
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XMLSerializerFactory fact(hist);
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// read all elements and fill hist
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read_doc(doc, fact);
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// frees all xml related data
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xmlFreeDoc(doc);
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/* Clean up everything else before quitting. */
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xmlCleanupParser();
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#else
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/*
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* the library has been compiled without some of the old interfaces
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*/
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throw SerializerError("ERROR: Compilation with SAX1 must be enabled! (?)");
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#endif /* LIBXML_SAX1_ENABLED */
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}
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const Glib::ustring XMLSerializer::get_filename_extension()
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{
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return Glib::ustring("xsgp");
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}
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const Glib::ustring XMLSerializer::get_filename_description()
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{
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return Glib::ustring("SGPEMv2 XML savefile");
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}
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void XMLSerializer::fill_doc(xmlDocPtr doc, const History& hist)
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{
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xmlNodePtr root_node = NULL;/* node pointers */
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/*
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* Creates a new document, a node and set it as a root node
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*/
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root_node = xmlNewNode(NULL, (const xmlChar *) "sgpem");
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xmlDocSetRootElement(doc, root_node);
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/*
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* Creates a DTD declaration. Isn't mandatory.
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*/
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xmlDtdPtr dtd = xmlCreateIntSubset(doc, (const xmlChar *) "sgpem", NULL, (const xmlChar *) "sgpem.dtd");
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XMLVisitor xvisit(root_node);
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xvisit.from_history(hist);
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/*
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//
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// xmlNewChild() creates a new node, which is "attached" as child node
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// of root_node node.
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//
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xmlNodePtr resources_node = xmlNewChild(root_node, NULL, (const xmlChar *) "resources", NULL);
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//
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// The same as above, but the new child node doesn't have a content
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//
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xmlNodePtr schedulables_node = xmlNewChild(root_node, NULL, (const xmlChar *) "schedulables", NULL);
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fill_resources(resources_node, hist);
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fill_schedulables(schedulables_node, hist);
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*/
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}
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/*
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void XMLSerializer::fill_resources(xmlNodePtr resources_node, const History& hist)
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{
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const Environment& env = hist.get_last_environment();
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const Environment::Resources& rvect = env.get_resources();
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typedef Environment::Resources::const_iterator res_iterator;
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res_iterator iter = rvect.begin();
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res_iterator end = rvect.end();
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while(iter!=end)
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{
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XMLVisitor xvisit(resources_node);
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Glib::ustring key;
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int_to_string((int)(*iter).first, key);
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xvisit.from_resource(*((*iter).second), key);
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iter++;
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}
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}
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void XMLSerializer::fill_schedulables(xmlNodePtr schedulables_node, const History& hist)
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{
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const Environment& env = hist.get_last_environment();
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const Environment::Processes& pvect = env.get_processes();
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typedef std::vector<Process*>::const_iterator proc_iterator;
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proc_iterator iter = pvect.begin();
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proc_iterator end = pvect.end();
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while(iter!=end)
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{
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XMLVisitor xvisit(schedulables_node);
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xvisit.from_process(*(*iter));
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iter++;
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}
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}
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*/
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void XMLSerializer::clear_history(History& hist)
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{
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const Environment& env = hist.get_last_environment();
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const Environment::Processes& pvect = env.get_processes();
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typedef std::vector<Process*>::const_iterator proc_iterator;
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proc_iterator iter = pvect.begin();
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while(iter!=pvect.end())
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{
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hist.remove(*(*iter));
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iter = pvect.begin();
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}
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const Environment::Resources& rvect = env.get_resources();
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typedef Environment::Resources::const_iterator res_iterator;
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res_iterator riter = rvect.begin();
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while(riter!=rvect.end())
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{
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hist.remove((*riter).first);
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riter = rvect.begin();
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}
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}
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void XMLSerializer::read_doc(xmlDocPtr doc, XMLSerializerFactory& fact)
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{
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/*
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* Check the document is of the right kind
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*/
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xmlNodePtr root;
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root = xmlDocGetRootElement(doc);
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if (root == NULL) {
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xmlFreeDoc(doc);
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xmlCleanupParser();
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throw SerializerError("Reading Error: xml doc is empty.");
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}
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xmlNodePtr cur;
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cur = root->children;
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while(cur!=NULL)
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{
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Glib::ustring name((const char *)cur->name);
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if(name=="resources")
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{
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read_resources(cur, fact);
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}
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if(name=="schedulables")
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{
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read_schedulables(cur, fact);
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}
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cur = cur->next;
