/*
 * 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.tomcat;

import java.lang.reflect.InvocationTargetException;

import javax.naming.NamingException;

/**
 * SimpleInstanceManager implements the org.apache.tomcat.InstanceManager interface.
 */
public class SimpleInstanceManager implements InstanceManager {

    /**
     * Creates a new SimpleInstanceManager.
     */
    public SimpleInstanceManager() {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object newInstance(Class<?> clazz) throws IllegalAccessException, InvocationTargetException, NamingException,
            InstantiationException, NoSuchMethodException {
        return prepareInstance(clazz.getConstructor().newInstance());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object newInstance(String className) throws IllegalAccessException, InvocationTargetException,
            NamingException, InstantiationException, ClassNotFoundException, NoSuchMethodException {
        Class<?> clazz = Thread.currentThread().getContextClassLoader().loadClass(className);
        return prepareInstance(clazz.getConstructor().newInstance());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object newInstance(String fqcn, ClassLoader classLoader)
            throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException,
            ClassNotFoundException, NoSuchMethodException {
        Class<?> clazz = classLoader.loadClass(fqcn);
        return prepareInstance(clazz.getConstructor().newInstance());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void newInstance(Object o) throws IllegalAccessException, InvocationTargetException, NamingException {
        // NO-OP
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void destroyInstance(Object o) throws IllegalAccessException, InvocationTargetException {
    }

    private Object prepareInstance(Object o) {
        return o;
    }
}