camel-2.8.x/camel-core/src/main/java/org/apache/camel/util/ReflectionInjector.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.apache.camel.util;

import org.apache.camel.IsSingleton;
import org.apache.camel.spi.Injector;

/**
 * A simple implementation of {@link Injector} which just uses reflection to
 * instantiate new objects using their zero argument constructor. For more
 * complex implementations try the Spring or Guice implementations.
 * 
 * @version 
 */
public class ReflectionInjector implements Injector {

    public <T> T newInstance(Class<T> type) {
        return ObjectHelper.newInstance(type);
    }

    public <T> T newInstance(Class<T> type, Object instance) {
        if (instance instanceof IsSingleton) {
            boolean singleton = ((IsSingleton) instance).isSingleton();
            if (singleton) {
                return type.cast(instance);
            }
        }
        return newInstance(type);
    }
}