spring Trees 源码
springboot Trees 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/Trees.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.Field;
import java.lang.reflect.Method;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
/**
* Reflection based access to {@code com.sun.source.util.Trees}.
*
* @author Phillip Webb
*/
final class Trees extends ReflectionWrapper {
private Trees(Object instance) {
super("com.sun.source.util.Trees", instance);
}
Tree getTree(Element element) throws Exception {
Object tree = findMethod("getTree", Element.class).invoke(getInstance(), element);
return (tree != null) ? new Tree(tree) : null;
}
static Trees instance(ProcessingEnvironment env) throws Exception {
try {
ClassLoader classLoader = env.getClass().getClassLoader();
Class<?> type = findClass(classLoader, "com.sun.source.util.Trees");
Method method = findMethod(type, "instance", ProcessingEnvironment.class);
return new Trees(method.invoke(null, env));
}
catch (Exception ex) {
return instance(unwrap(env));
}
}
private static ProcessingEnvironment unwrap(ProcessingEnvironment wrapper) throws Exception {
Field delegateField = wrapper.getClass().getDeclaredField("delegate");
delegateField.setAccessible(true);
return (ProcessingEnvironment) delegateField.get(wrapper);
}
}
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- 本文标签： Java Spring Spring Boot
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