added first version of XML output.

2 files changed, 183 insertions, 0 deletions

diff --git a/src/plugins/xml/XmlOutput.cpp b/src/plugins/xml/XmlOutput.cpp
new file mode 100644
index 0000000..00aae04
--- /dev/null
+++ b/src/plugins/xml/XmlOutput.cpp
@@ -0,0 +1,116 @@
+/*
+    Ousía
+    Copyright (C) 2014  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 "XmlOutput.hpp"
+
+#include <core/common/Variant.hpp>
+#include <core/common/VariantWriter.hpp>
+
+namespace ousia {
+namespace xml {
+
+void XmlTransformer::writeXml(Handle<Document> doc, std::ostream &out,
+                              Logger &logger, bool pretty)
+{
+	Manager &mgr = doc->getManager();
+	// the outermost tag is the document itself.
+	Rooted<Element> document{new Element{mgr, {nullptr}, "document"}};
+	// then write imports for all references domains.
+	for (auto d : doc->getDomains()) {
+		Rooted<Element> import{
+		    new Element{mgr,
+		                document,
+		                "import",
+		                {{"rel", "domain"}, {"src", d->getName() + ".oxm"}}}};
+		document->addChild(import);
+	}
+	// transform the root element (and, using recursion, everything below it)
+	Rooted<Element> root =
+	    transformStructuredEntity(document, doc->getRoot(), logger, pretty);
+	document->addChild(root);
+	// then serialize.
+	document->serialize(out, "<?xml version=\"1.0\"?>", pretty);
+}
+
+Rooted<Element> XmlTransformer::transformStructuredEntity(
+    Handle<Element> parent, Handle<StructuredEntity> s, Logger &logger,
+    bool pretty)
+{
+	Manager &mgr = parent->getManager();
+	// TODO: Is this the right handling?
+	// copy the attributes.
+	Variant attrs = s->getAttributes();
+	// build them.
+	s->getDescriptor()->getAttributesDescriptor()->build(attrs, logger);
+	// get the array representation.
+	Variant::arrayType attrArr = attrs.asArray();
+	// transform them to string key-value pairs.
+	NodeVector<Attribute> as =
+	    s->getDescriptor()->getAttributesDescriptor()->getAttributes();
+	std::map<std::string, std::string> xmlAttrs;
+	for (size_t a = 0; a < as.size(); a++) {
+		xmlAttrs.emplace(as[a]->getName(),
+		                 VariantWriter::writeJsonToString(attrArr[a], pretty));
+	}
+	// create the XML element itself.
+	Rooted<Element> elem{
+	    new Element{mgr, parent, s->getDescriptor()->getName(), xmlAttrs}};
+	// then transform the fields.
+	NodeVector<FieldDescriptor> fieldDescs =
+	    s->getDescriptor()->getFieldDescriptors();
+	for (size_t f = 0; f < fieldDescs.size(); f++) {
+		NodeVector<StructureNode> field = s->getField(f);
+		Rooted<FieldDescriptor> fieldDesc = fieldDescs[f];
+		// if this is not the default node create an intermediate node for it.
+		Rooted<Element> par = elem;
+		if (fieldDesc->getFieldType() != FieldDescriptor::FieldType::TREE &&
+		    !fieldDesc->isPrimitive()) {
+			par = Rooted<Element>{new Element(mgr, elem, fieldDesc->getName())};
+			elem->addChild(par);
+		}
+		for (auto c : field) {
+			// transform each child.
+			Rooted<Node> child;
+			if (c->isa(&RttiTypes::StructuredEntity)) {
+				child = transformStructuredEntity(
+				    par, c.cast<StructuredEntity>(), logger, pretty);
+			} else if (c->isa(&RttiTypes::DocumentPrimitive)) {
+				child = transformPrimitive(par, c.cast<DocumentPrimitive>(),
+				                           logger, pretty);
+			}
+			// TODO: Handle Anchors
+			if (child != nullptr) {
+				par->addChild(child);
+			}
+		}
+	}
+	return elem;
+}
+Rooted<Text> XmlTransformer::transformPrimitive(Handle<Element> parent,
+                                                Handle<DocumentPrimitive> p,
+                                                Logger &logger, bool pretty)
+{
+	Manager &mgr = parent->getManager();
+	// transform the primitive content.
+	std::string textcontent =
+	    VariantWriter::writeJsonToString(p->getContent(), pretty);
+	Rooted<Text> text{new Text(mgr, parent, textcontent)};
+	return text;
+}
+}
+}
\ No newline at end of file
diff --git a/src/plugins/xml/XmlOutput.hpp b/src/plugins/xml/XmlOutput.hpp
new file mode 100644
index 0000000..51d03f9
--- /dev/null
+++ b/src/plugins/xml/XmlOutput.hpp
@@ -0,0 +1,67 @@
+/*
+    Ousía
+    Copyright (C) 2014  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 XmlOutput.hpp
+ *
+ * This provices an Output generator to serialize any given document to XML.
+ *
+ * @author Benjamin Paaßen (bpaassen@techfak.uni-bielefeld.de)
+ */
+#ifndef _OUSIA_XML_OUTPUT_HPP_
+#define _OUSIA_XML_OUTPUT_HPP_
+
+#include <ostream>
+
+#include <core/model/Document.hpp>
+#include <core/XML.hpp>
+
+namespace ousia {
+namespace xml {
+
+class XmlTransformer {
+private:
+	Rooted<Element> transformStructuredEntity(Handle<Element> parent,
+	                                          Handle<StructuredEntity> s,
+	                                          Logger &logger, bool pretty);
+
+	Rooted<Text> transformPrimitive(Handle<Element> parent,
+	                                   Handle<DocumentPrimitive> p,
+	                                   Logger &logger, bool pretty);
+
+public:
+	/**
+	 * This writes an XML serialization of the given document to the given
+	 * output stream. The serialization is  equivalent to the input XML format,
+	 * safe for the domain references. TODO: Can we change this? If so: how?
+	 * Note, though, that the serialization will not exploit transparency.
+	 * TODO: Can we change that?
+	 *
+	 * @param doc    is some Document.
+	 * @param out    is the output stream the XML serialization of the document
+	 *               shall be written to.
+	 * @param logger is the logger errors shall be written to.
+	 * @param pretty is a flag that manipulates whether newlines and tabs are
+	 *               used.
+	 */
+	void writeXml(Handle<Document> doc, std::ostream &out, Logger &logger,
+	              bool pretty);
+};
+}
+}
+#endif
\ No newline at end of file