cn.handyplus.lib.metrics.Metrics Maven / Gradle / Ivy
/*
* This Metrics class was auto-generated and can be copied into your project if you are
* not using a build tool like Gradle or Maven for dependency management.
*
* IMPORTANT: You are not allowed to modify this class, except changing the package.
*
* Disallowed modifications include but are not limited to:
* - Remove the option for users to opt-out
* - Change the frequency for data submission
* - Obfuscate the code (every obfuscator should allow you to make an exception for specific files)
* - Reformat the code (if you use a linter, add an exception)
*
* Violations will result in a ban of your plugin and account from bStats.
*/
package cn.handyplus.lib.metrics;
import cn.handyplus.lib.adapter.HandySchedulerUtil;
import org.bukkit.Bukkit;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
import javax.net.ssl.HttpsURLConnection;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.Callable;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Supplier;
import java.util.logging.Level;
import java.util.stream.Collectors;
import java.util.zip.GZIPOutputStream;
/**
* 统计类
*
* @author handy
*/
public class Metrics {
private final Plugin plugin;
private final MetricsBase metricsBase;
/**
* Creates a new Metrics instance.
*
* @param plugin Your plugin instance.
* @param serviceId The id of the service. It can be found at What is my plugin id?
*/
public Metrics(JavaPlugin plugin, int serviceId) {
this.plugin = plugin;
// Get the config file
File bStatsFolder = new File(plugin.getDataFolder().getParentFile(), "bStats");
File configFile = new File(bStatsFolder, "config.yml");
YamlConfiguration config = YamlConfiguration.loadConfiguration(configFile);
if (!config.isSet("serverUuid")) {
config.addDefault("enabled", true);
config.addDefault("serverUuid", UUID.randomUUID().toString());
config.addDefault("logFailedRequests", false);
config.addDefault("logSentData", false);
config.addDefault("logResponseStatusText", false);
// Inform the server owners about bStats
config
.options()
.header(
"bStats (https://bStats.org) collects some basic information for plugin authors, like how\n"
+ "many people use their plugin and their total player count. It's recommended to keep bStats\n"
+ "enabled, but if you're not comfortable with this, you can turn this setting off. There is no\n"
+ "performance penalty associated with having metrics enabled, and data sent to bStats is fully\n"
+ "anonymous.")
.copyDefaults(true);
try {
config.save(configFile);
} catch (IOException ignored) {
}
}
// Load the data
boolean enabled = config.getBoolean("enabled", true);
String serverUUID = config.getString("serverUuid");
boolean logErrors = config.getBoolean("logFailedRequests", false);
boolean logSentData = config.getBoolean("logSentData", false);
boolean logResponseStatusText = config.getBoolean("logResponseStatusText", false);
metricsBase =
new MetricsBase(
"bukkit",
serverUUID,
serviceId,
enabled,
this::appendPlatformData,
this::appendServiceData,
HandySchedulerUtil::runTaskAsynchronously,
plugin::isEnabled,
(message, error) -> this.plugin.getLogger().log(Level.WARNING, message, error),
(message) -> this.plugin.getLogger().log(Level.INFO, message),
logErrors,
logSentData,
logResponseStatusText);
}
/**
* Shuts down the underlying scheduler service.
*/
public void shutdown() {
metricsBase.shutdown();
}
/**
* Adds a custom chart.
*
* @param chart The chart to add.
