+/*
+ * Copyright 2005-2010 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
package org.wamblee.reflection;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Some utilities for reflection.
+ *
+ * @author Erik Brakkee
+ */
public class ReflectionUtils {
- /**
- * Wraps a type by the corresponding wrapper type if it is a primitive
- * type.
- * @param aClass Type to wrap.
- * @return Wrapped type for primitives or the provided argument value.
- */
- public static Class wrapIfNeeded(Class aClass) {
-
- if (aClass == boolean.class) {
- return Boolean.class;
- }
- if (aClass == byte.class) {
- return Byte.class;
- }
- if (aClass == char.class) {
- return Character.class;
- }
- if (aClass == short.class) {
- return Short.class;
- }
- if (aClass == int.class) {
- return Integer.class;
- }
- if (aClass == long.class) {
- return Long.class;
- }
- if (aClass == float.class) {
- return Float.class;
- }
- if (aClass == double.class) {
- return Double.class;
- }
- if (aClass == void.class) {
- return Void.class;
- }
- return aClass;
- }
+ public static final List<Class> PRIMITIVE_WRAPPERS = createPrimitiveWrappers();
+
+ private static final List<Class> createPrimitiveWrappers() {
+ Class[] vals = { Boolean.class, Byte.class, Character.class,
+ Short.class, Integer.class, Long.class, Float.class, Double.class };
+ return Arrays.asList(vals);
+ }
+
+ /**
+ * Wraps a type by the corresponding wrapper type if it is a primitive type.
+ *
+ * @param aClass
+ * Type to wrap.
+ * @return Wrapped type for primitives or the provided argument value.
+ */
+ public static Class wrapIfNeeded(Class aClass) {
+ if (aClass == boolean.class) {
+ return Boolean.class;
+ }
+
+ if (aClass == byte.class) {
+ return Byte.class;
+ }
+
+ if (aClass == char.class) {
+ return Character.class;
+ }
+
+ if (aClass == short.class) {
+ return Short.class;
+ }
+
+ if (aClass == int.class) {
+ return Integer.class;
+ }
+
+ if (aClass == long.class) {
+ return Long.class;
+ }
+
+ if (aClass == float.class) {
+ return Float.class;
+ }
+
+ if (aClass == double.class) {
+ return Double.class;
+ }
+
+ if (aClass == void.class) {
+ return Void.class;
+ }
+
+ return aClass;
+ }
+
+ public static List<Method> getAllMethods(Class aClass,
+ Class... aExcludedClasses) {
+ if (aClass.isInterface()) {
+ throw new IllegalArgumentException(aClass.getName() +
+ " is not an interface.");
+ }
+ Map<String, Method> found = new HashMap<String, Method>();
+ getAllMethods(aClass, found, Arrays.asList(aExcludedClasses));
+
+ return new ArrayList<Method>(found.values());
+ }
+
+ private static void getAllMethods(Class aClass, Map<String, Method> aFound,
+ List<Class> aExcludedClasses) {
+ List<Method> declared = Arrays.asList(aClass.getDeclaredMethods());
+
+ for (Method method : declared) {
+ Method superMethod = aFound.get(method.getName());
+
+ if (superMethod == null) {
+ // no subclass method
+ aFound.put(method.getName(), method);
+ } else {
+ // subclass method. Check for override.
+ if (!Arrays.equals(superMethod.getParameterTypes(), method
+ .getParameterTypes())) {
+ // parameters differ so this is a new method.
+ aFound.put(method.getName(), method);
+ }
+ }
+ }
+
+ Class superClass = aClass.getSuperclass();
+
+ if (superClass != null && !aExcludedClasses.contains(superClass)) {
+ getAllMethods(superClass, aFound, aExcludedClasses);
+ }
+ }
+
+ public static List<Field> getAllFields(Class aClass,
+ Class... aExcludedClasses) {
+ if (aClass.isInterface()) {
+ throw new IllegalArgumentException(aClass.getName() +
+ " is an interface.");
+ }
+ List<Field> found = new ArrayList<Field>();
+ getAllFields(aClass, found, Arrays.asList(aExcludedClasses));
+
+ return found;
+ }
+
+ private static void getAllFields(Class aClass, List<Field> aFound,
+ List<Class> aExcludedClasses) {
+ List<Field> declared = Arrays.asList(aClass.getDeclaredFields());
+
+ for (Field field : declared) {
+ aFound.add(field);
+ }
+
+ Class superClass = aClass.getSuperclass();
+
+ if (superClass != null && !aExcludedClasses.contains(superClass)) {
+ getAllFields(superClass, aFound, aExcludedClasses);
+ }
+ }
+
+ /**
+ * Checks if a class is a primitive type or wrapper type.
+ *
+ * @param aClass
+ * @return
+ */
+ public static boolean isPrimitive(Class aClass) {
+ if (aClass.isPrimitive()) {
+ return true;
+ }
+ return PRIMITIVE_WRAPPERS.contains(aClass);
+ }
}
git://wamblee.org / utils / blobdiff