/*
 * Copyright 2002-2017 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
 *
 *      http://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.aop.config;

import java.lang.reflect.Method;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;

FactoryBean implementation that locates a Method on a specified bean.
Author:Rob Harrop
Since:2.0
/** * {@link FactoryBean} implementation that locates a {@link Method} on a specified bean. * * @author Rob Harrop * @since 2.0 */
public class MethodLocatingFactoryBean implements FactoryBean<Method>, BeanFactoryAware { @Nullable private String targetBeanName; @Nullable private String methodName; @Nullable private Method method;
Set the name of the bean to locate the Method on.

This property is required.

Params:
  • targetBeanName – the name of the bean to locate the Method on
/** * Set the name of the bean to locate the {@link Method} on. * <p>This property is required. * @param targetBeanName the name of the bean to locate the {@link Method} on */
public void setTargetBeanName(String targetBeanName) { this.targetBeanName = targetBeanName; }
Set the name of the Method to locate.

This property is required.

Params:
  • methodName – the name of the Method to locate
/** * Set the name of the {@link Method} to locate. * <p>This property is required. * @param methodName the name of the {@link Method} to locate */
public void setMethodName(String methodName) { this.methodName = methodName; } @Override public void setBeanFactory(BeanFactory beanFactory) { if (!StringUtils.hasText(this.targetBeanName)) { throw new IllegalArgumentException("Property 'targetBeanName' is required"); } if (!StringUtils.hasText(this.methodName)) { throw new IllegalArgumentException("Property 'methodName' is required"); } Class<?> beanClass = beanFactory.getType(this.targetBeanName); if (beanClass == null) { throw new IllegalArgumentException("Can't determine type of bean with name '" + this.targetBeanName + "'"); } this.method = BeanUtils.resolveSignature(this.methodName, beanClass); if (this.method == null) { throw new IllegalArgumentException("Unable to locate method [" + this.methodName + "] on bean [" + this.targetBeanName + "]"); } } @Override @Nullable public Method getObject() throws Exception { return this.method; } @Override public Class<Method> getObjectType() { return Method.class; } @Override public boolean isSingleton() { return true; } }