summaryrefslogtreecommitdiffstats
path: root/src/uscxml/Interpreter.cpp
blob: 1e8c9319ed05adb863af201062ea34abc90497e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
/**
 *  @file
 *  @author     2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
 *  @copyright  Simplified BSD
 *
 *  @cond
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the FreeBSD license as published by the FreeBSD
 *  project.
 *
 *  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.
 *
 *  You should have received a copy of the FreeBSD license along with this
 *  program. If not, see <http://www.opensource.org/licenses/bsd-license>.
 *  @endcond
 */

#include "uscxml/config.h"
#include "uscxml/Common.h"
#include "uscxml/Interpreter.h"
#include "uscxml/interpreter/InterpreterImpl.h"
#include "uscxml/util/DOM.h"
#include "uscxml/util/URL.h"

#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/framework/MemBufInputSource.hpp>
#include <xercesc/dom/DOM.hpp>
#include <xercesc/sax/HandlerBase.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/PlatformUtils.hpp>
#include "easylogging++.h"

#include <iostream>
#include <boost/algorithm/string.hpp>

#include <assert.h>
#include <algorithm>
#include <memory>
#include <mutex>

#include "easylogging++.h"
INITIALIZE_EASYLOGGINGPP

#define VERBOSE 0

namespace uscxml {

// msxml.h defines all the DOM types as well
//using namespace XERCESC_NS;

static URL normalizeURL(const std::string url) {
	URL absUrl(url);

	// this is required for _baseURL to be considered absolute!
	if (absUrl.scheme() == "" || !absUrl.isAbsolute()) {
		absUrl = URL::resolveWithCWD(absUrl);
	}
	if (absUrl.scheme() == "") {
		absUrl = URL("file://" + url);
	}
	return absUrl;
}

Interpreter Interpreter::fromXML(const std::string& xml, const std::string& baseURL) {
	URL absUrl = normalizeURL(baseURL);

	std::shared_ptr<InterpreterImpl> interpreterImpl(new InterpreterImpl());
	Interpreter interpreter(interpreterImpl);

	std::unique_ptr<XERCESC_NS::XercesDOMParser> parser(new XERCESC_NS::XercesDOMParser());
	std::unique_ptr<XERCESC_NS::ErrorHandler> errHandler(new XERCESC_NS::HandlerBase());

	try {
		parser->setValidationScheme(XERCESC_NS::XercesDOMParser::Val_Always);
		parser->setDoNamespaces(true);
		parser->useScanner(XERCESC_NS::XMLUni::fgWFXMLScanner);

		parser->setErrorHandler(errHandler.get());

		XERCESC_NS::MemBufInputSource is((XMLByte*)xml.c_str(), xml.size(), X("fake"));
		parser->parse(is);

		interpreterImpl->_document = parser->adoptDocument();
		interpreterImpl->_baseURL = absUrl;
		InterpreterImpl::addInstance(interpreterImpl);

	} catch (const XERCESC_NS::SAXParseException& toCatch) {
		ERROR_PLATFORM_THROW(X(toCatch.getMessage()).str());
	} catch (const XERCESC_NS::RuntimeException& toCatch) {
		ERROR_PLATFORM_THROW(X(toCatch.getMessage()).str());
	} catch (const XERCESC_NS::XMLException& toCatch) {
		ERROR_PLATFORM_THROW(X(toCatch.getMessage()).str());
	} catch (const XERCESC_NS::DOMException& toCatch) {
		ERROR_PLATFORM_THROW(X(toCatch.getMessage()).str());
	}

	return interpreter;
}

Interpreter Interpreter::fromElement(XERCESC_NS::DOMElement* scxml, const std::string& baseURL) {
	URL absUrl = normalizeURL(baseURL);

	std::shared_ptr<InterpreterImpl> interpreterImpl(new InterpreterImpl());
	Interpreter interpreter(interpreterImpl);

	// *copy* the given XERCESC_NS::DOM to get rid of event listeners
	XERCESC_NS::DOMImplementation* implementation = XERCESC_NS::DOMImplementationRegistry::getDOMImplementation(X("core"));
	interpreterImpl->_document = implementation->createDocument();

	// we need to import the parent - to support xpath test150
	XERCESC_NS::DOMNode* newNode = interpreterImpl->_document->importNode(scxml, true);
//    interpreterImpl->_document->adoptNode(newNode);
	interpreterImpl->_document->appendChild(newNode);

//    std::cerr << *(interpreterImpl->_document);

	interpreterImpl->_baseURL = absUrl;

	InterpreterImpl::addInstance(interpreterImpl);
	return interpreter;
}

Interpreter Interpreter::fromDocument(XERCESC_NS::DOMDocument* dom, const std::string& baseURL, bool copy) {
	URL absUrl = normalizeURL(baseURL);

	std::shared_ptr<InterpreterImpl> interpreterImpl(new InterpreterImpl());
	Interpreter interpreter(interpreterImpl);

	if (copy) {
		// *copy* the given XERCESC_NS::DOM to get rid of event listeners
		XERCESC_NS::DOMImplementation* implementation = XERCESC_NS::DOMImplementationRegistry::getDOMImplementation(X("core"));
		interpreterImpl->_document = implementation->createDocument();

		// we need to import the parent - to support xpath test150
		XERCESC_NS::DOMNode* newNode = interpreterImpl->_document->importNode(dom->getDocumentElement(), true);
		interpreterImpl->_document->appendChild(newNode);

	} else {
		interpreterImpl->_document = dom;
	}

	interpreterImpl->_baseURL = absUrl;

