/**
* Copyright 2014 National University of Ireland, Galway.
*
* This file is part of the SIREn project. Project and contact information:
*
* https://github.com/rdelbru/SIREn
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sindice.siren.demo.ncpr;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Iterator;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ObjectNode;
import org.sindice.siren.analysis.JsonTokenizer;
import com.google.common.io.LineReader;
/**
* This class convert the original NCPR JSON dataset into a JSON dataset with
* explicit value datatypes.
*/
public class DatatypeConverter {
private final ObjectMapper mapper;
private final JsonGenerator generator;
private final static String INPUT_FILE = "./src/example/json/ncpr.json";
private final static String OUTPUT_FILE = "./src/example/json/ncpr-with-datatypes.json";
public DatatypeConverter() throws IOException {
this.mapper = new ObjectMapper();
generator = mapper.getJsonFactory().createJsonGenerator(new File(OUTPUT_FILE), JsonEncoding.UTF8);
}
public void process() throws IOException {
final FileReader fileReader = new FileReader(new File(INPUT_FILE));
final LineReader reader = new LineReader(fileReader);
try {
JsonNode obj;
String line;
while ((line = reader.readLine()) != null) {
obj = mapper.readTree(line);
this.convertRatedOutputCurrent(obj);
this.convertRatedOutputVoltage(obj);
this.convertRatedOutputkW(obj);
this.convertLatitude(obj);
this.convertLongitude(obj);
this.convertTetheredCable(obj);
this.convertChargeMode(obj);
this.convertDeviceControllerWebsite(obj);
this.convertDeviceOwnerWebsite(obj);
generator.writeTree(obj);
generator.writeRaw('\n');
}
}
finally {
fileReader.close();
}
}
private void convertRatedOutputkW(final JsonNode obj) {
final Iterator<JsonNode> nodes = obj.path("Connector").iterator();
while (nodes.hasNext()) {
final ObjectNode node = (ObjectNode) nodes.next();
final JsonNode current = node.path("RatedOutputkW");
if (!current.isMissingNode() && !current.isNull()) {
final double value = Double.parseDouble(current.asText());
node.put("RatedOutputkW", value);
}
if (current.isNull()) {
node.remove("RatedOutputkW");
}
}
}
private void convertRatedOutputVoltage(final JsonNode obj) {
final Iterator<JsonNode> nodes = obj.path("Connector").iterator();
while (nodes.hasNext()) {
final ObjectNode node = (ObjectNode) nodes.next();
final JsonNode current = node.path("RatedOutputVoltage");
if (!current.isMissingNode() && !current.isNull()) {
final int value = Integer.parseInt(current.asText());
node.put("RatedOutputVoltage", value);
}
if (current.isNull()) {
node.remove("RatedOutputVoltage");
}
}
}
private void convertRatedOutputCurrent(final JsonNode obj) {
final Iterator<JsonNode> nodes = obj.path("Connector").iterator();
while (nodes.hasNext()) {
final ObjectNode node = (ObjectNode) nodes.next();
final JsonNode current = node.path("RatedOutputCurrent");
if (!current.isMissingNode() && !current.isNull()) {
final int value = Integer.parseInt(current.asText());
node.put("RatedOutputCurrent", value);
}
if (current.isNull()) {
node.remove("RatedOutputCurrent");
}
}
}
private void convertTetheredCable(final JsonNode obj) {
final Iterator<JsonNode> nodes = obj.path("Connector").iterator();
while (nodes.hasNext()) {
final ObjectNode node = (ObjectNode) nodes.next();
final JsonNode current = node.path("TetheredCable");
if (!current.isMissingNode() && !current.isNull()) {
final int value = Integer.parseInt(current.asText());
node.put("TetheredCable", value);
}
if (current.isNull()) {
node.remove("TetheredCable");
}
}
}
private void convertChargeMode(final JsonNode obj) {
final Iterator<JsonNode> nodes = obj.path("Connector").iterator();
while (nodes.hasNext()) {
final ObjectNode node = (ObjectNode) nodes.next();
final JsonNode current = node.path("ChargeMode");
if (!current.isMissingNode() && !current.isNull()) {
final int value = Integer.parseInt(current.asText());
node.put("ChargeMode", value);
}
if (current.isNull()) {
node.remove("ChargeMode");
}
}
}
private void convertLatitude(final JsonNode obj) {
final ObjectNode node = (ObjectNode) obj.path("ChargeDeviceLocation");
final JsonNode current = node.path("Latitude");
if (!current.isMissingNode() && !current.isNull()) {
final double value = Double.parseDouble(current.asText());
node.put("Latitude", value);
}
if (current.isNull()) {
node.remove("Latitude");
}
}
private void convertLongitude(final JsonNode obj) {
final ObjectNode node = (ObjectNode) obj.path("ChargeDeviceLocation");
final JsonNode current = node.path("Longitude");
if (!current.isMissingNode() && !current.isNull()) {
final double value = Double.parseDouble(current.asText());
node.put("Longitude", value);
}
if (current.isNull()) {
node.remove("Longitude");
}
}
private void convertDeviceControllerWebsite(final JsonNode obj) {
final ObjectNode node = (ObjectNode) obj.path("DeviceController");
final JsonNode current = node.path("Website");
if (!current.isMissingNode() && !current.isNull()) {
node.put("Website", this.createValueDatatype("uri", current.asText()));
}
if (current.isNull()) {
node.remove("Website");
}
}
private void convertDeviceOwnerWebsite(final JsonNode obj) {
final ObjectNode node = (ObjectNode) obj.path("DeviceOwner");
final JsonNode current = node.path("Website");
if (!current.isMissingNode() && !current.isNull()) {
node.put("Website", this.createValueDatatype("uri", current.asText()));
}
if (current.isNull()) {
node.remove("Website");
}
}
private JsonNode createValueDatatype(final String datatype, final String value) {
final ObjectNode node = mapper.createObjectNode();
node.put(JsonTokenizer.DATATYPE_LABEL, datatype);
node.put(JsonTokenizer.DATATYPE_VALUES, value);
return node;
}
public void close() throws IOException {
generator.close();
}
public static void main(final String[] args) throws IOException {
final DatatypeConverter preprocessing = new DatatypeConverter();
preprocessing.process();
preprocessing.close();
}
}