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.shell.impl.command.pipeline; 020 021import org.crsh.command.CommandContext; 022import org.crsh.text.Chunk; 023 024import java.io.IOException; 025 026/** @author Julien Viet */ 027public class ConvertingPipe<C, P, CONS extends CommandContext<? super P>> extends AbstractPipe<C, P, CONS> { 028 029 /** . */ 030 private final Class<C> consumedType; 031 032 /** . */ 033 private final Class<P> producedType; 034 035 public ConvertingPipe(Class<C> consumedType, Class<P> producedType, boolean piped) { 036 super(piped); 037 038 // 039 this.consumedType = consumedType; 040 this.producedType = producedType; 041 } 042 043 public Class<C> getConsumedType() { 044 return consumedType; 045 } 046 047 public Class<P> getProducedType() { 048 return producedType; 049 } 050 051 public void write(Chunk chunk) throws IOException { 052 if (producedType.equals(Void.class)) { 053 // 054 } else if (producedType.isAssignableFrom(Chunk.class)) { 055 P p = producedType.cast(chunk); 056 consumer.provide(p); 057 } else { 058 consumer.write(chunk); 059 } 060 } 061 062 public void provide(C element) throws IOException { 063 if (producedType.isInstance(element)) { 064 P p = producedType.cast(element); 065 consumer.provide(p); 066 } else { 067 // Discarded for now... 068 } 069 } 070}