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initial version ( megaglest 3.2.3-beta3 )
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Titus Tscharntke
394
source/shared_lib/sources/xml/xml_parser.cpp
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394
source/shared_lib/sources/xml/xml_parser.cpp
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// ==============================================================
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// This file is part of Glest Shared Library (www.glest.org)
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//
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// Copyright (C) 2001-2008 Marti<74>o Figueroa
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//
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// You can redistribute this code and/or modify it under
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// the terms of the GNU General Public License as published
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// by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version
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// ==============================================================
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#include "xml_parser.h"
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#include <fstream>
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#include <stdexcept>
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#include "conversion.h"
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#include <xercesc/dom/DOM.hpp>
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#include <xercesc/util/PlatformUtils.hpp>
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#include <xercesc/framework/LocalFileFormatTarget.hpp>
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#include "leak_dumper.h"
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XERCES_CPP_NAMESPACE_USE
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using namespace std;
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namespace Shared{ namespace Xml{
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using namespace Util;
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// =====================================================
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// class ErrorHandler
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// =====================================================
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class ErrorHandler: public DOMErrorHandler{
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public:
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virtual bool handleError (const DOMError &domError){
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if(domError.getSeverity()== DOMError::DOM_SEVERITY_FATAL_ERROR){
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char msgStr[strSize], fileStr[strSize];
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XMLString::transcode(domError.getMessage(), msgStr, strSize-1);
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XMLString::transcode(domError.getLocation()->getURI(), fileStr, strSize-1);
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int lineNumber= domError.getLocation()->getLineNumber();
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throw runtime_error("Error parsing XML, file: " + string(fileStr) + ", line: " + intToStr(lineNumber) + ": " + string(msgStr));
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}
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return true;
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}
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};
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// =====================================================
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// class XmlIo
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// =====================================================
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bool XmlIo::initialized= false;
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XmlIo::XmlIo(){
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try{
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XMLPlatformUtils::Initialize();
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}
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catch(const XMLException&){
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throw runtime_error("Error initializing XML system");
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}
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try{
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XMLCh str[strSize];
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XMLString::transcode("LS", str, strSize-1);
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implementation = DOMImplementationRegistry::getDOMImplementation(str);
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}
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catch(const DOMException){
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throw runtime_error("Exception while creating XML parser");
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}
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}
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XmlIo &XmlIo::getInstance(){
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static XmlIo XmlIo;
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return XmlIo;
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}
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XmlIo::~XmlIo(){
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XMLPlatformUtils::Terminate();
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}
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XmlNode *XmlIo::load(const string &path){
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try{
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ErrorHandler errorHandler;
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#if XERCES_VERSION_MAJOR < 3
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DOMBuilder *parser= (static_cast<DOMImplementationLS*>(implementation))->createDOMBuilder(DOMImplementationLS::MODE_SYNCHRONOUS, 0);
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parser->setErrorHandler(&errorHandler);
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parser->setFeature(XMLUni::fgXercesSchemaFullChecking, true);
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parser->setFeature(XMLUni::fgDOMValidation, true);
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#else
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DOMLSParser *parser = (static_cast<DOMImplementationLS*>(implementation))->createLSParser(DOMImplementationLS::MODE_SYNCHRONOUS, 0);
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DOMConfiguration *config = parser->getDomConfig();
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config->setParameter(XMLUni::fgXercesSchemaFullChecking, true);
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config->setParameter(XMLUni::fgDOMValidate, true);
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#endif
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DOMDocument *document= parser->parseURI(path.c_str());
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if(document==NULL){
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throw runtime_error("Can not parse URL: " + path);
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}
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XmlNode *rootNode= new XmlNode(document->getDocumentElement());
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parser->release();
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return rootNode;
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}
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catch(const DOMException &e){
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throw runtime_error("Exception while loading: " + path + ": " + XMLString::transcode(e.msg));
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}
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}
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void XmlIo::save(const string &path, const XmlNode *node){
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try{
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XMLCh str[strSize];
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XMLString::transcode(node->getName().c_str(), str, strSize-1);
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DOMDocument *document= implementation->createDocument(0, str, 0);
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DOMElement *documentElement= document->getDocumentElement();
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for(int i=0; i<node->getChildCount(); ++i){
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documentElement->appendChild(node->getChild(i)->buildElement(document));
