#835 Remove all injector classes from AuthMe, update installer tasks

src/test/java/tools/utils/InjectorUtils.java

@@ -0,0 +1,55 @@
+package tools.utils;
+
+import ch.jalu.injector.InjectorBuilder;
+import ch.jalu.injector.handlers.instantiation.DependencyDescription;
+import ch.jalu.injector.handlers.instantiation.Instantiation;
+import ch.jalu.injector.handlers.instantiation.InstantiationProvider;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Utility for operations with the injector.
+ */
+public final class InjectorUtils {
+
+    private InjectorUtils() {
+    }
+
+    /**
+     * Returns a class' dependencies as determined by the injector.
+     *
+     * @param clazz the class to process
+     * @return the class' dependencies, or null if no instantiation method found
+     */
+    public static Set<Class<?>> getDependencies(Class<?> clazz) {
+        Instantiation<?> instantiation = getInstantiationMethod(clazz);
+        if (instantiation == null) {
+            return null;
+        }
+        Set<Class<?>> dependencies = new HashSet<>();
+        for (DependencyDescription description : instantiation.getDependencies()) {
+            dependencies.add(description.getType());
+        }
+        return dependencies;
+    }
+
+    /**
+     * Returns the instantiation method for the given class.
+     *
+     * @param clazz the class to process
+     * @return the instantiation method for the class, or null if none applicable
+     */
+    public static Instantiation<?> getInstantiationMethod(Class<?> clazz) {
+        List<InstantiationProvider> providers = InjectorBuilder.createInstantiationProviders();
+        for (InstantiationProvider provider : providers) {
+            Instantiation<?> instantiation = provider.get(clazz);
+            if (instantiation != null) {
+                return instantiation;
+            }
+        }
+        return null;
+    }
+
+}