*/
public void addCustomChart(CustomChart chart) {
metricsBase.addCustomChart(chart);
}
private void appendPlatformData(JsonObjectBuilder builder) {
builder.appendField("playerAmount", getPlayerAmount());
builder.appendField("onlineMode", Bukkit.getOnlineMode() ? 1 : 0);
builder.appendField("bukkitVersion", Bukkit.getVersion());
builder.appendField("bukkitName", Bukkit.getName());
builder.appendField("javaVersion", System.getProperty("java.version"));
builder.appendField("osName", System.getProperty("os.name"));
builder.appendField("osArch", System.getProperty("os.arch"));
builder.appendField("osVersion", System.getProperty("os.version"));
builder.appendField("coreCount", Runtime.getRuntime().availableProcessors());
}
private void appendServiceData(JsonObjectBuilder builder) {
builder.appendField("pluginVersion", plugin.getDescription().getVersion());
}
private int getPlayerAmount() {
try {
// Around MC 1.8 the return type was changed from an array to a collection,
// This fixes java.lang.NoSuchMethodError:
// org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Collection;
Method onlinePlayersMethod = Class.forName("org.bukkit.Server").getMethod("getOnlinePlayers");
return onlinePlayersMethod.getReturnType().equals(Collection.class)
? ((Collection) onlinePlayersMethod.invoke(Bukkit.getServer())).size()
: ((Player[]) onlinePlayersMethod.invoke(Bukkit.getServer())).length;
} catch (Exception e) {
// Just use the new method if the reflection failed
return Bukkit.getOnlinePlayers().size();
}
}
public static class MetricsBase {
/**
* The version of the Metrics class.
*/
public static final String METRICS_VERSION = "3.0.2";
private static final String REPORT_URL = "https://bStats.org/api/v2/data/%s";
private final ScheduledExecutorService scheduler;
private final String platform;
private final String serverUuid;
private final int serviceId;
private final Consumer appendPlatformDataConsumer;
private final Consumer appendServiceDataConsumer;
private final Consumer submitTaskConsumer;
private final Supplier checkServiceEnabledSupplier;
private final BiConsumer errorLogger;
private final Consumer infoLogger;
private final boolean logErrors;
private final boolean logSentData;
private final boolean logResponseStatusText;
private final Set customCharts = new HashSet<>();
private final boolean enabled;
/**
* Creates a new MetricsBase class instance.
*
* @param platform The platform of the service.
* @param serviceId The id of the service.
* @param serverUuid The server uuid.
* @param enabled Whether or not data sending is enabled.
* @param appendPlatformDataConsumer A consumer that receives a {@code JsonObjectBuilder} and
* appends all platform-specific data.
* @param appendServiceDataConsumer A consumer that receives a {@code JsonObjectBuilder} and
* appends all service-specific data.
* @param submitTaskConsumer A consumer that takes a runnable with the submit task. This can be
* used to delegate the data collection to a another thread to prevent errors caused by
* concurrency. Can be {@code null}.
* @param checkServiceEnabledSupplier A supplier to check if the service is still enabled.
* @param errorLogger A consumer that accepts log message and an error.
* @param infoLogger A consumer that accepts info log messages.
* @param logErrors Whether or not errors should be logged.
* @param logSentData Whether or not the sent data should be logged.
* @param logResponseStatusText Whether or not the response status text should be logged.
*/
public MetricsBase(
String platform,
String serverUuid,
int serviceId,
boolean enabled,
Consumer appendPlatformDataConsumer,
Consumer appendServiceDataConsumer,
Consumer submitTaskConsumer,
Supplier checkServiceEnabledSupplier,
BiConsumer errorLogger,
Consumer infoLogger,
boolean logErrors,
boolean logSentData,
boolean logResponseStatusText) {
ScheduledThreadPoolExecutor scheduler =
new ScheduledThreadPoolExecutor(1, task -> new Thread(task, "bStats-Metrics"));
// We want delayed tasks (non-periodic) that will execute in the future to be
// cancelled when the scheduler is shutdown.
