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A Minecraft Bedrock Edition server software implementation made in Java from scratch which supports all new features.
package cn.nukkit.plugin;
import cn.nukkit.Server;
import cn.nukkit.api.PowerNukkitDifference;
import cn.nukkit.api.PowerNukkitOnly;
import cn.nukkit.api.Since;
import cn.nukkit.command.Command;
import cn.nukkit.command.CommandSender;
import cn.nukkit.command.PluginCommand;
import cn.nukkit.command.PluginIdentifiableCommand;
import cn.nukkit.utils.Config;
import cn.nukkit.utils.Utils;
import com.google.common.base.Preconditions;
import lombok.extern.log4j.Log4j2;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Yaml;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedHashMap;
/**
* 一般的Nukkit插件需要继承的类。
* A class to be extended by a normal Nukkit plugin.
*
* @author MagicDroidX(code) @ Nukkit Project
* @author 粉鞋大妈(javadoc) @ Nukkit Project
* @see cn.nukkit.plugin.PluginDescription
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
@Log4j2
abstract public class PluginBase implements Plugin {
private PluginLoader loader;
private Server server;
private boolean isEnabled = false;
private boolean initialized = false;
private PluginDescription description;
private File dataFolder;
private Config config;
private File configFile;
private File file;
private PluginLogger logger;
public void onLoad() {
}
public void onEnable() {
}
public void onDisable() {
}
public final boolean isEnabled() {
return isEnabled;
}
/**
* 加载这个插件。
* Enables this plugin.
*
*
如果你需要卸载这个插件，建议使用{@link #setEnabled(boolean)}
* If you need to disable this plugin, it's recommended to use {@link #setEnabled(boolean)}
*
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
public final void setEnabled() {
this.setEnabled(true);
}
/**
* 加载或卸载这个插件。
* Enables or disables this plugin.
*
*
插件管理器插件常常使用这个方法。
* It's normally used by a plugin manager plugin to manage plugins.
*
* @param value {@code true}为加载，{@code false}为卸载。
{@code true} for enable, {@code false} for disable.
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
@PowerNukkitDifference(info = "Made impossible to disable special the PowerNukkitPlugin", since = "1.3.0.0-PN")
public final void setEnabled(boolean value) {
if (isEnabled != value) {
if (!value && PowerNukkitPlugin.getInstance() == this) {
throw new UnsupportedOperationException("The PowerNukkitPlugin cannot be disabled");
}
isEnabled = value;
if (isEnabled) {
onEnable();
} else {
onDisable();
}
}
}
public final boolean isDisabled() {
return !isEnabled;
}
public final File getDataFolder() {
return dataFolder;
}
public final PluginDescription getDescription() {
return description;
}
/**
* 初始化这个插件。
* Initialize the plugin.
*
*
这个方法会在加载(load)之前被插件加载器调用，初始化关于插件的一些事项，不能被重写。
* Called by plugin loader before load, and initialize the plugin. Can't be overridden.
*
* @param loader 加载这个插件的插件加载器的{@code PluginLoader}对象。
* The plugin loader ,which loads this plugin, as a {@code PluginLoader} object.
* @param server 运行这个插件的服务器的{@code Server}对象。
* The server running this plugin, as a {@code Server} object.
* @param description 描述这个插件的{@code PluginDescription}对象。
* A {@code PluginDescription} object that describes this plugin.
* @param dataFolder 这个插件的数据的文件夹。
* The data folder of this plugin.
* @param file 这个插件的文件{@code File}对象。对于jar格式的插件，就是jar文件本身。
* The {@code File} object of this plugin itself. For jar-packed plugins, it is the jar file itself.
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
public final void init(PluginLoader loader, Server server, PluginDescription description, File dataFolder, File file) {
if (!initialized) {
initialized = true;
this.loader = loader;
this.server = server;
this.description = description;
this.dataFolder = dataFolder;
this.file = file;
this.configFile = new File(this.dataFolder, "config.yml");
this.logger = new PluginLogger(this);
}
}
public PluginLogger getLogger() {
return logger;
}
/**
* 返回这个插件是否已经初始化。
* Returns if this plugin is initialized.
