Rename page and change stuff
Andre_601
parent
c9fc67ca5c
commit
8113bcb420
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@ -1,275 +0,0 @@
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## Overview
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PlaceholderAPI is using Expansions for it's placeholders, with PlaceholderAPI providing the core. Users can download Expansions from the cloud server using commands in game or [here](https://api.extendedclip.com/home/) if they want to use the Placeholder.
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**Note:** It is recommended to create placeholders using expansions for your Plugin instead of creating it inside your Plugin as people can contribute to your placeholders if you upload the code onto sites like Github.
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To begin, start a new Project using your favorite IDE and create a class that `extends PlaceholderExpansion`.
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After implementing the methods, you are ready to work on your Placeholders.
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## Examples
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### Creating Placeholders without any third party plugin.
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This is on how you would do it, when your expansion doesn't depend on any seperate plugin.
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Examples of such expansions are:
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- [Player expansion](/PlaceholderAPI/Player-Expansion)
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- [Math expansion](/PlaceholderAPI/Math-Expansion)
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- [Statistics expansion](/PlaceholderAPI/Statistics-Expansion)
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```java
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package at.helpch.placeholderapi.expansions;
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import org.bukkit.OfflinePlayer;
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import me.clip.placeholderapi.expansion.PlaceholderExpansion;
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/**
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* This class will automatically register as a placeholder expansion
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* when a jar including this class is added to the directory
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* {@code /plugins/PlaceholderAPI/expansions} on your server.
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* <br>
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* <br>If you create such a class inside your own plugin, you have to
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* register it manually in your plugins {@code onEbale()} by using
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* {@code new YourExpansionClass().register();}
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*/
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public class ExampleExpansion extends PlaceholderExpansion {
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/**
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* This method should always return true unless we
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* have a dependency we need to make sure is on the server
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* for our placeholders to work!
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*
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* @return always true since we do not have any dependencies.
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*/
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@Override
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public boolean canRegister(){
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return true;
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}
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/**
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* The name of the person who created this expansion should go here.
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*
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* @return The name of the author as a String.
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*/
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@Override
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public String getAuthor(){
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return "someauthor";
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}
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/**
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* The placeholder identifier should go here.
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* <br>This is what tells PlaceholderAPI to call our onRequest
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* method to obtain a value if a placeholder starts with our
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* identifier.
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* <br>This must be unique and can not contain % or _
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*
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* @return The identifier in {@code %<identifier>_<value>%} as String.
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*/
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@Override
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public String getIdentifier(){
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return "example";
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}
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/**
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* This is the version of this expansion.
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* <br>You don't have to use numbers, since it is set as a String.
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*
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* @return The version as a String.
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*/
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@Override
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public String getVersion(){
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return "1.0.0";
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}
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/**
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* This is the method called when a placeholder with our identifier
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* is found and needs a value.
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* <br>We specify the value identifier in this method.
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* <br>Since version 2.9.1 can you use OfflinePlayers in your requests.
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*
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* @param player
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* A {@link org.bukkit.OfflinePlayer OfflinePlayer}.
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* @param identifier
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* A String containing the identifier/value.
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*
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* @return possibly-null String of the requested identifier.
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*/
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@Override
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public String onRequest(OfflinePlayer player, String identifier){
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// %example_placeholder1%
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if(identifier.equals("placeholder1")){
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return "placeholder1 works";
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}
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// %example_placeholder2%
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if(identifier.equals("placeholder2")){
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return "placeholder2 works";
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}
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// We return null if an invalid placeholder (f.e. %example_placeholder3%)
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// was provided
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return null;
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}
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}
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```
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----
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### Creating placeholders with 3rd party plugins
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This example here applies to people who want to provide information from their own plugin through placeholders from PlaceholderAPI.
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There exists a repository showcasing an [example-expansion](/PlaceholderAPI/Example-Expansion) with what you can/should do.
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In our example do we have the plugin `SomePlugin` and want to show certain placeholders with it.
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```java
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package at.helpch.placeholderapi.expansions;
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import org.bukkit.OfflinePlayer;
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import me.clip.placeholderapi.expansion.PlaceholderExpansion;
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import at.helpch.somePlugin.SomePlugin;
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/**
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* This class will automatically register as a placeholder expansion
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* when a jar including this class is added to the directory
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* {@code /plugins/PlaceholderAPI/expansions} on your server.
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* <br>
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* <br>If you create such a class inside your own plugin, you have to
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* register it manually in your plugins {@code onEbale()} by using
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* {@code new YourExpansionClass().register();}
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*/
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class ExampleExpansion extends PlaceholderExpansion {
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// We get an instance of the plugin later.
