Spring Framework example source code file (MethodLocatingFactoryBean.java)

This example Spring Framework source code file (MethodLocatingFactoryBean.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

beanfactoryaware, can't, class, class, factorybean, illegalargumentexception, illegalargumentexception, methodlocatingfactorybean, object, property, property, reflection, string, string, unable

The Spring Framework MethodLocatingFactoryBean.java source code

/*
 * Copyright 2002-2006 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.util.StringUtils;

/**
 * {@link FactoryBean} implementation that locates a {@link Method} on a specified bean.
 *
 * @author Rob Harrop
 * @since 2.0
 */
public class MethodLocatingFactoryBean implements FactoryBean, BeanFactoryAware {

	private String targetBeanName;

	private String methodName;

	private Method method;


	/**
	 * 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 {@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;
	}

	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 + "]");
		}
	}


	public Object getObject() throws Exception {
		return this.method;
	}

	public Class getObjectType() {
		return Method.class;
	}

	public boolean isSingleton() {
		return true;
	}

}