org.databene.commons.bean.BeanFactory Maven / Gradle / Ivy

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/*
 * Copyright (C) 2004-2014 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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.databene.commons.bean;

import org.databene.commons.BeanUtil;
import org.databene.commons.UpdateFailedException;
import org.databene.commons.mutator.NamedMutator;

import java.util.Map;

/**
 * Instantiates JavaBeans from class name and a Properties object 
 * that contains the text representation of the bean property values.

 * 

 * Created: 04.09.2007 21:13:06
 * @author Volker Bergmann
 */
public class BeanFactory {
	
	private static final ClassProvider DEFAULT_CLASS_PROVIDER = new DefaultClassProvider();
    /**
     * Creates an object of the specified type.
     * @param beanClassName the name of the class to instantiate
     * @param properties the bean properties
     * @return an object of the specified class
     */
    public static Object newBean(String beanClassName, Map properties) {
        return newBean(beanClassName, properties, DEFAULT_CLASS_PROVIDER);
    }

    public static Object newBean(String beanClassName, Map properties, ClassProvider factory) {
    	Object bean = BeanUtil.newInstance(factory.forName(beanClassName));
        for (Map.Entry entry : properties.entrySet()) {
            String propertyName = entry.getKey();
            NamedMutator mutator = PropertyMutatorFactory.getPropertyMutator(bean.getClass(), propertyName, false, true);
            try {
                mutator.setValue(bean, entry.getValue());
            } catch (UpdateFailedException e) {
                throw new RuntimeException("Unable to set property " + propertyName + " on class " + beanClassName, e);
            }
        }
        return bean;
    }

}