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private SomePlugin plugin;
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/**
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* Since this expansion requires api access to the plugin "SomePlugin"
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* we must check if said plugin is on the server or not.
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*
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* @return true or false depending on if the required plugin is installed.
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*/
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@Override
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public boolean canRegister(){
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return Bukkit.getPluginManager().getPlugin(getPlugin()) != null;
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}
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/**
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* We can optionally override this method if we need to initialize variables
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* within this class if we need to or even if we have to do other checks to
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* ensure the hook is properly set up.
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*
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* @return true or false depending on if it can register.
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*/
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@Override
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public boolean register(){
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// Make sure "SomePlugin" is on the server
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if(!canRegister()){
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return false;
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}
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/*
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* "SomePlugin" does not have static methods to access its api so we must
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* create a variable to obtain access to it.
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*/
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plugin = (SomePlugin) Bukkit.getPluginManager().getPlugin(getPlugin());
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// if for some reason we can not get our variable, we should return false.
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if(plugin == null){
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return false;
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}
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/*
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* Since we override the register method, we need to manually
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* register this hook
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*/
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return PlaceholderAPI.registerPlaceholderHook(getIdentifier(), this);
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}
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/**
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* The name of the person who created this expansion should go here.
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*
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* @return The name of the author as a String.
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*/
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@Override
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public String getAuthor(){
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return "someauthor";
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}
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/**
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* The placeholder identifier should go here.
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* <br>This is what tells PlaceholderAPI to call our onRequest
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* method to obtain a value if a placeholder starts with our
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* identifier.
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* <br>This must be unique and can not contain % or _
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*
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* @return The identifier in {@code %<identifier>_<value>%} as String.
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*/
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@Override
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public String getIdentifier(){
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return "someplugin";
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}
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/**
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* if the expansion requires another plugin as a dependency, the
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* proper name of the dependency should go here.
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* <br>Set this to {@code null} if your placeholders do not require
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* another plugin to be installed on the server for them to work.
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* <br>
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* <br>This is extremely important to set your plugin here, since if
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* you don't do it, your expansion will throw errors.
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*
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* @return The name of our dependency.
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*/
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@Override
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public String getRequiredPlugin(){
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return "SomePlugin";
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}
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/**
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* This is the version of this expansion.
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* <br>You don't have to use numbers, since it is set as a String.
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*
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* @return The version as a String.
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*/
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@Override
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public String getVersion(){
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return "1.0.0";
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}
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/**
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* This is the method called when a placeholder with our identifier
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* is found and needs a value.
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* <br>We specify the value identifier in this method.
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* <br>Since version 2.9.1 can you use OfflinePlayers in your requests.
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*
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* @param player
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* A {@link org.bukkit.Player Player}.
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* @param identifier
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* A String containing the identifier/value.
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*
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* @return possibly-null String of the requested identifier.
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*/
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@Override
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public String onPlaceholderRequest(Player player, String identifier){
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if(p == null){
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return "";
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}
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// %someplugin_placeholder1%
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if(identifier.equals("placeholder1")){
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return plugin.getConfig().getString("placeholder1", "value doesnt exist");
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}
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// %someplugin_placeholder2%
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if(identifier.equals("placeholder2")){
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return plugin.getConfig().getString("placeholder2", "value doesnt exist");
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}
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// We return null if an invalid placeholder (f.e. %someplugin_placeholder3%)
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// was provided
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return null;
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}
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}
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```
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###
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@ -0,0 +1,429 @@
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## Overview
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This page covers how you can use the `PlaceholderExpansion` to add own placeholders to PlaceholderAPI, which then can be used by other plugins.
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PlaceholderAPI is using Expansions for it's placeholders, with PlaceholderAPI providing the core. Users can download Expansions from the cloud server using commands in-game or by going [here](https://api.extendedclip.com/home/) if they want to use the placeholder.
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## Note
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You can either make a separate jar file, to upload it to the expansion-cloud (recommended) or have it as a local class inside your plugin.
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## Examples
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There are multiple methods and ways you can use the PlaceholderExpansion.
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Those depend on what you want to display through the placeholders in the end.
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* [Without external plugin](#without-external-plugin)
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* [With external plugin](#with-external-plugin)
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* [Separate jar](#separate-jar)
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* [Internal class](#internal-class)
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### Without external plugin
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This part here covers how you create an expansion that doesn't require any external/additional plugins to function.
