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-rw-r--r--src/core/parser/Parser.cpp32
-rw-r--r--src/core/parser/Parser.hpp116
-rw-r--r--src/core/parser/XmlParser.cpp134
-rw-r--r--src/core/parser/XmlParser.hpp63
4 files changed, 148 insertions, 197 deletions
diff --git a/src/core/parser/Parser.cpp b/src/core/parser/Parser.cpp
new file mode 100644
index 0000000..bc98ac0
--- /dev/null
+++ b/src/core/parser/Parser.cpp
@@ -0,0 +1,32 @@
+/*
+ Ousía
+ Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
+
+ 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 <sstream>
+
+#include "Parser.hpp"
+
+namespace ousia {
+
+Rooted<Node> Parser::parse(const std::string &str, Handle<Node> context, Logger &logger)
+{
+ std::istringstream is(str);
+ return parse(is, context, logger);
+}
+
+}
+
diff --git a/src/core/parser/Parser.hpp b/src/core/parser/Parser.hpp
new file mode 100644
index 0000000..74a1988
--- /dev/null
+++ b/src/core/parser/Parser.hpp
@@ -0,0 +1,116 @@
+/*
+ Ousía
+ Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
+
+ 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/>.
+*/
+
+/**
+ * @file Parser.hpp
+ *
+ * Contains the abstract "Parser" class. Parsers are objects capable of reading
+ * a certain file format and transforming it into a node.
+ *
+ * @author Andreas Stöckel (astoecke@techfak.uni-bielefeld.de)
+ */
+
+#ifndef _OUSIA_PARSER_HPP_
+#define _OUSIA_PARSER_HPP_
+
+#include <istream>
+#include <set>
+#include <string>
+
+#include "Exceptions.hpp"
+#include "Node.hpp"
+#include "Logger.hpp"
+
+namespace ousia {
+
+// TODO: Implement a proper Mimetype class
+
+/**
+ * Exception to be thrown whenever an error occurs inside a specific parser.
+ */
+class ParserException : public LoggableException {
+public:
+ using LoggableException::LoggableException;
+};
+
+/**
+ * Abstract parser class. This class builds the basic interface that should be
+ * used by any parser which reads data from an input stream and transforms it
+ * into an Ousía node graph.
+ */
+class Parser {
+public:
+
+ Parser() {};
+ Parser(const Parser&) = delete;
+
+ /**
+ * Returns a set containing all mime types supported by the parser. The mime
+ * types are used to describe the type of the document that is read by the
+ * parser. The default implementation returns an empty set. This method
+ * should be overridden by derived classes.
+ *
+ * @return a set containing the string value of the supported mime types.
+ */
+ virtual std::set<std::string> mimetypes()
+ {
+ return std::set<std::string>{};
+ };
+
+ /**
+ * Parses the given input stream and returns a corresponding node for
+ * inclusion in the document graph. This method should be overridden by
+ * derived classes.
+ *
+ * @param is is a reference to the input stream that should be parsed.
+ * @param context defines the context in which the input stream should be
+ * parsed. The context represents the scope from which element names should
+ * be looked up.
+ * @param logger is a reference to the Logger instance that should be used
+ * to log error messages and warnings that occur while parsing the document.
+ * @return a reference to the node representing the subgraph that has been
+ * created. The resulting node may point at not yet resolved entities, the
+ * calling code will try to resolve these. If no valid node can be produced,
+ * a corresponding LoggableException must be thrown by the parser.
+ */
+ virtual Rooted<Node> parse(std::istream &is, Handle<Node> context,
+ Logger &logger) = 0;
+
+ /**
+ * Parses the given string and returns a corresponding node for
+ * inclusion in the document graph. This method should be overridden by
+ * derived classes.
+ *
+ * @param str is the string that should be parsed.
+ * @param context defines the context in which the input stream should be
+ * parsed. The context represents the scope from which element names should
+ * be looked up.
+ * @param logger is a reference to the Logger instance that should be used
+ * to log error messages and warnings that occur while parsing the document.
+ * @return a reference to the node representing the subgraph that has been
+ * created. The resulting node may point at not yet resolved entities, the
+ * calling code will try to resolve these. If no valid node can be produced,
+ * a corresponding ParserException must be thrown by the parser.
+ */
+ Rooted<Node> parse(const std::string &str, Handle<Node> context,
+ Logger &logger);
+};
+}
+
+#endif /* _OUSIA_PARSER_HPP_ */
+
diff --git a/src/core/parser/XmlParser.cpp b/src/core/parser/XmlParser.cpp
deleted file mode 100644
index f9bb43e..0000000
--- a/src/core/parser/XmlParser.cpp
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- Ousía
- Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
-
- 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 <expat.h>
-
-#include "XmlParser.hpp"
-
-namespace ousia {
-
-/**
- * The XmlParserData struct holds all information relevant to the expat callback
- * functions.
