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 */ 019 020 package org.crsh.command; 021 022 import org.crsh.shell.InteractionContext; 023 import org.crsh.io.Consumer; 024 025 import java.io.IOException; 026 027 class PipeCommandProxy<C, P> implements CommandInvoker<C, P> { 028 029 /** . */ 030 private final InteractionContext<P> innerContext; 031 032 /** . */ 033 private final CommandInvoker<C, P> delegate; 034 035 /** . */ 036 private final Consumer<C> next; 037 038 PipeCommandProxy(InteractionContext<P> innerContext, CommandInvoker<C, P> delegate, Consumer<C> next) { 039 this.innerContext = innerContext; 040 this.delegate = delegate; 041 this.next = next; 042 } 043 044 void fire() { 045 open(innerContext); 046 } 047 048 public void setSession(CommandContext session) { 049 delegate.setSession(session); 050 } 051 052 public Class<P> getProducedType() { 053 return delegate.getProducedType(); 054 } 055 056 public Class<C> getConsumedType() { 057 return delegate.getConsumedType(); 058 } 059 060 public void setPiped(boolean piped) { 061 delegate.setPiped(piped); 062 } 063 064 public void open(InteractionContext<P> consumer) { 065 if (next != null && next instanceof PipeCommandProxy) { 066 ((PipeCommandProxy)next).fire(); 067 } 068 delegate.open(consumer); 069 } 070 071 public void provide(C element) throws ScriptException, IOException { 072 delegate.provide(element); 073 } 074 075 public void flush() throws ScriptException, IOException { 076 delegate.flush(); 077 if (next != null && next instanceof PipeCommand) { 078 ((PipeCommand)next).flush(); 079 } 080 } 081 082 public void close() throws ScriptException { 083 delegate.close(); 084 if (next != null && next instanceof PipeCommand) { 085 ((PipeCommand)next).close(); 086 } 087 } 088 }