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Spring Framework example source code file (SetFactoryBean.java)

This example Spring Framework source code file (SetFactoryBean.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, class, class, illegalargumentexception, illegalargumentexception, iterator, object, object, set, set, setfactorybean, typeconverter, util

The Spring Framework SetFactoryBean.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.config;

import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.TypeConverter;
import org.springframework.core.GenericCollectionTypeResolver;
import org.springframework.core.JdkVersion;

/**
 * Simple factory for shared Set instances. Allows for central setup
 * of Sets via the "set" element in XML bean definitions.
 *
 * @author Juergen Hoeller
 * @since 09.12.2003
 * @see ListFactoryBean
 * @see MapFactoryBean
 */
public class SetFactoryBean extends AbstractFactoryBean {

	private Set sourceSet;

	private Class targetSetClass;


	/**
	 * Set the source Set, typically populated via XML "set" elements.
	 */
	public void setSourceSet(Set sourceSet) {
		this.sourceSet = sourceSet;
	}

	/**
	 * Set the class to use for the target Set. Can be populated with a fully
	 * qualified class name when defined in a Spring application context.
	 * <p>Default is a linked HashSet, keeping the registration order.
	 * @see java.util.LinkedHashSet
	 */
	public void setTargetSetClass(Class targetSetClass) {
		if (targetSetClass == null) {
			throw new IllegalArgumentException("'targetSetClass' must not be null");
		}
		if (!Set.class.isAssignableFrom(targetSetClass)) {
			throw new IllegalArgumentException("'targetSetClass' must implement [java.util.Set]");
		}
		this.targetSetClass = targetSetClass;
	}


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

	protected Object createInstance() {
		if (this.sourceSet == null) {
			throw new IllegalArgumentException("'sourceSet' is required");
		}
		Set result = null;
		if (this.targetSetClass != null) {
			result = (Set) BeanUtils.instantiateClass(this.targetSetClass);
		}
		else {
			result = new LinkedHashSet(this.sourceSet.size());
		}
		Class valueType = null;
		if (this.targetSetClass != null && JdkVersion.isAtLeastJava15()) {
			valueType = GenericCollectionTypeResolver.getCollectionType(this.targetSetClass);
		}
		if (valueType != null) {
			TypeConverter converter = getBeanTypeConverter();
			for (Iterator it = this.sourceSet.iterator(); it.hasNext();) {
				result.add(converter.convertIfNecessary(it.next(), valueType));
			}
		}
		else {
			result.addAll(this.sourceSet);
		}
		return result;
	}

}

Other Spring Framework examples (source code examples)

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

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