- */
-struct XmlParserData {
- Rooted<Node> context;
- Logger &logger;
-
- XmlParserData(Handle<Node> context, Logger &logger)
- : context(context), logger(logger)
- {
- }
-};
-
-/**
- * Wrapper class around the XML_Parser pointer which safely frees it whenever
- * the scope is left (e.g. because an exception was thrown).
- */
-class ScopedExpatXmlParser {
-private:
- /**
- * Internal pointer to the XML_Parser instance.
- */
- XML_Parser parser;
-
-public:
- /**
- * Constructor of the ScopedExpatXmlParser class. Calls XML_ParserCreateNS
- * from the expat library. Throws a parser exception if the XML parser
- * cannot be initialized.
- *
- * @param encoding is the protocol-defined encoding passed to expat (or
- * nullptr if expat should determine the encoding by itself).
- * @param namespaceSeparator is the separator used to separate the namespace
- * components in the node name given by expat.
- */
- ScopedExpatXmlParser(const XML_Char *encoding, XML_Char namespaceSeparator)
- : parser(nullptr)
- {
- parser = XML_ParserCreateNS("UTF-8", ':');
- if (!parser) {
- throw ParserException{
- "Internal error: Could not create expat XML parser!"};
- }
- }
-
- /**
- * Destuctor of the ScopedExpatXmlParser, frees the XML parser instance.
- */
- ~ScopedExpatXmlParser()
- {
- if (parser) {
- XML_ParserFree(parser);
- parser = nullptr;
- }
- }
-
- /**
- * Returns the XML_Parser pointer.
- */
- XML_Parser operator&() { return parser; }
-};
-
-std::set<std::string> XmlParser::mimetypes()
-{
- return std::set<std::string>{{"text/vnd.ousia.oxm", "text/vnd.ousia.oxd"}};
-}
-
-Rooted<Node> XmlParser::parse(std::istream &is, Handle<Node> context,
- Logger &logger)
-{
- // Create the parser object
- ScopedExpatXmlParser p{"UTF-8", ':'};
-
- // Set the callback functions, provide a pointer to a XmlParserData instance
- // as user data.
- XmlParserData ctx{context, logger};
-
- // Feed data into expat while there is data to process
- const std::streamsize BUFFER_SIZE = 4096; // TODO: Move to own header?
- while (true) {
- // Fetch a buffer from expat for the input data
- char *buf = static_cast<char *>(XML_GetBuffer(&p, BUFFER_SIZE));
- if (!buf) {
- throw ParserException{"Internal error: XML parser out of memory!"};
- }
-
- // Read the input data from the stream
- const std::streamsize bytesRead = is.read(buf, BUFFER_SIZE).gcount();
-
- // Parse the data and handle any XML error
- if (!XML_ParseBuffer(&p, bytesRead, bytesRead == 0)) {
- const int line = XML_GetCurrentLineNumber(&p);
- const int column = XML_GetCurrentColumnNumber(&p);
- const XML_Error code = XML_GetErrorCode(&p);
- const std::string msg = std::string{XML_ErrorString(code)};
- logger.error("XML: " + msg, line, column);
- break;
- }
-
- // Abort once there are no more bytes in the stream
- if (bytesRead == 0) {
- break;
- }
- }
-
- return nullptr;
-}
-}
-
diff --git a/src/core/parser/XmlParser.hpp b/src/core/parser/XmlParser.hpp
deleted file mode 100644
index f6fb060..0000000
--- a/src/core/parser/XmlParser.hpp
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- Ousía
- Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
-
- 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/>.
-*/
-
-/**
- * @file XmlParser.hpp
- *
- * Contains the parser responsible for reading Ousía XML Documents (extension
- * oxd) and Ousía XML Modules (extension oxm).
- *
- * @author Andreas Stöckel (astoecke@techfak.uni-bielefeld.de)
- */
-
-#ifndef _OUSIA_XML_PARSER_HPP_
-#define _OUSIA_XML_PARSER_HPP_
-
-#include <core/Parser.hpp>
-
-namespace ousia {
-
-/**
- * The XmlParser class implements parsing the various types of Ousía XML
- * documents using the expat stream XML parser.
- */
-class XmlParser : public Parser {
-public:
- /**
- * Returns the mimetype supported by the XmlParser which is
- * "text/vnd.ousia.oxm" and "text/vnd.ousia.oxd".
- *
- * @return a list containing the mimetype supported by Ousía.
- */
- std::set<std::string> mimetypes() override;
-
- /**
- * Parses the given input stream as XML file and returns the parsed
- * top-level node. Throws
- *
- * @param is is the input stream that will be parsed.
- */
- Rooted<Node> parse(std::istream &is, Handle<Node> context,
- Logger &logger) override;
-
- using Parser::parse;
-};
-}
-
-#endif /* _OUSIA_XML_PARSER_HPP_ */
-
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