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 */
019package org.crsh.lang.impl.groovy.closure;
020
021import org.crsh.shell.impl.command.spi.CommandException;
022import org.crsh.shell.impl.command.spi.CommandInvoker;
023import org.crsh.command.InvocationContext;
024import org.crsh.shell.impl.command.pipeline.PipeLine;
025
026import java.io.IOException;
027import java.util.Arrays;
028import java.util.LinkedList;
029
030/** @author Julien Viet */
031public class PipeLineInvoker {
032
033  /** . */
034  private final PipeLineClosure closure;
035
036  /** . */
037  private final Object[] args;
038
039  public PipeLineInvoker(PipeLineClosure closure, Object[] args) {
040    this.closure = closure;
041    this.args = args;
042  }
043
044  public void invoke(InvocationContext<Object> context) throws IOException, CommandException {
045
046    //
047    PipeLineInvocationContext inner = new PipeLineInvocationContext(context);
048    LinkedList<CommandInvoker> pipe = closure.resolve2(args);
049    CommandInvoker[] array = pipe.toArray(new CommandInvoker[pipe.size()]);
050    PipeLine pipeLine = new PipeLine(array);
051
052    //
053    try {
054      pipeLine.open(inner);
055      pipeLine.flush();
056    } finally {
057      // This is on purpose
058      pipeLine.close();
059    }
060  }
061
062  @Override
063  public String toString() {
064    return "PipeLineInvoker[" + closure + "](" + Arrays.toString(args) + ")";
065  }
066}