001/* 002 * Copyright 2002-2019 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.core.type; 018 019import java.lang.reflect.Modifier; 020import java.util.LinkedHashSet; 021 022import org.springframework.lang.Nullable; 023import org.springframework.util.Assert; 024import org.springframework.util.StringUtils; 025 026/** 027 * {@link ClassMetadata} implementation that uses standard reflection 028 * to introspect a given {@code Class}. 029 * 030 * @author Juergen Hoeller 031 * @since 2.5 032 */ 033public class StandardClassMetadata implements ClassMetadata { 034 035 private final Class<?> introspectedClass; 036 037 038 /** 039 * Create a new StandardClassMetadata wrapper for the given Class. 040 * @param introspectedClass the Class to introspect 041 * @deprecated since 5.2 in favor of {@link StandardAnnotationMetadata} 042 */ 043 @Deprecated 044 public StandardClassMetadata(Class<?> introspectedClass) { 045 Assert.notNull(introspectedClass, "Class must not be null"); 046 this.introspectedClass = introspectedClass; 047 } 048 049 /** 050 * Return the underlying Class. 051 */ 052 public final Class<?> getIntrospectedClass() { 053 return this.introspectedClass; 054 } 055 056 057 @Override 058 public String getClassName() { 059 return this.introspectedClass.getName(); 060 } 061 062 @Override 063 public boolean isInterface() { 064 return this.introspectedClass.isInterface(); 065 } 066 067 @Override 068 public boolean isAnnotation() { 069 return this.introspectedClass.isAnnotation(); 070 } 071 072 @Override 073 public boolean isAbstract() { 074 return Modifier.isAbstract(this.introspectedClass.getModifiers()); 075 } 076 077 @Override 078 public boolean isFinal() { 079 return Modifier.isFinal(this.introspectedClass.getModifiers()); 080 } 081 082 @Override 083 public boolean isIndependent() { 084 return (!hasEnclosingClass() || 085 (this.introspectedClass.getDeclaringClass() != null && 086 Modifier.isStatic(this.introspectedClass.getModifiers()))); 087 } 088 089 @Override 090 @Nullable 091 public String getEnclosingClassName() { 092 Class<?> enclosingClass = this.introspectedClass.getEnclosingClass(); 093 return (enclosingClass != null ? enclosingClass.getName() : null); 094 } 095 096 @Override 097 @Nullable 098 public String getSuperClassName() { 099 Class<?> superClass = this.introspectedClass.getSuperclass(); 100 return (superClass != null ? superClass.getName() : null); 101 } 102 103 @Override 104 public String[] getInterfaceNames() { 105 Class<?>[] ifcs = this.introspectedClass.getInterfaces(); 106 String[] ifcNames = new String[ifcs.length]; 107 for (int i = 0; i < ifcs.length; i++) { 108 ifcNames[i] = ifcs[i].getName(); 109 } 110 return ifcNames; 111 } 112 113 @Override 114 public String[] getMemberClassNames() { 115 LinkedHashSet<String> memberClassNames = new LinkedHashSet<>(4); 116 for (Class<?> nestedClass : this.introspectedClass.getDeclaredClasses()) { 117 memberClassNames.add(nestedClass.getName()); 118 } 119 return StringUtils.toStringArray(memberClassNames); 120 } 121 122}