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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 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 com.rapiddweller.common.bean;

import com.rapiddweller.common.BeanUtil;
import com.rapiddweller.common.UpdateFailedException;
import com.rapiddweller.common.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);
  }

  /**
   * New bean object.
   *
   * @param beanClassName the bean class name
   * @param properties    the properties
   * @param factory       the factory
   * @return the object
   */
  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;
  }

}