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An API and a tool to run load-flow computations
/**
* Copyright (c) 2017, RTE (http://www.rte-france.com)
* Copyright (c) 2023, Coreso SA (https://www.coreso.eu/) and TSCNET Services GmbH (https://www.tscnet.eu/)
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package com.powsybl.loadflow.json;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.powsybl.commons.json.JsonUtil;
import com.powsybl.loadflow.LoadFlowResult;
import com.powsybl.loadflow.LoadFlowResultImpl;
import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.*;
/**
* @author Christian Biasuzzi {@literal }
* @author Damien Jeandemange {@literal }
*/
public class LoadFlowResultDeserializer extends StdDeserializer {
private static final String CONTEXT_NAME = "LoadFlowResult";
public static final String UNEXPECTED_FIELD = "Unexpected field: ";
LoadFlowResultDeserializer() {
super(LoadFlowResult.class);
}
public LoadFlowResult.ComponentResult deserializeComponentResult(JsonParser parser, String version) throws IOException {
Integer connectedComponentNum = null;
Integer synchronousComponentNum = null;
LoadFlowResult.ComponentResult.Status status = null;
String statusText = null;
Map metrics = Collections.emptyMap();
Integer iterationCount = null;
List slackBusResults = new ArrayList<>();
String referenceBusId = null;
String slackBusId = null;
Double slackBusActivePowerMismatch = null;
Double distributedActivePower = null;
while (parser.nextToken() != JsonToken.END_OBJECT) {
switch (parser.getCurrentName()) {
case "connectedComponentNum" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(LoadFlowResultDeserializer.class.getName(), parser.getCurrentName(), version, "1.2");
parser.nextToken();
connectedComponentNum = parser.getValueAsInt();
}
case "synchronousComponentNum" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(LoadFlowResultDeserializer.class.getName(), parser.getCurrentName(), version, "1.2");
parser.nextToken();
synchronousComponentNum = parser.getValueAsInt();
}
case "componentNum" -> {
JsonUtil.assertLessThanReferenceVersion(LoadFlowResultDeserializer.class.getName(), parser.getCurrentName(), version, "1.2");
parser.nextToken();
synchronousComponentNum = parser.getValueAsInt();
}
case "status" -> {
parser.nextToken();
String tempStatus = parser.getValueAsString();
if (version.compareTo("1.4") < 0 && "SOLVER_FAILED".equals(tempStatus)) {
// SOLVER_FAILED removed in v1.4, translated to FAILED, information kept in statusText which didn't exist before v1.4
statusText = tempStatus;
tempStatus = LoadFlowResult.ComponentResult.Status.FAILED.name();
}
status = LoadFlowResult.ComponentResult.Status.valueOf(tempStatus);
}
case "statusText" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(CONTEXT_NAME, "Tag: statusText", version, "1.4");
parser.nextToken();
statusText = parser.getValueAsString();
}
case "metrics" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(CONTEXT_NAME, "Tag: metrics", version, "1.4");
parser.nextToken();
metrics = parser.readValueAs(HashMap.class);
}
case "iterationCount" -> {
parser.nextToken();
iterationCount = parser.getValueAsInt();
}
case "referenceBusId" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(CONTEXT_NAME, "Tag: referenceBusId", version, "1.4");
parser.nextToken();
referenceBusId = parser.getValueAsString();
}
case "slackBusResults" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(CONTEXT_NAME, "Tag: slackBusResults", version, "1.4");
parser.nextToken();
deserializeSlackBusResults(parser, slackBusResults);
}
case "slackBusId" -> {
JsonUtil.assertLessThanReferenceVersion(LoadFlowResultDeserializer.class.getName(), parser.getCurrentName(), version, "1.4");
parser.nextToken();
slackBusId = parser.getValueAsString();
}
case "slackBusActivePowerMismatch" -> {
JsonUtil.assertLessThanReferenceVersion(LoadFlowResultDeserializer.class.getName(), parser.getCurrentName(), version, "1.4");
parser.nextToken();
slackBusActivePowerMismatch = parser.getValueAsDouble();
}
case "distributedActivePower" -> {
JsonUtil.assertGreaterOrEqualThanReferenceVersion(LoadFlowResultDeserializer.class.getName(), parser.getCurrentName(), version, "1.3");
