servlet/src/main/java/org/jclouds/chef/servlet/functions/InitParamsToProperties.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.jclouds.chef.servlet.functions;

import java.util.Enumeration;
import java.util.Properties;

import javax.inject.Singleton;
import javax.servlet.ServletContext;

import com.google.common.base.Function;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class InitParamsToProperties
		implements
			Function<ServletContext, Properties> {

	public static final InitParamsToProperties INSTANCE = new InitParamsToProperties();

	public Properties apply(ServletContext servletContext) {
		Properties overrides = new Properties();
		Enumeration<?> e = servletContext.getInitParameterNames();
		while (e.hasMoreElements()) {
			String propertyName = e.nextElement().toString();
			overrides.setProperty(propertyName,
					servletContext.getInitParameter(propertyName));
		}
		return overrides;
	}
}