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Examples of such expansions are:
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- [Player expansion](/PlaceholderAPI/Player-Expansion)
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- [Math expansion](/PlaceholderAPI/Math-Expansion)
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- [Statistics expansion](/PlaceholderAPI/Statistics-Expansion)
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Since it would be weird (and also make no real sense) to have this inside your plugin, we assume you make a separate jar-file as an expansion.
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To begin, first make the class extend the `PlaceholderExpansion` and add the required methods:
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```java
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package at.helpch.placeholderapi.example.expansions;
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import org.bukkit.OfflinePlayer;
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import me.clip.placeholderapi.expansion.PlaceholderExpansion;
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/**
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* This class will automatically register as a placeholder expansion
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* when a jar including this class is added to the directory
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* {@code /plugins/PlaceholderAPI/expansions} on your server.
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* <br>
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* <br>If you create such a class inside your own plugin, you have to
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* register it manually in your plugins {@code onEbale()} by using
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* {@code new YourExpansionClass().register();}
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*/
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public class ExampleExpansion extends PlaceholderExpansion {
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/**
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* This method should always return true unless we
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* have a dependency we need to make sure is on the server
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* for our placeholders to work!
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*
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* @return always true since we do not have any dependencies.
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*/
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@Override
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public boolean canRegister(){
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return true;
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}
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/**
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* The name of the person who created this expansion should go here.
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*
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* @return The name of the author as a String.
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*/
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@Override
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public String getAuthor(){
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return "someauthor";
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}
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/**
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* The placeholder identifier should go here.
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* <br>This is what tells PlaceholderAPI to call our onRequest
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* method to obtain a value if a placeholder starts with our
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* identifier.
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* <br>This must be unique and can not contain % or _
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*
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* @return The identifier in {@code %<identifier>_<value>%} as String.
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*/
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@Override
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public String getIdentifier(){
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return "example";
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}
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/**
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* This is the version of this expansion.
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* <br>You don't have to use numbers, since it is set as a String.
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*
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* @return The version as a String.
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*/
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@Override
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public String getVersion(){
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return "1.0.0";
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}
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/**
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* This is the method called when a placeholder with our identifier
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* is found and needs a value.
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* <br>We specify the value identifier in this method.
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* <br>Since version 2.9.1 can you use OfflinePlayers in your requests.
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*
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* @param player
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* A {@link org.bukkit.OfflinePlayer OfflinePlayer}.
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* @param identifier
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* A String containing the identifier/value.
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*
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* @return Possibly-null String of the requested identifier.
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*/
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@Override
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public String onRequest(OfflinePlayer player, String identifier){
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// %example_placeholder1%
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if(identifier.equals("placeholder1")){
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return "placeholder1 works";
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}
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// %example_placeholder2%
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if(identifier.equals("placeholder2")){
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return "placeholder2 works";
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}
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// We return null if an invalid placeholder (f.e. %example_placeholder3%)
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// was provided
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return null;
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}
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}
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```
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----
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|
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### With external plugin
|
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This example here applies to people who want to provide information from their own plugin through placeholders from PlaceholderAPI.
|
||||
There exists a repository showcasing an [example-expansion](/PlaceholderAPI/Example-Expansion) with what you can/should do.
|
||||
|
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In our examples do we have the plugin `SomePlugin` and want to show certain placeholders with it.
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There are two ways to actually get information from your plugin and they only are different in if you have the expansion as a separate jar-file or as an internal class.
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#### Separate jar
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In our separate jar do we have to make some checks, to be sure, that the required plugin is installed and running.
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The below code shows how the class can look like in case the plugin doesn't have a public and easy to access API.
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```java
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package at.helpch.placeholderapi.example.expansions;
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import org.bukkit.OfflinePlayer;
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import me.clip.placeholderapi.expansion.PlaceholderExpansion;
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import at.helpch.somePlugin.SomePlugin;
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|
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/**
|
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* This class will automatically register as a placeholder expansion
|
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* when a jar including this class is added to the directory
|
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* {@code /plugins/PlaceholderAPI/expansions} on your server.
|
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* <br>
|
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* <br>If you create such a class inside your own plugin, you have to
|
||||
* register it manually in your plugins {@code onEbale()} by using
|
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* {@code new YourExpansionClass().register();}
|
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*/
|
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class ExampleExpansion extends PlaceholderExpansion {
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|
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// We get an instance of the plugin later.
