Smack/source/org/jivesoftware/smackx/commands/LocalCommandFactory.java

/**
 * $RCSfile$
 * $Revision$
 * $Date$
 *
 * Copyright 2008 Jive Software.
 *
 * All rights reserved. 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.jivesoftware.smackx.commands;

/**
 * A factory for creating local commands. It's useful in cases where instantiation
 * of a command is more complicated than just using the default constructor. For example,
 * when arguments must be passed into the constructor or when using a dependency injection
 * framework. When a LocalCommandFactory isn't used, you can provide the AdHocCommandManager
 * a Class object instead. For more details, see
 * {@link AdHocCommandManager#registerCommand(String, String, LocalCommandFactory)}. 
 *
 * @author Matt Tucker
 */
public interface LocalCommandFactory {

    /**
     * Returns an instance of a LocalCommand.
     *
     * @return a LocalCommand instance.
     * @throws InstantiationException if creating an instance failed.
     * @throws IllegalAccessException if creating an instance is not allowed.
     */
    public LocalCommand getInstance() throws InstantiationException, IllegalAccessException;

}