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}
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LocalFileFormatTarget file(path.c_str());
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#if XERCES_VERSION_MAJOR < 3
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DOMWriter* writer = implementation->createDOMWriter();
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writer->setFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true);
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writer->writeNode(&file, *document);
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#else
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DOMLSSerializer *serializer = implementation->createLSSerializer();
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DOMLSOutput* output=implementation->createLSOutput();
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DOMConfiguration* config=serializer->getDomConfig();
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config->setParameter(XMLUni::fgDOMWRTFormatPrettyPrint,true);
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output->setByteStream(&file);
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serializer->write(document,output);
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output->release();
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serializer->release();
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#endif
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document->release();
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}
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catch(const DOMException &e){
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throw runtime_error("Exception while saving: " + path + ": " + XMLString::transcode(e.msg));
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}
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}
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// =====================================================
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// class XmlTree
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// =====================================================
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XmlTree::XmlTree(){
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rootNode= NULL;
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}
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void XmlTree::init(const string &name){
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this->rootNode= new XmlNode(name);
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}
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void XmlTree::load(const string &path){
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this->rootNode= XmlIo::getInstance().load(path);
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}
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void XmlTree::save(const string &path){
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XmlIo::getInstance().save(path, rootNode);
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}
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XmlTree::~XmlTree(){
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delete rootNode;
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}
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// =====================================================
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// class XmlNode
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// =====================================================
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XmlNode::XmlNode(DOMNode *node){
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//get name
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char str[strSize];
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XMLString::transcode(node->getNodeName(), str, strSize-1);
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name= str;
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//check document
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if(node->getNodeType()==DOMNode::DOCUMENT_NODE){
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name="document";
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}
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//check children
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for(int i=0; i<node->getChildNodes()->getLength(); ++i){
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DOMNode *currentNode= node->getChildNodes()->item(i);
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if(currentNode->getNodeType()==DOMNode::ELEMENT_NODE){
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XmlNode *xmlNode= new XmlNode(currentNode);
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children.push_back(xmlNode);
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}
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}
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//check attributes
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DOMNamedNodeMap *domAttributes= node->getAttributes();
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if(domAttributes!=NULL){
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for(int i=0; i<domAttributes->getLength(); ++i){
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DOMNode *currentNode= domAttributes->item(i);
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if(currentNode->getNodeType()==DOMNode::ATTRIBUTE_NODE){
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XmlAttribute *xmlAttribute= new XmlAttribute(domAttributes->item(i));
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attributes.push_back(xmlAttribute);
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}
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}
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}
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//get value
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if(node->getNodeType()==DOMNode::ELEMENT_NODE && children.size()==0){
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char *textStr= XMLString::transcode(node->getTextContent());
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text= textStr;
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XMLString::release(&textStr);
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}
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}
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XmlNode::XmlNode(const string &name){
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this->name= name;
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}
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XmlNode::~XmlNode(){
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for(int i=0; i<children.size(); ++i){
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delete children[i];
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}
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for(int i=0; i<attributes.size(); ++i){
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delete attributes[i];
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}
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}
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XmlAttribute *XmlNode::getAttribute(int i) const{
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if(i>=attributes.size()){
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throw runtime_error(getName()+" node doesn't have "+intToStr(i)+" attributes");
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}
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return attributes[i];
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}
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XmlAttribute *XmlNode::getAttribute(const string &name) const{
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for(int i=0; i<attributes.size(); ++i){
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if(attributes[i]->getName()==name){
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return attributes[i];
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}
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}
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throw runtime_error("\"" + getName() + "\" node doesn't have a attribute named \"" + name + "\"");
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}
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XmlNode *XmlNode::getChild(int i) const {
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if(i>=children.size())
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throw runtime_error("\"" + getName()+"\" node doesn't have "+intToStr(i+1)+" children");
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return children[i];
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}
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XmlNode *XmlNode::getChild(const string &childName, int i) const{
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if(i>=children.size()){
