Add a registered documentation set.

src/main/java/org/nwapw/abacus/plugin/PluginManager.java

@@ -1,6 +1,8 @@
 package org.nwapw.abacus.plugin;
 
 import org.nwapw.abacus.Abacus;
+import org.nwapw.abacus.function.Documentation;
+import org.nwapw.abacus.function.DocumentationType;
 import org.nwapw.abacus.function.Function;
 import org.nwapw.abacus.function.Operator;
 import org.nwapw.abacus.number.NumberInterface;
@@ -34,6 +36,10 @@ public class PluginManager {
      * The map of number implementations registered by the plugins.
      */
     private Map<String, NumberImplementation> registeredNumberImplementations;
+    /**
+     * The map of documentation for functions registered by the plugins.
+     */
+    private Set<Documentation> registeredDocumentation;
     /**
      * The list of number implementations that have been
      * found by their implementation class.
@@ -65,6 +71,7 @@ public class PluginManager {
         registeredFunctions = new HashMap<>();
         registeredOperators = new HashMap<>();
         registeredNumberImplementations = new HashMap<>();
+        registeredDocumentation = new HashSet<>();
         cachedInterfaceImplementations = new HashMap<>();
         cachedPi = new HashMap<>();
         listeners = new HashSet<>();
@@ -97,6 +104,15 @@ public class PluginManager {
         registeredNumberImplementations.put(name, implementation);
     }
 
+    /**
+     * Registers the given documentation with the plugin manager,
+     * making it accessible to the plugin manager etc.
+     * @param documentation the documentation to register.
+     */
+    public void registerDocumentation(Documentation documentation){
+        registeredDocumentation.add(documentation);
+    }
+
     /**
      * Gets the function registered under the given name.
      * @param name the name of the function.
@@ -124,6 +140,19 @@ public class PluginManager {
         return registeredNumberImplementations.get(name);
     }
 
+    /**
+     * Gets the documentation for the given entity of the given type.
+     * @param name the name of the entity to search for.
+     * @param type the type that this entity is, to filter out similarly named documentation.
+     * @return the documentation object.
+     */
+    public Documentation documentationFor(String name, DocumentationType type){
+        for(Documentation entry : registeredDocumentation){
+            if(entry.getCodeName().equals(name) && entry.getType() == type) return entry;
+        }
+        return null;
+    }
+
     /**
      * Gets the number implementation for the given implementation class.
      *
@@ -212,6 +241,7 @@ public class PluginManager {
         registeredFunctions.clear();
         registeredOperators.clear();
         registeredNumberImplementations.clear();
+        registeredDocumentation.clear();
         cachedInterfaceImplementations.clear();
         cachedPi.clear();
         listeners.forEach(e -> e.onUnload(this));