Handling xercesc::DOMException in "read-xml-file" and "external-text-formatter"

* external DOM may cause xercesc::DOMException's to be thrown instead of passing all errors to the custom error handlers
** these exceptions are handled by this commit by setting the "result" attribute to "error" and adding "error" value nodes with further information

3 files changed, 30 insertions, 9 deletions

diff --git a/src/function/base.h b/src/function/base.h
index 56712bb..3ca1d61 100644
--- a/src/function/base.h
+++ b/src/function/base.h
@@ -82,7 +82,7 @@ class FunctionBase : public xalan::Function {
 		const xalan::XalanDOMString& getError(
 			xalan::XalanDOMString& result) const {
 			result.assign(std::string(
-				"The function expects "          +
+				"The function expects "         +
 				std::to_string(parameter_count) +
 				" parameter(s)"
 			).data());
diff --git a/src/function/external_text_formatter.cc b/src/function/external_text_formatter.cc
index 9fef439..4171ded 100644
--- a/src/function/external_text_formatter.cc
+++ b/src/function/external_text_formatter.cc
@@ -84,10 +84,21 @@ xercesc::DOMDocument* FunctionExternalTextFormatter::constructDocument(
 	result.setAttribute("code",      std::to_string(status.exit_status()));
 
 	if ( status.exited() ) {
-		result.setAttribute("result", "success");
-		result.setContent(
-			importDocumentElement(outputStream, domDocument)->getChildNodes()
-		);
+		try {
+			result.setContent(
+				importDocumentElement(outputStream, domDocument)->getChildNodes()
+			);
+
+			result.setAttribute("result", "success");
+		}
+		catch ( const xercesc::DOMException& exception ) {
+			result.setAttribute("result", "error");
+
+			result.setValueNode(
+				"error",
+				*XercesStringGuard<char>(exception.msg)
+			);
+		}
 	} else {
 		result.setAttribute("result", "error");
 	}
diff --git a/src/function/read_xml_file.cc b/src/function/read_xml_file.cc
index 65989b2..e4d256d 100644
--- a/src/function/read_xml_file.cc
+++ b/src/function/read_xml_file.cc
@@ -61,11 +61,21 @@ xercesc::DOMDocument* FunctionReadXmlFile::constructDocument(
 	result.setAttribute("path", filePath.string());
 
 	if ( boost::filesystem::is_regular_file(filePath) ) {
-		result.setAttribute("result", "success");
+		try {
+			result.setContent(
+				importDocumentElement(filePath.string(), domDocument)
+			);
 
-		result.setContent(
-			importDocumentElement(filePath.string(), domDocument)
-		);
+			result.setAttribute("result", "success");
+		}
+		catch ( const xercesc::DOMException& exception ) {
+			result.setAttribute("result", "error");
+
+			result.setValueNode(
+				"error",
+				*XercesStringGuard<char>(exception.msg)
+			);
+		}
 	} else {
 		result.setAttribute("result", "error");
 	}