CorePropertyPlaceholderConfigurer.java

/*
 * Copyright (C) 2009-2010 Open Wide
 * Contact: contact@openwide.fr
 * 
 * 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 fr.openwide.core.spring.config;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.core.env.ConfigurablePropertyResolver;
import org.springframework.core.env.PropertyResolver;

/**
 * <p>Gère la récupération des propriétés de configuration.</p>
 * 
 * <p>Ajout de fonctionnalités supplémentaires par rapport au configurer Spring permettant :
 *  - la résolution via l'appel aux méthodes getPropertyAsXXXX(propertyName) (avec substitution des placeholders)</p>
 * 
 * @author Open Wide
 */
public class CorePropertyPlaceholderConfigurer extends PropertySourcesPlaceholderConfigurer {
	
	/**
	 * Propriétés de configuration.
	 */
	private PropertyResolver propertyResolver;
	
	/**
	 * Retourne une propriété spécifique à partir de sa clé La propriété
	 * retournée n'est pas castée.
	 * 
	 * @param key la clé
	 * @return l'objet propriété
	 */
	public String getProperty(String key) {
		String rawValue = propertyResolver.getProperty(key);
		
		if (rawValue != null) {
			return propertyResolver.resolvePlaceholders(rawValue);
		} else {
			return null;
		}
	}

	@Override
	protected void processProperties(ConfigurableListableBeanFactory beanFactoryToProcess,
			ConfigurablePropertyResolver propertyResolver) throws BeansException {
		this.propertyResolver = propertyResolver;
		
		// on garde les traitements dans la classe parente
		super.processProperties(beanFactoryToProcess, propertyResolver);
	}

}