Scripting engine

Change-Id: I5d6df6fd0d76cc07fd2631b5589f5200d9e50000

src/main/java/com/l2jserver/util/ClassUtils.java

@@ -0,0 +1,94 @@
+/*
+ * This file is part of l2jserver <l2jserver.com>.
+ *
+ * l2jserver is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * l2jserver 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with l2jserver.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.l2jserver.util;
+
+/**
+ * This class contains utilities that are used when we are working with classes
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public class ClassUtils {
+	/**
+	 * Return true if class a is either equivalent to class b, or if class a is
+	 * a subclass of class b, i.e. if a either "extends" or "implements" b. Note
+	 * tht either or both "Class" objects may represent interfaces.
+	 * 
+	 * @param a
+	 *            class
+	 * @param b
+	 *            class
+	 * @return true if a == b or a extends b or a implements b
+	 */
+	public static boolean isSubclass(Class<?> a, Class<?> b) {
+		// We rely on the fact that for any given java class or
+		// primtitive type there is a unqiue Class object, so
+		// we can use object equivalence in the comparisons.
+		if (a == b) {
+			return true;
+		}
+		if (a == null || b == null) {
+			return false;
+		}
+		for (Class<?> x = a; x != null; x = x.getSuperclass()) {
+			if (x == b) {
+				return true;
+			}
+			if (b.isInterface()) {
+				Class<?> interfaces[] = x.getInterfaces();
+				for (Class<?> anInterface : interfaces) {
+					if (isSubclass(anInterface, b)) {
+						return true;
+					}
+				}
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Checks if class in member of the package
+	 * 
+	 * @param clazz
+	 *            class to check
+	 * @param packageName
+	 *            package
+	 * @return true if is member
+	 */
+	public static boolean isPackageMember(Class<?> clazz, String packageName) {
+		return isPackageMember(clazz.getName(), packageName);
+	}
+
+	/**
+	 * Checks if classNames belongs to package
+	 * 
+	 * @param className
+	 *            class name
+	 * @param packageName
+	 *            package
+	 * @return true if belongs
+	 */
+	public static boolean isPackageMember(String className, String packageName) {
+		if (!className.contains(".")) {
+			return packageName == null || packageName.isEmpty();
+		} else {
+			String classPackage = className.substring(0,
+					className.lastIndexOf('.'));
+			return packageName.equals(classPackage);
+		}
+	}
+}