crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 1 | /** |
| 2 | * Copyright (C) 2007 Google Inc. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
limpbizkit@gmail.com | 9a227be | 2010-07-03 15:51:31 +0000 | [diff] [blame] | 17 | package com.google.inject.internal.util; |
crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 18 | |
sberlin | d9c913a | 2011-06-26 21:02:54 +0000 | [diff] [blame^] | 19 | import static com.google.common.base.Preconditions.checkNotNull; |
sberlin | dfee9fd | 2010-10-30 14:15:06 +0000 | [diff] [blame] | 20 | |
| 21 | import java.lang.reflect.Constructor; |
| 22 | import java.lang.reflect.Field; |
| 23 | import java.lang.reflect.Member; |
| 24 | import java.lang.reflect.Method; |
crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 25 | import java.lang.reflect.Modifier; |
| 26 | |
sberlin | dfee9fd | 2010-10-30 14:15:06 +0000 | [diff] [blame] | 27 | |
crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 28 | /** |
| 29 | * Class utilities. |
| 30 | */ |
limpbizkit@gmail.com | 9a227be | 2010-07-03 15:51:31 +0000 | [diff] [blame] | 31 | public final class Classes { |
crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 32 | |
| 33 | public static boolean isInnerClass(Class<?> clazz) { |
limpbizkit | eb06177 | 2008-06-30 01:47:50 +0000 | [diff] [blame] | 34 | return !Modifier.isStatic(clazz.getModifiers()) |
| 35 | && clazz.getEnclosingClass() != null; |
crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | public static boolean isConcrete(Class<?> clazz) { |
| 39 | int modifiers = clazz.getModifiers(); |
| 40 | return !clazz.isInterface() && !Modifier.isAbstract(modifiers); |
| 41 | } |
sberlin | dfee9fd | 2010-10-30 14:15:06 +0000 | [diff] [blame] | 42 | |
| 43 | /** |
| 44 | * Formats a member as concise string, such as {@code java.util.ArrayList.size}, |
| 45 | * {@code java.util.ArrayList<init>()} or {@code java.util.List.remove()}. |
| 46 | */ |
| 47 | public static String toString(Member member) { |
| 48 | Class<? extends Member> memberType = Classes.memberType(member); |
| 49 | |
| 50 | if (memberType == Method.class) { |
| 51 | return member.getDeclaringClass().getName() + "." + member.getName() + "()"; |
| 52 | } else if (memberType == Field.class) { |
| 53 | return member.getDeclaringClass().getName() + "." + member.getName(); |
| 54 | } else if (memberType == Constructor.class) { |
| 55 | return member.getDeclaringClass().getName() + ".<init>()"; |
| 56 | } else { |
| 57 | throw new AssertionError(); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Returns {@code Field.class}, {@code Method.class} or {@code Constructor.class}. |
| 63 | */ |
| 64 | public static Class<? extends Member> memberType(Member member) { |
| 65 | checkNotNull(member, "member"); |
| 66 | |
| 67 | if (member instanceof Field) { |
| 68 | return Field.class; |
| 69 | |
| 70 | } else if (member instanceof Method) { |
| 71 | return Method.class; |
| 72 | |
| 73 | } else if (member instanceof Constructor) { |
| 74 | return Constructor.class; |
| 75 | |
| 76 | } else { |
| 77 | throw new IllegalArgumentException( |
| 78 | "Unsupported implementation class for Member, " + member.getClass()); |
| 79 | } |
| 80 | } |
crazyboblee | d0c4b8b | 2007-09-06 02:47:04 +0000 | [diff] [blame] | 81 | } |