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throw runtime_error("\"" + name + "\" node doesn't have "+intToStr(i+1)+" children named \"" + childName + "\"\n\nTree: "+getTreeString());
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}
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int count= 0;
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for(int j=0; j<children.size(); ++j){
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if(children[j]->getName()==childName){
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if(count==i){
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return children[j];
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}
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count++;
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}
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}
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throw runtime_error("Node \""+getName()+"\" doesn't have "+intToStr(i+1)+" children named \""+childName+"\"\n\nTree: "+getTreeString());
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}
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XmlNode *XmlNode::addChild(const string &name){
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XmlNode *node= new XmlNode(name);
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children.push_back(node);
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return node;
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}
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XmlAttribute *XmlNode::addAttribute(const string &name, const string &value){
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XmlAttribute *attr= new XmlAttribute(name, value);
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attributes.push_back(attr);
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return attr;
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}
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DOMElement *XmlNode::buildElement(DOMDocument *document) const{
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XMLCh str[strSize];
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XMLString::transcode(name.c_str(), str, strSize-1);
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DOMElement *node= document->createElement(str);
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for(int i=0; i<attributes.size(); ++i){
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XMLString::transcode(attributes[i]->getName().c_str(), str, strSize-1);
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DOMAttr *attr= document->createAttribute(str);
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XMLString::transcode(attributes[i]->getValue().c_str(), str, strSize-1);
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attr->setValue(str);
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node->setAttributeNode(attr);
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}
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for(int i=0; i<children.size(); ++i){
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node->appendChild(children[i]->buildElement(document));
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}
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return node;
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}
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string XmlNode::getTreeString() const{
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string str;
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str+= getName();
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if(!children.empty()){
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str+= " (";
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for(int i=0; i<children.size(); ++i){
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str+= children[i]->getTreeString();
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str+= " ";
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}
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str+=") ";
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}
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return str;
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}
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// =====================================================
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// class XmlAttribute
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// =====================================================
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XmlAttribute::XmlAttribute(DOMNode *attribute){
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char str[strSize];
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XMLString::transcode(attribute->getNodeValue(), str, strSize-1);
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value= str;
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XMLString::transcode(attribute->getNodeName(), str, strSize-1);
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name= str;
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}
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XmlAttribute::XmlAttribute(const string &name, const string &value){
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this->name= name;
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this->value= value;
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}
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bool XmlAttribute::getBoolValue() const{
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if(value=="true"){
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return true;
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}
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else if(value=="false"){
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return false;
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}
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else{
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throw runtime_error("Not a valid bool value (true or false): " +getName()+": "+ value);
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}
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}
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int XmlAttribute::getIntValue() const{
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return strToInt(value);
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}
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int XmlAttribute::getIntValue(int min, int max) const{
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int i= strToInt(value);
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if(i<min || i>max){
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throw runtime_error("Xml Attribute int out of range: " + getName() + ": " + value);
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}
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return i;
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}
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float XmlAttribute::getFloatValue() const{
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return strToFloat(value);
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}
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float XmlAttribute::getFloatValue(float min, float max) const{
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float f= strToFloat(value);
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if(f<min || f>max){
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throw runtime_error("Xml attribute float out of range: " + getName() + ": " + value);
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}
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return f;
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}
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const string &XmlAttribute::getRestrictedValue() const
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{
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const string allowedCharacters = "abcdefghijklmnopqrstuvwxyz1234567890._-/";
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for(int i= 0; i<value.size(); ++i){
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if(allowedCharacters.find(value[i])==string::npos){
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throw runtime_error(
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string("The string \"" + value + "\" contains a character that is not allowed: \"") + value[i] +
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"\"\nFor portability reasons the only allowed characters in this field are: " + allowedCharacters);
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}
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}
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return value;
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}
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}}//end namespace
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