// Otherwise, we risk preventing the server from shutting down even when
// MetricsBase#shutdown() is called
scheduler.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
this.scheduler = scheduler;
this.platform = platform;
this.serverUuid = serverUuid;
this.serviceId = serviceId;
this.enabled = enabled;
this.appendPlatformDataConsumer = appendPlatformDataConsumer;
this.appendServiceDataConsumer = appendServiceDataConsumer;
this.submitTaskConsumer = submitTaskConsumer;
this.checkServiceEnabledSupplier = checkServiceEnabledSupplier;
this.errorLogger = errorLogger;
this.infoLogger = infoLogger;
this.logErrors = logErrors;
this.logSentData = logSentData;
this.logResponseStatusText = logResponseStatusText;
checkRelocation();
if (enabled) {
// WARNING: Removing the option to opt-out will get your plugin banned from
// bStats
startSubmitting();
}
}
public void addCustomChart(CustomChart chart) {
this.customCharts.add(chart);
}
public void shutdown() {
scheduler.shutdown();
}
private void startSubmitting() {
final Runnable submitTask =
() -> {
if (!enabled || !checkServiceEnabledSupplier.get()) {
// Submitting data or service is disabled
scheduler.shutdown();
return;
}
if (submitTaskConsumer != null) {
submitTaskConsumer.accept(this::submitData);
} else {
this.submitData();
}
};
// Many servers tend to restart at a fixed time at xx:00 which causes an uneven
// distribution of requests on the
// bStats backend. To circumvent this problem, we introduce some randomness into
// the initial and second delay.
// WARNING: You must not modify and part of this Metrics class, including the
// submit delay or frequency!
// WARNING: Modifying this code will get your plugin banned on bStats. Just
// don't do it!
long initialDelay = (long) (1000 * 60 * (3 + Math.random() * 3));
long secondDelay = (long) (1000 * 60 * (Math.random() * 30));
scheduler.schedule(submitTask, initialDelay, TimeUnit.MILLISECONDS);
scheduler.scheduleAtFixedRate(
submitTask, initialDelay + secondDelay, 1000 * 60 * 30, TimeUnit.MILLISECONDS);
}
private void submitData() {
final JsonObjectBuilder baseJsonBuilder = new JsonObjectBuilder();
appendPlatformDataConsumer.accept(baseJsonBuilder);
final JsonObjectBuilder serviceJsonBuilder = new JsonObjectBuilder();
appendServiceDataConsumer.accept(serviceJsonBuilder);
JsonObjectBuilder.JsonObject[] chartData =
customCharts.stream()
.map(customChart -> customChart.getRequestJsonObject(errorLogger, logErrors))
.filter(Objects::nonNull)
.toArray(JsonObjectBuilder.JsonObject[]::new);
serviceJsonBuilder.appendField("id", serviceId);
serviceJsonBuilder.appendField("customCharts", chartData);
baseJsonBuilder.appendField("service", serviceJsonBuilder.build());
baseJsonBuilder.appendField("serverUUID", serverUuid);
baseJsonBuilder.appendField("metricsVersion", METRICS_VERSION);
JsonObjectBuilder.JsonObject data = baseJsonBuilder.build();
scheduler.execute(
() -> {
try {
// Send the data
sendData(data);
} catch (Exception e) {
// Something went wrong! :(
if (logErrors) {
errorLogger.accept("Could not submit bStats metrics data", e);
}
}
});
}
private void sendData(JsonObjectBuilder.JsonObject data) throws Exception {
if (logSentData) {
infoLogger.accept("Sent bStats metrics data: " + data.toString());
}
String url = String.format(REPORT_URL, platform);
HttpsURLConnection connection = (HttpsURLConnection) new URL(url).openConnection();
// Compress the data to save bandwidth
byte[] compressedData = compress(data.toString());
connection.setRequestMethod("POST");
connection.addRequestProperty("Accept", "application/json");
connection.addRequestProperty("Connection", "close");
connection.addRequestProperty("Content-Encoding", "gzip");
connection.addRequestProperty("Content-Length", String.valueOf(compressedData.length));
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("User-Agent", "Metrics-Service/1");
connection.setDoOutput(true);
try (DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream())) {
outputStream.write(compressedData);
}
StringBuilder builder = new StringBuilder();
try (BufferedReader bufferedReader =
new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
String line;
while ((line = bufferedReader.readLine()) != null) {
builder.append(line);
}
}
if (logResponseStatusText) {
infoLogger.accept("Sent data to bStats and received response: " + builder);
}
}
/**
* Checks that the class was properly relocated.
