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Spring Framework example source code file (AbstractServiceLoaderBasedFactoryBean.java)

This example Spring Framework source code file (AbstractServiceLoaderBasedFactoryBean.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

abstractfactorybean, abstractfactorybean, abstractserviceloaderbasedfactorybean, abstractserviceloaderbasedfactorybean, beanclassloaderaware, class, class, classloader, object, object, property, util

The Spring Framework AbstractServiceLoaderBasedFactoryBean.java source code

/*
 * Copyright 2002-2007 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.beans.factory.serviceloader;

import java.util.ServiceLoader;

import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.beans.factory.config.AbstractFactoryBean;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;

/**
 * Abstract base class for FactoryBeans operating on the
 * JDK 1.6 {@link java.util.ServiceLoader} facility.
 *
 * @author Juergen Hoeller
 * @since 2.5
 * @see java.util.ServiceLoader
 */
public abstract class AbstractServiceLoaderBasedFactoryBean extends AbstractFactoryBean
		implements BeanClassLoaderAware {

	private Class serviceType;

	private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();


	/**
	 * Specify the desired service type (typically the service's public API).
	 */
	public void setServiceType(Class serviceType) {
		this.serviceType = serviceType;
	}

	/**
	 * Return the desired service type.
	 */
	public Class getServiceType() {
		return this.serviceType;
	}

	public void setBeanClassLoader(ClassLoader beanClassLoader) {
		this.beanClassLoader = beanClassLoader;
	}


	/**
	 * Delegates to {@link #getObjectToExpose(java.util.ServiceLoader)}.
	 * @return the object to expose
	 */
	protected Object createInstance() {
		Assert.notNull(getServiceType(), "Property 'serviceType' is required");
		return getObjectToExpose(ServiceLoader.load(getServiceType(), this.beanClassLoader));
	}

	/**
	 * Determine the actual object to expose for the given ServiceLoader.
	 * <p>Left to concrete subclasses.
	 * @param serviceLoader the ServiceLoader for the configured service class
	 * @return the object to expose
	 */
	protected abstract Object getObjectToExpose(ServiceLoader serviceLoader);

}

Other Spring Framework examples (source code examples)

Here is a short list of links related to this Spring Framework AbstractServiceLoaderBasedFactoryBean.java source code file:

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