spring ReflectionWrapper 源码
springboot ReflectionWrapper 代码
文件路径：/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/fieldvalues/javac/ReflectionWrapper.java
/*
* Copyright 2012-2020 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
*
* https://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.springframework.boot.configurationprocessor.fieldvalues.javac;
import java.lang.reflect.Method;
/**
* Base class for reflection based wrappers. Used to access internal Java classes without
* needing tools.jar on the classpath.
*
* @author Phillip Webb
*/
class ReflectionWrapper {
private final Class<?> type;
private final Object instance;
ReflectionWrapper(String type, Object instance) {
this.type = findClass(instance.getClass().getClassLoader(), type);
this.instance = this.type.cast(instance);
}
protected final Object getInstance() {
return this.instance;
}
@Override
public String toString() {
return this.instance.toString();
}
protected Class<?> findClass(String name) {
return findClass(getInstance().getClass().getClassLoader(), name);
}
protected Method findMethod(String name, Class<?>... parameterTypes) {
return findMethod(this.type, name, parameterTypes);
}
protected static Class<?> findClass(ClassLoader classLoader, String name) {
try {
return Class.forName(name, false, classLoader);
}
catch (ClassNotFoundException ex) {
throw new IllegalStateException(ex);
}
}
protected static Method findMethod(Class<?> type, String name, Class<?>... parameterTypes) {
try {
return type.getMethod(name, parameterTypes);
}
catch (Exception ex) {
throw new IllegalStateException(ex);
}
}
}
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- 本文标签： Java Spring Spring Boot
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