com.livk.commons.expression.DefaultContextFactory Maven / Gradle / Ivy
/*
* Copyright 2021-2024 spring-boot-extension 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 com.livk.commons.expression;
import com.google.common.collect.Maps;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.core.StandardReflectionParameterNameDiscoverer;
import org.springframework.util.Assert;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* {@link Context}默认解析工厂
*
* 使用spring StandardReflectionParameterNameDiscoverer进行解析
*
* @author livk
* @see StandardReflectionParameterNameDiscoverer
*/
class DefaultContextFactory implements ContextFactory {
private final Map parameterNamesCache = new ConcurrentHashMap<>(64);
private final ParameterNameDiscoverer discoverer = new StandardReflectionParameterNameDiscoverer();
@Override
public Context create(Method method, Object[] args) {
Assert.notNull(method, "method not be null");
String[] parameterNames = this.parameterNamesCache.computeIfAbsent(method, discoverer::getParameterNames);
if (parameterNames == null || parameterNames.length == 0) {
return Context.create();
}
HashMap map = Maps.newHashMapWithExpectedSize(parameterNames.length);
if (args != null && parameterNames.length == args.length) {
for (int i = 0; i < parameterNames.length; i++) {
map.put(parameterNames[i], args[i]);
}
}
return Context.create(map);
}
}