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private SomePlugin plugin;
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|
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/**
|
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* Since this expansion requires api access to the plugin "SomePlugin"
|
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* we must check if said plugin is on the server or not.
|
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*
|
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* @return true or false depending on if the required plugin is installed.
|
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*/
|
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@Override
|
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public boolean canRegister(){
|
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return Bukkit.getPluginManager().getPlugin(getPlugin()) != null;
|
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}
|
||||
|
||||
/**
|
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* We can optionally override this method if we need to initialize variables
|
||||
* within this class if we need to or even if we have to do other checks to
|
||||
* ensure the hook is properly set up.
|
||||
*
|
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* @return true or false depending on if it can register.
|
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*/
|
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@Override
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public boolean register(){
|
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// Make sure "SomePlugin" is on the server
|
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if(!canRegister()){
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return false;
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}
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|
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/*
|
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* "SomePlugin" does not have static methods to access its api so we must
|
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* create a variable to obtain access to it.
|
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*/
|
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plugin = (SomePlugin) Bukkit.getPluginManager().getPlugin(getPlugin());
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// if for some reason we can not get our variable, we should return false.
|
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if(plugin == null){
|
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return false;
|
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}
|
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|
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/*
|
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* Since we override the register method, we need to manually
|
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* register this hook
|
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*/
|
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return PlaceholderAPI.registerPlaceholderHook(getIdentifier(), this);
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}
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/**
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* The name of the person who created this expansion should go here.
|
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*
|
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* @return The name of the author as a String.
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*/
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@Override
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public String getAuthor(){
|
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return "someauthor";
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}
|
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|
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/**
|
||||
* The placeholder identifier should go here.
|
||||
* <br>This is what tells PlaceholderAPI to call our onRequest
|
||||
* method to obtain a value if a placeholder starts with our
|
||||
* identifier.
|
||||
* <br>This must be unique and can not contain % or _
|
||||
*
|
||||
* @return The identifier in {@code %<identifier>_<value>%} as String.
|
||||
*/
|
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@Override
|
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public String getIdentifier(){
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return "someplugin";
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}
|
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|
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/**
|
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* if the expansion requires another plugin as a dependency, the
|
||||
* proper name of the dependency should go here.
|
||||
* <br>Set this to {@code null} if your placeholders do not require
|
||||
* another plugin to be installed on the server for them to work.
|
||||
* <br>
|
||||
* <br>This is extremely important to set your plugin here, since if
|
||||
* you don't do it, your expansion will throw errors.
|
||||
*
|
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* @return The name of our dependency.
|
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*/
|
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@Override
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public String getRequiredPlugin(){
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return "SomePlugin";
|
||||
}
|
||||
|
||||
/**
|
||||
* This is the version of this expansion.
|
||||
* <br>You don't have to use numbers, since it is set as a String.
|
||||
*
|
||||
* @return The version as a String.
|
||||
*/
|
||||
@Override
|
||||
public String getVersion(){
|
||||
return "1.0.0";
|
||||
}
|
||||
|
||||
/**
|
||||
* This is the method called when a placeholder with our identifier
|
||||
* is found and needs a value.
|
||||
* <br>We specify the value identifier in this method.
|
||||
* <br>Since version 2.9.1 can you use OfflinePlayers in your requests.
|
||||
*
|
||||
* @param player
|
||||
* A {@link org.bukkit.Player Player}.
|
||||
* @param identifier
|
||||
* A String containing the identifier/value.
|
||||
*
|
||||
* @return possibly-null String of the requested identifier.
|
||||
*/
|
||||
@Override
|
||||
public String onPlaceholderRequest(Player player, String identifier){
|
||||
|
||||
if(p == null){
|
||||
return "";
|
||||
}
|
||||
|
||||
// %someplugin_placeholder1%
|
||||
if(identifier.equals("placeholder1")){
|
||||
return plugin.getConfig().getString("placeholder1", "value doesnt exist");
|
||||
}
|
||||
|
||||
// %someplugin_placeholder2%
|
||||
if(identifier.equals("placeholder2")){
|
||||
return plugin.getConfig().getString("placeholder2", "value doesnt exist");
|
||||
}
|
||||
|
||||
// We return null if an invalid placeholder (f.e. %someplugin_placeholder3%)
|
||||
// was provided
|
||||
return null;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
#### Internal class
|
||||
You can have the class inside your plugin.
|
||||
This has some advantages, but can also have some disadvantages.
|
||||
|
||||
|
||||
```java
|
||||
package at.helpch.placeholderapi.example.expansions;
|
||||
|
||||
import org.bukkit.OfflinePlayer;
|
||||
import me.clip.placeholderapi.expansion.PlaceholderExpansion;
|
||||
import at.helpch.somePlugin.SomePlugin;
|
||||
|
||||
/**
|
||||
* This class will be registered through the register-method in the
|
||||
* plugins onEnable-method.
