Add CommandFramework module

CommandFramework/src/de/steamwar/command/CommandMetaData.java

@@ -0,0 +1,92 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.command;
+
+import java.lang.annotation.*;
+
+public @interface CommandMetaData {
+
+    /**
+     * This annotation is only for internal use.
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.ANNOTATION_TYPE)
+    @interface Method {
+        Class<?>[] value();
+        int minParameterCount() default 0;
+        int maxParameterCount() default Integer.MAX_VALUE;
+    }
+
+    /**
+     * This annotation denotes what types are allowed as parameter types the annotation annotated with can use.
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.ANNOTATION_TYPE)
+    @interface Parameter {
+        Class<?>[] value() default {};
+        Class<?> handler() default void.class;
+    }
+
+    /**
+     * This annotation can be used in conjunction with a class that implements {@link AbstractTypeMapper} to
+     * create a custom type mapper for a parameter. The class must have one of two constructors with the following
+     * types:
+     * <ul>
+     *     <li>Annotation this annotation annotates</li>
+     *     <li>{@link Class}</li>
+     *     <li>{@link AbstractTypeMapper}, optional, if not present only one per parameter</li>
+     *     <li>{@link java.util.Map} with types {@link String} and {@link AbstractValidator}</li>
+     * </ul>
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.ANNOTATION_TYPE)
+    @interface ImplicitTypeMapper {
+        /**
+         * The validator class that should be used.
+         */
+        Class<?> handler();
+    }
+
+    /**
+     * This annotation can be used in conjunction with a class that implements {@link AbstractValidator} to
+     * create a custom validator short hands for commands. The validator class must have one constructor with
+     * one of the following types:
+     * <ul>
+     *     <li>Annotation this annotation annotates</li>
+     *     <li>{@link Class}</li>
+     *     <li>{@link java.util.Map} with types {@link String} and {@link AbstractValidator}</li>
+     * </ul>
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.ANNOTATION_TYPE)
+    @interface ImplicitValidator {
+        /**
+         * The validator class that should be used.
+         */
+        Class<?> handler();
+
+        /**
+         * Defines when this validator should be processed. Negative numbers denote that this will be
+         * processed before {@link AbstractSWCommand.Validator} and positive numbers
+         * denote that this will be processed after {@link AbstractSWCommand.Validator}.
+         */
+        int order();
+    }
+}