cn.taketoday.expression.MethodExecutor Maven / Gradle / Ivy
/*
* Original Author -> Harry Yang ([email protected]) https://taketoday.cn
* Copyright © TODAY & 2017 - 2022 All Rights Reserved.
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see [http://www.gnu.org/licenses/]
*/
package cn.taketoday.expression;
/**
* MethodExecutors are built by the resolvers and can be cached by the infrastructure to
* repeat an operation quickly without going back to the resolvers. For example, the
* particular method to run on an object may be discovered by the reflection method
* resolver - it will then build a MethodExecutor that executes that method and the
* MethodExecutor can be reused without needing to go back to the resolver to discover
* the method again.
*
* They can become stale, and in that case should throw an AccessException:
* This will cause the infrastructure to go back to the resolvers to ask for a new one.
*
* @author Andy Clement
* @since 4.0
*/
public interface MethodExecutor {
/**
* Execute a command using the specified arguments, and using the specified expression state.
*
* @param context the evaluation context in which the command is being executed
* @param target the target object of the call - null for static methods
* @param arguments the arguments to the executor, should match (in terms of number
* and type) whatever the command will need to run
* @return the value returned from execution
* @throws AccessException if there is a problem executing the command or the
* MethodExecutor is no longer valid
*/
TypedValue execute(EvaluationContext context, Object target, Object... arguments) throws AccessException;
}