|
||||
*/
|
||||
class ExampleExpansion extends PlaceholderExpansion {
|
||||
|
||||
private SomePlugin plugin;
|
||||
|
||||
/**
|
||||
* Since we register the expansion inside our own plugin, we
|
||||
* can simply use this method here to get an instance of our
|
||||
* plugin.
|
||||
*
|
||||
* @param plugin
|
||||
* The instance of our plugin.
|
||||
*/
|
||||
public ExampleExpansion(SomePlugin plugin){
|
||||
this.plugin = plugin;
|
||||
}
|
||||
|
||||
/**
|
||||
* Because this is a internal class, this check is not needed
|
||||
* and we can simply return {@code true}
|
||||
*
|
||||
* @return Always true since it's an internal class.
|
||||
*/
|
||||
@Override
|
||||
public boolean canRegister(){
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* The name of the person who created this expansion should go here.
|
||||
* <br>For convienience do we return the author from the plugin.yml
|
||||
*
|
||||
* @return The name of the author as a String.
|
||||
*/
|
||||
@Override
|
||||
public String getAuthor(){
|
||||
return plugin.getDescription().getAuthors().toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* The placeholder identifier should go here.
|
||||
* <br>This is what tells PlaceholderAPI to call our onRequest
|
||||
* method to obtain a value if a placeholder starts with our
|
||||
* identifier.
|
||||
* <br>This must be unique and can not contain % or _
|
||||
*
|
||||
* @return The identifier in {@code %<identifier>_<value>%} as String.
|
||||
*/
|
||||
@Override
|
||||
public String getIdentifier(){
|
||||
return "someplugin";
|
||||
}
|
||||
|
||||
/**
|
||||
* This is the version of this expansion.
|
||||
* <br>You don't have to use numbers, since it is set as a String.
|
||||
*
|
||||
* For convienience do we return the version from the plugin.yml
|
||||
*
|
||||
* @return The version as a String.
|
||||
*/
|
||||
@Override
|
||||
public String getVersion(){
|
||||
return plugin.getDescription().getVersion();
|
||||
}
|
||||
|
||||
/**
|
||||
* This is the method called when a placeholder with our identifier
|
||||
* is found and needs a value.
|
||||
* <br>We specify the value identifier in this method.
|
||||
* <br>Since version 2.9.1 can you use OfflinePlayers in your requests.
|
||||
*
|
||||
* @param player
|
||||
* A {@link org.bukkit.Player Player}.
|
||||
* @param identifier
|
||||
* A String containing the identifier/value.
|
||||
*
|
||||
* @return possibly-null String of the requested identifier.
|
||||
*/
|
||||
@Override
|
||||
public String onPlaceholderRequest(Player player, String identifier){
|
||||
|
||||
if(p == null){
|
||||
return "";
|
||||
}
|
||||
|
||||
// %someplugin_placeholder1%
|
||||
if(identifier.equals("placeholder1")){
|
||||
return plugin.getConfig().getString("placeholder1", "value doesnt exist");
|
||||
}
|
||||
|
||||
// %someplugin_placeholder2%
|
||||
if(identifier.equals("placeholder2")){
|
||||
return plugin.getConfig().getString("placeholder2", "value doesnt exist");
|
||||
}
|
||||
|
||||
// We return null if an invalid placeholder (f.e. %someplugin_placeholder3%)
|
||||
// was provided
|
||||
return null;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
As you can see is this method pretty similar to the one without any external plugins, since we can get an instance of our plugin much more easy and also have a 100% guarantee that the plugin is installed and running.
|
||||
|
||||
Our final step now is to register the class and its placeholders. The plugin doesn't do this on its own.
|
||||
To achieve this, add the following to your `onEnable()` section (Use your expansion name of course):
|
||||
```java
|
||||
package at.helpch.placeholderapi.example
|
||||
|
||||
import org.bukkit.Bukkit;
|
||||
import org.bukkit.plugin.java.JavaPlugin;
|
||||
|
||||
public class SomePlugin extends JavaPlugin{
|
||||
|
||||
@Override
|
||||
public void onEnable(){
|
||||
// Small check to make sure that PlaceholderAPI is installed
|
||||
if(Bukkit.getPluginManager().getPlugin("PlaceholderAPI") != null){
|
||||
new ExampleExpansion().register();
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
Loading…
Reference in New Issue