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