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.shell.impl.command.spi.CommandCreationException;
023    import org.crsh.shell.impl.command.spi.CommandInvoker;
024    import org.crsh.command.InvocationContext;
025    import org.crsh.command.ScriptException;
026    import org.crsh.shell.impl.command.pipeline.PipeLine;
027    
028    import java.io.IOException;
029    import java.lang.reflect.UndeclaredThrowableException;
030    import java.util.LinkedList;
031    
032    /** @author Julien Viet */
033    public 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    }