*/
private void checkRelocation() {
// You can use the property to disable the check in your test environment
if (System.getProperty("bstats.relocatecheck") == null
|| !System.getProperty("bstats.relocatecheck").equals("false")) {
// Maven's Relocate is clever and changes strings, too. So we have to use this
// little "trick" ... :D
final String defaultPackage =
new String(new byte[]{'o', 'r', 'g', '.', 'b', 's', 't', 'a', 't', 's'});
final String examplePackage =
new String(new byte[]{'y', 'o', 'u', 'r', '.', 'p', 'a', 'c', 'k', 'a', 'g', 'e'});
// We want to make sure no one just copy & pastes the example and uses the wrong
// package names
if (MetricsBase.class.getPackage().getName().startsWith(defaultPackage)
|| MetricsBase.class.getPackage().getName().startsWith(examplePackage)) {
throw new IllegalStateException("bStats Metrics class has not been relocated correctly!");
}
}
}
/**
* Gzips the given string.
*
* @param str The string to gzip.
* @return The gzipped string.
*/
private static byte[] compress(final String str) throws IOException {
if (str == null) {
return null;
}
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
try (GZIPOutputStream gzip = new GZIPOutputStream(outputStream)) {
gzip.write(str.getBytes(StandardCharsets.UTF_8));
}
return outputStream.toByteArray();
}
}
public static class SimplePie extends CustomChart {
private final Callable callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public SimplePie(String chartId, Callable callable) {
super(chartId);
this.callable = callable;
}
@Override
protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
String value = callable.call();
if (value == null || value.isEmpty()) {
// Null = skip the chart
return null;
}
return new JsonObjectBuilder().appendField("value", value).build();
}
}
public static class MultiLineChart extends CustomChart {
private final Callable> callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public MultiLineChart(String chartId, Callable> callable) {
super(chartId);
this.callable = callable;
}
@Override
protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
Map map = callable.call();
if (map == null || map.isEmpty()) {
// Null = skip the chart
return null;
}
boolean allSkipped = true;
for (Map.Entry entry : map.entrySet()) {
if (entry.getValue() == 0) {
// Skip this invalid
continue;
}
allSkipped = false;
valuesBuilder.appendField(entry.getKey(), entry.getValue());
}
if (allSkipped) {
// Null = skip the chart
return null;
}
return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
}
}
public static class AdvancedPie extends CustomChart {
private final Callable> callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public AdvancedPie(String chartId, Callable> callable) {
super(chartId);
this.callable = callable;
}
@Override
protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
Map map = callable.call();
if (map == null || map.isEmpty()) {
// Null = skip the chart
return null;
}
boolean allSkipped = true;
for (Map.Entry entry : map.entrySet()) {
if (entry.getValue() == 0) {
// Skip this invalid
continue;
}
allSkipped = false;
valuesBuilder.appendField(entry.getKey(), entry.getValue());
}
if (allSkipped) {
// Null = skip the chart
return null;
}
return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
}
}
public static class SimpleBarChart extends CustomChart {
private final Callable> callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public SimpleBarChart(String chartId, Callable> callable) {
super(chartId);
this.callable = callable;
}
@Override
protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
Map map = callable.call();
if (map == null || map.isEmpty()) {
// Null = skip the chart
return null;
}
for (Map.Entry entry : map.entrySet()) {
valuesBuilder.appendField(entry.getKey(), new int[]{entry.getValue()});
}
return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
}
}
public static class AdvancedBarChart extends CustomChart {
private final Callable> callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public AdvancedBarChart(String chartId, Callable> callable) {
super(chartId);
this.callable = callable;