*
* @return 这个插件是否已初始化。
if this plugin is initialized.
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
public final boolean isInitialized() {
return initialized;
}
/**
* TODO: FINISH JAVADOC
*/
@Nullable
public PluginIdentifiableCommand getCommand(String name) {
PluginIdentifiableCommand command = this.getServer().getPluginCommand(name);
if (command == null || !command.getPlugin().equals(this)) {
command = this.getServer().getPluginCommand(this.description.getName().toLowerCase() + ":" + name);
}
if (command != null && command.getPlugin().equals(this)) {
return command;
} else {
return null;
}
}
@PowerNukkitOnly
@Since("1.4.0.0-PN")
@Nullable
public PluginCommand getPluginCommand(@Nonnull String name) {
PluginIdentifiableCommand command = getCommand(name);
if (command instanceof PluginCommand) {
return (PluginCommand) command;
}
return null;
}
@Override
public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
return false;
}
@Override
public InputStream getResource(String filename) {
return this.getClass().getClassLoader().getResourceAsStream(filename);
}
@Override
public boolean saveResource(String filename) {
return saveResource(filename, false);
}
@Override
public boolean saveResource(String filename, boolean replace) {
return saveResource(filename, filename, replace);
}
@Override
public boolean saveResource(String filename, String outputName, boolean replace) {
Preconditions.checkArgument(filename != null && outputName != null, "Filename can not be null!");
Preconditions.checkArgument(filename.trim().length() != 0 && outputName.trim().length() != 0, "Filename can not be empty!");
File out = new File(dataFolder, outputName);
if (!out.exists() || replace) {
try (InputStream resource = getResource(filename)) {
if (resource != null) {
File outFolder = out.getParentFile();
if (!outFolder.exists()) {
outFolder.mkdirs();
}
Utils.writeFile(out, resource);
return true;
}
} catch (IOException e) {
log.error("Error while saving resource {}, to {} (replace: {}, plugin:{})", filename, outputName, replace, getDescription().getName(), e);
}
}
return false;
}
@Override
public Config getConfig() {
if (this.config == null) {
this.reloadConfig();
}
return this.config;
}
@Override
public void saveConfig() {
if (!this.getConfig().save()) {
this.getLogger().critical("Could not save config to " + this.configFile.toString());
}
}
@Override
public void saveDefaultConfig() {
if (!this.configFile.exists()) {
this.saveResource("config.yml", false);
}
}
@Override
public void reloadConfig() {
this.config = new Config(this.configFile);
InputStream configStream = this.getResource("config.yml");
if (configStream != null) {
DumperOptions dumperOptions = new DumperOptions();
dumperOptions.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
Yaml yaml = new Yaml(dumperOptions);
try {
this.config.setDefault(yaml.loadAs(Utils.readFile(this.configFile), LinkedHashMap.class));
} catch (IOException e) {
log.error("Error while reloading configs for the plugin {}", getDescription().getName(), e);
}
}
}
@Override
public Server getServer() {
return server;
}
@Override
public String getName() {
return this.description.getName();
}
/**
* 返回这个插件完整的名字。
* Returns the full name of this plugin.
*
*
一个插件完整的名字由{@code 名字+" v"+版本号}组成。比如：
* A full name of a plugin is composed by {@code name+" v"+version}.for example:
* {@code HelloWorld v1.0.0}
*
* @return 这个插件完整的名字。
The full name of this plugin.
* @see cn.nukkit.plugin.PluginDescription#getFullName
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
public final String getFullName() {
return this.description.getFullName();
}
/**
* 返回这个插件的文件{@code File}对象。对于jar格式的插件，就是jar文件本身。
* Returns the {@code File} object of this plugin itself. For jar-packed plugins, it is the jar file itself.
*
* @return 这个插件的文件 {@code File}对象。
The {@code File} object of this plugin itself.
* @since Nukkit 1.0 | Nukkit API 1.0.0
*/
protected File getFile() {
return file;
}
@Override
public PluginLoader getPluginLoader() {
return this.loader;
}
}