	InterpreterImpl::addInstance(interpreterImpl);
	return interpreter;
}

Interpreter Interpreter::fromURL(const std::string& url) {
	URL absUrl = normalizeURL(url);

	std::shared_ptr<InterpreterImpl> interpreterImpl(new InterpreterImpl());
	Interpreter interpreter(interpreterImpl);

	std::unique_ptr<XERCESC_NS::XercesDOMParser> parser(new XERCESC_NS::XercesDOMParser());
	parser->setValidationScheme(XERCESC_NS::XercesDOMParser::Val_Always);
	parser->setDoNamespaces(true);

	// we do not have a real schema anyway
	parser->useScanner(XERCESC_NS::XMLUni::fgWFXMLScanner);

	std::unique_ptr<XERCESC_NS::ErrorHandler> errHandler(new XERCESC_NS::HandlerBase());
	parser->setErrorHandler(errHandler.get());


	try {
		std::string tmp = absUrl;
		parser->parse(tmp.c_str());
		interpreterImpl->_document = parser->adoptDocument();
		interpreterImpl->_baseURL = absUrl;
		InterpreterImpl::addInstance(interpreterImpl);
	}

	catch (const XERCESC_NS::SAXParseException& toCatch) {
		LOG(ERROR) << X(toCatch.getMessage());
	} catch (const XERCESC_NS::RuntimeException& toCatch) {
		LOG(ERROR) << X(toCatch.getMessage());
	} catch (const XERCESC_NS::XMLException& toCatch) {
		LOG(ERROR) << X(toCatch.getMessage());
	} catch (const XERCESC_NS::DOMException& toCatch) {
		LOG(ERROR) << X(toCatch.getMessage());
	}

	return interpreter;

}

void Interpreter::reset() {
	return _impl->reset();
}

InterpreterState Interpreter::step(size_t blockMs) {
	return _impl->step(blockMs);
};

void Interpreter::cancel() {
	return _impl->cancel();
}

bool Interpreter::isInState(const std::string& stateId) {
	return _impl->isInState(stateId);
}

InterpreterState Interpreter::getState() {
	return _impl->getState();
}

std::list<XERCESC_NS::DOMElement*> Interpreter::getConfiguration() {
	return _impl->getConfiguration();
}

void Interpreter::receive(const Event& event) {
	_impl->enqueueExternal(event);
}

void Interpreter::setActionLanguage(ActionLanguage actionLanguage) {
	return _impl->setActionLanguage(actionLanguage);
}

void Interpreter::setFactory(Factory* factory) {
	return _impl->setFactory(factory);
}

void Interpreter::addMonitor(InterpreterMonitor* monitor) {
	return _impl->addMonitor(monitor);
}

void Interpreter::removeMonitor(InterpreterMonitor* monitor) {
	return _impl->removeMonitor(monitor);
}

std::list<InterpreterIssue> Interpreter::validate() {
	return InterpreterIssue::forInterpreter(_impl.get());
}

std::recursive_mutex StateTransitionMonitor::_mutex;

#if 0
static void printNodeSet(const std::list<XERCESC_NS::DOMElement*> nodes) {
	std::string seperator;
	for (auto nIter = nodes.begin(); nIter != nodes.end(); nIter++) {
		std::cerr << seperator << (HAS_ATTR(*nIter, "id") ? ATTR(*nIter, "id") : DOMUtils::xPathForNode(*nIter));
		seperator = ", ";
	}
}
#endif

void StateTransitionMonitor::beforeTakingTransition(Interpreter& interpreter, const XERCESC_NS::DOMElement* transition) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	std::cerr << "Transition: " << uscxml::DOMUtils::xPathForNode(transition) << std::endl;
}

void StateTransitionMonitor::onStableConfiguration(Interpreter& interpreter) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	std::cerr << "Stable Config: { ";
//	printNodeSet(_interpreter.getConfiguration());
	std::cerr << " }" << std::endl;
}

void StateTransitionMonitor::beforeProcessingEvent(Interpreter& interpreter, const uscxml::Event& event) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	switch (event.eventType) {
	case uscxml::Event::INTERNAL:
		std::cerr << "Internal Event: " << event.name << std::endl;
		break;
	case uscxml::Event::EXTERNAL:
		std::cerr << "External Event: " << event.name << std::endl;
		break;
	case uscxml::Event::PLATFORM:
		std::cerr << "Platform Event: " << event.name << std::endl;
		break;
	}
}

void StateTransitionMonitor::beforeExecutingContent(Interpreter& interpreter, const XERCESC_NS::DOMElement* element) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	std::cerr << "Executable Content: " << DOMUtils::xPathForNode(element) << std::endl;
}

void StateTransitionMonitor::beforeExitingState(Interpreter& interpreter, const XERCESC_NS::DOMElement* state) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	std::cerr << "Exiting: " << (HAS_ATTR(state, "id") ? ATTR(state, "id") : DOMUtils::xPathForNode(state)) << std::endl;
}

void StateTransitionMonitor::beforeEnteringState(Interpreter& interpreter, const XERCESC_NS::DOMElement* state) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	std::cerr << "Entering: " << (HAS_ATTR(state, "id") ? ATTR(state, "id") : DOMUtils::xPathForNode(state)) << std::endl;

}

void StateTransitionMonitor::beforeMicroStep(Interpreter& interpreter) {
	std::lock_guard<std::recursive_mutex> lock(_mutex);
	std::cerr << "Config: {";
//	printNodeSet(_interpreter.getConfiguration());
	std::cerr << "}" << std::endl;
}

}