parser.nextToken();
distributedActivePower = parser.getValueAsDouble();
}
default -> throw new IllegalStateException(UNEXPECTED_FIELD + parser.getCurrentName());
}
}
if (connectedComponentNum == null) {
if (version.compareTo("1.2") < 0) {
connectedComponentNum = 0;
} else {
throw new IllegalStateException("Connected component number field not found.");
}
}
if (synchronousComponentNum == null) {
throw new IllegalStateException("Synchronous component number field not found.");
}
if (iterationCount == null) {
throw new IllegalStateException("Iteration count field not found.");
}
if (distributedActivePower == null) {
if (version.compareTo("1.3") < 0) {
distributedActivePower = Double.NaN;
} else {
throw new IllegalStateException("Distributed active power field not found.");
}
}
if (version.compareTo("1.4") < 0) {
if (slackBusId == null) {
throw new IllegalStateException("Slack bus id field not found.");
}
if (slackBusActivePowerMismatch == null) {
throw new IllegalStateException("Slack bus active power mismatch field not found.");
}
referenceBusId = slackBusId;
slackBusResults = List.of(new LoadFlowResultImpl.SlackBusResultImpl(slackBusId, slackBusActivePowerMismatch));
}
return new LoadFlowResultImpl.ComponentResultImpl(
connectedComponentNum, synchronousComponentNum,
status, statusText, metrics, iterationCount,
referenceBusId, slackBusResults, distributedActivePower
);
}
public LoadFlowResult.SlackBusResult deserializeSlackBusResult(JsonParser parser) throws IOException {
String id = null;
Double activePowerMismatch = null;
while (parser.nextToken() != JsonToken.END_OBJECT) {
switch (parser.getCurrentName()) {
case "id" -> {
parser.nextToken();
id = parser.getValueAsString();
}
case "activePowerMismatch" -> {
parser.nextToken();
activePowerMismatch = parser.getValueAsDouble();
}
default -> throw new IllegalStateException(UNEXPECTED_FIELD + parser.getCurrentName());
}
}
if (id == null) {
throw new IllegalStateException("Slack bus result: id field not found.");
}
if (activePowerMismatch == null) {
throw new IllegalStateException("Slack bus result: active power mismatch field not found.");
}
return new LoadFlowResultImpl.SlackBusResultImpl(id, activePowerMismatch);
}
public void deserializeComponentResults(JsonParser parser, List componentResults, String version) throws IOException {
while (parser.nextToken() != JsonToken.END_ARRAY) {
componentResults.add(deserializeComponentResult(parser, version));
}
}
public void deserializeSlackBusResults(JsonParser parser, List slackBusResults) throws IOException {
while (parser.nextToken() != JsonToken.END_ARRAY) {
slackBusResults.add(deserializeSlackBusResult(parser));
}
}
@Override
public LoadFlowResult deserialize(JsonParser parser, DeserializationContext ctx) throws IOException {
String version = null;
Boolean ok = null;
Map metrics = null;
String log = null;
List componentResults = new ArrayList<>();
while (parser.nextToken() != JsonToken.END_OBJECT) {
switch (parser.getCurrentName()) {
case "version" -> {
parser.nextToken();
version = parser.getValueAsString();
}
case "isOK" -> {
parser.nextToken();
ok = parser.readValueAs(Boolean.class);
}
case "metrics" -> {
parser.nextToken();
metrics = parser.readValueAs(HashMap.class);
}
case "componentResults" -> {
JsonUtil.assertGreaterThanReferenceVersion(CONTEXT_NAME, "Tag: componentResults", version, "1.0");
parser.nextToken();
deserializeComponentResults(parser, componentResults, version);
}
default -> throw new IllegalStateException(UNEXPECTED_FIELD + parser.getCurrentName());
}
}
if (ok == null) {
throw new IllegalStateException("Ok field not found");
}
return new LoadFlowResultImpl(ok, metrics, log, componentResults);
}
public static LoadFlowResult read(InputStream is) throws IOException {
Objects.requireNonNull(is);
ObjectMapper objectMapper = JsonUtil.createObjectMapper();
objectMapper.registerModule(new LoadFlowResultJsonModule());
return objectMapper.readValue(is, LoadFlowResult.class);
}
public static LoadFlowResult read(Path jsonFile) {
Objects.requireNonNull(jsonFile);
try (InputStream is = Files.newInputStream(jsonFile)) {
return read(is);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
}