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.groovy.closure;
020
021import org.codehaus.groovy.runtime.InvokerInvocationException;
022import org.crsh.shell.impl.command.spi.CommandCreationException;
023import org.crsh.shell.impl.command.spi.CommandInvoker;
024import org.crsh.command.InvocationContext;
025import org.crsh.command.ScriptException;
026import org.crsh.shell.impl.command.pipeline.PipeLine;
027
028import java.io.IOException;
029import java.lang.reflect.UndeclaredThrowableException;
030import java.util.Arrays;
031import java.util.LinkedList;
032
033/** @author Julien Viet */
034public class PipeLineInvoker {
035
036  /** . */
037  private final PipeLineClosure closure;
038
039  /** . */
040  private final Object[] args;
041
042  public PipeLineInvoker(PipeLineClosure closure, Object[] args) {
043    this.closure = closure;
044    this.args = args;
045  }
046
047  public void invoke(InvocationContext<Object> context) throws IOException, UndeclaredThrowableException {
048
049    //
050    PipeLineInvocationContext inner = new PipeLineInvocationContext(context, false);
051    LinkedList<CommandInvoker> pipe;
052    try {
053      pipe = closure.resolve2(args);
054    }
055    catch (CommandCreationException e) {
056      throw new UndeclaredThrowableException(e);
057    }
058    CommandInvoker[] array = pipe.toArray(new CommandInvoker[pipe.size()]);
059    PipeLine pipeLine = new PipeLine(array);
060
061    //
062    try {
063      pipeLine.open(inner);
064      pipeLine.flush();
065
066    }
067    catch (ScriptException e) {
068      Throwable cause = e.getCause();
069      if (cause != null) {
070        throw new InvokerInvocationException(cause);
071      } else {
072        throw e;
073      }
074    } finally {
075      // This is on purpose
076      pipeLine.close();
077    }
078  }
079
080  @Override
081  public String toString() {
082    return "PipeLineInvoker[" + closure + "](" + Arrays.toString(args) + ")";
083  }
084}