/*
 * Copyright 2005-2010 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.wamblee.inject;

import java.util.NoSuchElementException;
import java.util.ServiceLoader;

/**
 * Utility for obtaining an implementation of the {@link InjectorFactory} using
 * {@link ServiceLoader}.
 * 
 * @author Erik Brakkee
 */
public class InjectorFactoryBuilder {

    /**
     * Gets the injector factory by using the first one found using 
     * {@link ServiceLoader}. 
     * 
     * @return InjectorFactory. 
     */
    public static InjectorFactory getInjectorFactory() {
        ServiceLoader<InjectorFactory> factories = ServiceLoader
            .load(InjectorFactory.class);
        try {
            return (InjectorFactory) factories.iterator().next();
        } catch (NoSuchElementException e) {
            throw new RuntimeException("Can not find InjectorFactory to use");
        }
    }
}