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