--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/RecfileHandler.h Sat Mar 30 01:12:42 2019 +0100
@@ -0,0 +1,138 @@
+/**
+ * Relational pipes
+ * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * 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/>.
+ */
+#pragma once
+
+#include <string>
+#include <vector>
+#include <iostream>
+#include <sstream>
+#include <locale>
+#include <codecvt>
+#include <regex>
+#include <cassert>
+
+#include <relpipe/reader/typedefs.h>
+#include <relpipe/reader/TypeId.h>
+#include <relpipe/reader/handlers/RelationalReaderValueHandler.h>
+#include <relpipe/reader/handlers/AttributeMetadata.h>
+
+#include "RecfileWriter.h"
+
+namespace relpipe {
+namespace out {
+namespace recfile {
+
+using namespace relpipe::reader;
+
+class RecfileHandler : public handlers::RelationalReaderValueHadler {
+private:
+ shared_ptr<RecfileWriter> recfileWriter;
+ std::vector<TypeId> columnTypes;
+ std::vector<string_t> columnTypeCodes;
+ std::vector<string_t> columnNames;
+ integer_t valueCount = 0;
+ integer_t columnCount = 0;
+ integer_t relationCount = 0;
+
+public:
+
+ RecfileHandler(std::ostream& output) : recfileWriter(new RecfileWriter(output)) {
+ }
+
+ void startRelation(string_t name, std::vector<handlers::AttributeMetadata> attributes) override {
+ valueCount = 0;
+ columnCount = 0;
+
+ if (relationCount == 0) {
+ recfileWriter->writeStartSequence(); // root
+ } else {
+ recfileWriter->writeEndSequence();
+ recfileWriter->writeEndSequence();
+ }
+ relationCount++;
+ recfileWriter->writeStartSequence(); // relation
+
+ recfileWriter->writeString(name);
+
+
+ recfileWriter->writeStartSequence(); // relation metadata
+ columnCount = attributes.size();
+ columnTypes.resize(columnCount);
+ columnTypeCodes.resize(columnCount);
+ columnNames.resize(columnCount);
+ for (int i = 0; i < attributes.size(); i++) {
+ columnNames[i] = attributes[i].getAttributeName();
+ columnTypes[i] = attributes[i].getTypeId();
+ columnTypeCodes[i] = attributes[i].getTypeName();
+
+ recfileWriter->writeStartSequence(); // attribute-metadata
+ recfileWriter->writeString(columnNames[i]);
+ recfileWriter->writeString(columnTypeCodes[i]);
+ recfileWriter->writeEndSequence();
+ }
+ recfileWriter->writeEndSequence();
+
+ }
+
+ void attribute(const void* value, const std::type_info& type) override {
+ integer_t i = valueCount % columnCount;
+
+ if (i == 0 && valueCount) recfileWriter->writeEndSequence();
+ if (i == 0) recfileWriter->writeStartSequence();
+
+ valueCount++;
+
+ switch (columnTypes[i]) {
+ case TypeId::BOOLEAN:
+ {
+ assert(type == typeid (boolean_t));
+ auto* typedValue = static_cast<const boolean_t*> (value);
+ recfileWriter->writeBoolean(*typedValue);
+ break;
+ }
+ case TypeId::INTEGER:
+ {
+ assert(type == typeid (integer_t));
+ auto* typedValue = static_cast<const integer_t*> (value);
+ recfileWriter->writeInteger(*typedValue);
+ break;
+ }
+ case TypeId::STRING:
+ {
+ assert(type == typeid (string_t));
+ auto* typedValue = static_cast<const string_t*> (value);
+ recfileWriter->writeString(*typedValue);
+ break;
+ }
+ default:
+ throw cli::RelpipeCLIException(L"Unsupported type in RecfileHandler.attribute()", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR);
+ }
+
+ }
+
+ void endOfPipe() {
+ if (valueCount) recfileWriter->writeEndSequence();
+ if (relationCount) recfileWriter->writeEndSequence();
+ recfileWriter->writeEndSequence();
+ }
+
+};
+
+}
+}
+}