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}
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}
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XMLSerializerFactory::Parameters* read_properties(xmlAttrPtr prop)
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{
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if(prop==NULL)
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return NULL;
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XMLSerializerFactory::Parameters* par=new XMLSerializerFactory::Parameters();
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while (prop != NULL) {
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if(prop->children && xmlNodeIsText(prop->children)){
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xmlChar *key = xmlNodeGetContent (prop->children);
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// xmlChar *key = xmlNodeListGetString(doc, prop->children, 1);
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if(key!=NULL)
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{
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std::pair<Glib::ustring, Glib::ustring> key_value(Glib::ustring((const char *)prop->name), Glib::ustring((const char *)key));
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par->insert(key_value);
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xmlFree(key);
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}
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}
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prop = prop->next;
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}
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return par;
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}
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void XMLSerializer::read_resources(xmlNodePtr resources_node, XMLSerializerFactory& fact)
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{
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xmlNodePtr cur;
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cur = resources_node->children;
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while(cur!=NULL)
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{
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Glib::ustring node_name((const char *)cur->name);
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if(node_name=="resource")
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{
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xmlAttrPtr prop = cur->properties;
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XMLSerializerFactory::Parameters* par=read_properties(prop);
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if(par!=NULL)
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{
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fact.factory_method(Glib::ustring("Resource"), *par);
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}
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// fact.create_resource(*par);
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}
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cur = cur->next;
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}
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}
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void XMLSerializer::read_schedulables(xmlNodePtr schedulables_node, XMLSerializerFactory& fact)
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{
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if(schedulables_node==NULL)
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return;
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xmlNodePtr cur;
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cur = schedulables_node->children;
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while(cur!=NULL)
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{
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Glib::ustring node_name((const char *)cur->name);
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if(node_name=="process")
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{
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xmlAttrPtr prop = cur->properties;
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XMLSerializerFactory::Parameters* par=read_properties(prop);
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if(par!=NULL)
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{
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fact.factory_method(Glib::ustring("Process"), *par);
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}
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// pass the "threads node"
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read_threads(cur->children, fact);
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}
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cur = cur->next;
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}
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}
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void XMLSerializer::read_threads(xmlNodePtr threads_node, XMLSerializerFactory& fact)
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{
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if(threads_node==NULL)
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return;
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xmlNodePtr cur;
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cur = threads_node->children;
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while(cur!=NULL)
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{
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Glib::ustring node_name((const char *)cur->name);
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if(node_name=="thread")
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{
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xmlAttrPtr prop = cur->properties;
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XMLSerializerFactory::Parameters* par=read_properties(prop);
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if(par!=NULL)
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{
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fact.factory_method(Glib::ustring("Thread"), *par);
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}
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// pass the "requests node"
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read_requests(cur->children, fact);
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}
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cur = cur->next;
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}
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}
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void XMLSerializer::read_requests(xmlNodePtr requests_node, XMLSerializerFactory& fact)
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{
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if(requests_node==NULL)
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{
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return;
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}
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xmlNodePtr cur;
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cur = requests_node->children;
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while(cur!=NULL)
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{
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Glib::ustring node_name((const char *)cur->name);
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if(node_name=="request")
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{
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xmlAttrPtr prop = cur->properties;
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XMLSerializerFactory::Parameters* par=read_properties(prop);
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if(par!=NULL)
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{
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fact.factory_method(Glib::ustring("Request"), *par);
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}
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// pass the "subrequest nodes"
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read_subrequests(cur->children, fact);
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}
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cur = cur->next;
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}
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}
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void XMLSerializer::read_subrequests(xmlNodePtr subrequest_node, XMLSerializerFactory& fact)
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{
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if(subrequest_node==NULL)
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{
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return;
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}
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xmlNodePtr cur;
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cur = subrequest_node;
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while(cur!=NULL)
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{
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Glib::ustring node_name((const char *)cur->name);
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if(node_name=="subrequest")
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{
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xmlAttrPtr prop = cur->properties;
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XMLSerializerFactory::Parameters* par=read_properties(prop);
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if(par!=NULL)
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{
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fact.factory_method(Glib::ustring("SubRequest"), *par);
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}
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}
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cur = cur->next;
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}
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}
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/* comment */
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