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Spring Framework example source code file (BeanDefinitionHolder.java)

This example Spring Framework source code file (BeanDefinitionHolder.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

bean, beandefinition, beandefinition, beandefinitionholder, beandefinitionholder, beanmetadataelement, object, string, string, stringbuffer, stringbuffer

The Spring Framework BeanDefinitionHolder.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.beans.factory.config;

import org.springframework.beans.BeanMetadataElement;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

/**
 * Holder for a BeanDefinition with name and aliases.
 * Can be registered as a placeholder for an inner bean.
 *
 * <p>Can also be used for programmatic registration of inner bean
 * definitions. If you don't care about BeanNameAware and the like,
 * registering RootBeanDefinition or ChildBeanDefinition is good enough.
 *
 * @author Juergen Hoeller
 * @since 1.0.2
 * @see org.springframework.beans.factory.BeanNameAware
 * @see org.springframework.beans.factory.support.RootBeanDefinition
 * @see org.springframework.beans.factory.support.ChildBeanDefinition
 */
public class BeanDefinitionHolder implements BeanMetadataElement {

	private final BeanDefinition beanDefinition;

	private final String beanName;

	private final String[] aliases;


	/**
	 * Create a new BeanDefinitionHolder.
	 * @param beanDefinition the BeanDefinition to wrap
	 * @param beanName the name of the bean, as specified for the bean definition
	 */
	public BeanDefinitionHolder(BeanDefinition beanDefinition, String beanName) {
		this(beanDefinition, beanName, null);
	}

	/**
	 * Create a new BeanDefinitionHolder.
	 * @param beanDefinition the BeanDefinition to wrap
	 * @param beanName the name of the bean, as specified for the bean definition
	 * @param aliases alias names for the bean, or <code>null if none
	 */
	public BeanDefinitionHolder(BeanDefinition beanDefinition, String beanName, String[] aliases) {
		Assert.notNull(beanDefinition, "BeanDefinition must not be null");
		Assert.notNull(beanName, "Bean name must not be null");
		this.beanDefinition = beanDefinition;
		this.beanName = beanName;
		this.aliases = aliases;
	}

	/**
	 * Copy constructor: Create a new BeanDefinitionHolder with the
	 * same contents as the given BeanDefinitionHolder instance.
	 * <p>Note: The wrapped BeanDefinition reference is taken as-is;
	 * it is <code>not deeply copied.
	 * @param beanDefinitionHolder the BeanDefinitionHolder to copy
	 */
	public BeanDefinitionHolder(BeanDefinitionHolder beanDefinitionHolder) {
		Assert.notNull(beanDefinitionHolder, "BeanDefinitionHolder must not be null");
		this.beanDefinition = beanDefinitionHolder.getBeanDefinition();
		this.beanName = beanDefinitionHolder.getBeanName();
		this.aliases = beanDefinitionHolder.getAliases();
	}


	/**
	 * Return the wrapped BeanDefinition.
	 */
	public BeanDefinition getBeanDefinition() {
		return this.beanDefinition;
	}

	/**
	 * Return the primary name of the bean, as specified for the bean definition.
	 */
	public String getBeanName() {
		return this.beanName;
	}

	/**
	 * Return the alias names for the bean, as specified directly for the bean definition.
	 * @return the array of alias names, or <code>null if none
	 */
	public String[] getAliases() {
		return this.aliases;
	}

	/**
	 * Expose the bean definition's source object.
	 * @see BeanDefinition#getSource()
	 */
	public Object getSource() {
		return this.beanDefinition.getSource();
	}


	/**
	 * Return a friendly, short description for the bean, stating name and aliases.
	 * @see #getBeanName()
	 * @see #getAliases()
	 */
	public String getShortDescription() {
		StringBuffer sb = new StringBuffer();
		sb.append("Bean definition with name '").append(this.beanName).append("'");
		if (this.aliases != null) {
			sb.append(" and aliases [").append(StringUtils.arrayToCommaDelimitedString(this.aliases)).append("]");
		}
		return sb.toString();
	}

	/**
	 * Return a long description for the bean, including name and aliases
	 * as well as a description of the contained {@link BeanDefinition}.
	 * @see #getShortDescription()
	 * @see #getBeanDefinition()
	 */
	public String getLongDescription() {
		StringBuffer sb = new StringBuffer(getShortDescription());
		sb.append(": ").append(this.beanDefinition);
		return sb.toString();
	}

	/**
	 * This implementation returns the long description. Can be overridden
	 * to return the short description or any kind of custom description instead.
	 * @see #getLongDescription()
	 * @see #getShortDescription()
	 */
	public String toString() {
		return getLongDescription();
	}


	public boolean equals(Object other) {
		if (this == other) {
			return true;
		}
		if (!(other instanceof BeanDefinitionHolder)) {
			return false;
		}
		BeanDefinitionHolder otherHolder = (BeanDefinitionHolder) other;
		return this.beanDefinition.equals(otherHolder.beanDefinition) &&
				this.beanName.equals(otherHolder.beanName) &&
				ObjectUtils.nullSafeEquals(this.aliases, otherHolder.aliases);
	}

	public int hashCode() {
		int hashCode = this.beanDefinition.hashCode();
		hashCode = 29 * hashCode + this.beanName.hashCode();
		hashCode = 29 * hashCode + ObjectUtils.nullSafeHashCode(this.aliases);
		return hashCode;
	}

}

Other Spring Framework examples (source code examples)

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