com.healthy.common.log.operation.resolver.impl.ExpressionOperationLoggingKeyResolver Maven / Gradle / Ivy

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package com.healthy.common.log.operation.resolver.impl;

import cn.hutool.core.util.ArrayUtil;
import com.healthy.common.log.operation.annotation.OperationLogging;
import com.healthy.common.log.operation.resolver.OperationLoggingKeyResolver;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.core.LocalVariableTableParameterNameDiscoverer;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.expression.Expression;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;

import java.lang.reflect.Method;

/**
 * 基于 Spring EL 表达式，
 *
 * @author xm.z
 */
public class ExpressionOperationLoggingKeyResolver implements OperationLoggingKeyResolver {

	private final ParameterNameDiscoverer parameterNameDiscoverer = new LocalVariableTableParameterNameDiscoverer();

	private final ExpressionParser expressionParser = new SpelExpressionParser();

	private static Method getMethod(JoinPoint point) {
		MethodSignature signature = (MethodSignature) point.getSignature();
		return signature.getMethod();
	}

	@Override
	public String resolver(JoinPoint joinPoint, OperationLogging operationLogging) {
		// 获得被拦截方法参数名列表
		Method method = getMethod(joinPoint);
		Object[] args = joinPoint.getArgs();
		String[] parameterNames = this.parameterNameDiscoverer.getParameterNames(method);
		// 准备 Spring EL 表达式解析的上下文
		StandardEvaluationContext evaluationContext = new StandardEvaluationContext();
		if (ArrayUtil.isNotEmpty(parameterNames)) {
			for (int i = 0; i < parameterNames.length; i++) {
				evaluationContext.setVariable(parameterNames[i], args[i]);
			}
		}
		// 解析参数
		Expression expression = this.expressionParser.parseExpression(operationLogging.expression());
		return expression.getValue(evaluationContext, String.class);
	}

}