}
@Override
protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
Map map = callable.call();
if (map == null || map.isEmpty()) {
// Null = skip the chart
return null;
}
boolean allSkipped = true;
for (Map.Entry entry : map.entrySet()) {
if (entry.getValue().length == 0) {
// Skip this invalid
continue;
}
allSkipped = false;
valuesBuilder.appendField(entry.getKey(), entry.getValue());
}
if (allSkipped) {
// Null = skip the chart
return null;
}
return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
}
}
public static class DrilldownPie extends CustomChart {
private final Callable>> callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public DrilldownPie(String chartId, Callable>> callable) {
super(chartId);
this.callable = callable;
}
@Override
public JsonObjectBuilder.JsonObject getChartData() throws Exception {
JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
Map> map = callable.call();
if (map == null || map.isEmpty()) {
// Null = skip the chart
return null;
}
boolean reallyAllSkipped = true;
for (Map.Entry> entryValues : map.entrySet()) {
JsonObjectBuilder valueBuilder = new JsonObjectBuilder();
boolean allSkipped = true;
for (Map.Entry valueEntry : map.get(entryValues.getKey()).entrySet()) {
valueBuilder.appendField(valueEntry.getKey(), valueEntry.getValue());
allSkipped = false;
}
if (!allSkipped) {
reallyAllSkipped = false;
valuesBuilder.appendField(entryValues.getKey(), valueBuilder.build());
}
}
if (reallyAllSkipped) {
// Null = skip the chart
return null;
}
return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
}
}
public abstract static class CustomChart {
private final String chartId;
protected CustomChart(String chartId) {
if (chartId == null) {
throw new IllegalArgumentException("chartId must not be null");
}
this.chartId = chartId;
}
public JsonObjectBuilder.JsonObject getRequestJsonObject(
BiConsumer errorLogger, boolean logErrors) {
JsonObjectBuilder builder = new JsonObjectBuilder();
builder.appendField("chartId", chartId);
try {
JsonObjectBuilder.JsonObject data = getChartData();
if (data == null) {
// If the data is null we don't send the chart.
return null;
}
builder.appendField("data", data);
} catch (Throwable t) {
if (logErrors) {
errorLogger.accept("Failed to get data for custom chart with id " + chartId, t);
}
return null;
}
return builder.build();
}
protected abstract JsonObjectBuilder.JsonObject getChartData() throws Exception;
}
public static class SingleLineChart extends CustomChart {
private final Callable callable;
/**
* Class constructor.
*
* @param chartId The id of the chart.
* @param callable The callable which is used to request the chart data.
*/
public SingleLineChart(String chartId, Callable callable) {
super(chartId);
this.callable = callable;
}
@Override
protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
int value = callable.call();
if (value == 0) {
// Null = skip the chart
return null;
}
return new JsonObjectBuilder().appendField("value", value).build();
}
}
/**
* An extremely simple JSON builder.
*
* While this class is neither feature-rich nor the most performant one, it's sufficient enough
* for its use-case.
*/
public static class JsonObjectBuilder {
private StringBuilder builder = new StringBuilder();
private boolean hasAtLeastOneField = false;
public JsonObjectBuilder() {
builder.append("{");
}
/**
* Appends a null field to the JSON.
*
* @param key The key of the field.
* @return A reference to this object.
*/
public JsonObjectBuilder appendNull(String key) {
appendFieldUnescaped(key, "null");
return this;
}
/**
* Appends a string field to the JSON.
*
* @param key The key of the field.
* @param value The value of the field.
* @return A reference to this object.
*/
public JsonObjectBuilder appendField(String key, String value) {
if (value == null) {
throw new IllegalArgumentException("JSON value must not be null");
}
appendFieldUnescaped(key, "\"" + escape(value) + "\"");
return this;
}
/**
* Appends an integer field to the JSON.
*
* @param key The key of the field.
* @param value The value of the field.
* @return A reference to this object.
