relpipe/relpipe-in-filesystem.cpp: streamlet-examples/xpath.cpp@5d3d57d9c323 (annotated)

65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	1	/**
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	2	* Relational pipes
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	3	* Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	4	*
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	5	* This program is free software: you can redistribute it and/or modify
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	6	* it under the terms of the GNU General Public License as published by
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	7	* the Free Software Foundation, version 3 of the License.
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	8	*
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	9	* This program is distributed in the hope that it will be useful,
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	12	* GNU General Public License for more details.
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	13	*
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	14	* You should have received a copy of the GNU General Public License
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	15	* along with this program. If not, see <http://www.gnu.org/licenses/>.
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	16	*/
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	17
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	18	#include "streamlet-common.h"
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	19
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	20	#include <unistd.h>
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	21	#include <regex>
65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	22	#include <libxml++-2.6/libxml++/libxml++.h>
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	23
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	24	class XPathStreamlet : public Streamlet {
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	25	private:
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	26	xmlpp::Node::PrefixNsMap ns;
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	27
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	28	void findXmlnsInEnvironment() {
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	29	std::regex xmlnsEnvPattern("xmlns_(.)=(.)");
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	30	std::cmatch match;
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	31	for (char *env = environ; env; env++) if (std::regex_match(*env, match, xmlnsEnvPattern)) ns[std::string(match[1])] = match[2];
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	32	}
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	33
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	34	void findXmlnsInOptions() {
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	35	for (Option o : getOptions(std::wregex(L"xmlns[:_](.*)"))) ns[convertor.to_bytes(o.nameMatch[1])] = convertor.to_bytes(o.value);
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	36	for (Option o : getOptions(std::wregex(L"xmlns"), std::wregex(L"([^:]+):(.*)"))) ns[convertor.to_bytes(o.valueMatch[1])] = convertor.to_bytes(o.valueMatch[2]);
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	37	}
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	38
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	39	// Modes should share the logic of relpipe-in-xmltable
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	40
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	41	enum class Mode {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	42	STRING,
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	43	BOOLEAN,
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	44	// TODO: support also XML number, when we have a rational or decimal numbers in Relational pipes
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	45	RAW_XML,
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	46	LINE_NUMBER,
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	47	XPATH
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	48	};
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	49
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	50	Mode toMode(std::wstring modeName) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	51	if (modeName == L"string") return Mode::STRING;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	52	else if (modeName == L"boolean") return Mode::BOOLEAN;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	53	else if (modeName == L"raw-xml") return Mode::RAW_XML;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	54	else if (modeName == L"line-number") return Mode::LINE_NUMBER;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	55	else if (modeName == L"xpath") return Mode::XPATH;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	56	else throw std::invalid_argument("Unsupported mode: " + convertor.to_bytes(modeName));
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	57	}
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	58
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	59	std::wstring toType(Mode mode) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	60	if (mode == Mode::BOOLEAN) return BOOLEAN;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	61	else if (mode == Mode::LINE_NUMBER) return INTEGER;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	62	else return STRING;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	63	}
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	64
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	65	// TODO: should not be done in particular streamlets but in the worker
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	66	std::wstring toNullValue(std::wstring type) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	67	if (type == BOOLEAN) return L"false";
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	68	else if (type == INTEGER) return L"0";
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	69	else return L"";
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	70	}
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	71
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	72	class XPathAttribute {
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	73	public:
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	74
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	75	std::wstring name;
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	76	std::wstring xpath;
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	77	Mode mode = Mode::STRING;
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	78	};
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	79
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	80	std::vector<XPathAttribute> xpathAttributes;
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	81
