001    /*
002     * Copyright (C) 2012 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    package org.crsh.command;
020    
021    /**
022     * A command invoker.
023     *
024     * @param <C> the consumed generic type
025     * @param <P> the produced generic type
026     */
027    public interface CommandInvoker<C, P> {
028    
029      /**
030       * Returns the class of the produced type.
031       *
032       * @return the produced type
033       */
034      Class<P> getProducedType();
035    
036      /**
037       * Returns the class of the consumed type.
038       *
039       * @return the consumed type
040       */
041      Class<C> getConsumedType();
042    
043      /**
044       * Invoke a command
045       *
046       * @param context the command execution context
047       * @throws ScriptException any script exception
048       * @return the related pipe
049       */
050      PipeCommand<C> invoke(InvocationContext<P> context) throws ScriptException;
051    
052    }