*/
public JsonObjectBuilder appendField(String key, int value) {
appendFieldUnescaped(key, String.valueOf(value));
return this;
}
/**
* Appends an object to the JSON.
*
* @param key The key of the field.
* @param object The object.
* @return A reference to this object.
*/
public JsonObjectBuilder appendField(String key, JsonObject object) {
if (object == null) {
throw new IllegalArgumentException("JSON object must not be null");
}
appendFieldUnescaped(key, object.toString());
return this;
}
/**
* Appends a string array to the JSON.
*
* @param key The key of the field.
* @param values The string array.
* @return A reference to this object.
*/
public JsonObjectBuilder appendField(String key, String[] values) {
if (values == null) {
throw new IllegalArgumentException("JSON values must not be null");
}
String escapedValues =
Arrays.stream(values)
.map(value -> "\"" + escape(value) + "\"")
.collect(Collectors.joining(","));
appendFieldUnescaped(key, "[" + escapedValues + "]");
return this;
}
/**
* Appends an integer array to the JSON.
*
* @param key The key of the field.
* @param values The integer array.
* @return A reference to this object.
*/
public JsonObjectBuilder appendField(String key, int[] values) {
if (values == null) {
throw new IllegalArgumentException("JSON values must not be null");
}
String escapedValues =
Arrays.stream(values).mapToObj(String::valueOf).collect(Collectors.joining(","));
appendFieldUnescaped(key, "[" + escapedValues + "]");
return this;
}
/**
* Appends an object array to the JSON.
*
* @param key The key of the field.
* @param values The integer array.
* @return A reference to this object.
*/
public JsonObjectBuilder appendField(String key, JsonObject[] values) {
if (values == null) {
throw new IllegalArgumentException("JSON values must not be null");
}
String escapedValues =
Arrays.stream(values).map(JsonObject::toString).collect(Collectors.joining(","));
appendFieldUnescaped(key, "[" + escapedValues + "]");
return this;
}
/**
* Appends a field to the object.
*
* @param key The key of the field.
* @param escapedValue The escaped value of the field.
*/
private void appendFieldUnescaped(String key, String escapedValue) {
if (builder == null) {
throw new IllegalStateException("JSON has already been built");
}
if (key == null) {
throw new IllegalArgumentException("JSON key must not be null");
}
if (hasAtLeastOneField) {
builder.append(",");
}
builder.append("\"").append(escape(key)).append("\":").append(escapedValue);
hasAtLeastOneField = true;
}
/**
* Builds the JSON string and invalidates this builder.
*
* @return The built JSON string.
*/
public JsonObject build() {
if (builder == null) {
throw new IllegalStateException("JSON has already been built");
}
JsonObject object = new JsonObject(builder.append("}").toString());
builder = null;
return object;
}
/**
* Escapes the given string like stated in ....
*
*
This method escapes only the necessary characters '"', '\'. and '\u0000' - '\u001F'.
* Compact escapes are not used (e.g., '\n' is escaped as "\u000a" and not as "\n").
*
* @param value The value to escape.
* @return The escaped value.
*/
private static String escape(String value) {
final StringBuilder builder = new StringBuilder();
for (int i = 0; i < value.length(); i++) {
char c = value.charAt(i);
if (c == '"') {
builder.append("\\\"");
} else if (c == '\\') {
builder.append("\\\\");
} else if (c <= '\u000F') {
builder.append("\\u000").append(Integer.toHexString(c));
} else if (c <= '\u001F') {
builder.append("\\u00").append(Integer.toHexString(c));
} else {
builder.append(c);
}
}
return builder.toString();
}
/**
* A super simple representation of a JSON object.
*
*
This class only exists to make methods of the {@link JsonObjectBuilder} type-safe and not
* allow a raw string inputs for methods like {@link JsonObjectBuilder#appendField(String,
* JsonObject)}.
*/
public static class JsonObject {
private final String value;
private JsonObject(String value) {
this.value = value;
}
@Override
public String toString() {
return value;
}
}
}
}