/*
 * 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.websocket;

import javax.naming.NamingException;
import javax.websocket.DeploymentException;
import javax.websocket.Endpoint;

import org.apache.tomcat.InstanceManager;
import org.apache.tomcat.util.res.StringManager;

/**
 * Holds a reference to a WebSocket endpoint class for later instantiation.
 */
public class EndpointClassHolder implements ClientEndpointHolder {

    private static final StringManager sm = StringManager.getManager(EndpointClassHolder.class);

    private final Class<? extends Endpoint> clazz;


    /**
     * Creates a new holder for the specified endpoint class.
     *
     * @param clazz The endpoint class to hold
     */
    public EndpointClassHolder(Class<? extends Endpoint> clazz) {
        this.clazz = clazz;
    }


    @Override
    public String getClassName() {
        return clazz.getName();
    }


    @Override
    public Endpoint getInstance(InstanceManager instanceManager) throws DeploymentException {
        try {
            if (instanceManager == null) {
                return clazz.getConstructor().newInstance();
            } else {
                return (Endpoint) instanceManager.newInstance(clazz);
            }
        } catch (ReflectiveOperationException | NamingException e) {
            throw new DeploymentException(sm.getString("clientEndpointHolder.instanceCreationFailed"), e);
        }
    }
}
