Revamped external function result trees

* the root node of the result tree of each function is a domain element
** i.e. the root node of "read-xml-file" is "file", the root node of "read-directory" is "directory"
* the root node contains the result state of the function call encoded in a "result" attribute
** possible values are "success" and "error"
** the root node may contain additional attributes such as the target path of a called transformation
* the actual function result is contained within the child nodes of the function root node
** i.e. the XML file tree returned by "read-xml-file" is a child of the function root node
** if specific errors occured they are also returned as child nodes of the function root node
*** this is currently only the case for "transform" where transformation errors are returned as "error" value node childs of the function root node
* updated test cases accordingly

2 files changed, 15 insertions, 0 deletions

diff --git a/src/support/dom/result_node_facade.cc b/src/support/dom/result_node_facade.cc
index 597448b..eeb2cc6 100644
--- a/src/support/dom/result_node_facade.cc
+++ b/src/support/dom/result_node_facade.cc
@@ -1,6 +1,7 @@
 #include "result_node_facade.h"
 
 #include <xercesc/dom/DOMText.hpp>
+#include <xercesc/dom/DOMNodeList.hpp>
 
 #include "support/xerces_string_guard.h"
 
@@ -21,6 +22,10 @@ ResultNodeFacade::~ResultNodeFacade() {
 	this->root_node_->appendChild(this->result_node_);
 }
 
+xercesc::DOMNode* ResultNodeFacade::getNode() {
+	return this->result_node_;
+}
+
 void ResultNodeFacade::setAttribute(
 	const std::string& name,
 	const std::string& value
@@ -58,4 +63,10 @@ void ResultNodeFacade::setContent(xercesc::DOMNode* node) {
 	this->result_node_->appendChild(node);
 }
 
+void ResultNodeFacade::setContent(xercesc::DOMNodeList* nodes) {
+	for ( std::size_t index = 0; index != nodes->getLength(); ++index ) {
+		this->setContent(nodes->item(index));
+	}
+}
+
 }
diff --git a/src/support/dom/result_node_facade.h b/src/support/dom/result_node_facade.h
index ccdd850..bf73582 100644
--- a/src/support/dom/result_node_facade.h
+++ b/src/support/dom/result_node_facade.h
@@ -18,10 +18,14 @@ class ResultNodeFacade {
 		);
 		~ResultNodeFacade();
 
+		xercesc::DOMNode* getNode();
+
 		void setAttribute(const std::string&, const std::string&);
 		void setValueNode(const std::string&, const std::string&);
+
 		void setContent(const std::string&);
 		void setContent(xercesc::DOMNode*);
+		void setContent(xercesc::DOMNodeList*);
 
 	private:
 		xercesc::DOMDocument* const dom_document_;