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	82	protected:
65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	83
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	84	std::vector<AttributeMetadata> getOutputAttributesMetadata() override {
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	85	findXmlnsInEnvironment();
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	86	findXmlnsInOptions();
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	87
65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	88	std::vector<AttributeMetadata> oam;
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	89
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	90	std::vector<Option> modeOptions = getOptions(L"mode");
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	91	std::vector<Option> attributeOptions = getOptions(L"attribute");
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	92	for (int i = 0, limit = attributeOptions.size(); i < limit; i++) {
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	93	Mode mode = i < modeOptions.size() ? toMode(modeOptions[i].value) : Mode::STRING;
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	94	std::wstring alias = getAlias(i, attributeOptions[i].value);
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	95	xpathAttributes.push_back({alias, attributeOptions[i].value, mode});
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	96	oam.push_back({alias, toType(mode)});
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	97	}
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	98
65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	99	return oam;
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	100	}
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	101
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	102	std::vector<OutputAttribute> getOutputAttributes() override {
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	103	std::vector<OutputAttribute> oa;
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	104
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	105	try {
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	106	xmlpp::DomParser parser;
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	107	parser.parse_file(convertor.to_bytes(currentFile));
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	108	xmlpp::Element* root = parser.get_document()->get_root_node();
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	109
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	110	for (XPathAttribute xpathAttribute : xpathAttributes) {
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	111	std::string xpath = convertor.to_bytes(xpathAttribute.xpath);
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	112	std::wstring result;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	113	bool isNull = false;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	114
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	115	if (xpathAttribute.mode == Mode::STRING) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	116	result = convertor.from_bytes(root->eval_to_string(xpath, ns));
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	117	} else if (xpathAttribute.mode == Mode::BOOLEAN) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	118	result = root->eval_to_boolean(xpath, ns) ? L"true" : L"false";
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	119	} else if (xpathAttribute.mode == Mode::LINE_NUMBER) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	120	xmlpp::NodeSet attributeNodes = root->find(xpath, ns);
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	121	if (attributeNodes.size()) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	122	result = std::to_wstring(attributeNodes[0]->get_line());
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	123	} else {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	124	result = L"0";
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	125	isNull = true;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	126	}
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	127	} else if (xpathAttribute.mode == Mode::XPATH) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	128	xmlpp::NodeSet attributeNodes = root->find(xpath, ns);
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	129	if (attributeNodes.size()) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	130	result = convertor.from_bytes(attributeNodes[0]->get_path());
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	131	} else {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	132	result = L"";
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	133	isNull = true;
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	134	}
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	135	} else if (xpathAttribute.mode == Mode::RAW_XML) {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	136	throw std::logic_error("Raw XML mode is not yet implemented."); // TODO: implement also RAW_XML
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	137	} else {
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	138	throw std::logic_error("Unsupported mode."); // should never happer
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	139	}
5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	140
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	141	oa.push_back({result, false});
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	142	}
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	143	} catch (xmlpp::parse_error& e) {
68 5d3d57d9c323 streamlet examples: xpath: support multiple modes (string, boolean, line-number, xpath), TODO: raw-xml František Kučera <franta-hg@frantovo.cz> parents: 67 diff changeset	144	for (XPathAttribute xpathAttribute : xpathAttributes) oa.push_back({toNullValue(toType(xpathAttribute.mode)), true});
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	145	// invalid XML → xmlpp::parse_error → just skip this file
0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	146	// invalid XPath → xmlpp::exception → failure
65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	147	}
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	148
67 0766d298eb1c streamlet examples: xpath František Kučera <franta-hg@frantovo.cz> parents: 65 diff changeset	149
65 6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	150	return oa;
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	151	}
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	152	};
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	153
6944a03fb883 streamlet examples: xpath – parse and validate XML document František Kučera <franta-hg@frantovo.cz> parents: diff changeset	154	STREAMLET_RUN(XPathStreamlet)

author	František Kučera <franta-hg@frantovo.cz>
	Tue, 28 Jan 2020 23:18:21 +0100
branch	v_0
changeset 68	5d3d57d9c323
parent 67	0766d298eb1c
child 70	018e2609f5bb
permissions	-rw-r--r--